/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/sorted.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 16:54:42,855 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 16:54:42,857 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 16:54:42,898 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 16:54:42,952 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf [2021-06-05 16:54:42,992 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 16:54:42,993 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 16:54:42,993 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 16:54:42,993 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 16:54:42,995 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 16:54:42,996 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 16:54:42,996 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 16:54:42,996 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 16:54:42,996 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 16:54:42,996 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 16:54:42,997 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 16:54:42,997 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 16:54:42,997 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 16:54:42,998 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 16:54:42,998 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 16:54:42,998 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 16:54:42,998 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 16:54:42,998 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 16:54:42,998 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 16:54:42,998 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 16:54:42,998 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 16:54:42,999 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 16:54:42,999 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 16:54:42,999 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 16:54:42,999 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 16:54:42,999 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 16:54:42,999 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 16:54:42,999 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 16:54:42,999 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 16:54:43,000 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 16:54:43,000 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 16:54:43,000 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-06-05 16:54:43,000 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 16:54:43,301 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 16:54:43,322 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 16:54:43,325 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 16:54:43,325 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 16:54:43,327 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 16:54:43,327 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/sorted.wvr.bpl [2021-06-05 16:54:43,328 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/sorted.wvr.bpl' [2021-06-05 16:54:43,366 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 16:54:43,367 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 16:54:43,368 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 16:54:43,369 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 16:54:43,369 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 16:54:43,380 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:54:43" (1/1) ... [2021-06-05 16:54:43,388 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:54:43" (1/1) ... [2021-06-05 16:54:43,394 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 16:54:43,395 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 16:54:43,396 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 16:54:43,396 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 16:54:43,401 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:54:43" (1/1) ... [2021-06-05 16:54:43,402 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:54:43" (1/1) ... [2021-06-05 16:54:43,402 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:54:43" (1/1) ... [2021-06-05 16:54:43,403 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:54:43" (1/1) ... [2021-06-05 16:54:43,405 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:54:43" (1/1) ... [2021-06-05 16:54:43,407 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:54:43" (1/1) ... [2021-06-05 16:54:43,407 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:54:43" (1/1) ... [2021-06-05 16:54:43,408 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 16:54:43,409 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 16:54:43,409 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 16:54:43,409 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 16:54:43,410 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:54:43" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 16:54:43,484 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 16:54:43,485 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 16:54:43,485 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 16:54:43,485 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 16:54:43,485 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 16:54:43,485 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 16:54:43,485 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 16:54:43,486 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 16:54:43,486 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 16:54:43,486 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 16:54:43,486 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 16:54:43,486 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 16:54:43,487 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 16:54:43,709 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 16:54:43,709 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 16:54:43,717 INFO L202 PluginConnector]: Adding new model sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 04:54:43 BoogieIcfgContainer [2021-06-05 16:54:43,718 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 16:54:43,719 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 16:54:43,719 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 16:54:43,722 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 16:54:43,722 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:54:43" (1/2) ... [2021-06-05 16:54:43,723 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2886fbe5 and model type sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 04:54:43, skipping insertion in model container [2021-06-05 16:54:43,723 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 04:54:43" (2/2) ... [2021-06-05 16:54:43,724 INFO L111 eAbstractionObserver]: Analyzing ICFG sorted.wvr.bpl [2021-06-05 16:54:43,729 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 16:54:43,729 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 16:54:43,730 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 16:54:43,730 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 16:54:43,793 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-05 16:54:43,834 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-05 16:54:43,853 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 16:54:43,853 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 16:54:43,853 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 16:54:43,853 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 16:54:43,853 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 16:54:43,854 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 16:54:43,854 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 16:54:43,854 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 16:54:43,864 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 39 places, 32 transitions, 88 flow [2021-06-05 16:54:43,881 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 117 states, 115 states have (on average 2.756521739130435) internal successors, (317), 116 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:43,884 INFO L276 IsEmpty]: Start isEmpty. Operand has 117 states, 115 states have (on average 2.756521739130435) internal successors, (317), 116 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:43,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 16:54:43,892 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:43,892 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:43,893 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:43,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:43,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1415304500, now seen corresponding path program 1 times [2021-06-05 16:54:43,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:43,907 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295937980] [2021-06-05 16:54:43,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:43,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:44,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:44,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:44,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295937980] [2021-06-05 16:54:44,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295937980] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 16:54:44,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 16:54:44,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 16:54:44,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260722628] [2021-06-05 16:54:44,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 16:54:44,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:44,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 16:54:44,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 16:54:44,156 INFO L87 Difference]: Start difference. First operand has 117 states, 115 states have (on average 2.756521739130435) internal successors, (317), 116 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) Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:44,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:44,234 INFO L93 Difference]: Finished difference Result 410 states and 1170 transitions. [2021-06-05 16:54:44,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 16:54:44,235 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 16:54:44,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:44,258 INFO L225 Difference]: With dead ends: 410 [2021-06-05 16:54:44,258 INFO L226 Difference]: Without dead ends: 395 [2021-06-05 16:54:44,259 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 46.6ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 16:54:44,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2021-06-05 16:54:44,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 152. [2021-06-05 16:54:44,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.794701986754967) internal successors, (422), 151 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:44,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 422 transitions. [2021-06-05 16:54:44,333 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 422 transitions. Word has length 21 [2021-06-05 16:54:44,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:44,334 INFO L482 AbstractCegarLoop]: Abstraction has 152 states and 422 transitions. [2021-06-05 16:54:44,334 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:44,334 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 422 transitions. [2021-06-05 16:54:44,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 16:54:44,340 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:44,340 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:44,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 16:54:44,341 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:44,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:44,345 INFO L82 PathProgramCache]: Analyzing trace with hash 435293552, now seen corresponding path program 1 times [2021-06-05 16:54:44,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:44,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388363111] [2021-06-05 16:54:44,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:44,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:44,469 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:44,469 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:44,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388363111] [2021-06-05 16:54:44,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388363111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:44,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096795519] [2021-06-05 16:54:44,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:44,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:44,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 16:54:44,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:44,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:44,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096795519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:44,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:44,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-06-05 16:54:44,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428903557] [2021-06-05 16:54:44,726 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 16:54:44,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:44,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 16:54:44,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 16:54:44,727 INFO L87 Difference]: Start difference. First operand 152 states and 422 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:44,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:44,948 INFO L93 Difference]: Finished difference Result 532 states and 1491 transitions. [2021-06-05 16:54:44,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 16:54:44,949 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 16:54:44,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:44,952 INFO L225 Difference]: With dead ends: 532 [2021-06-05 16:54:44,952 INFO L226 Difference]: Without dead ends: 532 [2021-06-05 16:54:44,953 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 145.3ms TimeCoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:54:44,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2021-06-05 16:54:44,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 165. [2021-06-05 16:54:44,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 2.8963414634146343) internal successors, (475), 164 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:44,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 475 transitions. [2021-06-05 16:54:44,964 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 475 transitions. Word has length 23 [2021-06-05 16:54:44,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:44,964 INFO L482 AbstractCegarLoop]: Abstraction has 165 states and 475 transitions. [2021-06-05 16:54:44,964 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:44,965 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 475 transitions. [2021-06-05 16:54:44,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 16:54:44,966 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:44,966 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:45,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-06-05 16:54:45,181 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:45,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:45,182 INFO L82 PathProgramCache]: Analyzing trace with hash 1894116080, now seen corresponding path program 2 times [2021-06-05 16:54:45,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:45,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722299933] [2021-06-05 16:54:45,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:45,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:45,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:45,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:45,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722299933] [2021-06-05 16:54:45,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722299933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:45,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498181800] [2021-06-05 16:54:45,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:45,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:54:45,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:54:45,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 16:54:45,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:45,441 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:45,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498181800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:45,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:45,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-06-05 16:54:45,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920102605] [2021-06-05 16:54:45,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 16:54:45,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:45,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 16:54:45,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-05 16:54:45,448 INFO L87 Difference]: Start difference. First operand 165 states and 475 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:45,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:45,749 INFO L93 Difference]: Finished difference Result 565 states and 1578 transitions. [2021-06-05 16:54:45,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 16:54:45,750 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 16:54:45,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:45,753 INFO L225 Difference]: With dead ends: 565 [2021-06-05 16:54:45,753 INFO L226 Difference]: Without dead ends: 565 [2021-06-05 16:54:45,754 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 184.2ms TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:54:45,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-06-05 16:54:45,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 166. [2021-06-05 16:54:45,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 2.878787878787879) internal successors, (475), 165 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:45,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 475 transitions. [2021-06-05 16:54:45,775 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 475 transitions. Word has length 23 [2021-06-05 16:54:45,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:45,775 INFO L482 AbstractCegarLoop]: Abstraction has 166 states and 475 transitions. [2021-06-05 16:54:45,775 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:45,776 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 475 transitions. [2021-06-05 16:54:45,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 16:54:45,776 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:45,776 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:45,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:45,993 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:45,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:45,993 INFO L82 PathProgramCache]: Analyzing trace with hash 730755178, now seen corresponding path program 1 times [2021-06-05 16:54:45,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:45,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133796818] [2021-06-05 16:54:45,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:46,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:46,039 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:46,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:46,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133796818] [2021-06-05 16:54:46,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133796818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:46,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792205459] [2021-06-05 16:54:46,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:46,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:46,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 16:54:46,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:46,200 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:46,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792205459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:46,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:46,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-06-05 16:54:46,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39653808] [2021-06-05 16:54:46,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 16:54:46,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:46,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 16:54:46,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-06-05 16:54:46,202 INFO L87 Difference]: Start difference. First operand 166 states and 475 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:46,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:46,269 INFO L93 Difference]: Finished difference Result 356 states and 997 transitions. [2021-06-05 16:54:46,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 16:54:46,270 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 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 23 [2021-06-05 16:54:46,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:46,272 INFO L225 Difference]: With dead ends: 356 [2021-06-05 16:54:46,272 INFO L226 Difference]: Without dead ends: 356 [2021-06-05 16:54:46,272 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 68.0ms TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:54:46,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2021-06-05 16:54:46,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 186. [2021-06-05 16:54:46,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.9783783783783786) internal successors, (551), 185 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:46,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 551 transitions. [2021-06-05 16:54:46,281 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 551 transitions. Word has length 23 [2021-06-05 16:54:46,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:46,282 INFO L482 AbstractCegarLoop]: Abstraction has 186 states and 551 transitions. [2021-06-05 16:54:46,282 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:46,283 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 551 transitions. [2021-06-05 16:54:46,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 16:54:46,283 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:46,283 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:46,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:46,489 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:46,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:46,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1327749482, now seen corresponding path program 3 times [2021-06-05 16:54:46,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:46,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494967429] [2021-06-05 16:54:46,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:46,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:46,543 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:46,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:46,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494967429] [2021-06-05 16:54:46,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494967429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:46,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889979020] [2021-06-05 16:54:46,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:46,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 16:54:46,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:54:46,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 16:54:46,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:46,655 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:46,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889979020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:46,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:46,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-06-05 16:54:46,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164430021] [2021-06-05 16:54:46,656 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 16:54:46,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:46,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 16:54:46,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 16:54:46,657 INFO L87 Difference]: Start difference. First operand 186 states and 551 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:46,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:46,851 INFO L93 Difference]: Finished difference Result 597 states and 1646 transitions. [2021-06-05 16:54:46,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:54:46,851 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 16:54:46,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:46,854 INFO L225 Difference]: With dead ends: 597 [2021-06-05 16:54:46,854 INFO L226 Difference]: Without dead ends: 597 [2021-06-05 16:54:46,854 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 118.5ms TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:54:46,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2021-06-05 16:54:46,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 186. [2021-06-05 16:54:46,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.9783783783783786) internal successors, (551), 185 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:46,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 551 transitions. [2021-06-05 16:54:46,863 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 551 transitions. Word has length 23 [2021-06-05 16:54:46,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:46,863 INFO L482 AbstractCegarLoop]: Abstraction has 186 states and 551 transitions. [2021-06-05 16:54:46,863 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:46,864 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 551 transitions. [2021-06-05 16:54:46,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 16:54:46,864 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:46,864 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:47,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:47,088 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:47,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:47,088 INFO L82 PathProgramCache]: Analyzing trace with hash -1644969426, now seen corresponding path program 1 times [2021-06-05 16:54:47,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:47,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961969193] [2021-06-05 16:54:47,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:47,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:47,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:47,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:47,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961969193] [2021-06-05 16:54:47,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961969193] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 16:54:47,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 16:54:47,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 16:54:47,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833789928] [2021-06-05 16:54:47,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 16:54:47,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:47,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 16:54:47,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 16:54:47,121 INFO L87 Difference]: Start difference. First operand 186 states and 551 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:47,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:47,174 INFO L93 Difference]: Finished difference Result 329 states and 915 transitions. [2021-06-05 16:54:47,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 16:54:47,175 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 16:54:47,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:47,177 INFO L225 Difference]: With dead ends: 329 [2021-06-05 16:54:47,177 INFO L226 Difference]: Without dead ends: 323 [2021-06-05 16:54:47,177 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 22.8ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 16:54:47,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-06-05 16:54:47,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 225. [2021-06-05 16:54:47,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.924107142857143) internal successors, (655), 224 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:47,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 655 transitions. [2021-06-05 16:54:47,184 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 655 transitions. Word has length 23 [2021-06-05 16:54:47,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:47,184 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 655 transitions. [2021-06-05 16:54:47,184 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:47,184 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 655 transitions. [2021-06-05 16:54:47,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 16:54:47,185 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:47,185 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:47,185 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-05 16:54:47,185 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:47,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:47,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1918692182, now seen corresponding path program 2 times [2021-06-05 16:54:47,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:47,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358837322] [2021-06-05 16:54:47,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:47,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:47,228 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:47,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:47,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358837322] [2021-06-05 16:54:47,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358837322] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 16:54:47,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 16:54:47,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 16:54:47,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18037977] [2021-06-05 16:54:47,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 16:54:47,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:47,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 16:54:47,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 16:54:47,229 INFO L87 Difference]: Start difference. First operand 225 states and 655 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:47,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:47,271 INFO L93 Difference]: Finished difference Result 295 states and 825 transitions. [2021-06-05 16:54:47,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 16:54:47,275 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 16:54:47,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:47,277 INFO L225 Difference]: With dead ends: 295 [2021-06-05 16:54:47,277 INFO L226 Difference]: Without dead ends: 295 [2021-06-05 16:54:47,277 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 20.3ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 16:54:47,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-06-05 16:54:47,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 209. [2021-06-05 16:54:47,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.9278846153846154) internal successors, (609), 208 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:47,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 609 transitions. [2021-06-05 16:54:47,284 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 609 transitions. Word has length 23 [2021-06-05 16:54:47,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:47,284 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 609 transitions. [2021-06-05 16:54:47,284 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:47,285 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 609 transitions. [2021-06-05 16:54:47,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 16:54:47,285 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:47,285 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:47,285 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-05 16:54:47,286 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:47,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:47,286 INFO L82 PathProgramCache]: Analyzing trace with hash 1943824618, now seen corresponding path program 3 times [2021-06-05 16:54:47,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:47,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512967406] [2021-06-05 16:54:47,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:47,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:47,321 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:47,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:47,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512967406] [2021-06-05 16:54:47,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512967406] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 16:54:47,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 16:54:47,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 16:54:47,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614555752] [2021-06-05 16:54:47,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 16:54:47,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:47,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 16:54:47,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 16:54:47,323 INFO L87 Difference]: Start difference. First operand 209 states and 609 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:47,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:47,384 INFO L93 Difference]: Finished difference Result 303 states and 837 transitions. [2021-06-05 16:54:47,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 16:54:47,389 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 16:54:47,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:47,392 INFO L225 Difference]: With dead ends: 303 [2021-06-05 16:54:47,392 INFO L226 Difference]: Without dead ends: 303 [2021-06-05 16:54:47,392 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 31.8ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 16:54:47,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-06-05 16:54:47,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 201. [2021-06-05 16:54:47,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.865) internal successors, (573), 200 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:47,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 573 transitions. [2021-06-05 16:54:47,404 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 573 transitions. Word has length 23 [2021-06-05 16:54:47,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:47,404 INFO L482 AbstractCegarLoop]: Abstraction has 201 states and 573 transitions. [2021-06-05 16:54:47,404 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:47,404 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 573 transitions. [2021-06-05 16:54:47,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 16:54:47,407 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:47,407 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:47,407 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-05 16:54:47,408 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:47,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:47,408 INFO L82 PathProgramCache]: Analyzing trace with hash 2060210918, now seen corresponding path program 4 times [2021-06-05 16:54:47,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:47,408 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341691121] [2021-06-05 16:54:47,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:47,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:47,446 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:47,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:47,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341691121] [2021-06-05 16:54:47,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341691121] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 16:54:47,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 16:54:47,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 16:54:47,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661289387] [2021-06-05 16:54:47,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 16:54:47,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:47,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 16:54:47,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 16:54:47,448 INFO L87 Difference]: Start difference. First operand 201 states and 573 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:47,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:47,559 INFO L93 Difference]: Finished difference Result 326 states and 884 transitions. [2021-06-05 16:54:47,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 16:54:47,559 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 16:54:47,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:47,561 INFO L225 Difference]: With dead ends: 326 [2021-06-05 16:54:47,561 INFO L226 Difference]: Without dead ends: 322 [2021-06-05 16:54:47,561 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 50.1ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-05 16:54:47,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-06-05 16:54:47,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 201. [2021-06-05 16:54:47,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.855) internal successors, (571), 200 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:47,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 571 transitions. [2021-06-05 16:54:47,568 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 571 transitions. Word has length 23 [2021-06-05 16:54:47,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:47,569 INFO L482 AbstractCegarLoop]: Abstraction has 201 states and 571 transitions. [2021-06-05 16:54:47,569 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:47,569 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 571 transitions. [2021-06-05 16:54:47,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 16:54:47,570 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:47,570 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:47,570 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-06-05 16:54:47,570 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:47,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:47,570 INFO L82 PathProgramCache]: Analyzing trace with hash 227810994, now seen corresponding path program 2 times [2021-06-05 16:54:47,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:47,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707421613] [2021-06-05 16:54:47,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:47,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:47,606 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:47,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:47,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707421613] [2021-06-05 16:54:47,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707421613] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 16:54:47,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 16:54:47,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 16:54:47,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881865735] [2021-06-05 16:54:47,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 16:54:47,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:47,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 16:54:47,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 16:54:47,608 INFO L87 Difference]: Start difference. First operand 201 states and 571 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:47,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:47,675 INFO L93 Difference]: Finished difference Result 229 states and 638 transitions. [2021-06-05 16:54:47,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 16:54:47,675 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 16:54:47,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:47,676 INFO L225 Difference]: With dead ends: 229 [2021-06-05 16:54:47,676 INFO L226 Difference]: Without dead ends: 211 [2021-06-05 16:54:47,677 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 40.1ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 16:54:47,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-06-05 16:54:47,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 178. [2021-06-05 16:54:47,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.847457627118644) internal successors, (504), 177 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:47,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 504 transitions. [2021-06-05 16:54:47,682 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 504 transitions. Word has length 23 [2021-06-05 16:54:47,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:47,682 INFO L482 AbstractCegarLoop]: Abstraction has 178 states and 504 transitions. [2021-06-05 16:54:47,682 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:47,682 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 504 transitions. [2021-06-05 16:54:47,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 16:54:47,683 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:47,683 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:47,683 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-06-05 16:54:47,683 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:47,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:47,684 INFO L82 PathProgramCache]: Analyzing trace with hash -961400090, now seen corresponding path program 5 times [2021-06-05 16:54:47,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:47,684 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205122801] [2021-06-05 16:54:47,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:47,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:47,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:47,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:47,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205122801] [2021-06-05 16:54:47,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205122801] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 16:54:47,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 16:54:47,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 16:54:47,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510899407] [2021-06-05 16:54:47,717 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 16:54:47,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:47,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 16:54:47,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 16:54:47,717 INFO L87 Difference]: Start difference. First operand 178 states and 504 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:47,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:47,811 INFO L93 Difference]: Finished difference Result 331 states and 903 transitions. [2021-06-05 16:54:47,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 16:54:47,812 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 16:54:47,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:47,814 INFO L225 Difference]: With dead ends: 331 [2021-06-05 16:54:47,814 INFO L226 Difference]: Without dead ends: 327 [2021-06-05 16:54:47,814 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 36.5ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 16:54:47,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-06-05 16:54:47,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 198. [2021-06-05 16:54:47,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.83248730964467) internal successors, (558), 197 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:47,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 558 transitions. [2021-06-05 16:54:47,822 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 558 transitions. Word has length 23 [2021-06-05 16:54:47,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:47,822 INFO L482 AbstractCegarLoop]: Abstraction has 198 states and 558 transitions. [2021-06-05 16:54:47,822 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:47,822 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 558 transitions. [2021-06-05 16:54:47,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 16:54:47,823 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:47,823 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:47,823 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-06-05 16:54:47,823 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:47,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:47,823 INFO L82 PathProgramCache]: Analyzing trace with hash 17157354, now seen corresponding path program 6 times [2021-06-05 16:54:47,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:47,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023397628] [2021-06-05 16:54:47,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:47,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:47,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:47,859 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:47,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023397628] [2021-06-05 16:54:47,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023397628] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 16:54:47,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 16:54:47,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 16:54:47,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298606213] [2021-06-05 16:54:47,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 16:54:47,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:47,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 16:54:47,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 16:54:47,861 INFO L87 Difference]: Start difference. First operand 198 states and 558 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:47,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:47,982 INFO L93 Difference]: Finished difference Result 313 states and 871 transitions. [2021-06-05 16:54:47,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 16:54:47,989 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 16:54:47,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:47,991 INFO L225 Difference]: With dead ends: 313 [2021-06-05 16:54:47,991 INFO L226 Difference]: Without dead ends: 313 [2021-06-05 16:54:47,991 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 60.6ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:54:47,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-06-05 16:54:47,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 182. [2021-06-05 16:54:47,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.839779005524862) internal successors, (514), 181 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:47,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 514 transitions. [2021-06-05 16:54:47,997 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 514 transitions. Word has length 23 [2021-06-05 16:54:47,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:47,998 INFO L482 AbstractCegarLoop]: Abstraction has 182 states and 514 transitions. [2021-06-05 16:54:47,998 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:47,998 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 514 transitions. [2021-06-05 16:54:47,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 16:54:47,999 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:47,999 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:47,999 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-06-05 16:54:47,999 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:47,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:47,999 INFO L82 PathProgramCache]: Analyzing trace with hash 751961810, now seen corresponding path program 1 times [2021-06-05 16:54:48,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:48,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871332935] [2021-06-05 16:54:48,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:48,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:48,399 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:48,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:48,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871332935] [2021-06-05 16:54:48,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871332935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:48,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293225906] [2021-06-05 16:54:48,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:48,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:48,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 16:54:48,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:48,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:54:48,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:54:48,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:54:48,890 INFO L354 Elim1Store]: treesize reduction 12, result has 61.3 percent of original size [2021-06-05 16:54:48,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 25 [2021-06-05 16:54:48,894 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:54:48,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:54:48,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:54:48,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:54:48,914 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:54:48,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-06-05 16:54:48,946 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:54:49,067 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 33 [2021-06-05 16:54:49,068 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.0 percent of original size [2021-06-05 16:54:49,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:54:49,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:54:49,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:54:49,092 INFO L354 Elim1Store]: treesize reduction 16, result has 48.4 percent of original size [2021-06-05 16:54:49,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 21 [2021-06-05 16:54:49,105 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:54:49,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:54:49,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:54:49,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:54:49,132 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:54:49,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-06-05 16:54:49,149 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:54:49,228 INFO L628 ElimStorePlain]: treesize reduction 2, result has 96.9 percent of original size [2021-06-05 16:54:49,238 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 16:54:49,238 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:129, output treesize:70 [2021-06-05 16:54:49,346 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:49,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293225906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:49,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:49,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 16:54:49,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230211125] [2021-06-05 16:54:49,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 16:54:49,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:49,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 16:54:49,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:54:49,348 INFO L87 Difference]: Start difference. First operand 182 states and 514 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:50,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:50,138 INFO L93 Difference]: Finished difference Result 545 states and 1590 transitions. [2021-06-05 16:54:50,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 16:54:50,139 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 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 25 [2021-06-05 16:54:50,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:50,142 INFO L225 Difference]: With dead ends: 545 [2021-06-05 16:54:50,142 INFO L226 Difference]: Without dead ends: 515 [2021-06-05 16:54:50,142 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 1001.0ms TimeCoverageRelationStatistics Valid=269, Invalid=921, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 16:54:50,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2021-06-05 16:54:50,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 236. [2021-06-05 16:54:50,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 2.948936170212766) internal successors, (693), 235 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:50,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 693 transitions. [2021-06-05 16:54:50,150 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 693 transitions. Word has length 25 [2021-06-05 16:54:50,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:50,150 INFO L482 AbstractCegarLoop]: Abstraction has 236 states and 693 transitions. [2021-06-05 16:54:50,150 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:50,150 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 693 transitions. [2021-06-05 16:54:50,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 16:54:50,151 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:50,151 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:50,374 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-06-05 16:54:50,374 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:50,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:50,375 INFO L82 PathProgramCache]: Analyzing trace with hash 758582462, now seen corresponding path program 2 times [2021-06-05 16:54:50,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:50,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062121718] [2021-06-05 16:54:50,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:50,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:50,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:50,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:50,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062121718] [2021-06-05 16:54:50,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062121718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:50,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957675297] [2021-06-05 16:54:50,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:50,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:54:50,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:54:50,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 16:54:50,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:50,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:54:50,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:54:50,956 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-06-05 16:54:50,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 19 [2021-06-05 16:54:50,966 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:54:50,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:54:50,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:54:50,994 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:54:50,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 33 [2021-06-05 16:54:51,018 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:54:51,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:54:51,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:54:51,054 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 16:54:51,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 21 [2021-06-05 16:54:51,058 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:54:51,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:54:51,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:54:51,075 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:54:51,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 33 [2021-06-05 16:54:51,096 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:54:51,141 INFO L628 ElimStorePlain]: treesize reduction 18, result has 66.0 percent of original size [2021-06-05 16:54:51,143 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 16:54:51,143 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:109, output treesize:35 [2021-06-05 16:54:51,244 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:51,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957675297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:51,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:51,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-05 16:54:51,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372734239] [2021-06-05 16:54:51,245 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:54:51,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:51,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:54:51,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:54:51,246 INFO L87 Difference]: Start difference. First operand 236 states and 693 transitions. Second operand has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:52,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:52,579 INFO L93 Difference]: Finished difference Result 697 states and 2045 transitions. [2021-06-05 16:54:52,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 16:54:52,579 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 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 25 [2021-06-05 16:54:52,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:52,582 INFO L225 Difference]: With dead ends: 697 [2021-06-05 16:54:52,582 INFO L226 Difference]: Without dead ends: 682 [2021-06-05 16:54:52,583 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 1415.6ms TimeCoverageRelationStatistics Valid=346, Invalid=1136, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 16:54:52,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2021-06-05 16:54:52,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 256. [2021-06-05 16:54:52,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 3.011764705882353) internal successors, (768), 255 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:52,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 768 transitions. [2021-06-05 16:54:52,591 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 768 transitions. Word has length 25 [2021-06-05 16:54:52,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:52,591 INFO L482 AbstractCegarLoop]: Abstraction has 256 states and 768 transitions. [2021-06-05 16:54:52,591 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:52,591 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 768 transitions. [2021-06-05 16:54:52,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 16:54:52,592 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:52,592 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:52,815 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:52,816 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:52,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:52,816 INFO L82 PathProgramCache]: Analyzing trace with hash 1762556338, now seen corresponding path program 3 times [2021-06-05 16:54:52,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:52,816 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851201098] [2021-06-05 16:54:52,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:52,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:53,242 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:53,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:53,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851201098] [2021-06-05 16:54:53,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851201098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:53,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102618056] [2021-06-05 16:54:53,242 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:53,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 16:54:53,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:54:53,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 16:54:53,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:53,526 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:53,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102618056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:53,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:53,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 16:54:53,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144613654] [2021-06-05 16:54:53,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:54:53,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:53,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:54:53,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:54:53,528 INFO L87 Difference]: Start difference. First operand 256 states and 768 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:53,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:53,741 INFO L93 Difference]: Finished difference Result 450 states and 1268 transitions. [2021-06-05 16:54:53,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 16:54:53,741 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 16:54:53,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:53,743 INFO L225 Difference]: With dead ends: 450 [2021-06-05 16:54:53,743 INFO L226 Difference]: Without dead ends: 435 [2021-06-05 16:54:53,744 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 578.5ms TimeCoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:54:53,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-06-05 16:54:53,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 280. [2021-06-05 16:54:53,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 2.96415770609319) internal successors, (827), 279 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:53,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 827 transitions. [2021-06-05 16:54:53,751 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 827 transitions. Word has length 25 [2021-06-05 16:54:53,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:53,751 INFO L482 AbstractCegarLoop]: Abstraction has 280 states and 827 transitions. [2021-06-05 16:54:53,752 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:53,752 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 827 transitions. [2021-06-05 16:54:53,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 16:54:53,752 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:53,752 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:53,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:53,969 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:53,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:53,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1965066352, now seen corresponding path program 4 times [2021-06-05 16:54:53,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:53,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240357188] [2021-06-05 16:54:53,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:53,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:54,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:54,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:54,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240357188] [2021-06-05 16:54:54,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240357188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:54,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026870552] [2021-06-05 16:54:54,374 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:54,408 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:54:54,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:54:54,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 16:54:54,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:54,636 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:54,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026870552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:54,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:54,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 16:54:54,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730139637] [2021-06-05 16:54:54,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:54:54,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:54,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:54:54,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:54:54,638 INFO L87 Difference]: Start difference. First operand 280 states and 827 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:54,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:54,875 INFO L93 Difference]: Finished difference Result 406 states and 1141 transitions. [2021-06-05 16:54:54,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 16:54:54,876 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 16:54:54,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:54,878 INFO L225 Difference]: With dead ends: 406 [2021-06-05 16:54:54,878 INFO L226 Difference]: Without dead ends: 391 [2021-06-05 16:54:54,878 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 582.6ms TimeCoverageRelationStatistics Valid=153, Invalid=447, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:54:54,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-06-05 16:54:54,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 274. [2021-06-05 16:54:54,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 2.9523809523809526) internal successors, (806), 273 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:54,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 806 transitions. [2021-06-05 16:54:54,885 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 806 transitions. Word has length 25 [2021-06-05 16:54:54,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:54,885 INFO L482 AbstractCegarLoop]: Abstraction has 274 states and 806 transitions. [2021-06-05 16:54:54,886 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:54,886 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 806 transitions. [2021-06-05 16:54:54,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 16:54:54,886 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:54,886 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:55,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:55,109 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:55,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:55,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1336701998, now seen corresponding path program 1 times [2021-06-05 16:54:55,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:55,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361710269] [2021-06-05 16:54:55,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:55,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:55,196 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:55,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:55,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361710269] [2021-06-05 16:54:55,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361710269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:55,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518085379] [2021-06-05 16:54:55,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:55,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:55,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 16:54:55,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:55,362 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:55,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518085379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:55,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:55,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 16:54:55,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726202792] [2021-06-05 16:54:55,364 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:54:55,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:55,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:54:55,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:54:55,365 INFO L87 Difference]: Start difference. First operand 274 states and 806 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:55,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:55,441 INFO L93 Difference]: Finished difference Result 469 states and 1371 transitions. [2021-06-05 16:54:55,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 16:54:55,442 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 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 25 [2021-06-05 16:54:55,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:55,444 INFO L225 Difference]: With dead ends: 469 [2021-06-05 16:54:55,444 INFO L226 Difference]: Without dead ends: 454 [2021-06-05 16:54:55,445 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 127.8ms TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:54:55,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-06-05 16:54:55,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 306. [2021-06-05 16:54:55,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 2.944262295081967) internal successors, (898), 305 states have internal predecessors, (898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:55,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 898 transitions. [2021-06-05 16:54:55,453 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 898 transitions. Word has length 25 [2021-06-05 16:54:55,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:55,453 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 898 transitions. [2021-06-05 16:54:55,453 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:55,453 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 898 transitions. [2021-06-05 16:54:55,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 16:54:55,454 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:55,454 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:55,678 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:55,678 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:55,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:55,678 INFO L82 PathProgramCache]: Analyzing trace with hash -297591214, now seen corresponding path program 2 times [2021-06-05 16:54:55,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:55,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967505314] [2021-06-05 16:54:55,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:55,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:55,750 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:55,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:55,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967505314] [2021-06-05 16:54:55,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967505314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:55,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370692295] [2021-06-05 16:54:55,751 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:55,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:54:55,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:54:55,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 16:54:55,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:55,912 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:55,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370692295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:55,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:55,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 16:54:55,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518575295] [2021-06-05 16:54:55,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:54:55,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:55,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:54:55,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:54:55,913 INFO L87 Difference]: Start difference. First operand 306 states and 898 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:55,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:55,976 INFO L93 Difference]: Finished difference Result 491 states and 1441 transitions. [2021-06-05 16:54:55,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 16:54:55,977 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 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 25 [2021-06-05 16:54:55,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:55,979 INFO L225 Difference]: With dead ends: 491 [2021-06-05 16:54:55,979 INFO L226 Difference]: Without dead ends: 476 [2021-06-05 16:54:55,980 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 133.3ms TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:54:55,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-06-05 16:54:55,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 312. [2021-06-05 16:54:55,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.945337620578778) internal successors, (916), 311 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:55,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 916 transitions. [2021-06-05 16:54:55,988 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 916 transitions. Word has length 25 [2021-06-05 16:54:55,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:55,988 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 916 transitions. [2021-06-05 16:54:55,988 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:55,989 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 916 transitions. [2021-06-05 16:54:55,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 16:54:55,989 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:55,989 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:56,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:56,201 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:56,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:56,201 INFO L82 PathProgramCache]: Analyzing trace with hash 127479732, now seen corresponding path program 5 times [2021-06-05 16:54:56,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:56,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315561859] [2021-06-05 16:54:56,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:56,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:56,244 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:56,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:56,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315561859] [2021-06-05 16:54:56,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315561859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:56,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816264806] [2021-06-05 16:54:56,245 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:56,272 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:54:56,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:54:56,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:54:56,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:56,353 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:56,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816264806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:56,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:56,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 16:54:56,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342775816] [2021-06-05 16:54:56,354 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:54:56,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:56,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:54:56,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:54:56,355 INFO L87 Difference]: Start difference. First operand 312 states and 916 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:56,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:56,513 INFO L93 Difference]: Finished difference Result 446 states and 1312 transitions. [2021-06-05 16:54:56,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 16:54:56,517 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 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 27 [2021-06-05 16:54:56,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:56,519 INFO L225 Difference]: With dead ends: 446 [2021-06-05 16:54:56,519 INFO L226 Difference]: Without dead ends: 446 [2021-06-05 16:54:56,519 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 120.3ms TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:54:56,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-06-05 16:54:56,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 370. [2021-06-05 16:54:56,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 3.035230352303523) internal successors, (1120), 369 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:56,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 1120 transitions. [2021-06-05 16:54:56,528 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 1120 transitions. Word has length 27 [2021-06-05 16:54:56,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:56,528 INFO L482 AbstractCegarLoop]: Abstraction has 370 states and 1120 transitions. [2021-06-05 16:54:56,528 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:56,529 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 1120 transitions. [2021-06-05 16:54:56,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 16:54:56,529 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:56,530 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:56,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-06-05 16:54:56,753 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:56,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:56,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1011534832, now seen corresponding path program 6 times [2021-06-05 16:54:56,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:56,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288639993] [2021-06-05 16:54:56,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:56,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:56,797 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:56,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:56,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288639993] [2021-06-05 16:54:56,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288639993] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:56,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22301557] [2021-06-05 16:54:56,797 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:56,822 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:54:56,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:54:56,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:54:56,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:56,917 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:56,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22301557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:56,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:56,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:54:56,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560988774] [2021-06-05 16:54:56,918 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:54:56,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:56,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:54:56,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:54:56,919 INFO L87 Difference]: Start difference. First operand 370 states and 1120 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:57,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:57,388 INFO L93 Difference]: Finished difference Result 1017 states and 2828 transitions. [2021-06-05 16:54:57,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 16:54:57,389 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 16:54:57,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:57,393 INFO L225 Difference]: With dead ends: 1017 [2021-06-05 16:54:57,393 INFO L226 Difference]: Without dead ends: 1017 [2021-06-05 16:54:57,394 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 329.3ms TimeCoverageRelationStatistics Valid=337, Invalid=1069, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 16:54:57,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1017 states. [2021-06-05 16:54:57,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1017 to 409. [2021-06-05 16:54:57,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 3.1151960784313726) internal successors, (1271), 408 states have internal predecessors, (1271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:57,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 1271 transitions. [2021-06-05 16:54:57,409 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 1271 transitions. Word has length 27 [2021-06-05 16:54:57,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:57,410 INFO L482 AbstractCegarLoop]: Abstraction has 409 states and 1271 transitions. [2021-06-05 16:54:57,410 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:57,410 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 1271 transitions. [2021-06-05 16:54:57,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 16:54:57,411 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:57,411 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:57,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:57,625 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:57,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:57,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1961184076, now seen corresponding path program 1 times [2021-06-05 16:54:57,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:57,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034406807] [2021-06-05 16:54:57,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:57,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:57,664 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:57,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:57,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034406807] [2021-06-05 16:54:57,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034406807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:57,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422873741] [2021-06-05 16:54:57,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:57,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:57,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 16:54:57,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:57,763 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:57,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422873741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:57,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:57,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 16:54:57,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017226477] [2021-06-05 16:54:57,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:54:57,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:57,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:54:57,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:54:57,764 INFO L87 Difference]: Start difference. First operand 409 states and 1271 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:57,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:57,960 INFO L93 Difference]: Finished difference Result 838 states and 2442 transitions. [2021-06-05 16:54:57,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 16:54:57,961 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 16:54:57,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:57,963 INFO L225 Difference]: With dead ends: 838 [2021-06-05 16:54:57,964 INFO L226 Difference]: Without dead ends: 832 [2021-06-05 16:54:57,964 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 133.1ms TimeCoverageRelationStatistics Valid=125, Invalid=295, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:54:57,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 832 states. [2021-06-05 16:54:57,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 832 to 522. [2021-06-05 16:54:57,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 522 states, 521 states have (on average 3.1861804222648753) internal successors, (1660), 521 states have internal predecessors, (1660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:57,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 1660 transitions. [2021-06-05 16:54:57,978 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 1660 transitions. Word has length 27 [2021-06-05 16:54:57,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:57,978 INFO L482 AbstractCegarLoop]: Abstraction has 522 states and 1660 transitions. [2021-06-05 16:54:57,979 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:57,979 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 1660 transitions. [2021-06-05 16:54:57,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 16:54:57,980 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:57,980 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:58,203 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-06-05 16:54:58,203 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:58,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:58,203 INFO L82 PathProgramCache]: Analyzing trace with hash 1602477532, now seen corresponding path program 2 times [2021-06-05 16:54:58,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:58,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099052010] [2021-06-05 16:54:58,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:58,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:58,240 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:58,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:58,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099052010] [2021-06-05 16:54:58,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099052010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:58,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108487942] [2021-06-05 16:54:58,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:58,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:54:58,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:54:58,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 16:54:58,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:58,346 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:58,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108487942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:58,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:58,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 16:54:58,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411515879] [2021-06-05 16:54:58,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:54:58,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:58,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:54:58,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:54:58,348 INFO L87 Difference]: Start difference. First operand 522 states and 1660 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:58,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:58,553 INFO L93 Difference]: Finished difference Result 905 states and 2647 transitions. [2021-06-05 16:54:58,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 16:54:58,554 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 16:54:58,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:58,557 INFO L225 Difference]: With dead ends: 905 [2021-06-05 16:54:58,557 INFO L226 Difference]: Without dead ends: 905 [2021-06-05 16:54:58,557 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 139.4ms TimeCoverageRelationStatistics Valid=125, Invalid=295, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:54:58,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 905 states. [2021-06-05 16:54:58,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 905 to 524. [2021-06-05 16:54:58,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 523 states have (on average 3.1720841300191203) internal successors, (1659), 523 states have internal predecessors, (1659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:58,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 1659 transitions. [2021-06-05 16:54:58,571 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 1659 transitions. Word has length 27 [2021-06-05 16:54:58,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:58,572 INFO L482 AbstractCegarLoop]: Abstraction has 524 states and 1659 transitions. [2021-06-05 16:54:58,572 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:58,572 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 1659 transitions. [2021-06-05 16:54:58,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 16:54:58,573 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:58,573 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:58,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:58,789 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:58,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:58,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1743996268, now seen corresponding path program 7 times [2021-06-05 16:54:58,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:58,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690707729] [2021-06-05 16:54:58,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:58,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:58,841 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:58,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:58,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690707729] [2021-06-05 16:54:58,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690707729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:58,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540078402] [2021-06-05 16:54:58,841 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:58,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:58,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:54:58,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:58,965 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:58,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540078402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:58,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:58,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:54:58,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764527815] [2021-06-05 16:54:58,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:54:58,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:58,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:54:58,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:54:58,966 INFO L87 Difference]: Start difference. First operand 524 states and 1659 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:59,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:59,358 INFO L93 Difference]: Finished difference Result 1149 states and 3311 transitions. [2021-06-05 16:54:59,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 16:54:59,358 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 16:54:59,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:59,364 INFO L225 Difference]: With dead ends: 1149 [2021-06-05 16:54:59,364 INFO L226 Difference]: Without dead ends: 1145 [2021-06-05 16:54:59,364 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 272.8ms TimeCoverageRelationStatistics Valid=259, Invalid=797, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:54:59,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1145 states. [2021-06-05 16:54:59,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1145 to 528. [2021-06-05 16:54:59,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 528 states, 527 states have (on average 3.159392789373814) internal successors, (1665), 527 states have internal predecessors, (1665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:59,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 1665 transitions. [2021-06-05 16:54:59,382 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 1665 transitions. Word has length 27 [2021-06-05 16:54:59,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:59,382 INFO L482 AbstractCegarLoop]: Abstraction has 528 states and 1665 transitions. [2021-06-05 16:54:59,382 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:59,383 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 1665 transitions. [2021-06-05 16:54:59,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 16:54:59,384 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:59,384 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:59,606 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-06-05 16:54:59,607 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:59,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:59,607 INFO L82 PathProgramCache]: Analyzing trace with hash 1159578392, now seen corresponding path program 3 times [2021-06-05 16:54:59,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:59,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839925688] [2021-06-05 16:54:59,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:59,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:59,640 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:59,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:59,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839925688] [2021-06-05 16:54:59,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839925688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:59,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877949013] [2021-06-05 16:54:59,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:59,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:54:59,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:54:59,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 16:54:59,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:59,754 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:59,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877949013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:59,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:59,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 16:54:59,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161970699] [2021-06-05 16:54:59,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:54:59,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:59,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:54:59,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:54:59,755 INFO L87 Difference]: Start difference. First operand 528 states and 1665 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:59,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:59,924 INFO L93 Difference]: Finished difference Result 751 states and 2328 transitions. [2021-06-05 16:54:59,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 16:54:59,925 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 16:54:59,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:59,927 INFO L225 Difference]: With dead ends: 751 [2021-06-05 16:54:59,928 INFO L226 Difference]: Without dead ends: 751 [2021-06-05 16:54:59,928 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 100.4ms TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:54:59,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2021-06-05 16:54:59,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 540. [2021-06-05 16:54:59,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 539 states have (on average 3.1521335807050095) internal successors, (1699), 539 states have internal predecessors, (1699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:59,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 1699 transitions. [2021-06-05 16:54:59,941 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 1699 transitions. Word has length 27 [2021-06-05 16:54:59,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:59,941 INFO L482 AbstractCegarLoop]: Abstraction has 540 states and 1699 transitions. [2021-06-05 16:54:59,942 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:59,942 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 1699 transitions. [2021-06-05 16:54:59,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 16:54:59,943 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:59,943 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:00,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:00,161 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:00,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:00,161 INFO L82 PathProgramCache]: Analyzing trace with hash -480090768, now seen corresponding path program 8 times [2021-06-05 16:55:00,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:00,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576506080] [2021-06-05 16:55:00,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:00,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:00,200 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:00,201 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:00,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576506080] [2021-06-05 16:55:00,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576506080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:00,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368918509] [2021-06-05 16:55:00,201 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:00,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:55:00,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:00,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:55:00,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:00,359 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:00,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368918509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:00,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:00,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 16:55:00,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860675974] [2021-06-05 16:55:00,360 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:55:00,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:00,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:55:00,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:55:00,360 INFO L87 Difference]: Start difference. First operand 540 states and 1699 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:00,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:00,598 INFO L93 Difference]: Finished difference Result 983 states and 2946 transitions. [2021-06-05 16:55:00,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 16:55:00,599 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 16:55:00,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:00,602 INFO L225 Difference]: With dead ends: 983 [2021-06-05 16:55:00,602 INFO L226 Difference]: Without dead ends: 971 [2021-06-05 16:55:00,602 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 170.7ms TimeCoverageRelationStatistics Valid=138, Invalid=368, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:55:00,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 971 states. [2021-06-05 16:55:00,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 971 to 558. [2021-06-05 16:55:00,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 557 states have (on average 3.1382405745062836) internal successors, (1748), 557 states have internal predecessors, (1748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:00,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 1748 transitions. [2021-06-05 16:55:00,618 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 1748 transitions. Word has length 27 [2021-06-05 16:55:00,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:00,619 INFO L482 AbstractCegarLoop]: Abstraction has 558 states and 1748 transitions. [2021-06-05 16:55:00,619 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:00,619 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 1748 transitions. [2021-06-05 16:55:00,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 16:55:00,620 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:00,620 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:00,843 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:00,843 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:00,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:00,844 INFO L82 PathProgramCache]: Analyzing trace with hash 1407034092, now seen corresponding path program 9 times [2021-06-05 16:55:00,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:00,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910220868] [2021-06-05 16:55:00,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:00,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:00,882 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:00,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:00,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910220868] [2021-06-05 16:55:00,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910220868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:00,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074760259] [2021-06-05 16:55:00,882 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:00,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:55:00,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:00,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:55:00,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:01,006 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:01,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074760259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:01,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:01,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 16:55:01,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897574887] [2021-06-05 16:55:01,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:55:01,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:01,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:55:01,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:55:01,008 INFO L87 Difference]: Start difference. First operand 558 states and 1748 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:01,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:01,248 INFO L93 Difference]: Finished difference Result 983 states and 2948 transitions. [2021-06-05 16:55:01,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 16:55:01,249 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 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 27 [2021-06-05 16:55:01,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:01,253 INFO L225 Difference]: With dead ends: 983 [2021-06-05 16:55:01,253 INFO L226 Difference]: Without dead ends: 983 [2021-06-05 16:55:01,253 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 159.0ms TimeCoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:55:01,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 983 states. [2021-06-05 16:55:01,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 983 to 567. [2021-06-05 16:55:01,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 566 states have (on average 3.1696113074204946) internal successors, (1794), 566 states have internal predecessors, (1794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:01,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 1794 transitions. [2021-06-05 16:55:01,268 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 1794 transitions. Word has length 27 [2021-06-05 16:55:01,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:01,269 INFO L482 AbstractCegarLoop]: Abstraction has 567 states and 1794 transitions. [2021-06-05 16:55:01,269 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:01,269 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 1794 transitions. [2021-06-05 16:55:01,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 16:55:01,270 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:01,270 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:01,494 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:01,494 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:01,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:01,495 INFO L82 PathProgramCache]: Analyzing trace with hash 2004028396, now seen corresponding path program 10 times [2021-06-05 16:55:01,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:01,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885634656] [2021-06-05 16:55:01,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:01,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:01,540 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:01,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:01,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885634656] [2021-06-05 16:55:01,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885634656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:01,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681945961] [2021-06-05 16:55:01,541 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:01,575 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:55:01,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:01,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:55:01,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:01,684 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:01,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681945961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:01,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:01,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:55:01,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561473065] [2021-06-05 16:55:01,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:55:01,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:01,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:55:01,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:55:01,686 INFO L87 Difference]: Start difference. First operand 567 states and 1794 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:02,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:02,186 INFO L93 Difference]: Finished difference Result 1871 states and 5394 transitions. [2021-06-05 16:55:02,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 16:55:02,191 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 16:55:02,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:02,199 INFO L225 Difference]: With dead ends: 1871 [2021-06-05 16:55:02,199 INFO L226 Difference]: Without dead ends: 1871 [2021-06-05 16:55:02,200 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 325.0ms TimeCoverageRelationStatistics Valid=357, Invalid=1125, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 16:55:02,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1871 states. [2021-06-05 16:55:02,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1871 to 640. [2021-06-05 16:55:02,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 640 states, 639 states have (on average 3.29264475743349) internal successors, (2104), 639 states have internal predecessors, (2104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:02,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 2104 transitions. [2021-06-05 16:55:02,236 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 2104 transitions. Word has length 27 [2021-06-05 16:55:02,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:02,236 INFO L482 AbstractCegarLoop]: Abstraction has 640 states and 2104 transitions. [2021-06-05 16:55:02,236 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:02,236 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 2104 transitions. [2021-06-05 16:55:02,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 16:55:02,238 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:02,238 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:02,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:02,461 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:02,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:02,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1558477464, now seen corresponding path program 11 times [2021-06-05 16:55:02,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:02,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957279699] [2021-06-05 16:55:02,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:02,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:02,504 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:02,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:02,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957279699] [2021-06-05 16:55:02,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957279699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:02,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347038116] [2021-06-05 16:55:02,504 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:02,539 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:55:02,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:02,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:55:02,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:02,614 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:02,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347038116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:02,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:02,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:55:02,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458679413] [2021-06-05 16:55:02,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:55:02,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:02,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:55:02,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:55:02,615 INFO L87 Difference]: Start difference. First operand 640 states and 2104 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:03,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:03,058 INFO L93 Difference]: Finished difference Result 1774 states and 5180 transitions. [2021-06-05 16:55:03,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 16:55:03,058 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 16:55:03,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:03,064 INFO L225 Difference]: With dead ends: 1774 [2021-06-05 16:55:03,064 INFO L226 Difference]: Without dead ends: 1766 [2021-06-05 16:55:03,064 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 285.1ms TimeCoverageRelationStatistics Valid=300, Invalid=890, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 16:55:03,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1766 states. [2021-06-05 16:55:03,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1766 to 628. [2021-06-05 16:55:03,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 628 states, 627 states have (on average 3.291866028708134) internal successors, (2064), 627 states have internal predecessors, (2064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:03,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 2064 transitions. [2021-06-05 16:55:03,087 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 2064 transitions. Word has length 27 [2021-06-05 16:55:03,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:03,087 INFO L482 AbstractCegarLoop]: Abstraction has 628 states and 2064 transitions. [2021-06-05 16:55:03,087 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:03,087 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 2064 transitions. [2021-06-05 16:55:03,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 16:55:03,089 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:03,089 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:03,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2021-06-05 16:55:03,313 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:03,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:03,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1799894256, now seen corresponding path program 12 times [2021-06-05 16:55:03,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:03,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643383444] [2021-06-05 16:55:03,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:03,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:03,357 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:03,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:03,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643383444] [2021-06-05 16:55:03,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643383444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:03,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278626219] [2021-06-05 16:55:03,357 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:03,402 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:55:03,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:03,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:55:03,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:03,492 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:03,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278626219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:03,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:03,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:55:03,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679928137] [2021-06-05 16:55:03,493 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:55:03,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:03,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:55:03,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:55:03,494 INFO L87 Difference]: Start difference. First operand 628 states and 2064 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:04,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:04,019 INFO L93 Difference]: Finished difference Result 1916 states and 5637 transitions. [2021-06-05 16:55:04,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 16:55:04,019 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 16:55:04,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:04,023 INFO L225 Difference]: With dead ends: 1916 [2021-06-05 16:55:04,024 INFO L226 Difference]: Without dead ends: 1916 [2021-06-05 16:55:04,024 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 347.8ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 16:55:04,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1916 states. [2021-06-05 16:55:04,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1916 to 645. [2021-06-05 16:55:04,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 645 states, 644 states have (on average 3.340062111801242) internal successors, (2151), 644 states have internal predecessors, (2151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:04,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 2151 transitions. [2021-06-05 16:55:04,045 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 2151 transitions. Word has length 27 [2021-06-05 16:55:04,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:04,045 INFO L482 AbstractCegarLoop]: Abstraction has 645 states and 2151 transitions. [2021-06-05 16:55:04,045 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:04,045 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 2151 transitions. [2021-06-05 16:55:04,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 16:55:04,047 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:04,047 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:04,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:04,261 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:04,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:04,261 INFO L82 PathProgramCache]: Analyzing trace with hash -1036250512, now seen corresponding path program 13 times [2021-06-05 16:55:04,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:04,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100967507] [2021-06-05 16:55:04,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:04,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:04,303 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:04,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:04,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100967507] [2021-06-05 16:55:04,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100967507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:04,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695071714] [2021-06-05 16:55:04,304 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:04,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:04,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:55:04,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:04,426 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:04,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695071714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:04,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:04,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:55:04,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671032982] [2021-06-05 16:55:04,427 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:55:04,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:04,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:55:04,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:55:04,428 INFO L87 Difference]: Start difference. First operand 645 states and 2151 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:04,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:04,882 INFO L93 Difference]: Finished difference Result 1888 states and 5563 transitions. [2021-06-05 16:55:04,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 16:55:04,882 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 16:55:04,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:04,885 INFO L225 Difference]: With dead ends: 1888 [2021-06-05 16:55:04,885 INFO L226 Difference]: Without dead ends: 1888 [2021-06-05 16:55:04,886 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 305.7ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 16:55:04,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1888 states. [2021-06-05 16:55:04,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1888 to 635. [2021-06-05 16:55:04,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 634 states have (on average 3.326498422712934) internal successors, (2109), 634 states have internal predecessors, (2109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:04,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 2109 transitions. [2021-06-05 16:55:04,908 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 2109 transitions. Word has length 27 [2021-06-05 16:55:04,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:04,908 INFO L482 AbstractCegarLoop]: Abstraction has 635 states and 2109 transitions. [2021-06-05 16:55:04,908 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:04,908 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 2109 transitions. [2021-06-05 16:55:04,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 16:55:04,910 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:04,910 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:05,126 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:05,127 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:05,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:05,127 INFO L82 PathProgramCache]: Analyzing trace with hash 904089908, now seen corresponding path program 14 times [2021-06-05 16:55:05,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:05,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220113045] [2021-06-05 16:55:05,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:05,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:05,166 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:05,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:05,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220113045] [2021-06-05 16:55:05,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220113045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:05,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231426812] [2021-06-05 16:55:05,166 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:05,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:55:05,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:05,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:55:05,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:05,272 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:05,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231426812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:05,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:05,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 16:55:05,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758306951] [2021-06-05 16:55:05,273 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:55:05,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:05,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:55:05,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:55:05,273 INFO L87 Difference]: Start difference. First operand 635 states and 2109 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:05,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:05,454 INFO L93 Difference]: Finished difference Result 912 states and 2859 transitions. [2021-06-05 16:55:05,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 16:55:05,454 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 16:55:05,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:05,457 INFO L225 Difference]: With dead ends: 912 [2021-06-05 16:55:05,457 INFO L226 Difference]: Without dead ends: 902 [2021-06-05 16:55:05,457 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 137.1ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:55:05,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 902 states. [2021-06-05 16:55:05,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 902 to 639. [2021-06-05 16:55:05,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 638 states have (on average 3.29153605015674) internal successors, (2100), 638 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:05,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 2100 transitions. [2021-06-05 16:55:05,468 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 2100 transitions. Word has length 27 [2021-06-05 16:55:05,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:05,469 INFO L482 AbstractCegarLoop]: Abstraction has 639 states and 2100 transitions. [2021-06-05 16:55:05,469 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:05,469 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 2100 transitions. [2021-06-05 16:55:05,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 16:55:05,470 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:05,470 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:05,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-06-05 16:55:05,680 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:05,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:05,681 INFO L82 PathProgramCache]: Analyzing trace with hash -285121176, now seen corresponding path program 15 times [2021-06-05 16:55:05,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:05,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034266551] [2021-06-05 16:55:05,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:05,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:05,720 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:05,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:05,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034266551] [2021-06-05 16:55:05,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034266551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:05,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335999095] [2021-06-05 16:55:05,721 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:05,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:55:05,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:05,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:55:05,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:05,836 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:05,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335999095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:05,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:05,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 16:55:05,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959951144] [2021-06-05 16:55:05,837 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:55:05,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:05,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:55:05,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:55:05,838 INFO L87 Difference]: Start difference. First operand 639 states and 2100 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:06,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:06,244 INFO L93 Difference]: Finished difference Result 1623 states and 4845 transitions. [2021-06-05 16:55:06,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 16:55:06,245 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 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 27 [2021-06-05 16:55:06,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:06,247 INFO L225 Difference]: With dead ends: 1623 [2021-06-05 16:55:06,248 INFO L226 Difference]: Without dead ends: 1615 [2021-06-05 16:55:06,248 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 251.2ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:55:06,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1615 states. [2021-06-05 16:55:06,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1615 to 657. [2021-06-05 16:55:06,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 657 states, 656 states have (on average 3.285060975609756) internal successors, (2155), 656 states have internal predecessors, (2155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:06,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 2155 transitions. [2021-06-05 16:55:06,267 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 2155 transitions. Word has length 27 [2021-06-05 16:55:06,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:06,267 INFO L482 AbstractCegarLoop]: Abstraction has 657 states and 2155 transitions. [2021-06-05 16:55:06,267 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:06,267 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 2155 transitions. [2021-06-05 16:55:06,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 16:55:06,269 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:06,269 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:06,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:06,492 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:06,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:06,492 INFO L82 PathProgramCache]: Analyzing trace with hash 693436268, now seen corresponding path program 16 times [2021-06-05 16:55:06,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:06,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668780734] [2021-06-05 16:55:06,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:06,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:06,532 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:06,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:06,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668780734] [2021-06-05 16:55:06,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668780734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:06,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788453538] [2021-06-05 16:55:06,533 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:06,557 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:55:06,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:06,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:55:06,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:06,641 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:06,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788453538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:06,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:06,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 16:55:06,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594509861] [2021-06-05 16:55:06,642 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:55:06,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:06,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:55:06,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:55:06,642 INFO L87 Difference]: Start difference. First operand 657 states and 2155 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:07,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:07,047 INFO L93 Difference]: Finished difference Result 1707 states and 5021 transitions. [2021-06-05 16:55:07,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 16:55:07,047 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 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 27 [2021-06-05 16:55:07,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:07,051 INFO L225 Difference]: With dead ends: 1707 [2021-06-05 16:55:07,052 INFO L226 Difference]: Without dead ends: 1707 [2021-06-05 16:55:07,052 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 255.2ms TimeCoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 16:55:07,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1707 states. [2021-06-05 16:55:07,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1707 to 642. [2021-06-05 16:55:07,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 642 states, 641 states have (on average 3.282371294851794) internal successors, (2104), 641 states have internal predecessors, (2104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:07,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 2104 transitions. [2021-06-05 16:55:07,072 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 2104 transitions. Word has length 27 [2021-06-05 16:55:07,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:07,072 INFO L482 AbstractCegarLoop]: Abstraction has 642 states and 2104 transitions. [2021-06-05 16:55:07,072 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:07,072 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 2104 transitions. [2021-06-05 16:55:07,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 16:55:07,074 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:07,074 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:07,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-06-05 16:55:07,298 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:07,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:07,298 INFO L82 PathProgramCache]: Analyzing trace with hash 339248496, now seen corresponding path program 17 times [2021-06-05 16:55:07,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:07,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082034678] [2021-06-05 16:55:07,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:07,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:07,334 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:07,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:07,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082034678] [2021-06-05 16:55:07,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082034678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:07,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190483967] [2021-06-05 16:55:07,334 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:07,359 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:55:07,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:07,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:55:07,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:07,420 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:07,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190483967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:07,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:07,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 16:55:07,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125502837] [2021-06-05 16:55:07,421 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:55:07,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:07,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:55:07,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:55:07,422 INFO L87 Difference]: Start difference. First operand 642 states and 2104 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:07,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:07,643 INFO L93 Difference]: Finished difference Result 1202 states and 3649 transitions. [2021-06-05 16:55:07,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 16:55:07,644 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 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 27 [2021-06-05 16:55:07,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:07,661 INFO L225 Difference]: With dead ends: 1202 [2021-06-05 16:55:07,661 INFO L226 Difference]: Without dead ends: 1190 [2021-06-05 16:55:07,661 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 138.1ms TimeCoverageRelationStatistics Valid=146, Invalid=406, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:55:07,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1190 states. [2021-06-05 16:55:07,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1190 to 664. [2021-06-05 16:55:07,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 663 states have (on average 3.2654600301659125) internal successors, (2165), 663 states have internal predecessors, (2165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:07,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 2165 transitions. [2021-06-05 16:55:07,691 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 2165 transitions. Word has length 27 [2021-06-05 16:55:07,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:07,691 INFO L482 AbstractCegarLoop]: Abstraction has 664 states and 2165 transitions. [2021-06-05 16:55:07,691 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:07,691 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 2165 transitions. [2021-06-05 16:55:07,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 16:55:07,693 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:07,693 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:07,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-06-05 16:55:07,916 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:07,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:07,916 INFO L82 PathProgramCache]: Analyzing trace with hash 1260950636, now seen corresponding path program 18 times [2021-06-05 16:55:07,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:07,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074235792] [2021-06-05 16:55:07,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:07,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:07,954 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:07,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:07,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074235792] [2021-06-05 16:55:07,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074235792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:07,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263007947] [2021-06-05 16:55:07,955 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:07,982 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:55:07,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:07,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:55:07,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:08,044 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:08,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263007947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:08,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:08,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 16:55:08,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595806482] [2021-06-05 16:55:08,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:55:08,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:08,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:55:08,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:55:08,047 INFO L87 Difference]: Start difference. First operand 664 states and 2165 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:08,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:08,342 INFO L93 Difference]: Finished difference Result 1451 states and 4277 transitions. [2021-06-05 16:55:08,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:55:08,343 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 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 27 [2021-06-05 16:55:08,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:08,346 INFO L225 Difference]: With dead ends: 1451 [2021-06-05 16:55:08,346 INFO L226 Difference]: Without dead ends: 1443 [2021-06-05 16:55:08,347 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 169.0ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-06-05 16:55:08,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1443 states. [2021-06-05 16:55:08,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1443 to 703. [2021-06-05 16:55:08,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 702 states have (on average 3.274928774928775) internal successors, (2299), 702 states have internal predecessors, (2299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:08,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 2299 transitions. [2021-06-05 16:55:08,365 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 2299 transitions. Word has length 27 [2021-06-05 16:55:08,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:08,365 INFO L482 AbstractCegarLoop]: Abstraction has 703 states and 2299 transitions. [2021-06-05 16:55:08,366 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:08,366 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 2299 transitions. [2021-06-05 16:55:08,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 16:55:08,367 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:08,367 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:08,586 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:08,586 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:08,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:08,586 INFO L82 PathProgramCache]: Analyzing trace with hash -2055459216, now seen corresponding path program 19 times [2021-06-05 16:55:08,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:08,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108419818] [2021-06-05 16:55:08,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:08,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:08,626 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:08,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:08,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108419818] [2021-06-05 16:55:08,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108419818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:08,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386977259] [2021-06-05 16:55:08,626 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:08,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:08,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:55:08,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:08,732 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:08,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386977259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:08,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:08,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 16:55:08,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653931628] [2021-06-05 16:55:08,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:55:08,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:08,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:55:08,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:55:08,734 INFO L87 Difference]: Start difference. First operand 703 states and 2299 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:09,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:09,177 INFO L93 Difference]: Finished difference Result 1579 states and 4588 transitions. [2021-06-05 16:55:09,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 16:55:09,177 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 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 27 [2021-06-05 16:55:09,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:09,180 INFO L225 Difference]: With dead ends: 1579 [2021-06-05 16:55:09,180 INFO L226 Difference]: Without dead ends: 1579 [2021-06-05 16:55:09,181 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 265.7ms TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:55:09,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1579 states. [2021-06-05 16:55:09,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1579 to 697. [2021-06-05 16:55:09,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 696 states have (on average 3.281609195402299) internal successors, (2284), 696 states have internal predecessors, (2284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:09,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 2284 transitions. [2021-06-05 16:55:09,205 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 2284 transitions. Word has length 27 [2021-06-05 16:55:09,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:09,206 INFO L482 AbstractCegarLoop]: Abstraction has 697 states and 2284 transitions. [2021-06-05 16:55:09,206 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:09,206 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 2284 transitions. [2021-06-05 16:55:09,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 16:55:09,207 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:09,207 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:09,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:09,421 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:09,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:09,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1812947492, now seen corresponding path program 20 times [2021-06-05 16:55:09,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:09,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357381931] [2021-06-05 16:55:09,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:09,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:09,461 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:09,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:09,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357381931] [2021-06-05 16:55:09,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357381931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:09,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871038926] [2021-06-05 16:55:09,462 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:09,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:55:09,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:09,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:55:09,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:09,582 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:09,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871038926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:09,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:09,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 16:55:09,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904022940] [2021-06-05 16:55:09,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:55:09,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:09,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:55:09,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:55:09,584 INFO L87 Difference]: Start difference. First operand 697 states and 2284 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:09,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:09,931 INFO L93 Difference]: Finished difference Result 1913 states and 5956 transitions. [2021-06-05 16:55:09,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 16:55:09,931 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 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 27 [2021-06-05 16:55:09,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:09,934 INFO L225 Difference]: With dead ends: 1913 [2021-06-05 16:55:09,935 INFO L226 Difference]: Without dead ends: 1913 [2021-06-05 16:55:09,935 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 243.7ms TimeCoverageRelationStatistics Valid=230, Invalid=526, Unknown=0, NotChecked=0, Total=756 [2021-06-05 16:55:09,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1913 states. [2021-06-05 16:55:09,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1913 to 898. [2021-06-05 16:55:09,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 898 states, 897 states have (on average 3.4247491638795986) internal successors, (3072), 897 states have internal predecessors, (3072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:09,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 3072 transitions. [2021-06-05 16:55:09,954 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 3072 transitions. Word has length 27 [2021-06-05 16:55:09,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:09,954 INFO L482 AbstractCegarLoop]: Abstraction has 898 states and 3072 transitions. [2021-06-05 16:55:09,954 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:09,954 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 3072 transitions. [2021-06-05 16:55:09,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 16:55:09,956 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:09,956 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:10,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:10,177 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:10,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:10,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1979075620, now seen corresponding path program 21 times [2021-06-05 16:55:10,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:10,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101239538] [2021-06-05 16:55:10,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:10,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:10,211 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:10,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:10,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101239538] [2021-06-05 16:55:10,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101239538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:10,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674692702] [2021-06-05 16:55:10,212 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:10,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 16:55:10,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:10,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:55:10,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:10,317 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:10,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674692702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:10,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:10,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 16:55:10,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400597773] [2021-06-05 16:55:10,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:55:10,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:10,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:55:10,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:55:10,318 INFO L87 Difference]: Start difference. First operand 898 states and 3072 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:10,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:10,569 INFO L93 Difference]: Finished difference Result 1741 states and 5401 transitions. [2021-06-05 16:55:10,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 16:55:10,569 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 16:55:10,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:10,572 INFO L225 Difference]: With dead ends: 1741 [2021-06-05 16:55:10,572 INFO L226 Difference]: Without dead ends: 1731 [2021-06-05 16:55:10,573 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 194.3ms TimeCoverageRelationStatistics Valid=220, Invalid=536, Unknown=0, NotChecked=0, Total=756 [2021-06-05 16:55:10,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1731 states. [2021-06-05 16:55:10,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1731 to 895. [2021-06-05 16:55:10,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 895 states, 894 states have (on average 3.4004474272930647) internal successors, (3040), 894 states have internal predecessors, (3040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:10,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 3040 transitions. [2021-06-05 16:55:10,593 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 3040 transitions. Word has length 27 [2021-06-05 16:55:10,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:10,593 INFO L482 AbstractCegarLoop]: Abstraction has 895 states and 3040 transitions. [2021-06-05 16:55:10,593 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:10,593 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 3040 transitions. [2021-06-05 16:55:10,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 16:55:10,595 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:10,595 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:10,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:10,817 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:10,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:10,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1712063380, now seen corresponding path program 22 times [2021-06-05 16:55:10,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:10,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845901781] [2021-06-05 16:55:10,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:10,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:10,868 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:10,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:10,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845901781] [2021-06-05 16:55:10,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845901781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:10,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799944750] [2021-06-05 16:55:10,868 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:10,905 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:55:10,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:10,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:55:10,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:10,973 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:10,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799944750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:10,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:10,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 16:55:10,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633926583] [2021-06-05 16:55:10,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:55:10,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:10,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:55:10,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:55:10,975 INFO L87 Difference]: Start difference. First operand 895 states and 3040 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:11,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:11,299 INFO L93 Difference]: Finished difference Result 1821 states and 5773 transitions. [2021-06-05 16:55:11,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 16:55:11,299 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 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 27 [2021-06-05 16:55:11,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:11,303 INFO L225 Difference]: With dead ends: 1821 [2021-06-05 16:55:11,303 INFO L226 Difference]: Without dead ends: 1821 [2021-06-05 16:55:11,304 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 201.2ms TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2021-06-05 16:55:11,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1821 states. [2021-06-05 16:55:11,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1821 to 922. [2021-06-05 16:55:11,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 922 states, 921 states have (on average 3.3832790445168297) internal successors, (3116), 921 states have internal predecessors, (3116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:11,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 922 states to 922 states and 3116 transitions. [2021-06-05 16:55:11,327 INFO L78 Accepts]: Start accepts. Automaton has 922 states and 3116 transitions. Word has length 27 [2021-06-05 16:55:11,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:11,327 INFO L482 AbstractCegarLoop]: Abstraction has 922 states and 3116 transitions. [2021-06-05 16:55:11,328 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:11,328 INFO L276 IsEmpty]: Start isEmpty. Operand 922 states and 3116 transitions. [2021-06-05 16:55:11,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 16:55:11,330 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:11,330 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:11,554 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:11,554 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:11,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:11,555 INFO L82 PathProgramCache]: Analyzing trace with hash -406491114, now seen corresponding path program 23 times [2021-06-05 16:55:11,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:11,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218238107] [2021-06-05 16:55:11,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:11,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:11,593 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:11,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:11,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218238107] [2021-06-05 16:55:11,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218238107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:11,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071851567] [2021-06-05 16:55:11,593 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:11,633 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:55:11,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:11,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:55:11,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:11,734 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:11,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071851567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:11,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:11,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 16:55:11,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548416774] [2021-06-05 16:55:11,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:55:11,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:11,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:55:11,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:55:11,735 INFO L87 Difference]: Start difference. First operand 922 states and 3116 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:11,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:11,912 INFO L93 Difference]: Finished difference Result 1342 states and 4285 transitions. [2021-06-05 16:55:11,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 16:55:11,913 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 16:55:11,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:11,915 INFO L225 Difference]: With dead ends: 1342 [2021-06-05 16:55:11,915 INFO L226 Difference]: Without dead ends: 1311 [2021-06-05 16:55:11,916 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 150.4ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:55:11,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1311 states. [2021-06-05 16:55:11,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1311 to 986. [2021-06-05 16:55:11,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 986 states, 985 states have (on average 3.3573604060913707) internal successors, (3307), 985 states have internal predecessors, (3307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:11,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 986 states to 986 states and 3307 transitions. [2021-06-05 16:55:11,937 INFO L78 Accepts]: Start accepts. Automaton has 986 states and 3307 transitions. Word has length 27 [2021-06-05 16:55:11,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:11,937 INFO L482 AbstractCegarLoop]: Abstraction has 986 states and 3307 transitions. [2021-06-05 16:55:11,937 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:11,937 INFO L276 IsEmpty]: Start isEmpty. Operand 986 states and 3307 transitions. [2021-06-05 16:55:11,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 16:55:11,939 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:11,940 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:12,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2021-06-05 16:55:12,157 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:12,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:12,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1176867492, now seen corresponding path program 24 times [2021-06-05 16:55:12,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:12,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811963022] [2021-06-05 16:55:12,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:12,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:12,191 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:12,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:12,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811963022] [2021-06-05 16:55:12,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811963022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:12,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243160572] [2021-06-05 16:55:12,191 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:12,216 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:55:12,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:12,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:55:12,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:12,282 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:12,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243160572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:12,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:12,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 16:55:12,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305467076] [2021-06-05 16:55:12,282 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:55:12,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:12,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:55:12,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:55:12,283 INFO L87 Difference]: Start difference. First operand 986 states and 3307 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:12,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:12,630 INFO L93 Difference]: Finished difference Result 2119 states and 6592 transitions. [2021-06-05 16:55:12,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 16:55:12,630 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 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 27 [2021-06-05 16:55:12,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:12,633 INFO L225 Difference]: With dead ends: 2119 [2021-06-05 16:55:12,633 INFO L226 Difference]: Without dead ends: 2115 [2021-06-05 16:55:12,634 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 195.3ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:55:12,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2115 states. [2021-06-05 16:55:12,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2115 to 1074. [2021-06-05 16:55:12,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1074 states, 1073 states have (on average 3.341099720410065) internal successors, (3585), 1073 states have internal predecessors, (3585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:12,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1074 states to 1074 states and 3585 transitions. [2021-06-05 16:55:12,654 INFO L78 Accepts]: Start accepts. Automaton has 1074 states and 3585 transitions. Word has length 27 [2021-06-05 16:55:12,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:12,654 INFO L482 AbstractCegarLoop]: Abstraction has 1074 states and 3585 transitions. [2021-06-05 16:55:12,654 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:12,654 INFO L276 IsEmpty]: Start isEmpty. Operand 1074 states and 3585 transitions. [2021-06-05 16:55:12,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 16:55:12,656 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:12,656 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:12,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:12,862 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:12,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:12,862 INFO L82 PathProgramCache]: Analyzing trace with hash -198310048, now seen corresponding path program 25 times [2021-06-05 16:55:12,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:12,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064491551] [2021-06-05 16:55:12,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:12,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:12,895 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:12,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:12,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064491551] [2021-06-05 16:55:12,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064491551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:12,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169965674] [2021-06-05 16:55:12,896 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:12,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:12,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:55:12,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:12,980 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:12,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169965674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:12,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:12,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 16:55:12,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274994793] [2021-06-05 16:55:12,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:55:12,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:12,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:55:12,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:55:12,981 INFO L87 Difference]: Start difference. First operand 1074 states and 3585 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:13,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:13,403 INFO L93 Difference]: Finished difference Result 2273 states and 6985 transitions. [2021-06-05 16:55:13,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 16:55:13,404 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 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 27 [2021-06-05 16:55:13,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:13,408 INFO L225 Difference]: With dead ends: 2273 [2021-06-05 16:55:13,408 INFO L226 Difference]: Without dead ends: 2273 [2021-06-05 16:55:13,409 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 249.8ms TimeCoverageRelationStatistics Valid=292, Invalid=968, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 16:55:13,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2273 states. [2021-06-05 16:55:13,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2273 to 1032. [2021-06-05 16:55:13,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1032 states, 1031 states have (on average 3.344325897187197) internal successors, (3448), 1031 states have internal predecessors, (3448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:13,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1032 states to 1032 states and 3448 transitions. [2021-06-05 16:55:13,436 INFO L78 Accepts]: Start accepts. Automaton has 1032 states and 3448 transitions. Word has length 27 [2021-06-05 16:55:13,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:13,436 INFO L482 AbstractCegarLoop]: Abstraction has 1032 states and 3448 transitions. [2021-06-05 16:55:13,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:13,436 INFO L276 IsEmpty]: Start isEmpty. Operand 1032 states and 3448 transitions. [2021-06-05 16:55:13,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 16:55:13,438 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:13,438 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:13,661 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-06-05 16:55:13,661 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:13,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:13,661 INFO L82 PathProgramCache]: Analyzing trace with hash 2016185652, now seen corresponding path program 26 times [2021-06-05 16:55:13,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:13,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717451659] [2021-06-05 16:55:13,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:13,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:13,700 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:13,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:13,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717451659] [2021-06-05 16:55:13,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717451659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:13,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218796138] [2021-06-05 16:55:13,700 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:13,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:55:13,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:13,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:55:13,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:13,788 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:13,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218796138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:13,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:13,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 16:55:13,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237811008] [2021-06-05 16:55:13,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:55:13,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:13,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:55:13,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:55:13,789 INFO L87 Difference]: Start difference. First operand 1032 states and 3448 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:14,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:14,064 INFO L93 Difference]: Finished difference Result 2014 states and 6277 transitions. [2021-06-05 16:55:14,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 16:55:14,064 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 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 27 [2021-06-05 16:55:14,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:14,067 INFO L225 Difference]: With dead ends: 2014 [2021-06-05 16:55:14,067 INFO L226 Difference]: Without dead ends: 2014 [2021-06-05 16:55:14,068 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 162.1ms TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:55:14,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2014 states. [2021-06-05 16:55:14,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2014 to 1044. [2021-06-05 16:55:14,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1044 states, 1043 states have (on average 3.340364333652924) internal successors, (3484), 1043 states have internal predecessors, (3484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:14,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1044 states to 1044 states and 3484 transitions. [2021-06-05 16:55:14,087 INFO L78 Accepts]: Start accepts. Automaton has 1044 states and 3484 transitions. Word has length 27 [2021-06-05 16:55:14,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:14,087 INFO L482 AbstractCegarLoop]: Abstraction has 1044 states and 3484 transitions. [2021-06-05 16:55:14,087 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:14,087 INFO L276 IsEmpty]: Start isEmpty. Operand 1044 states and 3484 transitions. [2021-06-05 16:55:14,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 16:55:14,089 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:14,089 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:14,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:14,293 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:14,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:14,293 INFO L82 PathProgramCache]: Analyzing trace with hash -499902228, now seen corresponding path program 27 times [2021-06-05 16:55:14,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:14,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866641102] [2021-06-05 16:55:14,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:14,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:14,325 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:14,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:14,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866641102] [2021-06-05 16:55:14,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866641102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:14,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64242004] [2021-06-05 16:55:14,326 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:14,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:55:14,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:14,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:55:14,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:14,402 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:14,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64242004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:14,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:14,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 16:55:14,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709720959] [2021-06-05 16:55:14,403 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 16:55:14,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:14,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 16:55:14,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 16:55:14,403 INFO L87 Difference]: Start difference. First operand 1044 states and 3484 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:14,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:14,651 INFO L93 Difference]: Finished difference Result 1776 states and 5488 transitions. [2021-06-05 16:55:14,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 16:55:14,652 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 16:55:14,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:14,655 INFO L225 Difference]: With dead ends: 1776 [2021-06-05 16:55:14,655 INFO L226 Difference]: Without dead ends: 1764 [2021-06-05 16:55:14,655 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 126.9ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:55:14,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1764 states. [2021-06-05 16:55:14,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1764 to 1102. [2021-06-05 16:55:14,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1102 states, 1101 states have (on average 3.321525885558583) internal successors, (3657), 1101 states have internal predecessors, (3657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:14,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1102 states to 1102 states and 3657 transitions. [2021-06-05 16:55:14,673 INFO L78 Accepts]: Start accepts. Automaton has 1102 states and 3657 transitions. Word has length 27 [2021-06-05 16:55:14,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:14,673 INFO L482 AbstractCegarLoop]: Abstraction has 1102 states and 3657 transitions. [2021-06-05 16:55:14,673 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:14,673 INFO L276 IsEmpty]: Start isEmpty. Operand 1102 states and 3657 transitions. [2021-06-05 16:55:14,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 16:55:14,675 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:14,675 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:14,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-06-05 16:55:14,889 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:14,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:14,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1595195728, now seen corresponding path program 28 times [2021-06-05 16:55:14,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:14,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306612934] [2021-06-05 16:55:14,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:14,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:14,928 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:14,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:14,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306612934] [2021-06-05 16:55:14,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306612934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:14,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571949664] [2021-06-05 16:55:14,928 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:14,968 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:55:14,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:14,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:55:14,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:15,024 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:15,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571949664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:15,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:15,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 16:55:15,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422940465] [2021-06-05 16:55:15,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 16:55:15,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:15,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 16:55:15,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 16:55:15,026 INFO L87 Difference]: Start difference. First operand 1102 states and 3657 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:15,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:15,338 INFO L93 Difference]: Finished difference Result 1940 states and 5945 transitions. [2021-06-05 16:55:15,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 16:55:15,339 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 16:55:15,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:15,341 INFO L225 Difference]: With dead ends: 1940 [2021-06-05 16:55:15,342 INFO L226 Difference]: Without dead ends: 1940 [2021-06-05 16:55:15,342 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 171.0ms TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:55:15,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1940 states. [2021-06-05 16:55:15,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1940 to 1158. [2021-06-05 16:55:15,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1158 states, 1157 states have (on average 3.3094209161624892) internal successors, (3829), 1157 states have internal predecessors, (3829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:15,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1158 states to 1158 states and 3829 transitions. [2021-06-05 16:55:15,361 INFO L78 Accepts]: Start accepts. Automaton has 1158 states and 3829 transitions. Word has length 27 [2021-06-05 16:55:15,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:15,361 INFO L482 AbstractCegarLoop]: Abstraction has 1158 states and 3829 transitions. [2021-06-05 16:55:15,361 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:15,361 INFO L276 IsEmpty]: Start isEmpty. Operand 1158 states and 3829 transitions. [2021-06-05 16:55:15,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 16:55:15,363 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:15,363 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:15,563 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-06-05 16:55:15,564 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:15,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:15,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1507209712, now seen corresponding path program 3 times [2021-06-05 16:55:15,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:15,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975098727] [2021-06-05 16:55:15,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:15,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:15,603 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:15,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:15,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975098727] [2021-06-05 16:55:15,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975098727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:15,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896234927] [2021-06-05 16:55:15,603 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:15,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:55:15,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:15,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:55:15,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:15,695 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:15,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896234927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:15,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:15,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 16:55:15,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364733164] [2021-06-05 16:55:15,696 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:55:15,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:15,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:55:15,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:55:15,696 INFO L87 Difference]: Start difference. First operand 1158 states and 3829 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:15,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:15,956 INFO L93 Difference]: Finished difference Result 1759 states and 5449 transitions. [2021-06-05 16:55:15,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 16:55:15,957 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 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 27 [2021-06-05 16:55:15,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:15,959 INFO L225 Difference]: With dead ends: 1759 [2021-06-05 16:55:15,959 INFO L226 Difference]: Without dead ends: 1759 [2021-06-05 16:55:15,959 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 184.8ms TimeCoverageRelationStatistics Valid=178, Invalid=524, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:55:15,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1759 states. [2021-06-05 16:55:15,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1759 to 1180. [2021-06-05 16:55:15,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1180 states, 1179 states have (on average 3.3078880407124682) internal successors, (3900), 1179 states have internal predecessors, (3900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:15,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 3900 transitions. [2021-06-05 16:55:15,983 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 3900 transitions. Word has length 27 [2021-06-05 16:55:15,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:15,983 INFO L482 AbstractCegarLoop]: Abstraction has 1180 states and 3900 transitions. [2021-06-05 16:55:15,983 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:15,984 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 3900 transitions. [2021-06-05 16:55:15,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 16:55:15,986 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:15,986 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:16,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-06-05 16:55:16,201 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:16,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:16,201 INFO L82 PathProgramCache]: Analyzing trace with hash 877590964, now seen corresponding path program 4 times [2021-06-05 16:55:16,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:16,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766367962] [2021-06-05 16:55:16,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:16,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:16,230 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:16,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:16,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766367962] [2021-06-05 16:55:16,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766367962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:16,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664481317] [2021-06-05 16:55:16,231 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:16,254 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:55:16,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:16,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 16:55:16,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:16,307 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:16,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664481317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:16,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:16,308 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 16:55:16,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857028416] [2021-06-05 16:55:16,308 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 16:55:16,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:16,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 16:55:16,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-06-05 16:55:16,309 INFO L87 Difference]: Start difference. First operand 1180 states and 3900 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:16,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:16,423 INFO L93 Difference]: Finished difference Result 1872 states and 5977 transitions. [2021-06-05 16:55:16,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 16:55:16,423 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 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 27 [2021-06-05 16:55:16,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:16,426 INFO L225 Difference]: With dead ends: 1872 [2021-06-05 16:55:16,426 INFO L226 Difference]: Without dead ends: 1854 [2021-06-05 16:55:16,426 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 73.9ms TimeCoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:55:16,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1854 states. [2021-06-05 16:55:16,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1854 to 1389. [2021-06-05 16:55:16,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1389 states, 1388 states have (on average 3.3746397694524495) internal successors, (4684), 1388 states have internal predecessors, (4684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:16,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1389 states to 1389 states and 4684 transitions. [2021-06-05 16:55:16,447 INFO L78 Accepts]: Start accepts. Automaton has 1389 states and 4684 transitions. Word has length 27 [2021-06-05 16:55:16,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:16,447 INFO L482 AbstractCegarLoop]: Abstraction has 1389 states and 4684 transitions. [2021-06-05 16:55:16,447 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:16,447 INFO L276 IsEmpty]: Start isEmpty. Operand 1389 states and 4684 transitions. [2021-06-05 16:55:16,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 16:55:16,449 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:16,449 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:16,661 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-06-05 16:55:16,661 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:16,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:16,662 INFO L82 PathProgramCache]: Analyzing trace with hash 118622872, now seen corresponding path program 5 times [2021-06-05 16:55:16,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:16,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883751555] [2021-06-05 16:55:16,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:16,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:16,692 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:16,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:16,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883751555] [2021-06-05 16:55:16,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883751555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:16,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754784704] [2021-06-05 16:55:16,692 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:16,737 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:55:16,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:16,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 16:55:16,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:16,790 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:16,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754784704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:16,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:16,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2021-06-05 16:55:16,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433205129] [2021-06-05 16:55:16,790 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 16:55:16,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:16,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 16:55:16,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 16:55:16,791 INFO L87 Difference]: Start difference. First operand 1389 states and 4684 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:16,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:16,933 INFO L93 Difference]: Finished difference Result 2133 states and 6693 transitions. [2021-06-05 16:55:16,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 16:55:16,933 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 16:55:16,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:16,936 INFO L225 Difference]: With dead ends: 2133 [2021-06-05 16:55:16,936 INFO L226 Difference]: Without dead ends: 2133 [2021-06-05 16:55:16,937 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 102.4ms TimeCoverageRelationStatistics Valid=105, Invalid=167, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:55:16,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2133 states. [2021-06-05 16:55:16,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2133 to 1392. [2021-06-05 16:55:16,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1392 states, 1391 states have (on average 3.3608914450035945) internal successors, (4675), 1391 states have internal predecessors, (4675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:16,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1392 states to 1392 states and 4675 transitions. [2021-06-05 16:55:16,966 INFO L78 Accepts]: Start accepts. Automaton has 1392 states and 4675 transitions. Word has length 27 [2021-06-05 16:55:16,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:16,966 INFO L482 AbstractCegarLoop]: Abstraction has 1392 states and 4675 transitions. [2021-06-05 16:55:16,966 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:16,966 INFO L276 IsEmpty]: Start isEmpty. Operand 1392 states and 4675 transitions. [2021-06-05 16:55:16,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 16:55:16,969 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:16,969 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:17,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-06-05 16:55:17,185 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:17,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:17,185 INFO L82 PathProgramCache]: Analyzing trace with hash 260141608, now seen corresponding path program 6 times [2021-06-05 16:55:17,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:17,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136030631] [2021-06-05 16:55:17,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:17,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:17,222 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:17,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:17,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136030631] [2021-06-05 16:55:17,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136030631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:17,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279985301] [2021-06-05 16:55:17,223 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:17,253 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:55:17,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:17,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:55:17,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:17,329 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:17,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279985301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:17,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:17,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-06-05 16:55:17,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382150439] [2021-06-05 16:55:17,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:55:17,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:17,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:55:17,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:55:17,330 INFO L87 Difference]: Start difference. First operand 1392 states and 4675 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:17,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:17,586 INFO L93 Difference]: Finished difference Result 2050 states and 6469 transitions. [2021-06-05 16:55:17,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 16:55:17,587 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 16:55:17,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:17,590 INFO L225 Difference]: With dead ends: 2050 [2021-06-05 16:55:17,591 INFO L226 Difference]: Without dead ends: 2046 [2021-06-05 16:55:17,591 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 173.2ms TimeCoverageRelationStatistics Valid=149, Invalid=403, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:55:17,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2046 states. [2021-06-05 16:55:17,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2046 to 1392. [2021-06-05 16:55:17,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1392 states, 1391 states have (on average 3.359453630481668) internal successors, (4673), 1391 states have internal predecessors, (4673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:17,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1392 states to 1392 states and 4673 transitions. [2021-06-05 16:55:17,622 INFO L78 Accepts]: Start accepts. Automaton has 1392 states and 4673 transitions. Word has length 27 [2021-06-05 16:55:17,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:17,622 INFO L482 AbstractCegarLoop]: Abstraction has 1392 states and 4673 transitions. [2021-06-05 16:55:17,622 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:17,622 INFO L276 IsEmpty]: Start isEmpty. Operand 1392 states and 4673 transitions. [2021-06-05 16:55:17,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 16:55:17,625 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:17,625 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:17,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-06-05 16:55:17,853 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:17,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:17,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1708393328, now seen corresponding path program 7 times [2021-06-05 16:55:17,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:17,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892150682] [2021-06-05 16:55:17,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:17,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:17,889 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:17,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:17,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892150682] [2021-06-05 16:55:17,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892150682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:17,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478116701] [2021-06-05 16:55:17,890 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:17,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:17,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:55:17,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:17,982 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:17,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478116701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:17,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:17,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-06-05 16:55:17,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366924953] [2021-06-05 16:55:17,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:55:17,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:17,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:55:17,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:55:17,983 INFO L87 Difference]: Start difference. First operand 1392 states and 4673 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:18,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:18,234 INFO L93 Difference]: Finished difference Result 2257 states and 7002 transitions. [2021-06-05 16:55:18,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 16:55:18,234 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 16:55:18,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:18,237 INFO L225 Difference]: With dead ends: 2257 [2021-06-05 16:55:18,238 INFO L226 Difference]: Without dead ends: 2257 [2021-06-05 16:55:18,238 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 161.7ms TimeCoverageRelationStatistics Valid=189, Invalid=513, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:55:18,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2257 states. [2021-06-05 16:55:18,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2257 to 1442. [2021-06-05 16:55:18,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1442 states, 1441 states have (on average 3.3587786259541983) internal successors, (4840), 1441 states have internal predecessors, (4840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:18,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 4840 transitions. [2021-06-05 16:55:18,263 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 4840 transitions. Word has length 27 [2021-06-05 16:55:18,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:18,263 INFO L482 AbstractCegarLoop]: Abstraction has 1442 states and 4840 transitions. [2021-06-05 16:55:18,263 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:18,263 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 4840 transitions. [2021-06-05 16:55:18,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 16:55:18,265 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:18,265 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:18,465 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:18,466 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:18,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:18,466 INFO L82 PathProgramCache]: Analyzing trace with hash -1264325580, now seen corresponding path program 8 times [2021-06-05 16:55:18,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:18,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797930016] [2021-06-05 16:55:18,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:18,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:18,496 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:18,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:18,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797930016] [2021-06-05 16:55:18,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797930016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:18,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153005218] [2021-06-05 16:55:18,497 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:18,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:55:18,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:18,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 16:55:18,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:18,604 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:55:18,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153005218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:18,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:18,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2021-06-05 16:55:18,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962853411] [2021-06-05 16:55:18,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 16:55:18,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:18,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 16:55:18,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-06-05 16:55:18,606 INFO L87 Difference]: Start difference. First operand 1442 states and 4840 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:18,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:18,783 INFO L93 Difference]: Finished difference Result 2263 states and 7241 transitions. [2021-06-05 16:55:18,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 16:55:18,783 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 16:55:18,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:18,787 INFO L225 Difference]: With dead ends: 2263 [2021-06-05 16:55:18,787 INFO L226 Difference]: Without dead ends: 2257 [2021-06-05 16:55:18,787 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 108.2ms TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:55:18,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2257 states. [2021-06-05 16:55:18,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2257 to 1535. [2021-06-05 16:55:18,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1535 states, 1534 states have (on average 3.3872229465449806) internal successors, (5196), 1534 states have internal predecessors, (5196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:18,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1535 states to 1535 states and 5196 transitions. [2021-06-05 16:55:18,811 INFO L78 Accepts]: Start accepts. Automaton has 1535 states and 5196 transitions. Word has length 27 [2021-06-05 16:55:18,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:18,811 INFO L482 AbstractCegarLoop]: Abstraction has 1535 states and 5196 transitions. [2021-06-05 16:55:18,811 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:18,811 INFO L276 IsEmpty]: Start isEmpty. Operand 1535 states and 5196 transitions. [2021-06-05 16:55:18,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 16:55:18,814 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:18,814 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:19,014 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:19,014 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:19,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:19,015 INFO L82 PathProgramCache]: Analyzing trace with hash -1995631268, now seen corresponding path program 9 times [2021-06-05 16:55:19,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:19,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417533658] [2021-06-05 16:55:19,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:19,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:19,054 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:19,055 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:19,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417533658] [2021-06-05 16:55:19,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417533658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:19,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362731318] [2021-06-05 16:55:19,055 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:19,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:55:19,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:19,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 16:55:19,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:19,173 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:55:19,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362731318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:19,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:19,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2021-06-05 16:55:19,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057347950] [2021-06-05 16:55:19,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 16:55:19,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:19,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 16:55:19,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-06-05 16:55:19,175 INFO L87 Difference]: Start difference. First operand 1535 states and 5196 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:19,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:19,339 INFO L93 Difference]: Finished difference Result 2415 states and 7685 transitions. [2021-06-05 16:55:19,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 16:55:19,340 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 16:55:19,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:19,344 INFO L225 Difference]: With dead ends: 2415 [2021-06-05 16:55:19,344 INFO L226 Difference]: Without dead ends: 2415 [2021-06-05 16:55:19,344 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 112.5ms TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:55:19,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2415 states. [2021-06-05 16:55:19,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2415 to 1459. [2021-06-05 16:55:19,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1459 states, 1458 states have (on average 3.347736625514403) internal successors, (4881), 1458 states have internal predecessors, (4881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:19,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1459 states to 1459 states and 4881 transitions. [2021-06-05 16:55:19,373 INFO L78 Accepts]: Start accepts. Automaton has 1459 states and 4881 transitions. Word has length 27 [2021-06-05 16:55:19,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:19,374 INFO L482 AbstractCegarLoop]: Abstraction has 1459 states and 4881 transitions. [2021-06-05 16:55:19,374 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:19,374 INFO L276 IsEmpty]: Start isEmpty. Operand 1459 states and 4881 transitions. [2021-06-05 16:55:19,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 16:55:19,376 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:19,376 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:19,593 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-06-05 16:55:19,593 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:19,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:19,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1854112532, now seen corresponding path program 10 times [2021-06-05 16:55:19,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:19,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110847091] [2021-06-05 16:55:19,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:19,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:19,633 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:19,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:19,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110847091] [2021-06-05 16:55:19,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110847091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:19,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340159372] [2021-06-05 16:55:19,634 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:19,665 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:55:19,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:19,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:55:19,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:19,737 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:55:19,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340159372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:19,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:19,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-06-05 16:55:19,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590013393] [2021-06-05 16:55:19,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:55:19,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:19,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:55:19,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:55:19,739 INFO L87 Difference]: Start difference. First operand 1459 states and 4881 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:19,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:19,989 INFO L93 Difference]: Finished difference Result 2204 states and 6862 transitions. [2021-06-05 16:55:19,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 16:55:19,989 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 16:55:19,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:19,992 INFO L225 Difference]: With dead ends: 2204 [2021-06-05 16:55:19,992 INFO L226 Difference]: Without dead ends: 2200 [2021-06-05 16:55:19,992 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 152.0ms TimeCoverageRelationStatistics Valid=147, Invalid=405, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:55:19,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2200 states. [2021-06-05 16:55:20,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2200 to 1419. [2021-06-05 16:55:20,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1419 states, 1418 states have (on average 3.349083215796897) internal successors, (4749), 1418 states have internal predecessors, (4749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:20,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1419 states to 1419 states and 4749 transitions. [2021-06-05 16:55:20,012 INFO L78 Accepts]: Start accepts. Automaton has 1419 states and 4749 transitions. Word has length 27 [2021-06-05 16:55:20,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:20,012 INFO L482 AbstractCegarLoop]: Abstraction has 1419 states and 4749 transitions. [2021-06-05 16:55:20,013 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:20,013 INFO L276 IsEmpty]: Start isEmpty. Operand 1419 states and 4749 transitions. [2021-06-05 16:55:20,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 16:55:20,014 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:20,015 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:20,215 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:20,215 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:20,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:20,215 INFO L82 PathProgramCache]: Analyzing trace with hash 1856436888, now seen corresponding path program 11 times [2021-06-05 16:55:20,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:20,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7342023] [2021-06-05 16:55:20,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:20,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:20,241 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:20,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:20,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7342023] [2021-06-05 16:55:20,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7342023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:20,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431840442] [2021-06-05 16:55:20,242 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:20,266 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:55:20,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:20,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 16:55:20,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:20,320 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:20,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431840442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:20,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:20,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 16:55:20,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646185177] [2021-06-05 16:55:20,320 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 16:55:20,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:20,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 16:55:20,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-06-05 16:55:20,321 INFO L87 Difference]: Start difference. First operand 1419 states and 4749 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:20,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:20,464 INFO L93 Difference]: Finished difference Result 2022 states and 6496 transitions. [2021-06-05 16:55:20,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 16:55:20,465 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 16:55:20,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:20,467 INFO L225 Difference]: With dead ends: 2022 [2021-06-05 16:55:20,467 INFO L226 Difference]: Without dead ends: 2022 [2021-06-05 16:55:20,467 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 95.9ms TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:55:20,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2022 states. [2021-06-05 16:55:20,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2022 to 1518. [2021-06-05 16:55:20,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1518 states, 1517 states have (on average 3.3698088332234675) internal successors, (5112), 1517 states have internal predecessors, (5112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:20,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1518 states to 1518 states and 5112 transitions. [2021-06-05 16:55:20,488 INFO L78 Accepts]: Start accepts. Automaton has 1518 states and 5112 transitions. Word has length 27 [2021-06-05 16:55:20,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:20,489 INFO L482 AbstractCegarLoop]: Abstraction has 1518 states and 5112 transitions. [2021-06-05 16:55:20,489 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:20,489 INFO L276 IsEmpty]: Start isEmpty. Operand 1518 states and 5112 transitions. [2021-06-05 16:55:20,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 16:55:20,491 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:20,492 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:20,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2021-06-05 16:55:20,704 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:20,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:20,704 INFO L82 PathProgramCache]: Analyzing trace with hash 216767728, now seen corresponding path program 12 times [2021-06-05 16:55:20,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:20,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008326437] [2021-06-05 16:55:20,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:20,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:20,739 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:20,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:20,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008326437] [2021-06-05 16:55:20,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008326437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:20,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240492838] [2021-06-05 16:55:20,740 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:20,780 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:55:20,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:20,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:55:20,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:20,853 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:20,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240492838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:20,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:20,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 16:55:20,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314580676] [2021-06-05 16:55:20,855 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:55:20,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:20,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:55:20,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:55:20,855 INFO L87 Difference]: Start difference. First operand 1518 states and 5112 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:21,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:21,097 INFO L93 Difference]: Finished difference Result 2124 states and 6748 transitions. [2021-06-05 16:55:21,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 16:55:21,098 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 16:55:21,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:21,101 INFO L225 Difference]: With dead ends: 2124 [2021-06-05 16:55:21,101 INFO L226 Difference]: Without dead ends: 2112 [2021-06-05 16:55:21,101 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 147.8ms TimeCoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:55:21,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2112 states. [2021-06-05 16:55:21,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2112 to 1536. [2021-06-05 16:55:21,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1536 states, 1535 states have (on average 3.3674267100977198) internal successors, (5169), 1535 states have internal predecessors, (5169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:21,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1536 states to 1536 states and 5169 transitions. [2021-06-05 16:55:21,131 INFO L78 Accepts]: Start accepts. Automaton has 1536 states and 5169 transitions. Word has length 27 [2021-06-05 16:55:21,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:21,132 INFO L482 AbstractCegarLoop]: Abstraction has 1536 states and 5169 transitions. [2021-06-05 16:55:21,132 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:21,132 INFO L276 IsEmpty]: Start isEmpty. Operand 1536 states and 5169 transitions. [2021-06-05 16:55:21,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 16:55:21,135 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:21,135 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:21,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:21,349 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:21,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:21,349 INFO L82 PathProgramCache]: Analyzing trace with hash -670090772, now seen corresponding path program 4 times [2021-06-05 16:55:21,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:21,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585125620] [2021-06-05 16:55:21,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:21,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:21,373 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:21,373 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:21,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585125620] [2021-06-05 16:55:21,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585125620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:21,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043386476] [2021-06-05 16:55:21,374 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:21,397 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:55:21,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:21,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 16:55:21,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:21,462 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:21,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043386476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:21,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:21,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 16:55:21,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758445449] [2021-06-05 16:55:21,463 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:55:21,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:21,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:55:21,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:55:21,463 INFO L87 Difference]: Start difference. First operand 1536 states and 5169 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:21,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:21,720 INFO L93 Difference]: Finished difference Result 2332 states and 7312 transitions. [2021-06-05 16:55:21,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 16:55:21,720 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 16:55:21,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:21,723 INFO L225 Difference]: With dead ends: 2332 [2021-06-05 16:55:21,723 INFO L226 Difference]: Without dead ends: 2320 [2021-06-05 16:55:21,723 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 161.4ms TimeCoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:55:21,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2320 states. [2021-06-05 16:55:21,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2320 to 1566. [2021-06-05 16:55:21,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1566 states, 1565 states have (on average 3.375079872204473) internal successors, (5282), 1565 states have internal predecessors, (5282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:21,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1566 states to 1566 states and 5282 transitions. [2021-06-05 16:55:21,749 INFO L78 Accepts]: Start accepts. Automaton has 1566 states and 5282 transitions. Word has length 27 [2021-06-05 16:55:21,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:21,750 INFO L482 AbstractCegarLoop]: Abstraction has 1566 states and 5282 transitions. [2021-06-05 16:55:21,750 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:21,750 INFO L276 IsEmpty]: Start isEmpty. Operand 1566 states and 5282 transitions. [2021-06-05 16:55:21,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 16:55:21,753 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:21,753 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:21,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-06-05 16:55:21,969 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:21,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:21,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1401396460, now seen corresponding path program 5 times [2021-06-05 16:55:21,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:21,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784180978] [2021-06-05 16:55:21,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:21,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:21,996 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:21,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:21,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784180978] [2021-06-05 16:55:21,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784180978] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:21,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180378290] [2021-06-05 16:55:21,996 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:22,025 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:55:22,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:22,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 16:55:22,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:22,093 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:22,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180378290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:22,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:22,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 16:55:22,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754549368] [2021-06-05 16:55:22,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:55:22,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:22,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:55:22,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:55:22,094 INFO L87 Difference]: Start difference. First operand 1566 states and 5282 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:22,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:22,351 INFO L93 Difference]: Finished difference Result 2490 states and 7823 transitions. [2021-06-05 16:55:22,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 16:55:22,351 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 16:55:22,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:22,354 INFO L225 Difference]: With dead ends: 2490 [2021-06-05 16:55:22,354 INFO L226 Difference]: Without dead ends: 2490 [2021-06-05 16:55:22,354 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 173.5ms TimeCoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:55:22,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2490 states. [2021-06-05 16:55:22,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2490 to 1435. [2021-06-05 16:55:22,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1435 states, 1434 states have (on average 3.311715481171548) internal successors, (4749), 1434 states have internal predecessors, (4749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:22,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1435 states to 1435 states and 4749 transitions. [2021-06-05 16:55:22,377 INFO L78 Accepts]: Start accepts. Automaton has 1435 states and 4749 transitions. Word has length 27 [2021-06-05 16:55:22,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:22,377 INFO L482 AbstractCegarLoop]: Abstraction has 1435 states and 4749 transitions. [2021-06-05 16:55:22,377 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:22,378 INFO L276 IsEmpty]: Start isEmpty. Operand 1435 states and 4749 transitions. [2021-06-05 16:55:22,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 16:55:22,380 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:22,380 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:22,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-06-05 16:55:22,580 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:22,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:22,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1810785004, now seen corresponding path program 13 times [2021-06-05 16:55:22,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:22,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823782386] [2021-06-05 16:55:22,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:22,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:22,618 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:22,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:22,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823782386] [2021-06-05 16:55:22,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823782386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:22,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074019092] [2021-06-05 16:55:22,619 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:22,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:22,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:55:22,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:22,727 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:22,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074019092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:22,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:22,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 16:55:22,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296406295] [2021-06-05 16:55:22,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:55:22,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:22,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:55:22,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:55:22,728 INFO L87 Difference]: Start difference. First operand 1435 states and 4749 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:23,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:23,090 INFO L93 Difference]: Finished difference Result 2497 states and 7799 transitions. [2021-06-05 16:55:23,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 16:55:23,091 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 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 27 [2021-06-05 16:55:23,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:23,094 INFO L225 Difference]: With dead ends: 2497 [2021-06-05 16:55:23,094 INFO L226 Difference]: Without dead ends: 2497 [2021-06-05 16:55:23,094 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 206.2ms TimeCoverageRelationStatistics Valid=185, Invalid=517, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:55:23,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2497 states. [2021-06-05 16:55:23,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2497 to 1477. [2021-06-05 16:55:23,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1477 states, 1476 states have (on average 3.2981029810298104) internal successors, (4868), 1476 states have internal predecessors, (4868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:23,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1477 states to 1477 states and 4868 transitions. [2021-06-05 16:55:23,118 INFO L78 Accepts]: Start accepts. Automaton has 1477 states and 4868 transitions. Word has length 27 [2021-06-05 16:55:23,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:23,118 INFO L482 AbstractCegarLoop]: Abstraction has 1477 states and 4868 transitions. [2021-06-05 16:55:23,118 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:23,118 INFO L276 IsEmpty]: Start isEmpty. Operand 1477 states and 4868 transitions. [2021-06-05 16:55:23,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 16:55:23,120 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:23,120 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:23,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-06-05 16:55:23,321 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:23,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:23,321 INFO L82 PathProgramCache]: Analyzing trace with hash -168744536, now seen corresponding path program 14 times [2021-06-05 16:55:23,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:23,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767485216] [2021-06-05 16:55:23,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:23,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:23,358 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:23,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:23,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767485216] [2021-06-05 16:55:23,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767485216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:23,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805812124] [2021-06-05 16:55:23,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:23,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:55:23,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:23,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:55:23,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:23,479 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:23,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805812124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:23,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:23,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:55:23,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131158342] [2021-06-05 16:55:23,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:55:23,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:23,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:55:23,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:55:23,481 INFO L87 Difference]: Start difference. First operand 1477 states and 4868 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:24,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:24,003 INFO L93 Difference]: Finished difference Result 2724 states and 8387 transitions. [2021-06-05 16:55:24,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 16:55:24,004 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 16:55:24,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:24,007 INFO L225 Difference]: With dead ends: 2724 [2021-06-05 16:55:24,007 INFO L226 Difference]: Without dead ends: 2724 [2021-06-05 16:55:24,008 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 373.7ms TimeCoverageRelationStatistics Valid=412, Invalid=1394, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 16:55:24,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2724 states. [2021-06-05 16:55:24,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2724 to 1533. [2021-06-05 16:55:24,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1533 states, 1532 states have (on average 3.3015665796344646) internal successors, (5058), 1532 states have internal predecessors, (5058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:24,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1533 states to 1533 states and 5058 transitions. [2021-06-05 16:55:24,033 INFO L78 Accepts]: Start accepts. Automaton has 1533 states and 5058 transitions. Word has length 27 [2021-06-05 16:55:24,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:24,034 INFO L482 AbstractCegarLoop]: Abstraction has 1533 states and 5058 transitions. [2021-06-05 16:55:24,034 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:24,034 INFO L276 IsEmpty]: Start isEmpty. Operand 1533 states and 5058 transitions. [2021-06-05 16:55:24,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 16:55:24,036 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:24,036 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:24,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-06-05 16:55:24,236 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:24,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:24,237 INFO L82 PathProgramCache]: Analyzing trace with hash 563716900, now seen corresponding path program 15 times [2021-06-05 16:55:24,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:24,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821978197] [2021-06-05 16:55:24,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:24,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:24,276 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:24,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:24,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821978197] [2021-06-05 16:55:24,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821978197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:24,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920567266] [2021-06-05 16:55:24,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:24,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:55:24,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:24,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:55:24,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:24,384 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:24,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920567266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:24,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:24,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:55:24,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530138526] [2021-06-05 16:55:24,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:55:24,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:24,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:55:24,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:55:24,385 INFO L87 Difference]: Start difference. First operand 1533 states and 5058 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:24,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:24,801 INFO L93 Difference]: Finished difference Result 2582 states and 8017 transitions. [2021-06-05 16:55:24,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 16:55:24,801 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 16:55:24,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:24,805 INFO L225 Difference]: With dead ends: 2582 [2021-06-05 16:55:24,805 INFO L226 Difference]: Without dead ends: 2578 [2021-06-05 16:55:24,805 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 279.0ms TimeCoverageRelationStatistics Valid=295, Invalid=895, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 16:55:24,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2578 states. [2021-06-05 16:55:24,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2578 to 1487. [2021-06-05 16:55:24,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1487 states, 1486 states have (on average 3.2994616419919245) internal successors, (4903), 1486 states have internal predecessors, (4903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:24,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1487 states to 1487 states and 4903 transitions. [2021-06-05 16:55:24,826 INFO L78 Accepts]: Start accepts. Automaton has 1487 states and 4903 transitions. Word has length 27 [2021-06-05 16:55:24,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:24,826 INFO L482 AbstractCegarLoop]: Abstraction has 1487 states and 4903 transitions. [2021-06-05 16:55:24,826 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:24,826 INFO L276 IsEmpty]: Start isEmpty. Operand 1487 states and 4903 transitions. [2021-06-05 16:55:24,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 16:55:24,828 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:24,828 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:25,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:25,029 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:25,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:25,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1088595216, now seen corresponding path program 16 times [2021-06-05 16:55:25,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:25,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189172262] [2021-06-05 16:55:25,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:25,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:25,067 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:25,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:25,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189172262] [2021-06-05 16:55:25,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189172262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:25,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52885747] [2021-06-05 16:55:25,068 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:25,098 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:55:25,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:25,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:55:25,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:25,171 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:25,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52885747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:25,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:25,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 16:55:25,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011739781] [2021-06-05 16:55:25,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:55:25,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:25,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:55:25,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:55:25,172 INFO L87 Difference]: Start difference. First operand 1487 states and 4903 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:25,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:25,549 INFO L93 Difference]: Finished difference Result 2411 states and 7586 transitions. [2021-06-05 16:55:25,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 16:55:25,549 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 16:55:25,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:25,552 INFO L225 Difference]: With dead ends: 2411 [2021-06-05 16:55:25,552 INFO L226 Difference]: Without dead ends: 2411 [2021-06-05 16:55:25,552 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 232.5ms TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2021-06-05 16:55:25,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2411 states. [2021-06-05 16:55:25,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2411 to 1471. [2021-06-05 16:55:25,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1471 states, 1470 states have (on average 3.3081632653061224) internal successors, (4863), 1470 states have internal predecessors, (4863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:25,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1471 states to 1471 states and 4863 transitions. [2021-06-05 16:55:25,573 INFO L78 Accepts]: Start accepts. Automaton has 1471 states and 4863 transitions. Word has length 27 [2021-06-05 16:55:25,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:25,573 INFO L482 AbstractCegarLoop]: Abstraction has 1471 states and 4863 transitions. [2021-06-05 16:55:25,573 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:25,573 INFO L276 IsEmpty]: Start isEmpty. Operand 1471 states and 4863 transitions. [2021-06-05 16:55:25,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 16:55:25,575 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:25,575 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:25,775 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-06-05 16:55:25,775 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:25,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:25,776 INFO L82 PathProgramCache]: Analyzing trace with hash 1331852852, now seen corresponding path program 6 times [2021-06-05 16:55:25,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:25,776 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259103301] [2021-06-05 16:55:25,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:25,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:25,804 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:25,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:25,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259103301] [2021-06-05 16:55:25,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259103301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:25,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651102603] [2021-06-05 16:55:25,805 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:25,847 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 16:55:25,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:25,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 16:55:25,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:25,921 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:25,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651102603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:25,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:25,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 16:55:25,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488055723] [2021-06-05 16:55:25,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:55:25,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:25,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:55:25,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:55:25,922 INFO L87 Difference]: Start difference. First operand 1471 states and 4863 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:26,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:26,132 INFO L93 Difference]: Finished difference Result 1987 states and 6138 transitions. [2021-06-05 16:55:26,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 16:55:26,133 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 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 27 [2021-06-05 16:55:26,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:26,135 INFO L225 Difference]: With dead ends: 1987 [2021-06-05 16:55:26,135 INFO L226 Difference]: Without dead ends: 1975 [2021-06-05 16:55:26,136 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 140.1ms TimeCoverageRelationStatistics Valid=148, Invalid=358, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:55:26,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1975 states. [2021-06-05 16:55:26,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1975 to 1462. [2021-06-05 16:55:26,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1462 states, 1461 states have (on average 3.308008213552361) internal successors, (4833), 1461 states have internal predecessors, (4833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:26,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1462 states to 1462 states and 4833 transitions. [2021-06-05 16:55:26,158 INFO L78 Accepts]: Start accepts. Automaton has 1462 states and 4833 transitions. Word has length 27 [2021-06-05 16:55:26,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:26,158 INFO L482 AbstractCegarLoop]: Abstraction has 1462 states and 4833 transitions. [2021-06-05 16:55:26,158 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:26,158 INFO L276 IsEmpty]: Start isEmpty. Operand 1462 states and 4833 transitions. [2021-06-05 16:55:26,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 16:55:26,160 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:26,160 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:26,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-06-05 16:55:26,361 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:26,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:26,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1010707988, now seen corresponding path program 7 times [2021-06-05 16:55:26,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:26,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337837622] [2021-06-05 16:55:26,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:26,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:26,394 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:26,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:26,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337837622] [2021-06-05 16:55:26,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337837622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:26,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932755731] [2021-06-05 16:55:26,395 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:26,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:26,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 16:55:26,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:26,513 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:26,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932755731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:26,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:26,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 16:55:26,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372265523] [2021-06-05 16:55:26,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:55:26,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:26,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:55:26,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:55:26,514 INFO L87 Difference]: Start difference. First operand 1462 states and 4833 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:26,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:26,743 INFO L93 Difference]: Finished difference Result 1951 states and 6027 transitions. [2021-06-05 16:55:26,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 16:55:26,744 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 16:55:26,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:26,746 INFO L225 Difference]: With dead ends: 1951 [2021-06-05 16:55:26,746 INFO L226 Difference]: Without dead ends: 1923 [2021-06-05 16:55:26,747 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 145.7ms TimeCoverageRelationStatistics Valid=148, Invalid=358, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:55:26,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1923 states. [2021-06-05 16:55:26,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1923 to 1463. [2021-06-05 16:55:26,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1463 states, 1462 states have (on average 3.3071135430916554) internal successors, (4835), 1462 states have internal predecessors, (4835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:26,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1463 states to 1463 states and 4835 transitions. [2021-06-05 16:55:26,768 INFO L78 Accepts]: Start accepts. Automaton has 1463 states and 4835 transitions. Word has length 27 [2021-06-05 16:55:26,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:26,768 INFO L482 AbstractCegarLoop]: Abstraction has 1463 states and 4835 transitions. [2021-06-05 16:55:26,768 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:26,768 INFO L276 IsEmpty]: Start isEmpty. Operand 1463 states and 4835 transitions. [2021-06-05 16:55:26,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 16:55:26,771 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:26,771 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:26,971 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:26,971 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:26,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:26,972 INFO L82 PathProgramCache]: Analyzing trace with hash 1924122076, now seen corresponding path program 8 times [2021-06-05 16:55:26,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:26,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689361490] [2021-06-05 16:55:26,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:26,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:26,997 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:26,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:26,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689361490] [2021-06-05 16:55:26,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689361490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:26,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928265244] [2021-06-05 16:55:26,997 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:27,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:55:27,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:27,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 16:55:27,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:27,081 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:27,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928265244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:27,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:27,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 16:55:27,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683534471] [2021-06-05 16:55:27,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 16:55:27,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:27,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 16:55:27,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 16:55:27,082 INFO L87 Difference]: Start difference. First operand 1463 states and 4835 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:27,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:27,288 INFO L93 Difference]: Finished difference Result 2417 states and 7513 transitions. [2021-06-05 16:55:27,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 16:55:27,288 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 16:55:27,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:27,291 INFO L225 Difference]: With dead ends: 2417 [2021-06-05 16:55:27,291 INFO L226 Difference]: Without dead ends: 2417 [2021-06-05 16:55:27,292 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 130.3ms TimeCoverageRelationStatistics Valid=130, Invalid=290, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:55:27,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2417 states. [2021-06-05 16:55:27,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2417 to 1487. [2021-06-05 16:55:27,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1487 states, 1486 states have (on average 3.3250336473755047) internal successors, (4941), 1486 states have internal predecessors, (4941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:27,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1487 states to 1487 states and 4941 transitions. [2021-06-05 16:55:27,316 INFO L78 Accepts]: Start accepts. Automaton has 1487 states and 4941 transitions. Word has length 27 [2021-06-05 16:55:27,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:27,316 INFO L482 AbstractCegarLoop]: Abstraction has 1487 states and 4941 transitions. [2021-06-05 16:55:27,316 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:27,316 INFO L276 IsEmpty]: Start isEmpty. Operand 1487 states and 4941 transitions. [2021-06-05 16:55:27,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 16:55:27,319 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:27,319 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:27,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:27,521 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:27,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:27,521 INFO L82 PathProgramCache]: Analyzing trace with hash -782245740, now seen corresponding path program 9 times [2021-06-05 16:55:27,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:27,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130939923] [2021-06-05 16:55:27,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:27,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:27,550 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:27,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:27,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130939923] [2021-06-05 16:55:27,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130939923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:27,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900074301] [2021-06-05 16:55:27,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:27,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 16:55:27,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:27,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 16:55:27,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:27,646 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:27,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900074301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:27,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:27,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 16:55:27,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363346176] [2021-06-05 16:55:27,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 16:55:27,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:27,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 16:55:27,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 16:55:27,647 INFO L87 Difference]: Start difference. First operand 1487 states and 4941 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:27,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:27,862 INFO L93 Difference]: Finished difference Result 2191 states and 6835 transitions. [2021-06-05 16:55:27,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 16:55:27,863 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 16:55:27,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:27,866 INFO L225 Difference]: With dead ends: 2191 [2021-06-05 16:55:27,866 INFO L226 Difference]: Without dead ends: 2170 [2021-06-05 16:55:27,866 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 126.1ms TimeCoverageRelationStatistics Valid=130, Invalid=290, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:55:27,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2170 states. [2021-06-05 16:55:27,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2170 to 1487. [2021-06-05 16:55:27,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1487 states, 1486 states have (on average 3.319650067294751) internal successors, (4933), 1486 states have internal predecessors, (4933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:27,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1487 states to 1487 states and 4933 transitions. [2021-06-05 16:55:27,887 INFO L78 Accepts]: Start accepts. Automaton has 1487 states and 4933 transitions. Word has length 27 [2021-06-05 16:55:27,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:27,887 INFO L482 AbstractCegarLoop]: Abstraction has 1487 states and 4933 transitions. [2021-06-05 16:55:27,887 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:27,887 INFO L276 IsEmpty]: Start isEmpty. Operand 1487 states and 4933 transitions. [2021-06-05 16:55:27,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 16:55:27,889 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:27,890 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:28,090 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:28,090 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:28,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:28,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1171437904, now seen corresponding path program 10 times [2021-06-05 16:55:28,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:28,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800061743] [2021-06-05 16:55:28,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:28,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:28,123 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:28,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:28,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800061743] [2021-06-05 16:55:28,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800061743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:28,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960030592] [2021-06-05 16:55:28,124 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:28,157 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:55:28,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:28,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 16:55:28,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:28,220 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:28,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960030592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:28,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:28,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 16:55:28,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454355450] [2021-06-05 16:55:28,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:55:28,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:28,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:55:28,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:55:28,221 INFO L87 Difference]: Start difference. First operand 1487 states and 4933 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:28,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:28,377 INFO L93 Difference]: Finished difference Result 1790 states and 5786 transitions. [2021-06-05 16:55:28,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 16:55:28,377 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 16:55:28,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:28,380 INFO L225 Difference]: With dead ends: 1790 [2021-06-05 16:55:28,380 INFO L226 Difference]: Without dead ends: 1790 [2021-06-05 16:55:28,380 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 105.1ms TimeCoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:55:28,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1790 states. [2021-06-05 16:55:28,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1790 to 1467. [2021-06-05 16:55:28,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1467 states, 1466 states have (on average 3.319918144611187) internal successors, (4867), 1466 states have internal predecessors, (4867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:28,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1467 states to 1467 states and 4867 transitions. [2021-06-05 16:55:28,400 INFO L78 Accepts]: Start accepts. Automaton has 1467 states and 4867 transitions. Word has length 27 [2021-06-05 16:55:28,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:28,401 INFO L482 AbstractCegarLoop]: Abstraction has 1467 states and 4867 transitions. [2021-06-05 16:55:28,401 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:28,401 INFO L276 IsEmpty]: Start isEmpty. Operand 1467 states and 4867 transitions. [2021-06-05 16:55:28,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 16:55:28,403 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:28,403 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:28,603 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable121 [2021-06-05 16:55:28,603 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:28,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:28,604 INFO L82 PathProgramCache]: Analyzing trace with hash -2112049896, now seen corresponding path program 11 times [2021-06-05 16:55:28,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:28,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811330068] [2021-06-05 16:55:28,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:28,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:28,629 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:28,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:28,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811330068] [2021-06-05 16:55:28,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811330068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:28,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662518052] [2021-06-05 16:55:28,629 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:28,653 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:55:28,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:28,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 16:55:28,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:28,707 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:28,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662518052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:28,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:28,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 16:55:28,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949043280] [2021-06-05 16:55:28,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 16:55:28,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:28,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 16:55:28,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 16:55:28,708 INFO L87 Difference]: Start difference. First operand 1467 states and 4867 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:28,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:28,904 INFO L93 Difference]: Finished difference Result 2556 states and 8173 transitions. [2021-06-05 16:55:28,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 16:55:28,904 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 16:55:28,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:28,907 INFO L225 Difference]: With dead ends: 2556 [2021-06-05 16:55:28,907 INFO L226 Difference]: Without dead ends: 2556 [2021-06-05 16:55:28,907 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 83.2ms TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:55:28,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2556 states. [2021-06-05 16:55:28,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2556 to 1719. [2021-06-05 16:55:28,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1719 states, 1718 states have (on average 3.3963911525029102) internal successors, (5835), 1718 states have internal predecessors, (5835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:28,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1719 states to 1719 states and 5835 transitions. [2021-06-05 16:55:28,954 INFO L78 Accepts]: Start accepts. Automaton has 1719 states and 5835 transitions. Word has length 27 [2021-06-05 16:55:28,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:28,954 INFO L482 AbstractCegarLoop]: Abstraction has 1719 states and 5835 transitions. [2021-06-05 16:55:28,954 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:28,954 INFO L276 IsEmpty]: Start isEmpty. Operand 1719 states and 5835 transitions. [2021-06-05 16:55:28,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 16:55:28,958 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:28,958 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:29,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-06-05 16:55:29,181 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:29,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:29,181 INFO L82 PathProgramCache]: Analyzing trace with hash -523450416, now seen corresponding path program 12 times [2021-06-05 16:55:29,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:29,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147223016] [2021-06-05 16:55:29,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:29,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:29,212 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:29,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:29,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147223016] [2021-06-05 16:55:29,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147223016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:29,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992844262] [2021-06-05 16:55:29,213 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:29,258 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 16:55:29,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:29,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 16:55:29,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:29,312 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:29,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992844262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:29,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:29,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 16:55:29,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530764444] [2021-06-05 16:55:29,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 16:55:29,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:29,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 16:55:29,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 16:55:29,313 INFO L87 Difference]: Start difference. First operand 1719 states and 5835 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:29,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:29,504 INFO L93 Difference]: Finished difference Result 2232 states and 7209 transitions. [2021-06-05 16:55:29,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 16:55:29,504 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 16:55:29,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:29,507 INFO L225 Difference]: With dead ends: 2232 [2021-06-05 16:55:29,507 INFO L226 Difference]: Without dead ends: 2211 [2021-06-05 16:55:29,507 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 84.4ms TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:55:29,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2211 states. [2021-06-05 16:55:29,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2211 to 1686. [2021-06-05 16:55:29,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1686 states, 1685 states have (on average 3.399406528189911) internal successors, (5728), 1685 states have internal predecessors, (5728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:29,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1686 states to 1686 states and 5728 transitions. [2021-06-05 16:55:29,534 INFO L78 Accepts]: Start accepts. Automaton has 1686 states and 5728 transitions. Word has length 27 [2021-06-05 16:55:29,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:29,534 INFO L482 AbstractCegarLoop]: Abstraction has 1686 states and 5728 transitions. [2021-06-05 16:55:29,534 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:29,534 INFO L276 IsEmpty]: Start isEmpty. Operand 1686 states and 5728 transitions. [2021-06-05 16:55:29,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 16:55:29,537 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:29,537 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:29,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-06-05 16:55:29,737 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:29,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:29,738 INFO L82 PathProgramCache]: Analyzing trace with hash 1318431600, now seen corresponding path program 17 times [2021-06-05 16:55:29,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:29,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556262550] [2021-06-05 16:55:29,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:29,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:29,768 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:29,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:29,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556262550] [2021-06-05 16:55:29,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556262550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:29,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033207331] [2021-06-05 16:55:29,768 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:29,791 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:55:29,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:29,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:55:29,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:29,883 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:29,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033207331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:29,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:29,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:55:29,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523652762] [2021-06-05 16:55:29,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:55:29,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:29,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:55:29,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:55:29,884 INFO L87 Difference]: Start difference. First operand 1686 states and 5728 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:30,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:30,440 INFO L93 Difference]: Finished difference Result 3478 states and 10820 transitions. [2021-06-05 16:55:30,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 16:55:30,440 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 16:55:30,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:30,445 INFO L225 Difference]: With dead ends: 3478 [2021-06-05 16:55:30,445 INFO L226 Difference]: Without dead ends: 3478 [2021-06-05 16:55:30,445 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 635 ImplicationChecksByTransitivity, 358.9ms TimeCoverageRelationStatistics Valid=445, Invalid=1535, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 16:55:30,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3478 states. [2021-06-05 16:55:30,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3478 to 1866. [2021-06-05 16:55:30,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1866 states, 1865 states have (on average 3.4428954423592493) internal successors, (6421), 1865 states have internal predecessors, (6421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:30,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1866 states to 1866 states and 6421 transitions. [2021-06-05 16:55:30,486 INFO L78 Accepts]: Start accepts. Automaton has 1866 states and 6421 transitions. Word has length 27 [2021-06-05 16:55:30,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:30,486 INFO L482 AbstractCegarLoop]: Abstraction has 1866 states and 6421 transitions. [2021-06-05 16:55:30,486 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:30,486 INFO L276 IsEmpty]: Start isEmpty. Operand 1866 states and 6421 transitions. [2021-06-05 16:55:30,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 16:55:30,490 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:30,490 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:30,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-06-05 16:55:30,705 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:30,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:30,705 INFO L82 PathProgramCache]: Analyzing trace with hash 2050893036, now seen corresponding path program 18 times [2021-06-05 16:55:30,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:30,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289777032] [2021-06-05 16:55:30,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:30,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:30,736 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:30,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:30,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289777032] [2021-06-05 16:55:30,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289777032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:30,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251915067] [2021-06-05 16:55:30,737 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:30,760 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:55:30,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:30,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:55:30,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:30,838 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:30,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251915067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:30,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:30,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:55:30,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224084397] [2021-06-05 16:55:30,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:55:30,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:30,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:55:30,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:55:30,839 INFO L87 Difference]: Start difference. First operand 1866 states and 6421 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:31,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:31,281 INFO L93 Difference]: Finished difference Result 3323 states and 10443 transitions. [2021-06-05 16:55:31,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 16:55:31,281 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 16:55:31,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:31,286 INFO L225 Difference]: With dead ends: 3323 [2021-06-05 16:55:31,286 INFO L226 Difference]: Without dead ends: 3319 [2021-06-05 16:55:31,286 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 261.7ms TimeCoverageRelationStatistics Valid=313, Invalid=1093, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 16:55:31,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3319 states. [2021-06-05 16:55:31,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3319 to 1834. [2021-06-05 16:55:31,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1834 states, 1833 states have (on average 3.4451718494271684) internal successors, (6315), 1833 states have internal predecessors, (6315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:31,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1834 states to 1834 states and 6315 transitions. [2021-06-05 16:55:31,318 INFO L78 Accepts]: Start accepts. Automaton has 1834 states and 6315 transitions. Word has length 27 [2021-06-05 16:55:31,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:31,318 INFO L482 AbstractCegarLoop]: Abstraction has 1834 states and 6315 transitions. [2021-06-05 16:55:31,318 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:31,318 INFO L276 IsEmpty]: Start isEmpty. Operand 1834 states and 6315 transitions. [2021-06-05 16:55:31,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 16:55:31,321 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:31,321 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:31,521 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-06-05 16:55:31,521 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:31,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:31,522 INFO L82 PathProgramCache]: Analyzing trace with hash -173194000, now seen corresponding path program 19 times [2021-06-05 16:55:31,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:31,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060495234] [2021-06-05 16:55:31,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:31,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:31,552 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:31,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:31,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060495234] [2021-06-05 16:55:31,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060495234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:31,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107988852] [2021-06-05 16:55:31,553 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:31,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:31,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:55:31,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:31,649 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:31,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107988852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:31,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:31,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 16:55:31,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142523544] [2021-06-05 16:55:31,649 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:55:31,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:31,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:55:31,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:55:31,650 INFO L87 Difference]: Start difference. First operand 1834 states and 6315 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:32,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:32,029 INFO L93 Difference]: Finished difference Result 3041 states and 9730 transitions. [2021-06-05 16:55:32,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 16:55:32,030 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 16:55:32,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:32,034 INFO L225 Difference]: With dead ends: 3041 [2021-06-05 16:55:32,034 INFO L226 Difference]: Without dead ends: 3029 [2021-06-05 16:55:32,034 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 249.4ms TimeCoverageRelationStatistics Valid=248, Invalid=808, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:55:32,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3029 states. [2021-06-05 16:55:32,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3029 to 1816. [2021-06-05 16:55:32,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1816 states, 1815 states have (on average 3.4512396694214877) internal successors, (6264), 1815 states have internal predecessors, (6264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:32,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1816 states to 1816 states and 6264 transitions. [2021-06-05 16:55:32,065 INFO L78 Accepts]: Start accepts. Automaton has 1816 states and 6264 transitions. Word has length 27 [2021-06-05 16:55:32,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:32,065 INFO L482 AbstractCegarLoop]: Abstraction has 1816 states and 6264 transitions. [2021-06-05 16:55:32,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:32,065 INFO L276 IsEmpty]: Start isEmpty. Operand 1816 states and 6264 transitions. [2021-06-05 16:55:32,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 16:55:32,067 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:32,067 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:32,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:32,268 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:32,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:32,268 INFO L82 PathProgramCache]: Analyzing trace with hash 2106791024, now seen corresponding path program 20 times [2021-06-05 16:55:32,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:32,268 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318382680] [2021-06-05 16:55:32,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:32,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:32,301 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:32,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:32,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318382680] [2021-06-05 16:55:32,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318382680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:32,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871070156] [2021-06-05 16:55:32,302 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:32,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:55:32,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:32,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:55:32,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:32,415 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:55:32,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871070156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:32,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:32,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-06-05 16:55:32,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188298798] [2021-06-05 16:55:32,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:55:32,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:32,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:55:32,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:55:32,416 INFO L87 Difference]: Start difference. First operand 1816 states and 6264 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:32,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:32,919 INFO L93 Difference]: Finished difference Result 4165 states and 13261 transitions. [2021-06-05 16:55:32,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 16:55:32,919 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 16:55:32,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:32,925 INFO L225 Difference]: With dead ends: 4165 [2021-06-05 16:55:32,925 INFO L226 Difference]: Without dead ends: 4165 [2021-06-05 16:55:32,925 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 319.4ms TimeCoverageRelationStatistics Valid=451, Invalid=1355, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 16:55:32,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4165 states. [2021-06-05 16:55:32,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4165 to 2008. [2021-06-05 16:55:32,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2008 states, 2007 states have (on average 3.5366218236173395) internal successors, (7098), 2007 states have internal predecessors, (7098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:32,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2008 states to 2008 states and 7098 transitions. [2021-06-05 16:55:32,963 INFO L78 Accepts]: Start accepts. Automaton has 2008 states and 7098 transitions. Word has length 27 [2021-06-05 16:55:32,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:32,963 INFO L482 AbstractCegarLoop]: Abstraction has 2008 states and 7098 transitions. [2021-06-05 16:55:32,963 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:32,963 INFO L276 IsEmpty]: Start isEmpty. Operand 2008 states and 7098 transitions. [2021-06-05 16:55:32,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 16:55:32,965 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:32,966 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:33,166 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-06-05 16:55:33,166 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:33,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:33,167 INFO L82 PathProgramCache]: Analyzing trace with hash -729353744, now seen corresponding path program 21 times [2021-06-05 16:55:33,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:33,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234590815] [2021-06-05 16:55:33,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:33,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:33,199 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:33,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:33,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234590815] [2021-06-05 16:55:33,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234590815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:33,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457659739] [2021-06-05 16:55:33,199 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:33,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:55:33,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:33,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:55:33,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:33,297 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:55:33,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457659739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:33,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:33,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-06-05 16:55:33,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076115909] [2021-06-05 16:55:33,298 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:55:33,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:33,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:55:33,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:55:33,299 INFO L87 Difference]: Start difference. First operand 2008 states and 7098 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:33,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:33,829 INFO L93 Difference]: Finished difference Result 4184 states and 13322 transitions. [2021-06-05 16:55:33,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 16:55:33,830 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 16:55:33,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:33,836 INFO L225 Difference]: With dead ends: 4184 [2021-06-05 16:55:33,836 INFO L226 Difference]: Without dead ends: 4184 [2021-06-05 16:55:33,837 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 314.5ms TimeCoverageRelationStatistics Valid=451, Invalid=1355, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 16:55:33,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4184 states. [2021-06-05 16:55:33,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4184 to 2009. [2021-06-05 16:55:33,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2009 states, 2008 states have (on average 3.5328685258964145) internal successors, (7094), 2008 states have internal predecessors, (7094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:33,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2009 states to 2009 states and 7094 transitions. [2021-06-05 16:55:33,881 INFO L78 Accepts]: Start accepts. Automaton has 2009 states and 7094 transitions. Word has length 27 [2021-06-05 16:55:33,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:33,881 INFO L482 AbstractCegarLoop]: Abstraction has 2009 states and 7094 transitions. [2021-06-05 16:55:33,881 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:33,881 INFO L276 IsEmpty]: Start isEmpty. Operand 2009 states and 7094 transitions. [2021-06-05 16:55:33,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 16:55:33,883 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:33,883 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:34,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-06-05 16:55:34,084 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:34,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:34,084 INFO L82 PathProgramCache]: Analyzing trace with hash 21775592, now seen corresponding path program 22 times [2021-06-05 16:55:34,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:34,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626900582] [2021-06-05 16:55:34,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:34,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:34,113 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:34,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:34,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626900582] [2021-06-05 16:55:34,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626900582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:34,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117183354] [2021-06-05 16:55:34,114 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:34,136 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:55:34,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:34,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:55:34,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:34,197 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:55:34,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117183354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:34,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:34,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-06-05 16:55:34,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360318939] [2021-06-05 16:55:34,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:55:34,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:34,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:55:34,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:55:34,198 INFO L87 Difference]: Start difference. First operand 2009 states and 7094 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:34,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:34,590 INFO L93 Difference]: Finished difference Result 3911 states and 12446 transitions. [2021-06-05 16:55:34,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 16:55:34,591 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 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 27 [2021-06-05 16:55:34,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:34,596 INFO L225 Difference]: With dead ends: 3911 [2021-06-05 16:55:34,597 INFO L226 Difference]: Without dead ends: 3907 [2021-06-05 16:55:34,597 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 211.1ms TimeCoverageRelationStatistics Valid=268, Invalid=854, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 16:55:34,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3907 states. [2021-06-05 16:55:34,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3907 to 2031. [2021-06-05 16:55:34,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2031 states, 2030 states have (on average 3.531527093596059) internal successors, (7169), 2030 states have internal predecessors, (7169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:34,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2031 states to 2031 states and 7169 transitions. [2021-06-05 16:55:34,644 INFO L78 Accepts]: Start accepts. Automaton has 2031 states and 7169 transitions. Word has length 27 [2021-06-05 16:55:34,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:34,644 INFO L482 AbstractCegarLoop]: Abstraction has 2031 states and 7169 transitions. [2021-06-05 16:55:34,644 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:34,644 INFO L276 IsEmpty]: Start isEmpty. Operand 2031 states and 7169 transitions. [2021-06-05 16:55:34,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 16:55:34,647 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:34,647 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:34,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-06-05 16:55:34,849 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:34,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:34,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1000333036, now seen corresponding path program 23 times [2021-06-05 16:55:34,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:34,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214003448] [2021-06-05 16:55:34,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:34,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:34,881 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:34,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:34,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214003448] [2021-06-05 16:55:34,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214003448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:34,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823938577] [2021-06-05 16:55:34,882 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:34,904 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:55:34,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:34,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:55:34,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:34,966 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:55:34,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823938577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:34,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:34,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-06-05 16:55:34,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550435244] [2021-06-05 16:55:34,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:55:34,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:34,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:55:34,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:55:34,968 INFO L87 Difference]: Start difference. First operand 2031 states and 7169 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:35,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:35,427 INFO L93 Difference]: Finished difference Result 4058 states and 12788 transitions. [2021-06-05 16:55:35,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 16:55:35,428 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 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 27 [2021-06-05 16:55:35,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:35,434 INFO L225 Difference]: With dead ends: 4058 [2021-06-05 16:55:35,434 INFO L226 Difference]: Without dead ends: 4058 [2021-06-05 16:55:35,434 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 260.8ms TimeCoverageRelationStatistics Valid=345, Invalid=1061, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 16:55:35,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4058 states. [2021-06-05 16:55:35,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4058 to 2015. [2021-06-05 16:55:35,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2015 states, 2014 states have (on average 3.5307845084409135) internal successors, (7111), 2014 states have internal predecessors, (7111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:35,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2015 states to 2015 states and 7111 transitions. [2021-06-05 16:55:35,472 INFO L78 Accepts]: Start accepts. Automaton has 2015 states and 7111 transitions. Word has length 27 [2021-06-05 16:55:35,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:35,472 INFO L482 AbstractCegarLoop]: Abstraction has 2015 states and 7111 transitions. [2021-06-05 16:55:35,473 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:35,473 INFO L276 IsEmpty]: Start isEmpty. Operand 2015 states and 7111 transitions. [2021-06-05 16:55:35,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 16:55:35,476 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:35,476 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:35,690 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:35,691 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:35,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:35,691 INFO L82 PathProgramCache]: Analyzing trace with hash 646145264, now seen corresponding path program 24 times [2021-06-05 16:55:35,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:35,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603374876] [2021-06-05 16:55:35,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:35,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:35,728 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:35,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:35,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603374876] [2021-06-05 16:55:35,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603374876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:35,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121779260] [2021-06-05 16:55:35,728 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:35,767 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:55:35,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:35,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:55:35,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:35,829 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:35,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121779260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:35,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:35,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 16:55:35,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792675470] [2021-06-05 16:55:35,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:55:35,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:35,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:55:35,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:55:35,830 INFO L87 Difference]: Start difference. First operand 2015 states and 7111 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:36,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:36,178 INFO L93 Difference]: Finished difference Result 3346 states and 10911 transitions. [2021-06-05 16:55:36,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 16:55:36,178 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 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 27 [2021-06-05 16:55:36,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:36,183 INFO L225 Difference]: With dead ends: 3346 [2021-06-05 16:55:36,183 INFO L226 Difference]: Without dead ends: 3334 [2021-06-05 16:55:36,183 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 204.2ms TimeCoverageRelationStatistics Valid=220, Invalid=710, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:55:36,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3334 states. [2021-06-05 16:55:36,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3334 to 2049. [2021-06-05 16:55:36,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2049 states, 2048 states have (on average 3.5244140625) internal successors, (7218), 2048 states have internal predecessors, (7218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:36,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2049 states to 2049 states and 7218 transitions. [2021-06-05 16:55:36,221 INFO L78 Accepts]: Start accepts. Automaton has 2049 states and 7218 transitions. Word has length 27 [2021-06-05 16:55:36,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:36,221 INFO L482 AbstractCegarLoop]: Abstraction has 2049 states and 7218 transitions. [2021-06-05 16:55:36,221 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:36,221 INFO L276 IsEmpty]: Start isEmpty. Operand 2049 states and 7218 transitions. [2021-06-05 16:55:36,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 16:55:36,224 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:36,224 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:36,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:36,425 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:36,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:36,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1567847404, now seen corresponding path program 25 times [2021-06-05 16:55:36,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:36,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664308753] [2021-06-05 16:55:36,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:36,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:36,474 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:36,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:36,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664308753] [2021-06-05 16:55:36,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664308753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:36,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597972188] [2021-06-05 16:55:36,474 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:36,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:36,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:55:36,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:36,561 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:36,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597972188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:36,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:36,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 16:55:36,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018132975] [2021-06-05 16:55:36,561 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:55:36,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:36,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:55:36,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:55:36,562 INFO L87 Difference]: Start difference. First operand 2049 states and 7218 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:36,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:36,956 INFO L93 Difference]: Finished difference Result 3635 states and 11672 transitions. [2021-06-05 16:55:36,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 16:55:36,957 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 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 27 [2021-06-05 16:55:36,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:36,963 INFO L225 Difference]: With dead ends: 3635 [2021-06-05 16:55:36,963 INFO L226 Difference]: Without dead ends: 3631 [2021-06-05 16:55:36,963 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 237.8ms TimeCoverageRelationStatistics Valid=279, Invalid=981, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 16:55:36,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3631 states. [2021-06-05 16:55:36,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3631 to 2132. [2021-06-05 16:55:36,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2132 states, 2131 states have (on average 3.5152510558423273) internal successors, (7491), 2131 states have internal predecessors, (7491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:37,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2132 states to 2132 states and 7491 transitions. [2021-06-05 16:55:37,002 INFO L78 Accepts]: Start accepts. Automaton has 2132 states and 7491 transitions. Word has length 27 [2021-06-05 16:55:37,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:37,002 INFO L482 AbstractCegarLoop]: Abstraction has 2132 states and 7491 transitions. [2021-06-05 16:55:37,002 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:37,002 INFO L276 IsEmpty]: Start isEmpty. Operand 2132 states and 7491 transitions. [2021-06-05 16:55:37,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 16:55:37,005 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:37,005 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:37,205 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:37,205 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:37,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:37,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1748562448, now seen corresponding path program 26 times [2021-06-05 16:55:37,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:37,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155229305] [2021-06-05 16:55:37,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:37,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:37,239 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:37,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:37,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155229305] [2021-06-05 16:55:37,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155229305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:37,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140689217] [2021-06-05 16:55:37,239 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:37,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:55:37,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:37,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:55:37,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:37,327 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:37,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140689217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:37,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:37,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 16:55:37,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376638657] [2021-06-05 16:55:37,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:55:37,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:37,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:55:37,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:55:37,328 INFO L87 Difference]: Start difference. First operand 2132 states and 7491 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:37,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:37,820 INFO L93 Difference]: Finished difference Result 3810 states and 12119 transitions. [2021-06-05 16:55:37,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 16:55:37,821 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 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 27 [2021-06-05 16:55:37,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:37,826 INFO L225 Difference]: With dead ends: 3810 [2021-06-05 16:55:37,826 INFO L226 Difference]: Without dead ends: 3810 [2021-06-05 16:55:37,826 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 286.9ms TimeCoverageRelationStatistics Valid=392, Invalid=1330, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 16:55:37,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3810 states. [2021-06-05 16:55:37,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3810 to 2086. [2021-06-05 16:55:37,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2086 states, 2085 states have (on average 3.51462829736211) internal successors, (7328), 2085 states have internal predecessors, (7328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:37,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2086 states to 2086 states and 7328 transitions. [2021-06-05 16:55:37,860 INFO L78 Accepts]: Start accepts. Automaton has 2086 states and 7328 transitions. Word has length 27 [2021-06-05 16:55:37,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:37,860 INFO L482 AbstractCegarLoop]: Abstraction has 2086 states and 7328 transitions. [2021-06-05 16:55:37,860 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:37,860 INFO L276 IsEmpty]: Start isEmpty. Operand 2086 states and 7328 transitions. [2021-06-05 16:55:37,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 16:55:37,863 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:37,863 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:38,063 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-06-05 16:55:38,063 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:38,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:38,064 INFO L82 PathProgramCache]: Analyzing trace with hash -2115287982, now seen corresponding path program 29 times [2021-06-05 16:55:38,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:38,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687575660] [2021-06-05 16:55:38,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:38,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:38,634 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:38,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:38,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687575660] [2021-06-05 16:55:38,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687575660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:38,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138603273] [2021-06-05 16:55:38,634 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:38,658 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:55:38,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:38,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 16:55:38,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:09,398 WARN L205 SmtUtils]: Spent 30.27 s on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2021-06-05 16:56:09,766 INFO L446 ElimStorePlain]: Different costs {5=[v_prenex_15], 7=[A, v_prenex_25, v_prenex_17], 9=[v_prenex_23], 12=[v_prenex_19, v_prenex_21, v_prenex_20, v_prenex_14, v_prenex_13]} [2021-06-05 16:56:09,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:56:09,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:56:09,802 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:56:09,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 35 [2021-06-05 16:56:09,815 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:56:10,019 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-06-05 16:56:10,021 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:56:10,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:56:10,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:56:10,065 INFO L354 Elim1Store]: treesize reduction 26, result has 44.7 percent of original size [2021-06-05 16:56:10,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 24 treesize of output 30 [2021-06-05 16:56:10,068 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:56:10,244 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2021-06-05 16:56:10,244 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:56:10,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:56:10,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:56:10,280 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:56:10,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 24 treesize of output 56 [2021-06-05 16:56:10,334 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:56:10,522 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2021-06-05 16:56:10,522 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:56:10,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:56:10,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:56:10,580 INFO L354 Elim1Store]: treesize reduction 12, result has 74.5 percent of original size [2021-06-05 16:56:10,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 24 treesize of output 44 [2021-06-05 16:56:10,591 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:56:10,751 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2021-06-05 16:56:10,751 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:56:10,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:56:10,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:56:10,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:56:10,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:56:10,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:56:10,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:56:10,783 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-05 16:56:10,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 26 [2021-06-05 16:56:10,786 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:56:10,925 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2021-06-05 16:56:10,926 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:56:10,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:56:10,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:56:10,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:56:10,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:56:10,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:56:10,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:56:10,981 INFO L354 Elim1Store]: treesize reduction 12, result has 78.9 percent of original size [2021-06-05 16:56:10,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 57 [2021-06-05 16:56:11,007 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:56:11,141 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2021-06-05 16:56:11,141 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:56:11,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:56:11,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:56:11,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:56:11,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:56:11,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:56:11,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:56:11,180 INFO L354 Elim1Store]: treesize reduction 34, result has 40.4 percent of original size [2021-06-05 16:56:11,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 35 [2021-06-05 16:56:11,182 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:56:11,302 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-06-05 16:56:11,302 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:56:11,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:56:11,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:56:11,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:56:11,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:56:11,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:56:11,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:56:11,339 INFO L354 Elim1Store]: treesize reduction 34, result has 40.4 percent of original size [2021-06-05 16:56:11,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 35 [2021-06-05 16:56:11,342 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:56:11,458 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-06-05 16:56:11,459 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:56:11,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:56:11,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:56:11,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:56:11,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:56:11,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:56:11,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:56:11,507 INFO L354 Elim1Store]: treesize reduction 22, result has 61.4 percent of original size [2021-06-05 16:56:11,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 47 [2021-06-05 16:56:11,517 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:56:11,626 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-06-05 16:56:11,626 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:56:11,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:56:11,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:56:11,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:56:11,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:56:11,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:56:11,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:56:11,671 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:56:11,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 69 [2021-06-05 16:56:11,687 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:56:11,784 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:56:11,794 INFO L550 ElimStorePlain]: Start of recursive call 1: 10 dim-0 vars, 10 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-06-05 16:56:11,795 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 20 variables, input treesize:432, output treesize:135 [2021-06-05 16:56:11,936 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:11,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138603273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:11,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:56:11,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-06-05 16:56:11,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761098096] [2021-06-05 16:56:11,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 16:56:11,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:11,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 16:56:11,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=661, Unknown=0, NotChecked=0, Total=756 [2021-06-05 16:56:11,938 INFO L87 Difference]: Start difference. First operand 2086 states and 7328 transitions. Second operand has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:12,547 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 40 [2021-06-05 16:56:12,858 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 39 [2021-06-05 16:56:13,263 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 46 [2021-06-05 16:56:13,724 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 45 [2021-06-05 16:56:14,551 WARN L205 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2021-06-05 16:56:42,887 WARN L205 SmtUtils]: Spent 28.27 s on a formula simplification. DAG size of input: 80 DAG size of output: 62 [2021-06-05 16:57:11,925 WARN L205 SmtUtils]: Spent 28.62 s on a formula simplification. DAG size of input: 77 DAG size of output: 66 [2021-06-05 16:57:12,126 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2021-06-05 16:57:12,303 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 48 [2021-06-05 16:57:14,502 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2021-06-05 16:57:15,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:15,162 INFO L93 Difference]: Finished difference Result 2587 states and 8784 transitions. [2021-06-05 16:57:15,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 16:57:15,162 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 16:57:15,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:15,166 INFO L225 Difference]: With dead ends: 2587 [2021-06-05 16:57:15,166 INFO L226 Difference]: Without dead ends: 2572 [2021-06-05 16:57:15,166 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1243 ImplicationChecksByTransitivity, 91422.9ms TimeCoverageRelationStatistics Valid=855, Invalid=3567, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 16:57:15,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2572 states. [2021-06-05 16:57:15,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2572 to 2119. [2021-06-05 16:57:15,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2119 states, 2118 states have (on average 3.514636449480642) internal successors, (7444), 2118 states have internal predecessors, (7444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:15,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2119 states to 2119 states and 7444 transitions. [2021-06-05 16:57:15,193 INFO L78 Accepts]: Start accepts. Automaton has 2119 states and 7444 transitions. Word has length 29 [2021-06-05 16:57:15,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:15,193 INFO L482 AbstractCegarLoop]: Abstraction has 2119 states and 7444 transitions. [2021-06-05 16:57:15,193 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:15,194 INFO L276 IsEmpty]: Start isEmpty. Operand 2119 states and 7444 transitions. [2021-06-05 16:57:15,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 16:57:15,197 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:15,197 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:57:15,419 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-06-05 16:57:15,419 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:15,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:15,419 INFO L82 PathProgramCache]: Analyzing trace with hash -47808706, now seen corresponding path program 30 times [2021-06-05 16:57:15,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:15,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197509523] [2021-06-05 16:57:15,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:15,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:15,776 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:15,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:15,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197509523] [2021-06-05 16:57:15,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197509523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:15,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311587721] [2021-06-05 16:57:15,777 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:15,801 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:57:15,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:15,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 16:57:15,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:16,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:16,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:16,131 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:57:16,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-06-05 16:57:16,143 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:57:16,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:16,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:16,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:16,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:16,179 INFO L354 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2021-06-05 16:57:16,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 28 [2021-06-05 16:57:16,181 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:57:16,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:16,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:16,216 INFO L354 Elim1Store]: treesize reduction 28, result has 37.8 percent of original size [2021-06-05 16:57:16,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 24 treesize of output 26 [2021-06-05 16:57:16,218 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:57:16,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:16,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:16,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:16,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:16,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:16,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:16,260 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:57:16,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 67 [2021-06-05 16:57:16,294 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:57:16,297 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 16:57:16,298 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:57:16,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:16,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:16,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:16,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:16,323 INFO L354 Elim1Store]: treesize reduction 21, result has 32.3 percent of original size [2021-06-05 16:57:16,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 19 [2021-06-05 16:57:16,324 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:57:16,327 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 16:57:16,328 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:57:16,330 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 16:57:16,331 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:57:16,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:16,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:16,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:16,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:16,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:16,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:16,374 INFO L354 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2021-06-05 16:57:16,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 19 [2021-06-05 16:57:16,377 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:57:16,424 INFO L628 ElimStorePlain]: treesize reduction 56, result has 38.5 percent of original size [2021-06-05 16:57:16,425 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 16:57:16,425 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:307, output treesize:35 [2021-06-05 16:57:16,528 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:16,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311587721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:16,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:16,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2021-06-05 16:57:16,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936036662] [2021-06-05 16:57:16,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 16:57:16,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:16,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 16:57:16,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:57:16,529 INFO L87 Difference]: Start difference. First operand 2119 states and 7444 transitions. Second operand has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:17,615 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2021-06-05 16:57:19,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:19,017 INFO L93 Difference]: Finished difference Result 3291 states and 11148 transitions. [2021-06-05 16:57:19,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 16:57:19,017 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 16:57:19,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:19,022 INFO L225 Difference]: With dead ends: 3291 [2021-06-05 16:57:19,023 INFO L226 Difference]: Without dead ends: 3234 [2021-06-05 16:57:19,023 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 818 ImplicationChecksByTransitivity, 2470.4ms TimeCoverageRelationStatistics Valid=543, Invalid=2537, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 16:57:19,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3234 states. [2021-06-05 16:57:19,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3234 to 2177. [2021-06-05 16:57:19,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2177 states, 2176 states have (on average 3.5091911764705883) internal successors, (7636), 2176 states have internal predecessors, (7636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:19,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2177 states to 2177 states and 7636 transitions. [2021-06-05 16:57:19,055 INFO L78 Accepts]: Start accepts. Automaton has 2177 states and 7636 transitions. Word has length 29 [2021-06-05 16:57:19,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:19,055 INFO L482 AbstractCegarLoop]: Abstraction has 2177 states and 7636 transitions. [2021-06-05 16:57:19,055 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:19,055 INFO L276 IsEmpty]: Start isEmpty. Operand 2177 states and 7636 transitions. [2021-06-05 16:57:19,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 16:57:19,058 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:19,058 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:57:19,258 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:19,259 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:19,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:19,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1876233986, now seen corresponding path program 31 times [2021-06-05 16:57:19,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:19,259 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277866974] [2021-06-05 16:57:19,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:19,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:19,665 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:19,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:19,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277866974] [2021-06-05 16:57:19,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277866974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:19,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386922673] [2021-06-05 16:57:19,666 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:19,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:19,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 16:57:19,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:20,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:20,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:20,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:20,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:20,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:20,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:20,188 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:57:20,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 69 [2021-06-05 16:57:20,211 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:57:20,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:20,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:20,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:20,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:20,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:20,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:20,245 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-05 16:57:20,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 26 [2021-06-05 16:57:20,247 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:57:20,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:20,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:20,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:20,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:20,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:20,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:20,278 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 16:57:20,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 24 [2021-06-05 16:57:20,280 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:57:20,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:20,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:20,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:20,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:20,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:20,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:20,332 INFO L354 Elim1Store]: treesize reduction 22, result has 61.4 percent of original size [2021-06-05 16:57:20,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 47 [2021-06-05 16:57:20,346 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:57:20,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:20,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:57:20,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:20,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:57:20,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:57:20,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:57:20,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 3 [2021-06-05 16:57:20,356 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:57:20,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:20,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:57:20,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:20,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:57:20,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:20,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:57:20,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:57:20,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2021-06-05 16:57:20,366 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:57:20,369 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 16:57:20,369 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:57:20,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:57:20,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:20,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:20,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:20,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:57:20,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:57:20,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:57:20,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 10 [2021-06-05 16:57:20,379 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:57:20,382 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 16:57:20,382 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:57:20,439 INFO L628 ElimStorePlain]: treesize reduction 44, result has 53.2 percent of original size [2021-06-05 16:57:20,440 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 16:57:20,440 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 2 variables, input treesize:367, output treesize:34 [2021-06-05 16:57:20,531 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:20,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386922673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:20,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:20,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 16:57:20,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666837946] [2021-06-05 16:57:20,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 16:57:20,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:20,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 16:57:20,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:57:20,532 INFO L87 Difference]: Start difference. First operand 2177 states and 7636 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:22,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:22,682 INFO L93 Difference]: Finished difference Result 3600 states and 12115 transitions. [2021-06-05 16:57:22,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 16:57:22,682 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 16:57:22,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:22,687 INFO L225 Difference]: With dead ends: 3600 [2021-06-05 16:57:22,687 INFO L226 Difference]: Without dead ends: 3556 [2021-06-05 16:57:22,687 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 937 ImplicationChecksByTransitivity, 2187.8ms TimeCoverageRelationStatistics Valid=683, Invalid=2739, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 16:57:22,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3556 states. [2021-06-05 16:57:22,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3556 to 2245. [2021-06-05 16:57:22,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2245 states, 2244 states have (on average 3.5062388591800357) internal successors, (7868), 2244 states have internal predecessors, (7868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:22,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2245 states to 2245 states and 7868 transitions. [2021-06-05 16:57:22,723 INFO L78 Accepts]: Start accepts. Automaton has 2245 states and 7868 transitions. Word has length 29 [2021-06-05 16:57:22,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:22,723 INFO L482 AbstractCegarLoop]: Abstraction has 2245 states and 7868 transitions. [2021-06-05 16:57:22,723 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:22,724 INFO L276 IsEmpty]: Start isEmpty. Operand 2245 states and 7868 transitions. [2021-06-05 16:57:22,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 16:57:22,726 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:22,726 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:57:22,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:22,929 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:22,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:22,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1584110280, now seen corresponding path program 32 times [2021-06-05 16:57:22,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:22,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350950471] [2021-06-05 16:57:22,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:22,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:23,310 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:23,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:23,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350950471] [2021-06-05 16:57:23,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350950471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:23,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533181930] [2021-06-05 16:57:23,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:23,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:57:23,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:23,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 16:57:23,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:23,909 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:23,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533181930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:23,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:23,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 16:57:23,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897798853] [2021-06-05 16:57:23,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 16:57:23,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:23,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 16:57:23,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:57:23,910 INFO L87 Difference]: Start difference. First operand 2245 states and 7868 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:25,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:25,487 INFO L93 Difference]: Finished difference Result 3142 states and 10717 transitions. [2021-06-05 16:57:25,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 16:57:25,487 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 16:57:25,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:25,492 INFO L225 Difference]: With dead ends: 3142 [2021-06-05 16:57:25,492 INFO L226 Difference]: Without dead ends: 3112 [2021-06-05 16:57:25,493 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 1727.3ms TimeCoverageRelationStatistics Valid=539, Invalid=2217, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 16:57:25,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3112 states. [2021-06-05 16:57:25,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3112 to 2245. [2021-06-05 16:57:25,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2245 states, 2244 states have (on average 3.5062388591800357) internal successors, (7868), 2244 states have internal predecessors, (7868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:25,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2245 states to 2245 states and 7868 transitions. [2021-06-05 16:57:25,522 INFO L78 Accepts]: Start accepts. Automaton has 2245 states and 7868 transitions. Word has length 29 [2021-06-05 16:57:25,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:25,522 INFO L482 AbstractCegarLoop]: Abstraction has 2245 states and 7868 transitions. [2021-06-05 16:57:25,522 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:25,522 INFO L276 IsEmpty]: Start isEmpty. Operand 2245 states and 7868 transitions. [2021-06-05 16:57:25,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 16:57:25,525 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:25,525 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:57:25,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable298 [2021-06-05 16:57:25,726 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:25,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:25,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1619613102, now seen corresponding path program 13 times [2021-06-05 16:57:25,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:25,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242412079] [2021-06-05 16:57:25,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:25,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:26,219 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:26,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:26,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242412079] [2021-06-05 16:57:26,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242412079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:26,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924812790] [2021-06-05 16:57:26,220 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:26,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:26,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 16:57:26,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:27,048 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 89 [2021-06-05 16:57:27,343 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:27,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924812790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:27,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:27,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 16:57:27,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213230174] [2021-06-05 16:57:27,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 16:57:27,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:27,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 16:57:27,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:57:27,344 INFO L87 Difference]: Start difference. First operand 2245 states and 7868 transitions. Second operand has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:33,265 WARN L205 SmtUtils]: Spent 5.42 s on a formula simplification. DAG size of input: 65 DAG size of output: 44 [2021-06-05 16:57:53,892 WARN L205 SmtUtils]: Spent 20.26 s on a formula simplification. DAG size of input: 82 DAG size of output: 61 [2021-06-05 16:57:56,034 WARN L205 SmtUtils]: Spent 2.12 s on a formula simplification. DAG size of input: 59 DAG size of output: 45 [2021-06-05 16:58:00,250 WARN L205 SmtUtils]: Spent 4.18 s on a formula simplification. DAG size of input: 64 DAG size of output: 41 [2021-06-05 16:58:11,969 WARN L205 SmtUtils]: Spent 11.14 s on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2021-06-05 16:58:18,213 WARN L205 SmtUtils]: Spent 6.15 s on a formula simplification. DAG size of input: 65 DAG size of output: 44 [2021-06-05 16:58:18,480 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 72 [2021-06-05 16:58:18,757 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 50 [2021-06-05 16:58:19,251 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 46 [2021-06-05 16:58:19,549 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 49 [2021-06-05 16:58:19,748 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 60 [2021-06-05 16:58:20,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:20,064 INFO L93 Difference]: Finished difference Result 3710 states and 12255 transitions. [2021-06-05 16:58:20,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 16:58:20,064 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 16:58:20,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:20,070 INFO L225 Difference]: With dead ends: 3710 [2021-06-05 16:58:20,070 INFO L226 Difference]: Without dead ends: 3695 [2021-06-05 16:58:20,070 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1184 ImplicationChecksByTransitivity, 52853.9ms TimeCoverageRelationStatistics Valid=782, Invalid=3250, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 16:58:20,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3695 states. [2021-06-05 16:58:20,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3695 to 2255. [2021-06-05 16:58:20,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2255 states, 2254 states have (on average 3.503549245785271) internal successors, (7897), 2254 states have internal predecessors, (7897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:20,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2255 states to 2255 states and 7897 transitions. [2021-06-05 16:58:20,106 INFO L78 Accepts]: Start accepts. Automaton has 2255 states and 7897 transitions. Word has length 29 [2021-06-05 16:58:20,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:20,106 INFO L482 AbstractCegarLoop]: Abstraction has 2255 states and 7897 transitions. [2021-06-05 16:58:20,106 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:20,106 INFO L276 IsEmpty]: Start isEmpty. Operand 2255 states and 7897 transitions. [2021-06-05 16:58:20,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 16:58:20,109 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:20,109 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:58:20,309 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable355 [2021-06-05 16:58:20,309 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:20,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:20,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1969180942, now seen corresponding path program 14 times [2021-06-05 16:58:20,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:20,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258643795] [2021-06-05 16:58:20,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:20,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:20,678 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:20,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:20,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258643795] [2021-06-05 16:58:20,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258643795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:20,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594717404] [2021-06-05 16:58:20,679 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:20,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:58:20,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:58:20,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 16:58:20,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:21,505 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 91 [2021-06-05 16:58:21,603 INFO L446 ElimStorePlain]: Different costs {5=[v_prenex_41, v_prenex_39], 7=[A, v_prenex_43, v_prenex_42, v_prenex_40]} [2021-06-05 16:58:21,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:58:21,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:58:21,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:58:21,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:58:21,617 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:21,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2021-06-05 16:58:21,619 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:58:21,764 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2021-06-05 16:58:21,765 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:21,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:58:21,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:58:21,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:58:21,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:58:21,779 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:21,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2021-06-05 16:58:21,780 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:58:21,911 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-06-05 16:58:21,911 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:21,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:58:21,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:58:21,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:58:21,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:58:21,939 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:21,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 36 [2021-06-05 16:58:21,950 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:58:21,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:58:21,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:58:21,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:58:21,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:58:21,975 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:21,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 36 [2021-06-05 16:58:21,983 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:58:22,186 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 79 [2021-06-05 16:58:22,187 INFO L628 ElimStorePlain]: treesize reduction 24, result has 91.0 percent of original size [2021-06-05 16:58:22,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:58:22,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:58:22,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:58:22,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:58:22,210 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 16:58:22,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 24 [2021-06-05 16:58:22,211 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:58:22,305 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:22,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:58:22,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:58:22,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:58:22,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:58:22,339 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-06-05 16:58:22,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 22 [2021-06-05 16:58:22,340 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:58:22,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:58:22,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:58:22,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:58:22,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:58:22,363 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-06-05 16:58:22,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 22 [2021-06-05 16:58:22,365 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:58:22,506 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 63 [2021-06-05 16:58:22,507 INFO L628 ElimStorePlain]: treesize reduction 27, result has 85.5 percent of original size [2021-06-05 16:58:22,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:58:22,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:58:22,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:58:22,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:58:22,526 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:22,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 36 [2021-06-05 16:58:22,533 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:58:22,597 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:22,600 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 16:58:22,600 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:345, output treesize:82 [2021-06-05 16:58:22,727 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 18 [2021-06-05 16:58:22,753 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:22,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594717404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:22,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:22,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 16:58:22,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650900112] [2021-06-05 16:58:22,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 16:58:22,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:22,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 16:58:22,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:58:22,754 INFO L87 Difference]: Start difference. First operand 2255 states and 7897 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:23,539 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 59 [2021-06-05 16:58:36,326 WARN L205 SmtUtils]: Spent 12.25 s on a formula simplification. DAG size of input: 96 DAG size of output: 73 [2021-06-05 16:58:39,733 WARN L205 SmtUtils]: Spent 3.37 s on a formula simplification. DAG size of input: 83 DAG size of output: 62 [2021-06-05 16:59:02,323 WARN L205 SmtUtils]: Spent 22.36 s on a formula simplification. DAG size of input: 100 DAG size of output: 76 [2021-06-05 16:59:02,637 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 64 [2021-06-05 16:59:03,104 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2021-06-05 16:59:03,367 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 64 [2021-06-05 16:59:03,538 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 48 [2021-06-05 16:59:04,032 WARN L205 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 96 [2021-06-05 16:59:04,899 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-06-05 16:59:05,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:05,038 INFO L93 Difference]: Finished difference Result 4143 states and 13701 transitions. [2021-06-05 16:59:05,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 16:59:05,039 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 16:59:05,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:05,044 INFO L225 Difference]: With dead ends: 4143 [2021-06-05 16:59:05,044 INFO L226 Difference]: Without dead ends: 4113 [2021-06-05 16:59:05,045 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1285 ImplicationChecksByTransitivity, 42614.3ms TimeCoverageRelationStatistics Valid=809, Invalid=3481, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 16:59:05,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4113 states. [2021-06-05 16:59:05,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4113 to 2272. [2021-06-05 16:59:05,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2272 states, 2271 states have (on average 3.5055041831792164) internal successors, (7961), 2271 states have internal predecessors, (7961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:05,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2272 states to 2272 states and 7961 transitions. [2021-06-05 16:59:05,079 INFO L78 Accepts]: Start accepts. Automaton has 2272 states and 7961 transitions. Word has length 29 [2021-06-05 16:59:05,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:05,079 INFO L482 AbstractCegarLoop]: Abstraction has 2272 states and 7961 transitions. [2021-06-05 16:59:05,079 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:05,079 INFO L276 IsEmpty]: Start isEmpty. Operand 2272 states and 7961 transitions. [2021-06-05 16:59:05,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 16:59:05,082 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:05,082 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:59:05,282 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable369,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:05,283 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:05,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:05,283 INFO L82 PathProgramCache]: Analyzing trace with hash -580502318, now seen corresponding path program 15 times [2021-06-05 16:59:05,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:05,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449875960] [2021-06-05 16:59:05,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:05,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:05,776 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:05,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:05,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449875960] [2021-06-05 16:59:05,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449875960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:05,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596661221] [2021-06-05 16:59:05,776 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:05,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:59:05,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:05,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 16:59:05,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:06,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:06,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:06,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:06,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:06,533 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:06,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2021-06-05 16:59:06,535 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:59:06,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:06,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:06,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:06,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:06,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:06,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:06,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:06,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:06,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:06,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:59:06,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:59:06,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:59:06,646 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:06,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 7 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 13 case distinctions, treesize of input 35 treesize of output 88 [2021-06-05 16:59:06,714 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 16:59:06,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:06,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:06,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:06,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:06,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:06,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:06,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:06,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:06,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:06,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:59:06,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:59:06,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:59:06,757 INFO L354 Elim1Store]: treesize reduction 78, result has 1.3 percent of original size [2021-06-05 16:59:06,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 7 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 13 case distinctions, treesize of input 35 treesize of output 13 [2021-06-05 16:59:06,758 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:59:06,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:06,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:06,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:06,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:06,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:06,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:06,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:06,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:06,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:06,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:59:06,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:59:06,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:59:06,863 INFO L354 Elim1Store]: treesize reduction 14, result has 82.3 percent of original size [2021-06-05 16:59:06,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 7 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 13 case distinctions, treesize of input 35 treesize of output 74 [2021-06-05 16:59:06,908 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:59:06,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:06,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:06,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:06,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:06,925 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:06,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2021-06-05 16:59:06,926 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:59:06,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:06,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:06,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:06,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:06,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:06,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:06,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:06,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:06,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:06,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:59:06,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:59:06,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:59:07,012 INFO L354 Elim1Store]: treesize reduction 16, result has 79.7 percent of original size [2021-06-05 16:59:07,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 7 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 13 case distinctions, treesize of input 35 treesize of output 72 [2021-06-05 16:59:07,030 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:59:07,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:07,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:07,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:07,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:07,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:07,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:07,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:07,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:07,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:07,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:59:07,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:59:07,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:59:07,066 INFO L354 Elim1Store]: treesize reduction 78, result has 1.3 percent of original size [2021-06-05 16:59:07,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 7 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 13 case distinctions, treesize of input 35 treesize of output 13 [2021-06-05 16:59:07,067 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:59:07,071 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 16:59:07,072 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:59:07,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:07,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:07,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:07,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:07,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:07,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:07,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:07,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:07,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:07,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:59:07,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:59:07,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:59:07,162 INFO L354 Elim1Store]: treesize reduction 26, result has 67.1 percent of original size [2021-06-05 16:59:07,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 7 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 13 case distinctions, treesize of input 35 treesize of output 62 [2021-06-05 16:59:07,181 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:59:07,185 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 16:59:07,185 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:59:07,355 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 34 [2021-06-05 16:59:07,355 INFO L628 ElimStorePlain]: treesize reduction 219, result has 44.6 percent of original size [2021-06-05 16:59:07,358 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 16:59:07,358 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 2 variables, input treesize:632, output treesize:216 [2021-06-05 16:59:07,514 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 32 [2021-06-05 16:59:07,579 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:07,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596661221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:07,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:07,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17] total 27 [2021-06-05 16:59:07,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662048227] [2021-06-05 16:59:07,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 16:59:07,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:07,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 16:59:07,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:59:07,583 INFO L87 Difference]: Start difference. First operand 2272 states and 7961 transitions. Second operand has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:09,253 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 49 [2021-06-05 16:59:09,679 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 50 [2021-06-05 16:59:10,009 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2021-06-05 16:59:10,126 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2021-06-05 16:59:10,282 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 70 [2021-06-05 16:59:10,609 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 38 [2021-06-05 16:59:10,760 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2021-06-05 16:59:10,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:10,854 INFO L93 Difference]: Finished difference Result 3440 states and 11411 transitions. [2021-06-05 16:59:10,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 16:59:10,854 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 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 29 [2021-06-05 16:59:10,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:10,859 INFO L225 Difference]: With dead ends: 3440 [2021-06-05 16:59:10,859 INFO L226 Difference]: Without dead ends: 3375 [2021-06-05 16:59:10,860 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 962 ImplicationChecksByTransitivity, 3503.6ms TimeCoverageRelationStatistics Valid=410, Invalid=2782, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 16:59:10,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3375 states. [2021-06-05 16:59:10,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3375 to 2300. [2021-06-05 16:59:10,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2300 states, 2299 states have (on average 3.4993475424097435) internal successors, (8045), 2299 states have internal predecessors, (8045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:10,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2300 states to 2300 states and 8045 transitions. [2021-06-05 16:59:10,894 INFO L78 Accepts]: Start accepts. Automaton has 2300 states and 8045 transitions. Word has length 29 [2021-06-05 16:59:10,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:10,894 INFO L482 AbstractCegarLoop]: Abstraction has 2300 states and 8045 transitions. [2021-06-05 16:59:10,894 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:10,894 INFO L276 IsEmpty]: Start isEmpty. Operand 2300 states and 8045 transitions. [2021-06-05 16:59:10,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 16:59:10,897 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:10,897 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:59:11,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable398 [2021-06-05 16:59:11,098 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:11,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:11,098 INFO L82 PathProgramCache]: Analyzing trace with hash -517413926, now seen corresponding path program 16 times [2021-06-05 16:59:11,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:11,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688479179] [2021-06-05 16:59:11,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:11,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:11,483 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:11,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:11,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688479179] [2021-06-05 16:59:11,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688479179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:11,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98850911] [2021-06-05 16:59:11,484 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:11,507 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:59:11,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:11,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 16:59:11,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:12,000 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:12,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98850911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:12,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:12,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 16:59:12,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696913946] [2021-06-05 16:59:12,001 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 16:59:12,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:12,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 16:59:12,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:59:12,002 INFO L87 Difference]: Start difference. First operand 2300 states and 8045 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:12,936 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 48 [2021-06-05 16:59:13,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:13,171 INFO L93 Difference]: Finished difference Result 3205 states and 10722 transitions. [2021-06-05 16:59:13,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 16:59:13,172 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 16:59:13,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:13,176 INFO L225 Difference]: With dead ends: 3205 [2021-06-05 16:59:13,176 INFO L226 Difference]: Without dead ends: 3190 [2021-06-05 16:59:13,177 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 1478.2ms TimeCoverageRelationStatistics Valid=189, Invalid=933, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 16:59:13,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3190 states. [2021-06-05 16:59:13,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3190 to 2296. [2021-06-05 16:59:13,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2296 states, 2295 states have (on average 3.5002178649237474) internal successors, (8033), 2295 states have internal predecessors, (8033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:13,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2296 states to 2296 states and 8033 transitions. [2021-06-05 16:59:13,208 INFO L78 Accepts]: Start accepts. Automaton has 2296 states and 8033 transitions. Word has length 29 [2021-06-05 16:59:13,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:13,208 INFO L482 AbstractCegarLoop]: Abstraction has 2296 states and 8033 transitions. [2021-06-05 16:59:13,208 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:13,208 INFO L276 IsEmpty]: Start isEmpty. Operand 2296 states and 8033 transitions. [2021-06-05 16:59:13,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 16:59:13,211 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:13,211 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:59:13,411 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable516,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:13,411 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:13,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:13,412 INFO L82 PathProgramCache]: Analyzing trace with hash 1600210838, now seen corresponding path program 17 times [2021-06-05 16:59:13,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:13,412 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101866226] [2021-06-05 16:59:13,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:13,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:13,810 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:13,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:13,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101866226] [2021-06-05 16:59:13,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101866226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:13,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821197856] [2021-06-05 16:59:13,810 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:13,834 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:59:13,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:13,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 16:59:13,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:14,670 INFO L446 ElimStorePlain]: Different costs {5=[v_prenex_51, v_prenex_55], 7=[v_prenex_50, A, v_prenex_54, v_prenex_52, v_prenex_58, v_prenex_57]} [2021-06-05 16:59:14,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:14,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:14,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:14,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:14,689 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:14,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2021-06-05 16:59:14,690 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:59:14,825 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-06-05 16:59:14,825 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:14,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:14,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:14,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:14,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:14,841 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:14,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2021-06-05 16:59:14,842 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:59:14,971 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-06-05 16:59:14,971 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:14,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:14,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:14,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:14,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:14,998 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-06-05 16:59:14,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 22 [2021-06-05 16:59:15,000 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:59:15,124 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2021-06-05 16:59:15,125 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:15,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:15,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:15,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:15,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:15,147 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:15,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 36 [2021-06-05 16:59:15,160 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:59:15,278 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-06-05 16:59:15,278 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:15,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:15,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:15,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:15,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:15,304 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-06-05 16:59:15,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 22 [2021-06-05 16:59:15,306 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:59:15,418 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2021-06-05 16:59:15,418 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:15,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:15,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:15,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:15,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:15,446 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:15,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 36 [2021-06-05 16:59:15,459 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:59:15,566 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-06-05 16:59:15,566 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:15,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:15,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:15,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:15,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:15,590 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:15,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 36 [2021-06-05 16:59:15,601 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:59:15,698 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:15,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:15,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:15,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:15,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:15,723 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 16:59:15,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 24 [2021-06-05 16:59:15,725 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:59:15,816 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:15,820 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 16:59:15,820 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:345, output treesize:103 [2021-06-05 16:59:15,998 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 18 [2021-06-05 16:59:16,014 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:16,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821197856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:16,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:16,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 16:59:16,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234194524] [2021-06-05 16:59:16,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 16:59:16,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:16,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 16:59:16,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:59:16,015 INFO L87 Difference]: Start difference. First operand 2296 states and 8033 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:24,590 WARN L205 SmtUtils]: Spent 8.11 s on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2021-06-05 16:59:52,908 WARN L205 SmtUtils]: Spent 28.04 s on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2021-06-05 17:00:01,087 WARN L205 SmtUtils]: Spent 8.14 s on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2021-06-05 17:00:26,322 WARN L205 SmtUtils]: Spent 25.05 s on a formula simplification. DAG size of input: 77 DAG size of output: 67 [2021-06-05 17:00:26,878 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 75 [2021-06-05 17:00:27,106 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 81 [2021-06-05 17:00:27,372 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 76 [2021-06-05 17:00:27,642 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 82 [2021-06-05 17:00:28,094 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 79 [2021-06-05 17:00:28,393 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 77 [2021-06-05 17:00:28,600 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 81 [2021-06-05 17:00:28,950 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 91 [2021-06-05 17:00:29,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:29,234 INFO L93 Difference]: Finished difference Result 3169 states and 10683 transitions. [2021-06-05 17:00:29,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 17:00:29,234 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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 29 [2021-06-05 17:00:29,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:29,239 INFO L225 Difference]: With dead ends: 3169 [2021-06-05 17:00:29,239 INFO L226 Difference]: Without dead ends: 3115 [2021-06-05 17:00:29,240 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 880 ImplicationChecksByTransitivity, 73250.1ms TimeCoverageRelationStatistics Valid=458, Invalid=2734, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 17:00:29,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3115 states. [2021-06-05 17:00:29,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3115 to 2316. [2021-06-05 17:00:29,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2316 states, 2315 states have (on average 3.498488120950324) internal successors, (8099), 2315 states have internal predecessors, (8099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:29,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2316 states to 2316 states and 8099 transitions. [2021-06-05 17:00:29,275 INFO L78 Accepts]: Start accepts. Automaton has 2316 states and 8099 transitions. Word has length 29 [2021-06-05 17:00:29,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:29,275 INFO L482 AbstractCegarLoop]: Abstraction has 2316 states and 8099 transitions. [2021-06-05 17:00:29,275 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:29,275 INFO L276 IsEmpty]: Start isEmpty. Operand 2316 states and 8099 transitions. [2021-06-05 17:00:29,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 17:00:29,278 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:29,278 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:00:29,479 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable523,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:29,479 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:29,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:29,479 INFO L82 PathProgramCache]: Analyzing trace with hash 2024544714, now seen corresponding path program 18 times [2021-06-05 17:00:29,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:29,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388916649] [2021-06-05 17:00:29,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:29,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:29,834 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:29,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:29,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388916649] [2021-06-05 17:00:29,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388916649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:29,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524451594] [2021-06-05 17:00:29,834 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:29,858 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 17:00:29,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:29,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 17:00:29,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:30,368 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:30,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524451594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:30,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:30,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 17:00:30,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330169760] [2021-06-05 17:00:30,368 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 17:00:30,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:30,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 17:00:30,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-06-05 17:00:30,369 INFO L87 Difference]: Start difference. First operand 2316 states and 8099 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:30,941 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 47 [2021-06-05 17:00:31,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:31,045 INFO L93 Difference]: Finished difference Result 2857 states and 9771 transitions. [2021-06-05 17:00:31,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 17:00:31,045 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 17:00:31,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:31,049 INFO L225 Difference]: With dead ends: 2857 [2021-06-05 17:00:31,050 INFO L226 Difference]: Without dead ends: 2842 [2021-06-05 17:00:31,050 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 1057.9ms TimeCoverageRelationStatistics Valid=163, Invalid=707, Unknown=0, NotChecked=0, Total=870 [2021-06-05 17:00:31,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2842 states. [2021-06-05 17:00:31,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2842 to 2306. [2021-06-05 17:00:31,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2306 states, 2305 states have (on average 3.5010845986984815) internal successors, (8070), 2305 states have internal predecessors, (8070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:31,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2306 states to 2306 states and 8070 transitions. [2021-06-05 17:00:31,081 INFO L78 Accepts]: Start accepts. Automaton has 2306 states and 8070 transitions. Word has length 29 [2021-06-05 17:00:31,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:31,081 INFO L482 AbstractCegarLoop]: Abstraction has 2306 states and 8070 transitions. [2021-06-05 17:00:31,081 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:31,081 INFO L276 IsEmpty]: Start isEmpty. Operand 2306 states and 8070 transitions. [2021-06-05 17:00:31,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 17:00:31,083 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:31,084 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:00:31,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable557 [2021-06-05 17:00:31,284 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:31,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:31,284 INFO L82 PathProgramCache]: Analyzing trace with hash -1418429486, now seen corresponding path program 19 times [2021-06-05 17:00:31,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:31,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109068345] [2021-06-05 17:00:31,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:31,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:31,680 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:31,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:31,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109068345] [2021-06-05 17:00:31,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109068345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:31,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528375216] [2021-06-05 17:00:31,681 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:31,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:31,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 17:00:31,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:36,031 WARN L205 SmtUtils]: Spent 4.07 s on a formula simplification that was a NOOP. DAG size: 39 [2021-06-05 17:00:40,145 WARN L205 SmtUtils]: Spent 4.06 s on a formula simplification that was a NOOP. DAG size: 58 [2021-06-05 17:00:40,370 INFO L446 ElimStorePlain]: Different costs {5=[v_prenex_70, v_prenex_67], 7=[A, v_prenex_74, v_prenex_73, v_prenex_69, v_prenex_68, v_prenex_77]} [2021-06-05 17:00:40,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:00:40,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:00:40,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:00:40,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:00:40,392 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:00:40,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2021-06-05 17:00:40,393 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:00:40,508 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2021-06-05 17:00:40,509 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:00:40,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:00:40,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:00:40,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:00:40,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:00:40,528 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:00:40,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2021-06-05 17:00:40,530 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 17:00:40,640 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2021-06-05 17:00:40,641 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:00:40,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:00:40,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:00:40,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:00:40,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:00:40,665 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:00:40,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 36 [2021-06-05 17:00:40,675 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 17:00:40,775 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:00:40,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:00:40,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:00:40,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:00:40,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:00:40,804 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-06-05 17:00:40,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 22 [2021-06-05 17:00:40,805 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 17:00:40,902 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:00:40,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:00:40,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:00:40,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:00:40,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:00:40,926 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 17:00:40,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 24 [2021-06-05 17:00:40,928 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 17:00:41,047 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-06-05 17:00:41,047 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:00:41,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:00:41,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:00:41,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:00:41,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:00:41,076 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:00:41,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 36 [2021-06-05 17:00:41,089 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 17:00:41,183 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:00:41,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:00:41,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:00:41,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:00:41,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:00:41,206 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 17:00:41,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 24 [2021-06-05 17:00:41,208 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 17:00:41,289 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:00:41,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:00:41,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:00:41,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:00:41,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:00:41,322 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:00:41,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 36 [2021-06-05 17:00:41,331 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 17:00:41,405 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:00:41,409 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 17:00:41,409 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:305, output treesize:91 [2021-06-05 17:00:41,519 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:41,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528375216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:41,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:41,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 17:00:41,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108885732] [2021-06-05 17:00:41,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 17:00:41,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:41,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 17:00:41,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2021-06-05 17:00:41,520 INFO L87 Difference]: Start difference. First operand 2306 states and 8070 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:50,307 WARN L205 SmtUtils]: Spent 8.19 s on a formula simplification. DAG size of input: 76 DAG size of output: 48 [2021-06-05 17:01:00,670 WARN L205 SmtUtils]: Spent 10.20 s on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2021-06-05 17:01:09,153 WARN L205 SmtUtils]: Spent 8.19 s on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2021-06-05 17:01:17,364 WARN L205 SmtUtils]: Spent 8.18 s on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2021-06-05 17:01:33,744 WARN L205 SmtUtils]: Spent 14.29 s on a formula simplification. DAG size of input: 90 DAG size of output: 75 [2021-06-05 17:01:46,333 WARN L205 SmtUtils]: Spent 12.56 s on a formula simplification. DAG size of input: 77 DAG size of output: 68 [2021-06-05 17:01:54,722 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2021-06-05 17:01:54,878 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 34 [2021-06-05 17:01:55,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:55,141 INFO L93 Difference]: Finished difference Result 3233 states and 11042 transitions. [2021-06-05 17:01:55,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 17:01:55,141 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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 29 [2021-06-05 17:01:55,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:55,147 INFO L225 Difference]: With dead ends: 3233 [2021-06-05 17:01:55,147 INFO L226 Difference]: Without dead ends: 3218 [2021-06-05 17:01:55,147 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 71504.1ms TimeCoverageRelationStatistics Valid=329, Invalid=1651, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 17:01:55,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3218 states. [2021-06-05 17:01:55,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3218 to 2318. [2021-06-05 17:01:55,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2318 states, 2317 states have (on average 3.503668536901165) internal successors, (8118), 2317 states have internal predecessors, (8118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:55,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2318 states to 2318 states and 8118 transitions. [2021-06-05 17:01:55,186 INFO L78 Accepts]: Start accepts. Automaton has 2318 states and 8118 transitions. Word has length 29 [2021-06-05 17:01:55,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:55,186 INFO L482 AbstractCegarLoop]: Abstraction has 2318 states and 8118 transitions. [2021-06-05 17:01:55,186 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:55,186 INFO L276 IsEmpty]: Start isEmpty. Operand 2318 states and 8118 transitions. [2021-06-05 17:01:55,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 17:01:55,190 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:55,190 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:01:55,406 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable564 [2021-06-05 17:01:55,406 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:55,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:55,406 INFO L82 PathProgramCache]: Analyzing trace with hash 1099848014, now seen corresponding path program 33 times [2021-06-05 17:01:55,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:55,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112690998] [2021-06-05 17:01:55,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:55,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:55,788 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:55,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:55,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112690998] [2021-06-05 17:01:55,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112690998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:55,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386256636] [2021-06-05 17:01:55,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:01:55,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 17:01:55,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:01:55,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 17:01:55,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:56,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:01:56,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:01:56,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:01:56,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:01:56,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:01:56,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:01:56,240 INFO L354 Elim1Store]: treesize reduction 24, result has 59.3 percent of original size [2021-06-05 17:01:56,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 47 [2021-06-05 17:01:56,248 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:01:56,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:01:56,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:01:56,275 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:01:56,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-06-05 17:01:56,285 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 17:01:56,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:01:56,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:01:56,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:01:56,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:01:56,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:01:56,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:01:56,330 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:01:56,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 71 [2021-06-05 17:01:56,350 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 17:01:56,353 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 17:01:56,354 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 17:01:56,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:01:56,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:01:56,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:01:56,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:01:56,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:01:56,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 10 [2021-06-05 17:01:56,363 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 17:01:56,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:01:56,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:01:56,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:01:56,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:01:56,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:01:56,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:01:56,409 INFO L354 Elim1Store]: treesize reduction 36, result has 39.0 percent of original size [2021-06-05 17:01:56,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 35 [2021-06-05 17:01:56,410 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 17:01:56,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:01:56,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:01:56,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:01:56,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:01:56,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:01:56,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:01:56,439 INFO L354 Elim1Store]: treesize reduction 21, result has 32.3 percent of original size [2021-06-05 17:01:56,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 19 [2021-06-05 17:01:56,441 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 17:01:56,443 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 17:01:56,444 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 17:01:56,446 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 17:01:56,447 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 17:01:56,505 INFO L628 ElimStorePlain]: treesize reduction 43, result has 50.6 percent of original size [2021-06-05 17:01:56,506 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 17:01:56,506 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 2 variables, input treesize:388, output treesize:34 [2021-06-05 17:01:56,570 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:56,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386256636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:56,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:56,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 17:01:56,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710088746] [2021-06-05 17:01:56,571 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 17:01:56,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:56,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 17:01:56,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-06-05 17:01:56,571 INFO L87 Difference]: Start difference. First operand 2318 states and 8118 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:57,265 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 33 [2021-06-05 17:01:59,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:59,177 INFO L93 Difference]: Finished difference Result 4037 states and 13530 transitions. [2021-06-05 17:01:59,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 17:01:59,178 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 17:01:59,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:59,184 INFO L225 Difference]: With dead ends: 4037 [2021-06-05 17:01:59,184 INFO L226 Difference]: Without dead ends: 3993 [2021-06-05 17:01:59,184 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 917 ImplicationChecksByTransitivity, 2429.3ms TimeCoverageRelationStatistics Valid=657, Invalid=2535, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 17:01:59,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3993 states. [2021-06-05 17:01:59,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3993 to 2466. [2021-06-05 17:01:59,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2466 states, 2465 states have (on average 3.5030425963488843) internal successors, (8635), 2465 states have internal predecessors, (8635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:59,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2466 states to 2466 states and 8635 transitions. [2021-06-05 17:01:59,228 INFO L78 Accepts]: Start accepts. Automaton has 2466 states and 8635 transitions. Word has length 29 [2021-06-05 17:01:59,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:59,228 INFO L482 AbstractCegarLoop]: Abstraction has 2466 states and 8635 transitions. [2021-06-05 17:01:59,228 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:59,228 INFO L276 IsEmpty]: Start isEmpty. Operand 2466 states and 8635 transitions. [2021-06-05 17:01:59,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 17:01:59,231 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:59,231 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:01:59,431 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable598 [2021-06-05 17:01:59,431 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:59,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:59,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1934471044, now seen corresponding path program 34 times [2021-06-05 17:01:59,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:59,432 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198300971] [2021-06-05 17:01:59,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:59,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:59,761 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:59,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:59,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198300971] [2021-06-05 17:01:59,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198300971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:59,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426020403] [2021-06-05 17:01:59,761 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:01:59,807 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:01:59,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:01:59,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 17:01:59,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:00,269 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:00,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426020403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:00,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:00,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 17:02:00,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309431713] [2021-06-05 17:02:00,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 17:02:00,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:00,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 17:02:00,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2021-06-05 17:02:00,271 INFO L87 Difference]: Start difference. First operand 2466 states and 8635 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:02,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:02,093 INFO L93 Difference]: Finished difference Result 3644 states and 12305 transitions. [2021-06-05 17:02:02,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 17:02:02,094 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 17:02:02,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:02,100 INFO L225 Difference]: With dead ends: 3644 [2021-06-05 17:02:02,100 INFO L226 Difference]: Without dead ends: 3600 [2021-06-05 17:02:02,100 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 725 ImplicationChecksByTransitivity, 1733.8ms TimeCoverageRelationStatistics Valid=515, Invalid=2137, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 17:02:02,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3600 states. [2021-06-05 17:02:02,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3600 to 2454. [2021-06-05 17:02:02,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2454 states, 2453 states have (on average 3.5026498165511617) internal successors, (8592), 2453 states have internal predecessors, (8592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:02,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2454 states to 2454 states and 8592 transitions. [2021-06-05 17:02:02,137 INFO L78 Accepts]: Start accepts. Automaton has 2454 states and 8592 transitions. Word has length 29 [2021-06-05 17:02:02,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:02,137 INFO L482 AbstractCegarLoop]: Abstraction has 2454 states and 8592 transitions. [2021-06-05 17:02:02,137 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:02,137 INFO L276 IsEmpty]: Start isEmpty. Operand 2454 states and 8592 transitions. [2021-06-05 17:02:02,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 17:02:02,140 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:02,140 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:02:02,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable673 [2021-06-05 17:02:02,342 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:02,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:02,342 INFO L82 PathProgramCache]: Analyzing trace with hash -1316037810, now seen corresponding path program 20 times [2021-06-05 17:02:02,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:02,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701532066] [2021-06-05 17:02:02,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:02,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:02,988 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:02,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:02,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701532066] [2021-06-05 17:02:02,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701532066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:02,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983010266] [2021-06-05 17:02:02,989 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:02:03,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:02:03,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:02:03,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 17:02:03,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:03,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:02:03,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:02:03,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:02:03,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:02:03,313 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 17:02:03,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 13 [2021-06-05 17:02:03,314 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:02:03,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:02:03,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:02:03,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:02:03,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:02:03,328 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 17:02:03,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 10 [2021-06-05 17:02:03,329 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 17:02:03,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:02:03,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:02:03,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:02:03,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:02:03,354 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 17:02:03,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 13 [2021-06-05 17:02:03,355 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 17:02:03,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:02:03,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:02:03,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:02:03,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:02:03,375 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:02:03,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2021-06-05 17:02:03,376 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 17:02:03,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:02:03,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:02:03,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:02:03,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:02:03,393 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 17:02:03,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 10 [2021-06-05 17:02:03,395 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 17:02:03,398 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 17:02:03,399 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 17:02:03,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:02:03,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:02:03,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:02:03,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:02:03,436 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 17:02:03,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 24 [2021-06-05 17:02:03,438 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 17:02:03,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:02:03,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:02:03,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:02:03,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:02:03,476 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-06-05 17:02:03,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 22 [2021-06-05 17:02:03,478 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 17:02:03,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:02:03,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:02:03,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:02:03,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:02:03,494 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 17:02:03,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 13 [2021-06-05 17:02:03,495 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 17:02:03,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:02:03,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:02:03,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:02:03,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:02:03,522 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:02:03,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 36 [2021-06-05 17:02:03,530 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 17:02:03,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:02:03,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:02:03,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:02:03,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:02:03,545 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:02:03,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2021-06-05 17:02:03,546 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 17:02:03,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:02:03,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:02:03,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:02:03,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:02:03,564 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:02:03,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 36 [2021-06-05 17:02:03,571 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 17:02:03,628 INFO L628 ElimStorePlain]: treesize reduction 33, result has 57.7 percent of original size [2021-06-05 17:02:03,629 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 17:02:03,629 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 1 variables, input treesize:431, output treesize:45 [2021-06-05 17:02:03,686 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:03,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983010266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:03,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:03,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 25 [2021-06-05 17:02:03,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519664005] [2021-06-05 17:02:03,686 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 17:02:03,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:03,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 17:02:03,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2021-06-05 17:02:03,687 INFO L87 Difference]: Start difference. First operand 2454 states and 8592 transitions. Second operand has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:04,552 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 61 [2021-06-05 17:02:04,750 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 55 [2021-06-05 17:02:05,018 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 69 [2021-06-05 17:02:05,305 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 52 [2021-06-05 17:02:05,699 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 66 [2021-06-05 17:02:05,894 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 63 [2021-06-05 17:02:06,034 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 38 [2021-06-05 17:02:06,264 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 51 [2021-06-05 17:02:06,443 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 51 [2021-06-05 17:02:06,789 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 53 [2021-06-05 17:02:07,246 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 49 [2021-06-05 17:02:07,533 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 72 [2021-06-05 17:02:07,688 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 64 [2021-06-05 17:02:07,863 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 47 [2021-06-05 17:02:08,036 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 58 [2021-06-05 17:02:08,193 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 67 [2021-06-05 17:02:08,490 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2021-06-05 17:02:08,841 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 62 [2021-06-05 17:02:09,088 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 75 [2021-06-05 17:02:09,378 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 89 [2021-06-05 17:02:09,507 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 66 [2021-06-05 17:02:09,738 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 73 [2021-06-05 17:02:09,920 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2021-06-05 17:02:10,202 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2021-06-05 17:02:10,486 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 74 [2021-06-05 17:02:10,779 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 85 [2021-06-05 17:02:11,117 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 93 [2021-06-05 17:02:11,272 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2021-06-05 17:02:11,439 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 59 [2021-06-05 17:02:11,677 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 58 [2021-06-05 17:02:11,890 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 48 [2021-06-05 17:02:12,236 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2021-06-05 17:02:12,424 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2021-06-05 17:02:12,740 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 68 [2021-06-05 17:02:13,014 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 76 [2021-06-05 17:02:13,585 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2021-06-05 17:02:13,760 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 46 [2021-06-05 17:02:13,981 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 62 [2021-06-05 17:02:14,225 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 68 [2021-06-05 17:02:14,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:14,363 INFO L93 Difference]: Finished difference Result 4608 states and 15272 transitions. [2021-06-05 17:02:14,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-05 17:02:14,363 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 17:02:14,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:14,370 INFO L225 Difference]: With dead ends: 4608 [2021-06-05 17:02:14,370 INFO L226 Difference]: Without dead ends: 4593 [2021-06-05 17:02:14,371 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2963 ImplicationChecksByTransitivity, 9464.1ms TimeCoverageRelationStatistics Valid=908, Invalid=7648, Unknown=0, NotChecked=0, Total=8556 [2021-06-05 17:02:14,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4593 states. [2021-06-05 17:02:14,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4593 to 2453. [2021-06-05 17:02:14,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2453 states, 2452 states have (on average 3.504078303425775) internal successors, (8592), 2452 states have internal predecessors, (8592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:14,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2453 states to 2453 states and 8592 transitions. [2021-06-05 17:02:14,436 INFO L78 Accepts]: Start accepts. Automaton has 2453 states and 8592 transitions. Word has length 29 [2021-06-05 17:02:14,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:14,436 INFO L482 AbstractCegarLoop]: Abstraction has 2453 states and 8592 transitions. [2021-06-05 17:02:14,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:14,436 INFO L276 IsEmpty]: Start isEmpty. Operand 2453 states and 8592 transitions. [2021-06-05 17:02:14,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 17:02:14,439 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:14,439 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:02:14,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable726 [2021-06-05 17:02:14,653 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:14,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:14,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1804724658, now seen corresponding path program 21 times [2021-06-05 17:02:14,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:14,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995469827] [2021-06-05 17:02:14,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:14,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:15,333 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:15,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:15,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995469827] [2021-06-05 17:02:15,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995469827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:15,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259836497] [2021-06-05 17:02:15,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:02:15,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 17:02:15,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:02:15,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 17:02:15,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:54,454 WARN L205 SmtUtils]: Spent 38.66 s on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2021-06-05 17:02:54,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:02:54,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:02:54,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:02:54,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:02:54,652 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:02:54,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2021-06-05 17:02:54,654 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:02:54,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:02:54,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:02:54,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:02:54,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:02:54,663 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:02:54,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2021-06-05 17:02:54,665 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 17:02:54,723 INFO L628 ElimStorePlain]: treesize reduction 15, result has 81.3 percent of original size [2021-06-05 17:02:54,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:02:54,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:02:54,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:02:54,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:02:54,732 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:02:54,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2021-06-05 17:02:54,733 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 17:02:54,758 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:02:54,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:02:54,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:02:54,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:02:54,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:02:54,767 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:02:54,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2021-06-05 17:02:54,768 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 17:02:54,788 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:02:54,789 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 17:02:54,789 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:112, output treesize:33 [2021-06-05 17:02:54,854 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:54,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259836497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:54,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:54,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 29 [2021-06-05 17:02:54,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244455683] [2021-06-05 17:02:54,855 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 17:02:54,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:54,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 17:02:54,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2021-06-05 17:02:54,856 INFO L87 Difference]: Start difference. First operand 2453 states and 8592 transitions. Second operand has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:55,921 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 66 [2021-06-05 17:02:56,652 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 65 [2021-06-05 17:02:56,913 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 49 [2021-06-05 17:02:58,000 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 52 [2021-06-05 17:02:58,219 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 69 [2021-06-05 17:02:58,363 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 66 [2021-06-05 17:02:58,508 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 60 [2021-06-05 17:02:59,538 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 61 [2021-06-05 17:02:59,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:59,633 INFO L93 Difference]: Finished difference Result 4353 states and 14593 transitions. [2021-06-05 17:02:59,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 17:02:59,633 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 17:02:59,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:59,640 INFO L225 Difference]: With dead ends: 4353 [2021-06-05 17:02:59,640 INFO L226 Difference]: Without dead ends: 4323 [2021-06-05 17:02:59,640 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1511 ImplicationChecksByTransitivity, 43252.4ms TimeCoverageRelationStatistics Valid=650, Invalid=4042, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 17:02:59,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4323 states. [2021-06-05 17:02:59,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4323 to 2463. [2021-06-05 17:02:59,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2463 states, 2462 states have (on average 3.500812347684809) internal successors, (8619), 2462 states have internal predecessors, (8619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:59,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2463 states to 2463 states and 8619 transitions. [2021-06-05 17:02:59,683 INFO L78 Accepts]: Start accepts. Automaton has 2463 states and 8619 transitions. Word has length 29 [2021-06-05 17:02:59,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:59,683 INFO L482 AbstractCegarLoop]: Abstraction has 2463 states and 8619 transitions. [2021-06-05 17:02:59,683 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:59,683 INFO L276 IsEmpty]: Start isEmpty. Operand 2463 states and 8619 transitions. [2021-06-05 17:02:59,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 17:02:59,686 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:59,686 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:02:59,886 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable743,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:02:59,886 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:59,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:59,887 INFO L82 PathProgramCache]: Analyzing trace with hash 1829857094, now seen corresponding path program 22 times [2021-06-05 17:02:59,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:59,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890737946] [2021-06-05 17:02:59,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:59,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:00,513 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:00,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:03:00,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890737946] [2021-06-05 17:03:00,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890737946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:00,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611725155] [2021-06-05 17:03:00,513 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:03:00,536 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:03:00,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:03:00,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 17:03:00,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:03:04,835 WARN L205 SmtUtils]: Spent 4.10 s on a formula simplification that was a NOOP. DAG size: 61 [2021-06-05 17:03:05,606 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 89 [2021-06-05 17:03:05,678 INFO L446 ElimStorePlain]: Different costs {5=[v_prenex_93, v_prenex_91], 7=[v_prenex_94, A, v_prenex_92, v_prenex_90]} [2021-06-05 17:03:05,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:03:05,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:03:05,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:03:05,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:03:05,698 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:03:05,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2021-06-05 17:03:05,701 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:03:05,904 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2021-06-05 17:03:05,904 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:03:05,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:03:05,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:03:05,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:03:05,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:03:05,926 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:03:05,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2021-06-05 17:03:05,928 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 17:03:06,107 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-06-05 17:03:06,107 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:03:06,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:03:06,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:03:06,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:03:06,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:03:06,136 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:03:06,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 36 [2021-06-05 17:03:06,145 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 17:03:06,290 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-06-05 17:03:06,291 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:03:06,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:03:06,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:03:06,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:03:06,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:03:06,325 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 17:03:06,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 24 [2021-06-05 17:03:06,326 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 17:03:06,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:03:06,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:03:06,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:03:06,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:03:06,351 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-06-05 17:03:06,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 22 [2021-06-05 17:03:06,353 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 17:03:06,566 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 72 [2021-06-05 17:03:06,566 INFO L628 ElimStorePlain]: treesize reduction 27, result has 89.3 percent of original size [2021-06-05 17:03:06,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:03:06,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:03:06,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:03:06,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:03:06,590 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-06-05 17:03:06,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 22 [2021-06-05 17:03:06,592 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 17:03:06,688 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:03:06,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:03:06,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:03:06,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:03:06,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:03:06,717 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:03:06,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 36 [2021-06-05 17:03:06,727 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 17:03:06,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:03:06,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:03:06,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:03:06,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:03:06,749 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:03:06,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 36 [2021-06-05 17:03:06,758 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 17:03:06,891 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2021-06-05 17:03:06,892 INFO L628 ElimStorePlain]: treesize reduction 24, result has 85.0 percent of original size [2021-06-05 17:03:06,895 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 17:03:06,895 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:345, output treesize:82 [2021-06-05 17:03:07,027 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 18 [2021-06-05 17:03:07,071 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:07,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611725155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:07,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:03:07,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 26 [2021-06-05 17:03:07,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177132116] [2021-06-05 17:03:07,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 17:03:07,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:03:07,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 17:03:07,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2021-06-05 17:03:07,072 INFO L87 Difference]: Start difference. First operand 2463 states and 8619 transitions. Second operand has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 26 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:09,825 WARN L205 SmtUtils]: Spent 2.24 s on a formula simplification. DAG size of input: 68 DAG size of output: 42 [2021-06-05 17:03:10,040 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 65 [2021-06-05 17:03:16,535 WARN L205 SmtUtils]: Spent 6.45 s on a formula simplification. DAG size of input: 91 DAG size of output: 51 [2021-06-05 17:03:26,782 WARN L205 SmtUtils]: Spent 10.21 s on a formula simplification. DAG size of input: 85 DAG size of output: 52 [2021-06-05 17:03:26,932 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 36 [2021-06-05 17:03:27,175 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 70 [2021-06-05 17:03:27,473 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 67 [2021-06-05 17:03:27,622 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 63 [2021-06-05 17:03:34,557 WARN L205 SmtUtils]: Spent 6.87 s on a formula simplification. DAG size of input: 105 DAG size of output: 59 [2021-06-05 17:03:34,796 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2021-06-05 17:03:45,648 WARN L205 SmtUtils]: Spent 10.77 s on a formula simplification. DAG size of input: 92 DAG size of output: 64 [2021-06-05 17:03:51,897 WARN L205 SmtUtils]: Spent 6.22 s on a formula simplification. DAG size of input: 84 DAG size of output: 74 [2021-06-05 17:04:06,907 WARN L205 SmtUtils]: Spent 14.98 s on a formula simplification. DAG size of input: 80 DAG size of output: 69 [2021-06-05 17:04:07,563 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-06-05 17:04:08,101 WARN L205 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 71 [2021-06-05 17:04:13,447 WARN L205 SmtUtils]: Spent 5.28 s on a formula simplification. DAG size of input: 86 DAG size of output: 76 [2021-06-05 17:04:20,017 WARN L205 SmtUtils]: Spent 6.50 s on a formula simplification. DAG size of input: 101 DAG size of output: 80 [2021-06-05 17:04:20,269 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 69 [2021-06-05 17:04:20,471 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 60 [2021-06-05 17:04:20,869 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-06-05 17:04:23,385 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 94 [2021-06-05 17:04:23,718 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 108 [2021-06-05 17:04:24,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:24,308 INFO L93 Difference]: Finished difference Result 4854 states and 16220 transitions. [2021-06-05 17:04:24,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 17:04:24,309 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 26 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 29 [2021-06-05 17:04:24,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:24,316 INFO L225 Difference]: With dead ends: 4854 [2021-06-05 17:04:24,316 INFO L226 Difference]: Without dead ends: 4824 [2021-06-05 17:04:24,317 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1552 ImplicationChecksByTransitivity, 79222.3ms TimeCoverageRelationStatistics Valid=761, Invalid=4069, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 17:04:24,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4824 states. [2021-06-05 17:04:24,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4824 to 2470. [2021-06-05 17:04:24,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2470 states, 2469 states have (on average 3.5006075334143376) internal successors, (8643), 2469 states have internal predecessors, (8643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:24,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2470 states to 2470 states and 8643 transitions. [2021-06-05 17:04:24,373 INFO L78 Accepts]: Start accepts. Automaton has 2470 states and 8643 transitions. Word has length 29 [2021-06-05 17:04:24,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:24,374 INFO L482 AbstractCegarLoop]: Abstraction has 2470 states and 8643 transitions. [2021-06-05 17:04:24,374 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 26 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:24,374 INFO L276 IsEmpty]: Start isEmpty. Operand 2470 states and 8643 transitions. [2021-06-05 17:04:24,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 17:04:24,377 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:24,377 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:04:24,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable760 [2021-06-05 17:04:24,578 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:24,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:24,578 INFO L82 PathProgramCache]: Analyzing trace with hash -1094655562, now seen corresponding path program 23 times [2021-06-05 17:04:24,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:24,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90713895] [2021-06-05 17:04:24,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:24,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:25,206 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:25,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:25,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90713895] [2021-06-05 17:04:25,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90713895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:25,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709818192] [2021-06-05 17:04:25,207 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:25,232 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 17:04:25,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:25,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 17:04:25,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:25,699 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-06-05 17:04:26,117 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 69 [2021-06-05 17:04:26,416 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 72 [2021-06-05 17:04:26,613 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:26,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709818192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:26,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:26,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 28 [2021-06-05 17:04:26,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237931] [2021-06-05 17:04:26,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 17:04:26,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:26,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 17:04:26,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=625, Unknown=0, NotChecked=0, Total=756 [2021-06-05 17:04:26,614 INFO L87 Difference]: Start difference. First operand 2470 states and 8643 transitions. Second operand has 28 states, 28 states have (on average 1.75) internal successors, (49), 28 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:28,874 WARN L205 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 32 DAG size of output: 32 [2021-06-05 17:04:31,199 WARN L205 SmtUtils]: Spent 2.10 s on a formula simplification. DAG size of input: 64 DAG size of output: 44 [2021-06-05 17:04:33,343 WARN L205 SmtUtils]: Spent 2.12 s on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2021-06-05 17:04:33,506 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 35 [2021-06-05 17:04:33,670 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 68 [2021-06-05 17:04:34,050 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 51 [2021-06-05 17:04:34,401 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 65 [2021-06-05 17:04:38,204 WARN L205 SmtUtils]: Spent 3.77 s on a formula simplification. DAG size of input: 103 DAG size of output: 49 [2021-06-05 17:04:42,485 WARN L205 SmtUtils]: Spent 4.21 s on a formula simplification. DAG size of input: 90 DAG size of output: 80 [2021-06-05 17:04:42,846 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 52 [2021-06-05 17:04:43,237 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 71 [2021-06-05 17:04:45,645 WARN L205 SmtUtils]: Spent 2.36 s on a formula simplification. DAG size of input: 117 DAG size of output: 82 [2021-06-05 17:04:45,947 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 81 [2021-06-05 17:04:46,207 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 64 [2021-06-05 17:04:46,386 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 59 [2021-06-05 17:04:47,048 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 62 [2021-06-05 17:04:47,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:47,142 INFO L93 Difference]: Finished difference Result 4250 states and 14363 transitions. [2021-06-05 17:04:47,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 17:04:47,143 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.75) internal successors, (49), 28 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 17:04:47,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:47,149 INFO L225 Difference]: With dead ends: 4250 [2021-06-05 17:04:47,149 INFO L226 Difference]: Without dead ends: 4235 [2021-06-05 17:04:47,149 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 974 ImplicationChecksByTransitivity, 20974.8ms TimeCoverageRelationStatistics Valid=552, Invalid=2640, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 17:04:47,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4235 states. [2021-06-05 17:04:47,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4235 to 2477. [2021-06-05 17:04:47,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2477 states, 2476 states have (on average 3.500403877221325) internal successors, (8667), 2476 states have internal predecessors, (8667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:47,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2477 states to 2477 states and 8667 transitions. [2021-06-05 17:04:47,185 INFO L78 Accepts]: Start accepts. Automaton has 2477 states and 8667 transitions. Word has length 29 [2021-06-05 17:04:47,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:47,185 INFO L482 AbstractCegarLoop]: Abstraction has 2477 states and 8667 transitions. [2021-06-05 17:04:47,185 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.75) internal successors, (49), 28 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:47,185 INFO L276 IsEmpty]: Start isEmpty. Operand 2477 states and 8667 transitions. [2021-06-05 17:04:47,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 17:04:47,188 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:47,188 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:04:47,389 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable793 [2021-06-05 17:04:47,389 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:47,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:47,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1069523126, now seen corresponding path program 24 times [2021-06-05 17:04:47,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:47,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506563230] [2021-06-05 17:04:47,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:47,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:48,032 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:48,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:48,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506563230] [2021-06-05 17:04:48,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506563230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:48,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240418906] [2021-06-05 17:04:48,033 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:48,057 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 17:04:48,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:48,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 17:04:48,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:52,384 WARN L205 SmtUtils]: Spent 4.08 s on a formula simplification that was a NOOP. DAG size: 34 [2021-06-05 17:05:32,704 WARN L205 SmtUtils]: Spent 40.23 s on a formula simplification. DAG size of input: 102 DAG size of output: 82 [2021-06-05 17:05:32,755 INFO L446 ElimStorePlain]: Different costs {5=[A, v_prenex_111], 7=[v_prenex_107, v_prenex_108, v_prenex_109, v_prenex_110]} [2021-06-05 17:05:32,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:32,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:32,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:32,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:32,773 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:05:32,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2021-06-05 17:05:32,774 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:05:32,895 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-06-05 17:05:32,896 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:05:32,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:32,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:32,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:32,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:32,915 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:05:32,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2021-06-05 17:05:32,917 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 17:05:33,033 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-06-05 17:05:33,033 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:05:33,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:33,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:33,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:33,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:33,064 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:05:33,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 36 [2021-06-05 17:05:33,073 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 17:05:33,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:33,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:33,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:33,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:33,105 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:05:33,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 36 [2021-06-05 17:05:33,115 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 17:05:33,293 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 72 [2021-06-05 17:05:33,293 INFO L628 ElimStorePlain]: treesize reduction 19, result has 91.5 percent of original size [2021-06-05 17:05:33,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:33,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:33,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:33,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:33,326 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-06-05 17:05:33,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 22 [2021-06-05 17:05:33,328 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 17:05:33,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:33,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:33,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:33,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:33,354 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 17:05:33,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 24 [2021-06-05 17:05:33,355 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 17:05:33,488 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 63 [2021-06-05 17:05:33,489 INFO L628 ElimStorePlain]: treesize reduction 21, result has 87.3 percent of original size [2021-06-05 17:05:33,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:33,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:33,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:33,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:33,513 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-06-05 17:05:33,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 22 [2021-06-05 17:05:33,514 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 17:05:33,588 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:05:33,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:33,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:33,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:33,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:33,611 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:05:33,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 36 [2021-06-05 17:05:33,620 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 17:05:33,673 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:05:33,675 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 17:05:33,675 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:301, output treesize:71 [2021-06-05 17:05:33,808 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:33,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240418906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:33,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:33,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 26 [2021-06-05 17:05:33,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993640302] [2021-06-05 17:05:33,809 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 17:05:33,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:33,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 17:05:33,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2021-06-05 17:05:33,809 INFO L87 Difference]: Start difference. First operand 2477 states and 8667 transitions. Second operand has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 26 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:34,500 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 65 [2021-06-05 17:05:34,807 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 53 [2021-06-05 17:05:35,101 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 70 [2021-06-05 17:05:35,459 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 68 [2021-06-05 17:05:35,608 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 62 [2021-06-05 17:05:35,800 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 62 [2021-06-05 17:05:36,205 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 54 [2021-06-05 17:05:44,360 WARN L205 SmtUtils]: Spent 8.12 s on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2021-06-05 17:05:44,884 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2021-06-05 17:05:51,269 WARN L205 SmtUtils]: Spent 6.15 s on a formula simplification. DAG size of input: 73 DAG size of output: 42 [2021-06-05 17:05:51,673 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 61 [2021-06-05 17:05:51,916 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2021-06-05 17:06:40,699 WARN L205 SmtUtils]: Spent 48.55 s on a formula simplification. DAG size of input: 141 DAG size of output: 108 [2021-06-05 17:06:55,066 WARN L205 SmtUtils]: Spent 14.31 s on a formula simplification. DAG size of input: 92 DAG size of output: 87 [2021-06-05 17:07:37,622 WARN L205 SmtUtils]: Spent 42.45 s on a formula simplification. DAG size of input: 150 DAG size of output: 112 [2021-06-05 17:07:37,769 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2021-06-05 17:07:38,053 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 62 [2021-06-05 17:07:38,351 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2021-06-05 17:07:38,673 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 68 [2021-06-05 17:07:38,846 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 58 [2021-06-05 17:07:39,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:07:39,063 INFO L93 Difference]: Finished difference Result 4860 states and 16315 transitions. [2021-06-05 17:07:39,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 17:07:39,064 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 26 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 29 [2021-06-05 17:07:39,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:07:39,071 INFO L225 Difference]: With dead ends: 4860 [2021-06-05 17:07:39,071 INFO L226 Difference]: Without dead ends: 4830 [2021-06-05 17:07:39,071 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1616 ImplicationChecksByTransitivity, 169017.5ms TimeCoverageRelationStatistics Valid=803, Invalid=4167, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 17:07:39,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4830 states. [2021-06-05 17:07:39,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4830 to 2466. [2021-06-05 17:07:39,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2466 states, 2465 states have (on average 3.502231237322515) internal successors, (8633), 2465 states have internal predecessors, (8633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:39,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2466 states to 2466 states and 8633 transitions. [2021-06-05 17:07:39,112 INFO L78 Accepts]: Start accepts. Automaton has 2466 states and 8633 transitions. Word has length 29 [2021-06-05 17:07:39,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:07:39,112 INFO L482 AbstractCegarLoop]: Abstraction has 2466 states and 8633 transitions. [2021-06-05 17:07:39,112 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 26 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:39,112 INFO L276 IsEmpty]: Start isEmpty. Operand 2466 states and 8633 transitions. [2021-06-05 17:07:39,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 17:07:39,115 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:07:39,115 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:07:39,317 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable804,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:39,318 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:07:39,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:07:39,318 INFO L82 PathProgramCache]: Analyzing trace with hash -847199862, now seen corresponding path program 35 times [2021-06-05 17:07:39,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:07:39,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44689792] [2021-06-05 17:07:39,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:07:39,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:39,587 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:39,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:07:39,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44689792] [2021-06-05 17:07:39,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44689792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:39,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210512296] [2021-06-05 17:07:39,587 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:39,611 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 17:07:39,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:07:39,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 17:07:39,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:07:40,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:07:40,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:07:40,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:07:40,098 INFO L354 Elim1Store]: treesize reduction 14, result has 75.4 percent of original size [2021-06-05 17:07:40,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 26 treesize of output 52 [2021-06-05 17:07:40,108 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:07:40,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:07:40,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:07:40,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:07:40,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:07:40,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:07:40,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:07:40,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:07:40,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:07:40,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:07:40,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:07:40,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:07:40,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 7 [2021-06-05 17:07:40,123 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 17:07:40,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:07:40,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:07:40,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:07:40,169 INFO L354 Elim1Store]: treesize reduction 28, result has 50.9 percent of original size [2021-06-05 17:07:40,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 26 treesize of output 38 [2021-06-05 17:07:40,179 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 17:07:40,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:07:40,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:07:40,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:07:40,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:07:40,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:07:40,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:07:40,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:07:40,218 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-06-05 17:07:40,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 23 [2021-06-05 17:07:40,220 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 17:07:40,223 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 17:07:40,224 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 17:07:40,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:07:40,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:07:40,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:07:40,282 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:07:40,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 33 treesize of output 97 [2021-06-05 17:07:40,320 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 17:07:40,323 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 17:07:40,324 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 17:07:40,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:07:40,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:07:40,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:07:40,393 INFO L354 Elim1Store]: treesize reduction 36, result has 57.6 percent of original size [2021-06-05 17:07:40,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 33 treesize of output 61 [2021-06-05 17:07:40,403 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 17:07:40,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:07:40,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:07:40,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:07:40,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:07:40,423 INFO L354 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2021-06-05 17:07:40,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 19 [2021-06-05 17:07:40,424 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 17:07:40,501 INFO L628 ElimStorePlain]: treesize reduction 112, result has 36.7 percent of original size [2021-06-05 17:07:40,502 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 17:07:40,502 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 2 variables, input treesize:433, output treesize:52 [2021-06-05 17:07:40,713 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:40,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210512296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:40,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:07:40,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2021-06-05 17:07:40,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049026523] [2021-06-05 17:07:40,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 17:07:40,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:07:40,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 17:07:40,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2021-06-05 17:07:40,714 INFO L87 Difference]: Start difference. First operand 2466 states and 8633 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 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) [2021-06-05 17:07:42,698 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2021-06-05 17:07:42,857 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2021-06-05 17:07:42,999 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-06-05 17:07:43,343 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2021-06-05 17:07:43,639 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2021-06-05 17:07:43,800 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2021-06-05 17:07:44,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:07:44,629 INFO L93 Difference]: Finished difference Result 4518 states and 15011 transitions. [2021-06-05 17:07:44,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 17:07:44,629 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 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) Word has length 29 [2021-06-05 17:07:44,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:07:44,636 INFO L225 Difference]: With dead ends: 4518 [2021-06-05 17:07:44,636 INFO L226 Difference]: Without dead ends: 4474 [2021-06-05 17:07:44,636 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1326 ImplicationChecksByTransitivity, 3602.1ms TimeCoverageRelationStatistics Valid=810, Invalid=3746, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 17:07:44,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4474 states. [2021-06-05 17:07:44,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4474 to 2505. [2021-06-05 17:07:44,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2505 states, 2504 states have (on average 3.5027955271565494) internal successors, (8771), 2504 states have internal predecessors, (8771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:44,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2505 states to 2505 states and 8771 transitions. [2021-06-05 17:07:44,678 INFO L78 Accepts]: Start accepts. Automaton has 2505 states and 8771 transitions. Word has length 29 [2021-06-05 17:07:44,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:07:44,678 INFO L482 AbstractCegarLoop]: Abstraction has 2505 states and 8771 transitions. [2021-06-05 17:07:44,678 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 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) [2021-06-05 17:07:44,678 INFO L276 IsEmpty]: Start isEmpty. Operand 2505 states and 8771 transitions. [2021-06-05 17:07:44,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 17:07:44,681 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:07:44,681 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:07:44,890 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable833,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:44,890 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:07:44,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:07:44,890 INFO L82 PathProgramCache]: Analyzing trace with hash -12576832, now seen corresponding path program 36 times [2021-06-05 17:07:44,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:07:44,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687446171] [2021-06-05 17:07:44,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:07:44,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:45,229 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:45,229 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:07:45,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687446171] [2021-06-05 17:07:45,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687446171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:45,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841957515] [2021-06-05 17:07:45,229 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:45,261 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 17:07:45,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:07:45,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 17:07:45,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:07:45,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:07:45,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:07:45,574 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:07:45,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 33 [2021-06-05 17:07:45,586 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:07:45,589 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 17:07:45,589 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 17:07:45,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:07:45,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:07:45,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:07:45,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:07:45,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:07:45,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:07:45,621 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-06-05 17:07:45,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 17:07:45,623 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 17:07:45,626 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 17:07:45,626 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 17:07:45,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:07:45,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:07:45,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:07:45,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:07:45,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:07:45,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:07:45,680 INFO L354 Elim1Store]: treesize reduction 22, result has 60.0 percent of original size [2021-06-05 17:07:45,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 45 [2021-06-05 17:07:45,689 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 17:07:45,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:07:45,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:07:45,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:07:45,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:07:45,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:07:45,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:07:45,734 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:07:45,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 67 [2021-06-05 17:07:45,753 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 17:07:45,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:07:45,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:07:45,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:07:45,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:07:45,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:07:45,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2021-06-05 17:07:45,761 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 17:07:45,764 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 17:07:45,765 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 17:07:45,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:07:45,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:07:45,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:07:45,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:07:45,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:07:45,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:07:45,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 10 [2021-06-05 17:07:45,771 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 17:07:45,817 INFO L628 ElimStorePlain]: treesize reduction 18, result has 66.0 percent of original size [2021-06-05 17:07:45,818 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 17:07:45,818 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:355, output treesize:35 [2021-06-05 17:07:45,883 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:45,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841957515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:45,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:07:45,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 17:07:45,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222754131] [2021-06-05 17:07:45,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 17:07:45,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:07:45,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 17:07:45,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2021-06-05 17:07:45,884 INFO L87 Difference]: Start difference. First operand 2505 states and 8771 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:47,528 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2021-06-05 17:07:47,775 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 63 [2021-06-05 17:07:48,131 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 56 [2021-06-05 17:07:48,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:07:48,569 INFO L93 Difference]: Finished difference Result 4394 states and 14553 transitions. [2021-06-05 17:07:48,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 17:07:48,569 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 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 29 [2021-06-05 17:07:48,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:07:48,578 INFO L225 Difference]: With dead ends: 4394 [2021-06-05 17:07:48,578 INFO L226 Difference]: Without dead ends: 4364 [2021-06-05 17:07:48,579 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 914 ImplicationChecksByTransitivity, 2487.0ms TimeCoverageRelationStatistics Valid=590, Invalid=2490, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 17:07:48,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4364 states. [2021-06-05 17:07:48,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4364 to 2537. [2021-06-05 17:07:48,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2537 states, 2536 states have (on average 3.5055205047318614) internal successors, (8890), 2536 states have internal predecessors, (8890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:48,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2537 states to 2537 states and 8890 transitions. [2021-06-05 17:07:48,629 INFO L78 Accepts]: Start accepts. Automaton has 2537 states and 8890 transitions. Word has length 29 [2021-06-05 17:07:48,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:07:48,629 INFO L482 AbstractCegarLoop]: Abstraction has 2537 states and 8890 transitions. [2021-06-05 17:07:48,629 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:48,629 INFO L276 IsEmpty]: Start isEmpty. Operand 2537 states and 8890 transitions. [2021-06-05 17:07:48,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 17:07:48,632 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:07:48,632 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:07:48,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable929,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:48,833 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:07:48,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:07:48,833 INFO L82 PathProgramCache]: Analyzing trace with hash -207836590, now seen corresponding path program 37 times [2021-06-05 17:07:48,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:07:48,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596849847] [2021-06-05 17:07:48,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:07:48,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:49,121 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:49,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:07:49,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596849847] [2021-06-05 17:07:49,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596849847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:49,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850250854] [2021-06-05 17:07:49,121 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:49,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:49,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 17:07:49,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:07:49,590 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:49,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850250854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:49,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:07:49,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2021-06-05 17:07:49,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535014324] [2021-06-05 17:07:49,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 17:07:49,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:07:49,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 17:07:49,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=428, Unknown=0, NotChecked=0, Total=552 [2021-06-05 17:07:49,591 INFO L87 Difference]: Start difference. First operand 2537 states and 8890 transitions. Second operand has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:50,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:07:50,851 INFO L93 Difference]: Finished difference Result 3675 states and 12063 transitions. [2021-06-05 17:07:50,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 17:07:50,851 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 17:07:50,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:07:50,857 INFO L225 Difference]: With dead ends: 3675 [2021-06-05 17:07:50,857 INFO L226 Difference]: Without dead ends: 3645 [2021-06-05 17:07:50,857 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 1350.0ms TimeCoverageRelationStatistics Valid=450, Invalid=1806, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 17:07:50,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3645 states. [2021-06-05 17:07:50,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3645 to 2550. [2021-06-05 17:07:50,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2550 states, 2549 states have (on average 3.507257748136524) internal successors, (8940), 2549 states have internal predecessors, (8940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:50,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2550 states to 2550 states and 8940 transitions. [2021-06-05 17:07:50,897 INFO L78 Accepts]: Start accepts. Automaton has 2550 states and 8940 transitions. Word has length 29 [2021-06-05 17:07:50,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:07:50,897 INFO L482 AbstractCegarLoop]: Abstraction has 2550 states and 8940 transitions. [2021-06-05 17:07:50,897 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:50,897 INFO L276 IsEmpty]: Start isEmpty. Operand 2550 states and 8940 transitions. [2021-06-05 17:07:50,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 17:07:50,900 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:07:50,900 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:07:51,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable964 [2021-06-05 17:07:51,101 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:07:51,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:07:51,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1152820346, now seen corresponding path program 25 times [2021-06-05 17:07:51,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:07:51,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326650661] [2021-06-05 17:07:51,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:07:51,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:51,555 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:51,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:07:51,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326650661] [2021-06-05 17:07:51,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326650661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:51,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025657174] [2021-06-05 17:07:51,556 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:51,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:51,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 17:07:51,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:07:55,934 WARN L205 SmtUtils]: Spent 4.08 s on a formula simplification that was a NOOP. DAG size: 42 [2021-06-05 17:08:20,303 WARN L205 SmtUtils]: Spent 24.22 s on a formula simplification. DAG size of input: 102 DAG size of output: 82 [2021-06-05 17:08:20,595 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:08:20,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025657174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:20,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:08:20,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 17:08:20,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133953469] [2021-06-05 17:08:20,596 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 17:08:20,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:08:20,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 17:08:20,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2021-06-05 17:08:20,596 INFO L87 Difference]: Start difference. First operand 2550 states and 8940 transitions. Second operand has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:29,459 WARN L205 SmtUtils]: Spent 8.12 s on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2021-06-05 17:08:31,998 WARN L205 SmtUtils]: Spent 2.10 s on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2021-06-05 17:08:53,129 WARN L205 SmtUtils]: Spent 14.15 s on a formula simplification. DAG size of input: 93 DAG size of output: 59 [2021-06-05 17:08:53,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:08:53,348 INFO L93 Difference]: Finished difference Result 3621 states and 12320 transitions. [2021-06-05 17:08:53,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 17:08:53,348 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 17:08:53,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:08:53,354 INFO L225 Difference]: With dead ends: 3621 [2021-06-05 17:08:53,354 INFO L226 Difference]: Without dead ends: 3606 [2021-06-05 17:08:53,354 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 885 ImplicationChecksByTransitivity, 54810.1ms TimeCoverageRelationStatistics Valid=605, Invalid=2257, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 17:08:53,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3606 states. [2021-06-05 17:08:53,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3606 to 2553. [2021-06-05 17:08:53,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2553 states, 2552 states have (on average 3.5078369905956115) internal successors, (8952), 2552 states have internal predecessors, (8952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:53,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2553 states to 2553 states and 8952 transitions. [2021-06-05 17:08:53,390 INFO L78 Accepts]: Start accepts. Automaton has 2553 states and 8952 transitions. Word has length 29 [2021-06-05 17:08:53,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:08:53,390 INFO L482 AbstractCegarLoop]: Abstraction has 2553 states and 8952 transitions. [2021-06-05 17:08:53,391 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:53,391 INFO L276 IsEmpty]: Start isEmpty. Operand 2553 states and 8952 transitions. [2021-06-05 17:08:53,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 17:08:53,393 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:08:53,394 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:08:53,594 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1021,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:08:53,594 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:08:53,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:08:53,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1177952782, now seen corresponding path program 26 times [2021-06-05 17:08:53,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:08:53,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852396941] [2021-06-05 17:08:53,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:08:53,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:08:53,996 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:08:53,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:08:53,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852396941] [2021-06-05 17:08:53,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852396941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:53,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076263498] [2021-06-05 17:08:53,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:08:54,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:08:54,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:08:54,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 17:08:54,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2021-06-05 17:08:58,329 WARN L222 SmtUtils]: Removed 10 from assertion stack [2021-06-05 17:08:58,529 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1035 [2021-06-05 17:08:58,530 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 17:08:58,531 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 17:08:58,532 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 17:08:58,532 INFO L202 PluginConnector]: Adding new model sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 05:08:58 BasicIcfg [2021-06-05 17:08:58,533 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 17:08:58,533 INFO L168 Benchmark]: Toolchain (without parser) took 855165.78 ms. Allocated memory was 337.6 MB in the beginning and 532.7 MB in the end (delta: 195.0 MB). Free memory was 317.1 MB in the beginning and 252.2 MB in the end (delta: 64.9 MB). Peak memory consumption was 262.1 MB. Max. memory is 16.0 GB. [2021-06-05 17:08:58,533 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 337.6 MB. Free memory was 318.3 MB in the beginning and 318.2 MB in the end (delta: 71.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 17:08:58,533 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.34 ms. Allocated memory is still 337.6 MB. Free memory was 317.0 MB in the beginning and 315.6 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 17:08:58,533 INFO L168 Benchmark]: Boogie Preprocessor took 12.95 ms. Allocated memory is still 337.6 MB. Free memory was 315.6 MB in the beginning and 314.7 MB in the end (delta: 959.7 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 17:08:58,533 INFO L168 Benchmark]: RCFGBuilder took 308.66 ms. Allocated memory is still 337.6 MB. Free memory was 314.6 MB in the beginning and 301.1 MB in the end (delta: 13.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. [2021-06-05 17:08:58,533 INFO L168 Benchmark]: TraceAbstraction took 854813.40 ms. Allocated memory was 337.6 MB in the beginning and 532.7 MB in the end (delta: 195.0 MB). Free memory was 300.7 MB in the beginning and 252.2 MB in the end (delta: 48.5 MB). Peak memory consumption was 247.4 MB. Max. memory is 16.0 GB. [2021-06-05 17:08:58,533 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 0.13 ms. Allocated memory is still 337.6 MB. Free memory was 318.3 MB in the beginning and 318.2 MB in the end (delta: 71.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 26.34 ms. Allocated memory is still 337.6 MB. Free memory was 317.0 MB in the beginning and 315.6 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 12.95 ms. Allocated memory is still 337.6 MB. Free memory was 315.6 MB in the beginning and 314.7 MB in the end (delta: 959.7 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 308.66 ms. Allocated memory is still 337.6 MB. Free memory was 314.6 MB in the beginning and 301.1 MB in the end (delta: 13.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 854813.40 ms. Allocated memory was 337.6 MB in the beginning and 532.7 MB in the end (delta: 195.0 MB). Free memory was 300.7 MB in the beginning and 252.2 MB in the end (delta: 48.5 MB). Peak memory consumption was 247.4 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 63]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 30 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 42 for 4031ms.. - TimeoutResultAtElement [Line: 62]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 30 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 42 for 4031ms.. - TimeoutResultAtElement [Line: 62]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 30 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 42 for 4031ms.. - TimeoutResultAtElement [Line: 69]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 30 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 42 for 4031ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 45 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 854679.4ms, OverallIterations: 101, TraceHistogramMax: 2, EmptinessCheckTime: 218.6ms, AutomataDifference: 623360.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 27.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 4145 SDtfs, 23004 SDslu, 26692 SDs, 0 SdLazy, 43876 SolverSat, 3869 SolverUnsat, 10 SolverUnknown, 0 SolverNotchecked, 45272.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5122 GetRequests, 1997 SyntacticMatches, 75 SemanticMatches, 3050 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37270 ImplicationChecksByTransitivity, 748940.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=2553occurred in iteration=100, InterpolantAutomatonStates: 2610, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 2534.3ms AutomataMinimizationTime, 100 MinimizatonAttempts, 88159 StatesRemovedByMinimization, 100 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 334.3ms SsaConstructionTime, 971.1ms SatisfiabilityAnalysisTime, 200522.5ms InterpolantComputationTime, 5182 NumberOfCodeBlocks, 5182 NumberOfCodeBlocksAsserted, 298 NumberOfCheckSat, 4990 ConstructedInterpolants, 69 QuantifiedInterpolants, 56148 SizeOfPredicates, 391 NumberOfNonLiveVariables, 5368 ConjunctsInSsa, 993 ConjunctsInUnsatCore, 192 InterpolantComputations, 8 PerfectInterpolantSequences, 247/891 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