/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/multiply-verify.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 06:52:44,585 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 06:52:44,587 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 06:52:44,610 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 06:52:44,642 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 06:52:44,643 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 06:52:44,644 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 06:52:44,646 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-05 06:52:44,670 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 06:52:44,671 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 06:52:44,671 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 06:52:44,671 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 06:52:44,672 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 06:52:44,672 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 06:52:44,672 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 06:52:44,672 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 06:52:44,673 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 06:52:44,673 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 06:52:44,673 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 06:52:44,673 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 06:52:44,673 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 06:52:44,673 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 06:52:44,673 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 06:52:44,674 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 06:52:44,674 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 06:52:44,674 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 06:52:44,674 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 06:52:44,674 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 06:52:44,674 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 06:52:44,674 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 06:52:44,675 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 06:52:44,675 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 06:52:44,675 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 06:52:44,675 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 06:52:44,675 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 06:52:44,675 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 06:52:44,676 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 06:52:44,676 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 06:52:44,676 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 06:52:44,676 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 06:52:44,984 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 06:52:45,002 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 06:52:45,004 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 06:52:45,005 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 06:52:45,008 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 06:52:45,009 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/multiply-verify.wvr.bpl [2021-06-05 06:52:45,009 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/multiply-verify.wvr.bpl' [2021-06-05 06:52:45,042 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 06:52:45,043 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 06:52:45,044 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 06:52:45,044 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 06:52:45,044 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 06:52:45,055 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:52:45" (1/1) ... [2021-06-05 06:52:45,062 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:52:45" (1/1) ... [2021-06-05 06:52:45,068 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 06:52:45,069 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 06:52:45,069 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 06:52:45,069 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 06:52:45,076 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:52:45" (1/1) ... [2021-06-05 06:52:45,076 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:52:45" (1/1) ... [2021-06-05 06:52:45,077 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:52:45" (1/1) ... [2021-06-05 06:52:45,077 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:52:45" (1/1) ... [2021-06-05 06:52:45,079 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:52:45" (1/1) ... [2021-06-05 06:52:45,082 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:52:45" (1/1) ... [2021-06-05 06:52:45,082 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:52:45" (1/1) ... [2021-06-05 06:52:45,083 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 06:52:45,085 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 06:52:45,085 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 06:52:45,085 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 06:52:45,087 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:52:45" (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 06:52:45,150 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 06:52:45,150 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 06:52:45,151 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 06:52:45,151 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 06:52:45,151 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 06:52:45,151 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 06:52:45,151 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 06:52:45,151 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 06:52:45,152 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 06:52:45,152 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 06:52:45,152 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 06:52:45,152 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 06:52:45,153 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 06:52:45,331 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 06:52:45,331 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 06:52:45,333 INFO L202 PluginConnector]: Adding new model multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 06:52:45 BoogieIcfgContainer [2021-06-05 06:52:45,333 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 06:52:45,335 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 06:52:45,335 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 06:52:45,337 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 06:52:45,337 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:52:45" (1/2) ... [2021-06-05 06:52:45,338 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b52367e and model type multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 06:52:45, skipping insertion in model container [2021-06-05 06:52:45,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 06:52:45" (2/2) ... [2021-06-05 06:52:45,339 INFO L111 eAbstractionObserver]: Analyzing ICFG multiply-verify.wvr.bpl [2021-06-05 06:52:45,344 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 06:52:45,344 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 06:52:45,345 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 06:52:45,345 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 06:52:45,377 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-05 06:52:45,395 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-05 06:52:45,438 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 06:52:45,438 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 06:52:45,438 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 06:52:45,438 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 06:52:45,438 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 06:52:45,438 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 06:52:45,438 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 06:52:45,438 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 06:52:45,446 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 41 places, 33 transitions, 90 flow [2021-06-05 06:52:45,517 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 371 states, 369 states have (on average 2.747967479674797) internal successors, (1014), 370 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:45,522 INFO L276 IsEmpty]: Start isEmpty. Operand has 371 states, 369 states have (on average 2.747967479674797) internal successors, (1014), 370 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:45,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 06:52:45,536 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:52:45,537 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] [2021-06-05 06:52:45,537 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:52:45,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:52:45,542 INFO L82 PathProgramCache]: Analyzing trace with hash -894934944, now seen corresponding path program 1 times [2021-06-05 06:52:45,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:52:45,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076981502] [2021-06-05 06:52:45,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:52:45,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:45,858 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 06:52:45,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:52:45,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076981502] [2021-06-05 06:52:45,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076981502] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 06:52:45,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 06:52:45,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 06:52:45,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910102767] [2021-06-05 06:52:45,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 06:52:45,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:52:45,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 06:52:45,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-06-05 06:52:45,883 INFO L87 Difference]: Start difference. First operand has 371 states, 369 states have (on average 2.747967479674797) internal successors, (1014), 370 states have internal predecessors, (1014), 0 states have call successors, (0), 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 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:46,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:52:46,040 INFO L93 Difference]: Finished difference Result 349 states and 846 transitions. [2021-06-05 06:52:46,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 06:52:46,041 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 06:52:46,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:52:46,052 INFO L225 Difference]: With dead ends: 349 [2021-06-05 06:52:46,053 INFO L226 Difference]: Without dead ends: 311 [2021-06-05 06:52:46,054 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 118.6ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 06:52:46,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-06-05 06:52:46,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 293. [2021-06-05 06:52:46,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 2.482876712328767) internal successors, (725), 292 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:46,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 725 transitions. [2021-06-05 06:52:46,104 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 725 transitions. Word has length 22 [2021-06-05 06:52:46,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:52:46,105 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 725 transitions. [2021-06-05 06:52:46,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:46,105 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 725 transitions. [2021-06-05 06:52:46,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 06:52:46,108 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:52:46,108 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] [2021-06-05 06:52:46,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 06:52:46,108 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:52:46,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:52:46,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1198566966, now seen corresponding path program 2 times [2021-06-05 06:52:46,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:52:46,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879320793] [2021-06-05 06:52:46,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:52:46,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:46,235 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 06:52:46,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:52:46,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879320793] [2021-06-05 06:52:46,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879320793] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 06:52:46,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 06:52:46,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 06:52:46,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379967831] [2021-06-05 06:52:46,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 06:52:46,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:52:46,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 06:52:46,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 06:52:46,238 INFO L87 Difference]: Start difference. First operand 293 states and 725 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:46,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:52:46,360 INFO L93 Difference]: Finished difference Result 333 states and 800 transitions. [2021-06-05 06:52:46,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 06:52:46,361 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 06:52:46,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:52:46,365 INFO L225 Difference]: With dead ends: 333 [2021-06-05 06:52:46,365 INFO L226 Difference]: Without dead ends: 296 [2021-06-05 06:52:46,366 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 81.2ms TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 06:52:46,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-06-05 06:52:46,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 220. [2021-06-05 06:52:46,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.3926940639269407) internal successors, (524), 219 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:46,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 524 transitions. [2021-06-05 06:52:46,398 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 524 transitions. Word has length 22 [2021-06-05 06:52:46,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:52:46,398 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 524 transitions. [2021-06-05 06:52:46,398 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:46,398 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 524 transitions. [2021-06-05 06:52:46,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 06:52:46,404 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:52:46,404 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] [2021-06-05 06:52:46,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 06:52:46,404 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:52:46,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:52:46,406 INFO L82 PathProgramCache]: Analyzing trace with hash -602461050, now seen corresponding path program 3 times [2021-06-05 06:52:46,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:52:46,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912011290] [2021-06-05 06:52:46,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:52:46,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:46,573 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 06:52:46,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:52:46,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912011290] [2021-06-05 06:52:46,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912011290] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 06:52:46,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 06:52:46,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 06:52:46,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542977093] [2021-06-05 06:52:46,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 06:52:46,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:52:46,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 06:52:46,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 06:52:46,580 INFO L87 Difference]: Start difference. First operand 220 states and 524 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:46,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:52:46,652 INFO L93 Difference]: Finished difference Result 320 states and 768 transitions. [2021-06-05 06:52:46,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 06:52:46,653 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 06:52:46,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:52:46,655 INFO L225 Difference]: With dead ends: 320 [2021-06-05 06:52:46,658 INFO L226 Difference]: Without dead ends: 280 [2021-06-05 06:52:46,659 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 73.4ms TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 06:52:46,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-06-05 06:52:46,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 218. [2021-06-05 06:52:46,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.3824884792626726) internal successors, (517), 217 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:46,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 517 transitions. [2021-06-05 06:52:46,677 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 517 transitions. Word has length 22 [2021-06-05 06:52:46,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:52:46,677 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 517 transitions. [2021-06-05 06:52:46,677 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:46,677 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 517 transitions. [2021-06-05 06:52:46,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 06:52:46,678 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:52:46,679 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] [2021-06-05 06:52:46,679 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 06:52:46,679 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:52:46,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:52:46,680 INFO L82 PathProgramCache]: Analyzing trace with hash -630863238, now seen corresponding path program 4 times [2021-06-05 06:52:46,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:52:46,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930118818] [2021-06-05 06:52:46,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:52:46,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:46,855 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 06:52:46,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:52:46,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930118818] [2021-06-05 06:52:46,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930118818] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 06:52:46,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 06:52:46,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 06:52:46,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226567402] [2021-06-05 06:52:46,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 06:52:46,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:52:46,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 06:52:46,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-06-05 06:52:46,876 INFO L87 Difference]: Start difference. First operand 218 states and 517 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:46,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:52:46,950 INFO L93 Difference]: Finished difference Result 327 states and 775 transitions. [2021-06-05 06:52:46,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 06:52:46,951 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 06:52:46,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:52:46,952 INFO L225 Difference]: With dead ends: 327 [2021-06-05 06:52:46,952 INFO L226 Difference]: Without dead ends: 290 [2021-06-05 06:52:46,953 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 109.3ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 06:52:46,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2021-06-05 06:52:46,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 226. [2021-06-05 06:52:46,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 2.3866666666666667) internal successors, (537), 225 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:46,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 537 transitions. [2021-06-05 06:52:46,960 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 537 transitions. Word has length 22 [2021-06-05 06:52:46,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:52:46,960 INFO L482 AbstractCegarLoop]: Abstraction has 226 states and 537 transitions. [2021-06-05 06:52:46,960 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:46,960 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 537 transitions. [2021-06-05 06:52:46,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 06:52:46,961 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:52:46,961 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] [2021-06-05 06:52:46,961 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 06:52:46,961 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:52:46,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:52:46,962 INFO L82 PathProgramCache]: Analyzing trace with hash -2144128130, now seen corresponding path program 5 times [2021-06-05 06:52:46,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:52:46,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726265531] [2021-06-05 06:52:46,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:52:46,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:47,081 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 06:52:47,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:52:47,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726265531] [2021-06-05 06:52:47,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726265531] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 06:52:47,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 06:52:47,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 06:52:47,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427539463] [2021-06-05 06:52:47,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 06:52:47,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:52:47,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 06:52:47,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 06:52:47,083 INFO L87 Difference]: Start difference. First operand 226 states and 537 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:47,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:52:47,160 INFO L93 Difference]: Finished difference Result 333 states and 810 transitions. [2021-06-05 06:52:47,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 06:52:47,160 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 06:52:47,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:52:47,162 INFO L225 Difference]: With dead ends: 333 [2021-06-05 06:52:47,162 INFO L226 Difference]: Without dead ends: 296 [2021-06-05 06:52:47,163 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 65.2ms TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 06:52:47,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-06-05 06:52:47,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 242. [2021-06-05 06:52:47,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 2.4356846473029043) internal successors, (587), 241 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:47,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 587 transitions. [2021-06-05 06:52:47,171 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 587 transitions. Word has length 22 [2021-06-05 06:52:47,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:52:47,172 INFO L482 AbstractCegarLoop]: Abstraction has 242 states and 587 transitions. [2021-06-05 06:52:47,172 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:47,172 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 587 transitions. [2021-06-05 06:52:47,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 06:52:47,172 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:52:47,173 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] [2021-06-05 06:52:47,173 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 06:52:47,173 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:52:47,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:52:47,173 INFO L82 PathProgramCache]: Analyzing trace with hash 909995578, now seen corresponding path program 6 times [2021-06-05 06:52:47,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:52:47,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21742870] [2021-06-05 06:52:47,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:52:47,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:47,293 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 06:52:47,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:52:47,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21742870] [2021-06-05 06:52:47,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21742870] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 06:52:47,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 06:52:47,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 06:52:47,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824379982] [2021-06-05 06:52:47,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 06:52:47,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:52:47,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 06:52:47,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 06:52:47,296 INFO L87 Difference]: Start difference. First operand 242 states and 587 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:47,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:52:47,365 INFO L93 Difference]: Finished difference Result 337 states and 817 transitions. [2021-06-05 06:52:47,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 06:52:47,365 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 06:52:47,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:52:47,367 INFO L225 Difference]: With dead ends: 337 [2021-06-05 06:52:47,367 INFO L226 Difference]: Without dead ends: 297 [2021-06-05 06:52:47,367 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 74.9ms TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 06:52:47,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-06-05 06:52:47,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 224. [2021-06-05 06:52:47,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.3856502242152464) internal successors, (532), 223 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:47,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 532 transitions. [2021-06-05 06:52:47,373 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 532 transitions. Word has length 22 [2021-06-05 06:52:47,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:52:47,374 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 532 transitions. [2021-06-05 06:52:47,374 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:47,374 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 532 transitions. [2021-06-05 06:52:47,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 06:52:47,374 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:52:47,375 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 06:52:47,375 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-05 06:52:47,375 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:52:47,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:52:47,375 INFO L82 PathProgramCache]: Analyzing trace with hash 2086549228, now seen corresponding path program 1 times [2021-06-05 06:52:47,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:52:47,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160437447] [2021-06-05 06:52:47,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:52:47,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:47,398 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 06:52:47,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:52:47,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160437447] [2021-06-05 06:52:47,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160437447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:47,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216787861] [2021-06-05 06:52:47,399 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 06:52:47,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:47,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 06:52:47,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:52:47,524 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 06:52:47,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216787861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:47,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:52:47,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 06:52:47,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083227824] [2021-06-05 06:52:47,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 06:52:47,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:52:47,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 06:52:47,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 06:52:47,525 INFO L87 Difference]: Start difference. First operand 224 states and 532 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:47,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:52:47,596 INFO L93 Difference]: Finished difference Result 342 states and 809 transitions. [2021-06-05 06:52:47,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 06:52:47,597 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 06:52:47,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:52:47,598 INFO L225 Difference]: With dead ends: 342 [2021-06-05 06:52:47,598 INFO L226 Difference]: Without dead ends: 342 [2021-06-05 06:52:47,599 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 45.1ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-05 06:52:47,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2021-06-05 06:52:47,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 213. [2021-06-05 06:52:47,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.4245283018867925) internal successors, (514), 212 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 06:52:47,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 514 transitions. [2021-06-05 06:52:47,605 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 514 transitions. Word has length 25 [2021-06-05 06:52:47,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:52:47,605 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 514 transitions. [2021-06-05 06:52:47,605 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:47,605 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 514 transitions. [2021-06-05 06:52:47,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 06:52:47,606 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:52:47,606 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 06:52:47,830 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-06-05 06:52:47,830 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:52:47,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:52:47,831 INFO L82 PathProgramCache]: Analyzing trace with hash 785545354, now seen corresponding path program 1 times [2021-06-05 06:52:47,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:52:47,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830378844] [2021-06-05 06:52:47,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:52:47,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:47,852 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 06:52:47,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:52:47,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830378844] [2021-06-05 06:52:47,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830378844] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 06:52:47,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 06:52:47,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 06:52:47,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401640880] [2021-06-05 06:52:47,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 06:52:47,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:52:47,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 06:52:47,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 06:52:47,854 INFO L87 Difference]: Start difference. First operand 213 states and 514 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:47,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:52:47,909 INFO L93 Difference]: Finished difference Result 361 states and 847 transitions. [2021-06-05 06:52:47,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 06:52:47,909 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 06:52:47,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:52:47,913 INFO L225 Difference]: With dead ends: 361 [2021-06-05 06:52:47,914 INFO L226 Difference]: Without dead ends: 337 [2021-06-05 06:52:47,914 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 28.4ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 06:52:47,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-06-05 06:52:47,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 213. [2021-06-05 06:52:47,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.400943396226415) internal successors, (509), 212 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:47,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 509 transitions. [2021-06-05 06:52:47,920 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 509 transitions. Word has length 25 [2021-06-05 06:52:47,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:52:47,921 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 509 transitions. [2021-06-05 06:52:47,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:47,921 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 509 transitions. [2021-06-05 06:52:47,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 06:52:47,923 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:52:47,923 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 06:52:47,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-05 06:52:47,923 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:52:47,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:52:47,924 INFO L82 PathProgramCache]: Analyzing trace with hash 727801610, now seen corresponding path program 2 times [2021-06-05 06:52:47,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:52:47,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222399913] [2021-06-05 06:52:47,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:52:47,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:47,957 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 06:52:47,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:52:47,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222399913] [2021-06-05 06:52:47,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222399913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:47,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742207178] [2021-06-05 06:52:47,958 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 06:52:48,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:52:48,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:52:48,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 06:52:48,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:52:48,098 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 06:52:48,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742207178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:48,098 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:52:48,098 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 06:52:48,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415128872] [2021-06-05 06:52:48,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 06:52:48,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:52:48,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 06:52:48,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 06:52:48,101 INFO L87 Difference]: Start difference. First operand 213 states and 509 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:48,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:52:48,205 INFO L93 Difference]: Finished difference Result 495 states and 1157 transitions. [2021-06-05 06:52:48,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 06:52:48,206 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have 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 06:52:48,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:52:48,208 INFO L225 Difference]: With dead ends: 495 [2021-06-05 06:52:48,208 INFO L226 Difference]: Without dead ends: 495 [2021-06-05 06:52:48,208 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 65.2ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:52:48,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-06-05 06:52:48,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 221. [2021-06-05 06:52:48,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.4318181818181817) internal successors, (535), 220 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:48,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 535 transitions. [2021-06-05 06:52:48,216 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 535 transitions. Word has length 25 [2021-06-05 06:52:48,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:52:48,217 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 535 transitions. [2021-06-05 06:52:48,217 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:48,217 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 535 transitions. [2021-06-05 06:52:48,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 06:52:48,218 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:52:48,218 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 06:52:48,434 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:52:48,435 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:52:48,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:52:48,435 INFO L82 PathProgramCache]: Analyzing trace with hash 517104564, now seen corresponding path program 2 times [2021-06-05 06:52:48,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:52:48,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985830850] [2021-06-05 06:52:48,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:52:48,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:48,460 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 06:52:48,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:52:48,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985830850] [2021-06-05 06:52:48,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985830850] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 06:52:48,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 06:52:48,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 06:52:48,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972833650] [2021-06-05 06:52:48,461 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 06:52:48,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:52:48,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 06:52:48,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 06:52:48,462 INFO L87 Difference]: Start difference. First operand 221 states and 535 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:48,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:52:48,516 INFO L93 Difference]: Finished difference Result 341 states and 802 transitions. [2021-06-05 06:52:48,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 06:52:48,516 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 06:52:48,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:52:48,518 INFO L225 Difference]: With dead ends: 341 [2021-06-05 06:52:48,518 INFO L226 Difference]: Without dead ends: 335 [2021-06-05 06:52:48,518 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 28.7ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 06:52:48,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-06-05 06:52:48,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 245. [2021-06-05 06:52:48,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 2.4385245901639343) internal successors, (595), 244 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:48,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 595 transitions. [2021-06-05 06:52:48,526 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 595 transitions. Word has length 25 [2021-06-05 06:52:48,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:52:48,526 INFO L482 AbstractCegarLoop]: Abstraction has 245 states and 595 transitions. [2021-06-05 06:52:48,526 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:48,526 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 595 transitions. [2021-06-05 06:52:48,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 06:52:48,527 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:52:48,527 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 06:52:48,527 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-06-05 06:52:48,527 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:52:48,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:52:48,528 INFO L82 PathProgramCache]: Analyzing trace with hash 1245856382, now seen corresponding path program 3 times [2021-06-05 06:52:48,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:52:48,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443606969] [2021-06-05 06:52:48,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:52:48,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:48,548 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 06:52:48,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:52:48,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443606969] [2021-06-05 06:52:48,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443606969] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 06:52:48,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 06:52:48,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 06:52:48,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410925446] [2021-06-05 06:52:48,549 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 06:52:48,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:52:48,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 06:52:48,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 06:52:48,550 INFO L87 Difference]: Start difference. First operand 245 states and 595 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:48,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:52:48,615 INFO L93 Difference]: Finished difference Result 284 states and 686 transitions. [2021-06-05 06:52:48,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 06:52:48,616 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 06:52:48,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:52:48,617 INFO L225 Difference]: With dead ends: 284 [2021-06-05 06:52:48,617 INFO L226 Difference]: Without dead ends: 284 [2021-06-05 06:52:48,618 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 26.1ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 06:52:48,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-06-05 06:52:48,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 221. [2021-06-05 06:52:48,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.422727272727273) internal successors, (533), 220 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:48,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 533 transitions. [2021-06-05 06:52:48,623 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 533 transitions. Word has length 25 [2021-06-05 06:52:48,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:52:48,623 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 533 transitions. [2021-06-05 06:52:48,623 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:48,624 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 533 transitions. [2021-06-05 06:52:48,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 06:52:48,624 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:52:48,624 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 06:52:48,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-06-05 06:52:48,625 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:52:48,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:52:48,625 INFO L82 PathProgramCache]: Analyzing trace with hash 868885228, now seen corresponding path program 3 times [2021-06-05 06:52:48,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:52:48,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710067797] [2021-06-05 06:52:48,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:52:48,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:48,644 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 06:52:48,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:52:48,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710067797] [2021-06-05 06:52:48,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710067797] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 06:52:48,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 06:52:48,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 06:52:48,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549779538] [2021-06-05 06:52:48,645 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 06:52:48,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:52:48,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 06:52:48,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 06:52:48,645 INFO L87 Difference]: Start difference. First operand 221 states and 533 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:48,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:52:48,709 INFO L93 Difference]: Finished difference Result 394 states and 930 transitions. [2021-06-05 06:52:48,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 06:52:48,709 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 06:52:48,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:52:48,711 INFO L225 Difference]: With dead ends: 394 [2021-06-05 06:52:48,711 INFO L226 Difference]: Without dead ends: 387 [2021-06-05 06:52:48,711 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 32.4ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 06:52:48,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-06-05 06:52:48,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 221. [2021-06-05 06:52:48,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.4136363636363636) internal successors, (531), 220 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:48,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 531 transitions. [2021-06-05 06:52:48,717 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 531 transitions. Word has length 25 [2021-06-05 06:52:48,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:52:48,717 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 531 transitions. [2021-06-05 06:52:48,717 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:48,717 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 531 transitions. [2021-06-05 06:52:48,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 06:52:48,718 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:52:48,718 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 06:52:48,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-06-05 06:52:48,718 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:52:48,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:52:48,719 INFO L82 PathProgramCache]: Analyzing trace with hash -241548014, now seen corresponding path program 4 times [2021-06-05 06:52:48,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:52:48,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900476994] [2021-06-05 06:52:48,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:52:48,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:48,738 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 06:52:48,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:52:48,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900476994] [2021-06-05 06:52:48,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900476994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:48,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993216147] [2021-06-05 06:52:48,739 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 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 06:52:48,778 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:52:48,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:52:48,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 06:52:48,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:52:48,833 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 06:52:48,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993216147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:48,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:52:48,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 06:52:48,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897008598] [2021-06-05 06:52:48,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 06:52:48,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:52:48,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 06:52:48,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 06:52:48,834 INFO L87 Difference]: Start difference. First operand 221 states and 531 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:48,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:52:48,911 INFO L93 Difference]: Finished difference Result 340 states and 811 transitions. [2021-06-05 06:52:48,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 06:52:48,911 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 06:52:48,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:52:48,913 INFO L225 Difference]: With dead ends: 340 [2021-06-05 06:52:48,913 INFO L226 Difference]: Without dead ends: 340 [2021-06-05 06:52:48,913 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 44.0ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-05 06:52:48,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-06-05 06:52:48,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 209. [2021-06-05 06:52:48,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.4278846153846154) internal successors, (505), 208 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:48,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 505 transitions. [2021-06-05 06:52:48,919 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 505 transitions. Word has length 25 [2021-06-05 06:52:48,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:52:48,919 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 505 transitions. [2021-06-05 06:52:48,920 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:48,920 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 505 transitions. [2021-06-05 06:52:48,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 06:52:48,920 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:52:48,921 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 06:52:49,143 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-06-05 06:52:49,143 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:52:49,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:52:49,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1742404094, now seen corresponding path program 4 times [2021-06-05 06:52:49,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:52:49,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744377912] [2021-06-05 06:52:49,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:52:49,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:49,161 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 06:52:49,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:52:49,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744377912] [2021-06-05 06:52:49,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744377912] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 06:52:49,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 06:52:49,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 06:52:49,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285176596] [2021-06-05 06:52:49,162 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 06:52:49,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:52:49,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 06:52:49,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 06:52:49,162 INFO L87 Difference]: Start difference. First operand 209 states and 505 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:49,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:52:49,207 INFO L93 Difference]: Finished difference Result 348 states and 822 transitions. [2021-06-05 06:52:49,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 06:52:49,207 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 06:52:49,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:52:49,209 INFO L225 Difference]: With dead ends: 348 [2021-06-05 06:52:49,209 INFO L226 Difference]: Without dead ends: 330 [2021-06-05 06:52:49,209 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 24.2ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 06:52:49,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-06-05 06:52:49,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 209. [2021-06-05 06:52:49,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.4086538461538463) internal successors, (501), 208 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:49,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 501 transitions. [2021-06-05 06:52:49,214 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 501 transitions. Word has length 25 [2021-06-05 06:52:49,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:52:49,214 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 501 transitions. [2021-06-05 06:52:49,214 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:49,214 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 501 transitions. [2021-06-05 06:52:49,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 06:52:49,215 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:52:49,215 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 06:52:49,215 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-06-05 06:52:49,215 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:52:49,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:52:49,216 INFO L82 PathProgramCache]: Analyzing trace with hash 2089386992, now seen corresponding path program 5 times [2021-06-05 06:52:49,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:52:49,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140196441] [2021-06-05 06:52:49,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:52:49,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:49,233 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 06:52:49,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:52:49,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140196441] [2021-06-05 06:52:49,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140196441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:49,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410714407] [2021-06-05 06:52:49,234 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 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 06:52:49,271 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:52:49,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:52:49,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 06:52:49,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:52:49,337 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 06:52:49,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410714407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:49,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:52:49,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 06:52:49,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370224502] [2021-06-05 06:52:49,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 06:52:49,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:52:49,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 06:52:49,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 06:52:49,339 INFO L87 Difference]: Start difference. First operand 209 states and 501 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:49,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:52:49,420 INFO L93 Difference]: Finished difference Result 379 states and 891 transitions. [2021-06-05 06:52:49,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 06:52:49,420 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have 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 06:52:49,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:52:49,422 INFO L225 Difference]: With dead ends: 379 [2021-06-05 06:52:49,422 INFO L226 Difference]: Without dead ends: 379 [2021-06-05 06:52:49,423 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 50.0ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:52:49,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-06-05 06:52:49,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 209. [2021-06-05 06:52:49,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.4086538461538463) internal successors, (501), 208 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:49,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 501 transitions. [2021-06-05 06:52:49,429 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 501 transitions. Word has length 25 [2021-06-05 06:52:49,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:52:49,429 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 501 transitions. [2021-06-05 06:52:49,429 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:49,429 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 501 transitions. [2021-06-05 06:52:49,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 06:52:49,430 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:52:49,430 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 06:52:49,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:52:49,641 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:52:49,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:52:49,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1878689946, now seen corresponding path program 5 times [2021-06-05 06:52:49,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:52:49,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521485017] [2021-06-05 06:52:49,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:52:49,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:49,672 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 06:52:49,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:52:49,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521485017] [2021-06-05 06:52:49,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521485017] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 06:52:49,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 06:52:49,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 06:52:49,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678607606] [2021-06-05 06:52:49,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 06:52:49,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:52:49,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 06:52:49,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 06:52:49,674 INFO L87 Difference]: Start difference. First operand 209 states and 501 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:49,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:52:49,735 INFO L93 Difference]: Finished difference Result 381 states and 892 transitions. [2021-06-05 06:52:49,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 06:52:49,736 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 06:52:49,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:52:49,738 INFO L225 Difference]: With dead ends: 381 [2021-06-05 06:52:49,738 INFO L226 Difference]: Without dead ends: 375 [2021-06-05 06:52:49,738 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 30.1ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 06:52:49,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-06-05 06:52:49,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 233. [2021-06-05 06:52:49,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 2.418103448275862) internal successors, (561), 232 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:49,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 561 transitions. [2021-06-05 06:52:49,745 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 561 transitions. Word has length 25 [2021-06-05 06:52:49,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:52:49,745 INFO L482 AbstractCegarLoop]: Abstraction has 233 states and 561 transitions. [2021-06-05 06:52:49,745 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:49,746 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 561 transitions. [2021-06-05 06:52:49,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 06:52:49,746 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:52:49,746 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 06:52:49,746 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-06-05 06:52:49,747 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:52:49,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:52:49,748 INFO L82 PathProgramCache]: Analyzing trace with hash -1687525532, now seen corresponding path program 6 times [2021-06-05 06:52:49,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:52:49,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035983531] [2021-06-05 06:52:49,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:52:49,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:49,772 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 06:52:49,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:52:49,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035983531] [2021-06-05 06:52:49,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035983531] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 06:52:49,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 06:52:49,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 06:52:49,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723261582] [2021-06-05 06:52:49,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 06:52:49,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:52:49,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 06:52:49,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 06:52:49,774 INFO L87 Difference]: Start difference. First operand 233 states and 561 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:49,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:52:49,830 INFO L93 Difference]: Finished difference Result 311 states and 744 transitions. [2021-06-05 06:52:49,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 06:52:49,830 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 06:52:49,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:52:49,831 INFO L225 Difference]: With dead ends: 311 [2021-06-05 06:52:49,831 INFO L226 Difference]: Without dead ends: 311 [2021-06-05 06:52:49,832 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 30.8ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 06:52:49,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-06-05 06:52:49,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 209. [2021-06-05 06:52:49,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.3990384615384617) internal successors, (499), 208 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:49,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 499 transitions. [2021-06-05 06:52:49,836 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 499 transitions. Word has length 25 [2021-06-05 06:52:49,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:52:49,837 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 499 transitions. [2021-06-05 06:52:49,837 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:49,837 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 499 transitions. [2021-06-05 06:52:49,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 06:52:49,837 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:52:49,837 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 06:52:49,837 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-06-05 06:52:49,838 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:52:49,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:52:49,838 INFO L82 PathProgramCache]: Analyzing trace with hash -2064496686, now seen corresponding path program 6 times [2021-06-05 06:52:49,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:52:49,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096549259] [2021-06-05 06:52:49,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:52:49,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:49,864 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 06:52:49,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:52:49,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096549259] [2021-06-05 06:52:49,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096549259] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 06:52:49,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 06:52:49,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 06:52:49,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123720863] [2021-06-05 06:52:49,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 06:52:49,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:52:49,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 06:52:49,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 06:52:49,866 INFO L87 Difference]: Start difference. First operand 209 states and 499 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:49,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:52:49,911 INFO L93 Difference]: Finished difference Result 256 states and 607 transitions. [2021-06-05 06:52:49,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 06:52:49,911 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 06:52:49,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:52:49,912 INFO L225 Difference]: With dead ends: 256 [2021-06-05 06:52:49,912 INFO L226 Difference]: Without dead ends: 249 [2021-06-05 06:52:49,913 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 24.0ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 06:52:49,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-06-05 06:52:49,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 207. [2021-06-05 06:52:49,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 2.3883495145631066) internal successors, (492), 206 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:49,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 492 transitions. [2021-06-05 06:52:49,918 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 492 transitions. Word has length 25 [2021-06-05 06:52:49,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:52:49,918 INFO L482 AbstractCegarLoop]: Abstraction has 207 states and 492 transitions. [2021-06-05 06:52:49,918 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:49,918 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 492 transitions. [2021-06-05 06:52:49,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:52:49,918 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:52:49,918 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, 1] [2021-06-05 06:52:49,919 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-06-05 06:52:49,919 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:52:49,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:52:49,919 INFO L82 PathProgramCache]: Analyzing trace with hash -2038135170, now seen corresponding path program 1 times [2021-06-05 06:52:49,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:52:49,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017691139] [2021-06-05 06:52:49,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:52:49,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:50,072 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 06:52:50,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:52:50,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017691139] [2021-06-05 06:52:50,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017691139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:50,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391822486] [2021-06-05 06:52:50,073 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 06:52:50,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:50,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 06:52:50,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:52:50,205 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 06:52:50,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391822486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:50,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:52:50,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 06:52:50,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103915825] [2021-06-05 06:52:50,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 06:52:50,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:52:50,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 06:52:50,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:52:50,206 INFO L87 Difference]: Start difference. First operand 207 states and 492 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:50,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:52:50,304 INFO L93 Difference]: Finished difference Result 387 states and 917 transitions. [2021-06-05 06:52:50,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 06:52:50,304 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:52:50,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:52:50,306 INFO L225 Difference]: With dead ends: 387 [2021-06-05 06:52:50,306 INFO L226 Difference]: Without dead ends: 349 [2021-06-05 06:52:50,306 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 130.9ms TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:52:50,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-06-05 06:52:50,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 246. [2021-06-05 06:52:50,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.3510204081632655) internal successors, (576), 245 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:50,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 576 transitions. [2021-06-05 06:52:50,312 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 576 transitions. Word has length 28 [2021-06-05 06:52:50,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:52:50,313 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 576 transitions. [2021-06-05 06:52:50,313 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:50,313 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 576 transitions. [2021-06-05 06:52:50,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:52:50,313 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:52:50,314 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, 1] [2021-06-05 06:52:50,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:52:50,533 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:52:50,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:52:50,533 INFO L82 PathProgramCache]: Analyzing trace with hash -957499002, now seen corresponding path program 2 times [2021-06-05 06:52:50,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:52:50,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514456876] [2021-06-05 06:52:50,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:52:50,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:50,647 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 06:52:50,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:52:50,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514456876] [2021-06-05 06:52:50,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514456876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:50,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107675987] [2021-06-05 06:52:50,648 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 06:52:50,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:52:50,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:52:50,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 06:52:50,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:52:50,776 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 06:52:50,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107675987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:50,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:52:50,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 06:52:50,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353233581] [2021-06-05 06:52:50,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 06:52:50,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:52:50,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 06:52:50,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:52:50,779 INFO L87 Difference]: Start difference. First operand 246 states and 576 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:50,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:52:50,914 INFO L93 Difference]: Finished difference Result 496 states and 1252 transitions. [2021-06-05 06:52:50,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 06:52:50,914 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:52:50,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:52:50,917 INFO L225 Difference]: With dead ends: 496 [2021-06-05 06:52:50,917 INFO L226 Difference]: Without dead ends: 459 [2021-06-05 06:52:50,918 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 125.4ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:52:50,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2021-06-05 06:52:50,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 337. [2021-06-05 06:52:50,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 2.4791666666666665) internal successors, (833), 336 states have internal predecessors, (833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:50,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 833 transitions. [2021-06-05 06:52:50,928 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 833 transitions. Word has length 28 [2021-06-05 06:52:50,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:52:50,928 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 833 transitions. [2021-06-05 06:52:50,928 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:50,928 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 833 transitions. [2021-06-05 06:52:50,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:52:50,929 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:52:50,929 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, 1] [2021-06-05 06:52:51,146 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:52:51,146 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:52:51,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:52:51,147 INFO L82 PathProgramCache]: Analyzing trace with hash -361393086, now seen corresponding path program 3 times [2021-06-05 06:52:51,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:52:51,147 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941631075] [2021-06-05 06:52:51,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:52:51,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:51,237 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 06:52:51,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:52:51,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941631075] [2021-06-05 06:52:51,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941631075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:51,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149772045] [2021-06-05 06:52:51,237 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 06:52:51,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 06:52:51,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:52:51,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 06:52:51,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:52:51,374 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 06:52:51,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149772045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:51,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:52:51,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 06:52:51,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347511006] [2021-06-05 06:52:51,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 06:52:51,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:52:51,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 06:52:51,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:52:51,377 INFO L87 Difference]: Start difference. First operand 337 states and 833 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:51,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:52:51,497 INFO L93 Difference]: Finished difference Result 504 states and 1265 transitions. [2021-06-05 06:52:51,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 06:52:51,498 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:52:51,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:52:51,500 INFO L225 Difference]: With dead ends: 504 [2021-06-05 06:52:51,500 INFO L226 Difference]: Without dead ends: 462 [2021-06-05 06:52:51,501 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 109.5ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:52:51,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-06-05 06:52:51,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 331. [2021-06-05 06:52:51,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 2.4727272727272727) internal successors, (816), 330 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:51,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 816 transitions. [2021-06-05 06:52:51,509 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 816 transitions. Word has length 28 [2021-06-05 06:52:51,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:52:51,509 INFO L482 AbstractCegarLoop]: Abstraction has 331 states and 816 transitions. [2021-06-05 06:52:51,509 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:51,509 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 816 transitions. [2021-06-05 06:52:51,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:52:51,510 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:52:51,510 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, 1] [2021-06-05 06:52:51,733 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:52:51,733 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:52:51,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:52:51,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1418916614, now seen corresponding path program 4 times [2021-06-05 06:52:51,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:52:51,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634783444] [2021-06-05 06:52:51,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:52:51,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:51,823 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 06:52:51,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:52:51,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634783444] [2021-06-05 06:52:51,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634783444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:51,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104954267] [2021-06-05 06:52:51,824 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 06:52:51,850 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:52:51,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:52:51,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 06:52:51,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:52:51,970 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 06:52:51,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104954267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:51,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:52:51,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 06:52:51,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115955030] [2021-06-05 06:52:51,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 06:52:51,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:52:51,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 06:52:51,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:52:51,974 INFO L87 Difference]: Start difference. First operand 331 states and 816 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:52,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:52:52,086 INFO L93 Difference]: Finished difference Result 519 states and 1295 transitions. [2021-06-05 06:52:52,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 06:52:52,086 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:52:52,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:52:52,089 INFO L225 Difference]: With dead ends: 519 [2021-06-05 06:52:52,089 INFO L226 Difference]: Without dead ends: 481 [2021-06-05 06:52:52,090 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 107.1ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:52:52,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-06-05 06:52:52,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 349. [2021-06-05 06:52:52,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 2.4913793103448274) internal successors, (867), 348 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:52,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 867 transitions. [2021-06-05 06:52:52,099 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 867 transitions. Word has length 28 [2021-06-05 06:52:52,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:52:52,100 INFO L482 AbstractCegarLoop]: Abstraction has 349 states and 867 transitions. [2021-06-05 06:52:52,100 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:52,101 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 867 transitions. [2021-06-05 06:52:52,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:52:52,102 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:52:52,102 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, 1] [2021-06-05 06:52:52,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-06-05 06:52:52,324 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:52:52,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:52:52,324 INFO L82 PathProgramCache]: Analyzing trace with hash -1124070530, now seen corresponding path program 5 times [2021-06-05 06:52:52,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:52:52,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510567026] [2021-06-05 06:52:52,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:52:52,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:52,455 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 06:52:52,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:52:52,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510567026] [2021-06-05 06:52:52,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510567026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:52,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866479025] [2021-06-05 06:52:52,456 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 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 06:52:52,491 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:52:52,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:52:52,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 06:52:52,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:52:52,617 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 06:52:52,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866479025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:52,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:52:52,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 06:52:52,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871098550] [2021-06-05 06:52:52,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:52:52,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:52:52,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:52:52,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:52:52,619 INFO L87 Difference]: Start difference. First operand 349 states and 867 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 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 06:52:52,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:52:52,750 INFO L93 Difference]: Finished difference Result 530 states and 1325 transitions. [2021-06-05 06:52:52,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 06:52:52,750 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 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 28 [2021-06-05 06:52:52,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:52:52,753 INFO L225 Difference]: With dead ends: 530 [2021-06-05 06:52:52,753 INFO L226 Difference]: Without dead ends: 493 [2021-06-05 06:52:52,754 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 133.5ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:52:52,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2021-06-05 06:52:52,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 439. [2021-06-05 06:52:52,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 438 states have (on average 2.5525114155251143) internal successors, (1118), 438 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:52,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 1118 transitions. [2021-06-05 06:52:52,765 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 1118 transitions. Word has length 28 [2021-06-05 06:52:52,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:52:52,765 INFO L482 AbstractCegarLoop]: Abstraction has 439 states and 1118 transitions. [2021-06-05 06:52:52,765 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 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 06:52:52,765 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 1118 transitions. [2021-06-05 06:52:52,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:52:52,766 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:52:52,766 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, 1] [2021-06-05 06:52:52,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:52:52,989 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:52:52,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:52:52,989 INFO L82 PathProgramCache]: Analyzing trace with hash 152433534, now seen corresponding path program 6 times [2021-06-05 06:52:52,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:52:52,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521456496] [2021-06-05 06:52:52,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:52:52,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:53,081 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 06:52:53,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:52:53,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521456496] [2021-06-05 06:52:53,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521456496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:53,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466259239] [2021-06-05 06:52:53,082 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 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 06:52:53,112 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:52:53,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:52:53,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 06:52:53,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:52:53,197 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 06:52:53,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466259239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:53,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:52:53,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 10 [2021-06-05 06:52:53,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489879582] [2021-06-05 06:52:53,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 06:52:53,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:52:53,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 06:52:53,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:52:53,198 INFO L87 Difference]: Start difference. First operand 439 states and 1118 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) 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 06:52:53,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:52:53,293 INFO L93 Difference]: Finished difference Result 526 states and 1316 transitions. [2021-06-05 06:52:53,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 06:52:53,294 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) 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 28 [2021-06-05 06:52:53,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:52:53,296 INFO L225 Difference]: With dead ends: 526 [2021-06-05 06:52:53,296 INFO L226 Difference]: Without dead ends: 486 [2021-06-05 06:52:53,296 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 97.3ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:52:53,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-06-05 06:52:53,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 429. [2021-06-05 06:52:53,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 2.5490654205607477) internal successors, (1091), 428 states have internal predecessors, (1091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:53,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 1091 transitions. [2021-06-05 06:52:53,307 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 1091 transitions. Word has length 28 [2021-06-05 06:52:53,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:52:53,307 INFO L482 AbstractCegarLoop]: Abstraction has 429 states and 1091 transitions. [2021-06-05 06:52:53,307 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.1818181818181817) 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 06:52:53,307 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 1091 transitions. [2021-06-05 06:52:53,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:52:53,308 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:52:53,308 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, 1] [2021-06-05 06:52:53,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:52:53,521 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:52:53,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:52:53,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1703038790, now seen corresponding path program 7 times [2021-06-05 06:52:53,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:52:53,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97833362] [2021-06-05 06:52:53,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:52:53,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:53,615 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 06:52:53,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:52:53,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97833362] [2021-06-05 06:52:53,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97833362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:53,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468251039] [2021-06-05 06:52:53,615 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 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 06:52:53,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:53,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 06:52:53,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:52:53,769 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 06:52:53,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468251039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:53,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:52:53,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 06:52:53,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343471899] [2021-06-05 06:52:53,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:52:53,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:52:53,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:52:53,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:52:53,771 INFO L87 Difference]: Start difference. First operand 429 states and 1091 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 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 06:52:53,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:52:53,889 INFO L93 Difference]: Finished difference Result 623 states and 1567 transitions. [2021-06-05 06:52:53,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 06:52:53,889 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 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 28 [2021-06-05 06:52:53,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:52:53,891 INFO L225 Difference]: With dead ends: 623 [2021-06-05 06:52:53,891 INFO L226 Difference]: Without dead ends: 585 [2021-06-05 06:52:53,892 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 120.7ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:52:53,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-06-05 06:52:53,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 479. [2021-06-05 06:52:53,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 478 states have (on average 2.598326359832636) internal successors, (1242), 478 states have internal predecessors, (1242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:53,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 1242 transitions. [2021-06-05 06:52:53,903 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 1242 transitions. Word has length 28 [2021-06-05 06:52:53,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:52:53,903 INFO L482 AbstractCegarLoop]: Abstraction has 479 states and 1242 transitions. [2021-06-05 06:52:53,903 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 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 06:52:53,903 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 1242 transitions. [2021-06-05 06:52:53,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:52:53,904 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:52:53,904 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, 1] [2021-06-05 06:52:54,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-05 06:52:54,121 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:52:54,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:52:54,121 INFO L82 PathProgramCache]: Analyzing trace with hash -908403066, now seen corresponding path program 8 times [2021-06-05 06:52:54,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:52:54,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872114603] [2021-06-05 06:52:54,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:52:54,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:54,248 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 06:52:54,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:52:54,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872114603] [2021-06-05 06:52:54,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872114603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:54,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122194212] [2021-06-05 06:52:54,249 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 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 06:52:54,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:52:54,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:52:54,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 06:52:54,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:52:54,365 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 06:52:54,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122194212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:54,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:52:54,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 06:52:54,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125274192] [2021-06-05 06:52:54,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 06:52:54,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:52:54,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 06:52:54,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:52:54,367 INFO L87 Difference]: Start difference. First operand 479 states and 1242 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:54,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:52:54,450 INFO L93 Difference]: Finished difference Result 774 states and 2027 transitions. [2021-06-05 06:52:54,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 06:52:54,450 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:52:54,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:52:54,453 INFO L225 Difference]: With dead ends: 774 [2021-06-05 06:52:54,453 INFO L226 Difference]: Without dead ends: 737 [2021-06-05 06:52:54,453 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 117.1ms TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:52:54,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 737 states. [2021-06-05 06:52:54,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 737 to 491. [2021-06-05 06:52:54,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 490 states have (on average 2.595918367346939) internal successors, (1272), 490 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:54,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 1272 transitions. [2021-06-05 06:52:54,466 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 1272 transitions. Word has length 28 [2021-06-05 06:52:54,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:52:54,466 INFO L482 AbstractCegarLoop]: Abstraction has 491 states and 1272 transitions. [2021-06-05 06:52:54,466 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:54,466 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 1272 transitions. [2021-06-05 06:52:54,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:52:54,467 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:52:54,467 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, 1] [2021-06-05 06:52:54,682 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-05 06:52:54,682 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:52:54,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:52:54,682 INFO L82 PathProgramCache]: Analyzing trace with hash 1688905474, now seen corresponding path program 9 times [2021-06-05 06:52:54,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:52:54,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783291027] [2021-06-05 06:52:54,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:52:54,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:54,782 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 06:52:54,783 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:52:54,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783291027] [2021-06-05 06:52:54,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783291027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:54,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157687847] [2021-06-05 06:52:54,783 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 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 06:52:54,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 06:52:54,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:52:54,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 06:52:54,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:52:54,914 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 06:52:54,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157687847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:54,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:52:54,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 06:52:54,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094133452] [2021-06-05 06:52:54,915 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 06:52:54,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:52:54,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 06:52:54,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:52:54,915 INFO L87 Difference]: Start difference. First operand 491 states and 1272 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:55,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:52:55,015 INFO L93 Difference]: Finished difference Result 766 states and 2025 transitions. [2021-06-05 06:52:55,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 06:52:55,015 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:52:55,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:52:55,018 INFO L225 Difference]: With dead ends: 766 [2021-06-05 06:52:55,018 INFO L226 Difference]: Without dead ends: 729 [2021-06-05 06:52:55,018 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 122.7ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:52:55,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 729 states. [2021-06-05 06:52:55,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 729 to 509. [2021-06-05 06:52:55,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 508 states have (on average 2.604330708661417) internal successors, (1323), 508 states have internal predecessors, (1323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:55,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 1323 transitions. [2021-06-05 06:52:55,030 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 1323 transitions. Word has length 28 [2021-06-05 06:52:55,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:52:55,030 INFO L482 AbstractCegarLoop]: Abstraction has 509 states and 1323 transitions. [2021-06-05 06:52:55,030 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:55,030 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 1323 transitions. [2021-06-05 06:52:55,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:52:55,031 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:52:55,031 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, 1] [2021-06-05 06:52:55,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 06:52:55,245 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:52:55,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:52:55,245 INFO L82 PathProgramCache]: Analyzing trace with hash 705112774, now seen corresponding path program 10 times [2021-06-05 06:52:55,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:52:55,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043545749] [2021-06-05 06:52:55,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:52:55,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:55,337 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 06:52:55,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:52:55,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043545749] [2021-06-05 06:52:55,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043545749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:55,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411654505] [2021-06-05 06:52:55,338 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 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 06:52:55,365 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:52:55,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:52:55,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 06:52:55,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:52:55,453 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 06:52:55,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411654505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:55,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:52:55,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 06:52:55,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921917435] [2021-06-05 06:52:55,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 06:52:55,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:52:55,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 06:52:55,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:52:55,454 INFO L87 Difference]: Start difference. First operand 509 states and 1323 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:55,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:52:55,617 INFO L93 Difference]: Finished difference Result 860 states and 2316 transitions. [2021-06-05 06:52:55,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 06:52:55,617 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:52:55,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:52:55,621 INFO L225 Difference]: With dead ends: 860 [2021-06-05 06:52:55,621 INFO L226 Difference]: Without dead ends: 823 [2021-06-05 06:52:55,621 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 129.4ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:52:55,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2021-06-05 06:52:55,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 587. [2021-06-05 06:52:55,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 586 states have (on average 2.645051194539249) internal successors, (1550), 586 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:55,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 1550 transitions. [2021-06-05 06:52:55,634 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 1550 transitions. Word has length 28 [2021-06-05 06:52:55,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:52:55,635 INFO L482 AbstractCegarLoop]: Abstraction has 587 states and 1550 transitions. [2021-06-05 06:52:55,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:55,635 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 1550 transitions. [2021-06-05 06:52:55,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:52:55,636 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:52:55,636 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, 1] [2021-06-05 06:52:55,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:52:55,860 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:52:55,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:52:55,860 INFO L82 PathProgramCache]: Analyzing trace with hash 586029762, now seen corresponding path program 11 times [2021-06-05 06:52:55,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:52:55,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315747631] [2021-06-05 06:52:55,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:52:55,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:55,970 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 06:52:55,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:52:55,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315747631] [2021-06-05 06:52:55,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315747631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:55,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163186645] [2021-06-05 06:52:55,970 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 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 06:52:56,019 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:52:56,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:52:56,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 06:52:56,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:52:56,101 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 06:52:56,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163186645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:56,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:52:56,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 06:52:56,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679236636] [2021-06-05 06:52:56,101 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 06:52:56,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:52:56,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 06:52:56,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:52:56,102 INFO L87 Difference]: Start difference. First operand 587 states and 1550 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:56,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:52:56,221 INFO L93 Difference]: Finished difference Result 864 states and 2321 transitions. [2021-06-05 06:52:56,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 06:52:56,221 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:52:56,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:52:56,225 INFO L225 Difference]: With dead ends: 864 [2021-06-05 06:52:56,225 INFO L226 Difference]: Without dead ends: 822 [2021-06-05 06:52:56,226 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 140.6ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:52:56,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 822 states. [2021-06-05 06:52:56,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 822 to 571. [2021-06-05 06:52:56,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 570 states have (on average 2.645614035087719) internal successors, (1508), 570 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:56,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 1508 transitions. [2021-06-05 06:52:56,240 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 1508 transitions. Word has length 28 [2021-06-05 06:52:56,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:52:56,240 INFO L482 AbstractCegarLoop]: Abstraction has 571 states and 1508 transitions. [2021-06-05 06:52:56,241 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:56,241 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 1508 transitions. [2021-06-05 06:52:56,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:52:56,242 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:52:56,242 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, 1] [2021-06-05 06:52:56,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 06:52:56,465 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:52:56,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:52:56,465 INFO L82 PathProgramCache]: Analyzing trace with hash -645966640, now seen corresponding path program 12 times [2021-06-05 06:52:56,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:52:56,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308152860] [2021-06-05 06:52:56,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:52:56,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:56,557 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 06:52:56,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:52:56,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308152860] [2021-06-05 06:52:56,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308152860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:56,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086978781] [2021-06-05 06:52:56,558 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 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 06:52:56,583 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 06:52:56,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:52:56,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 06:52:56,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:52:56,702 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 06:52:56,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086978781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:56,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:52:56,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 06:52:56,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357814970] [2021-06-05 06:52:56,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:52:56,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:52:56,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:52:56,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:52:56,703 INFO L87 Difference]: Start difference. First operand 571 states and 1508 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 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 06:52:56,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:52:56,814 INFO L93 Difference]: Finished difference Result 752 states and 1956 transitions. [2021-06-05 06:52:56,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 06:52:56,814 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 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 28 [2021-06-05 06:52:56,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:52:56,817 INFO L225 Difference]: With dead ends: 752 [2021-06-05 06:52:56,817 INFO L226 Difference]: Without dead ends: 715 [2021-06-05 06:52:56,824 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 134.8ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:52:56,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2021-06-05 06:52:56,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 559. [2021-06-05 06:52:56,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 558 states have (on average 2.6415770609319) internal successors, (1474), 558 states have internal predecessors, (1474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:56,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 1474 transitions. [2021-06-05 06:52:56,837 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 1474 transitions. Word has length 28 [2021-06-05 06:52:56,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:52:56,837 INFO L482 AbstractCegarLoop]: Abstraction has 559 states and 1474 transitions. [2021-06-05 06:52:56,837 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 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 06:52:56,837 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 1474 transitions. [2021-06-05 06:52:56,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:52:56,838 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:52:56,838 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, 1] [2021-06-05 06:52:57,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:52:57,053 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:52:57,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:52:57,053 INFO L82 PathProgramCache]: Analyzing trace with hash 638629600, now seen corresponding path program 13 times [2021-06-05 06:52:57,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:52:57,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700799077] [2021-06-05 06:52:57,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:52:57,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:57,131 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 06:52:57,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:52:57,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700799077] [2021-06-05 06:52:57,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700799077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:57,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559817918] [2021-06-05 06:52:57,131 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 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 06:52:57,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:57,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 06:52:57,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:52:57,244 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 06:52:57,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559817918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:57,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:52:57,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 10 [2021-06-05 06:52:57,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093586456] [2021-06-05 06:52:57,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 06:52:57,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:52:57,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 06:52:57,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:52:57,246 INFO L87 Difference]: Start difference. First operand 559 states and 1474 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:57,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:52:57,345 INFO L93 Difference]: Finished difference Result 718 states and 1889 transitions. [2021-06-05 06:52:57,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 06:52:57,345 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:52:57,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:52:57,348 INFO L225 Difference]: With dead ends: 718 [2021-06-05 06:52:57,348 INFO L226 Difference]: Without dead ends: 681 [2021-06-05 06:52:57,349 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 86.7ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:52:57,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2021-06-05 06:52:57,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 629. [2021-06-05 06:52:57,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 628 states have (on average 2.676751592356688) internal successors, (1681), 628 states have internal predecessors, (1681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:57,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 1681 transitions. [2021-06-05 06:52:57,360 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 1681 transitions. Word has length 28 [2021-06-05 06:52:57,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:52:57,361 INFO L482 AbstractCegarLoop]: Abstraction has 629 states and 1681 transitions. [2021-06-05 06:52:57,361 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:57,361 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 1681 transitions. [2021-06-05 06:52:57,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:52:57,362 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:52:57,362 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, 1] [2021-06-05 06:52:57,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-06-05 06:52:57,577 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:52:57,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:52:57,577 INFO L82 PathProgramCache]: Analyzing trace with hash 519546588, now seen corresponding path program 14 times [2021-06-05 06:52:57,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:52:57,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036581808] [2021-06-05 06:52:57,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:52:57,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:57,660 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:52:57,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:52:57,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036581808] [2021-06-05 06:52:57,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036581808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:57,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950913316] [2021-06-05 06:52:57,661 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 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 06:52:57,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:52:57,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:52:57,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 06:52:57,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:52:57,785 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 06:52:57,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950913316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:57,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:52:57,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 10 [2021-06-05 06:52:57,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109703815] [2021-06-05 06:52:57,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 06:52:57,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:52:57,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 06:52:57,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:52:57,786 INFO L87 Difference]: Start difference. First operand 629 states and 1681 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:57,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:52:57,869 INFO L93 Difference]: Finished difference Result 722 states and 1896 transitions. [2021-06-05 06:52:57,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 06:52:57,870 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:52:57,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:52:57,872 INFO L225 Difference]: With dead ends: 722 [2021-06-05 06:52:57,872 INFO L226 Difference]: Without dead ends: 682 [2021-06-05 06:52:57,873 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 92.3ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:52:57,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2021-06-05 06:52:57,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 573. [2021-06-05 06:52:57,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 572 states have (on average 2.645104895104895) internal successors, (1513), 572 states have internal predecessors, (1513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:57,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 1513 transitions. [2021-06-05 06:52:57,883 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 1513 transitions. Word has length 28 [2021-06-05 06:52:57,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:52:57,884 INFO L482 AbstractCegarLoop]: Abstraction has 573 states and 1513 transitions. [2021-06-05 06:52:57,884 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:57,884 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 1513 transitions. [2021-06-05 06:52:57,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:52:57,885 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:52:57,885 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, 1] [2021-06-05 06:52:58,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-06-05 06:52:58,101 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:52:58,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:52:58,101 INFO L82 PathProgramCache]: Analyzing trace with hash 663834170, now seen corresponding path program 15 times [2021-06-05 06:52:58,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:52:58,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948057124] [2021-06-05 06:52:58,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:52:58,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:58,194 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 06:52:58,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:52:58,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948057124] [2021-06-05 06:52:58,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948057124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:58,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728678827] [2021-06-05 06:52:58,194 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 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 06:52:58,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:52:58,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:52:58,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 06:52:58,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:52:58,357 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 06:52:58,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728678827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:58,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:52:58,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-06-05 06:52:58,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854493927] [2021-06-05 06:52:58,358 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:52:58,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:52:58,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:52:58,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:52:58,358 INFO L87 Difference]: Start difference. First operand 573 states and 1513 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 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 06:52:58,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:52:58,540 INFO L93 Difference]: Finished difference Result 800 states and 2048 transitions. [2021-06-05 06:52:58,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 06:52:58,541 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 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 28 [2021-06-05 06:52:58,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:52:58,543 INFO L225 Difference]: With dead ends: 800 [2021-06-05 06:52:58,544 INFO L226 Difference]: Without dead ends: 762 [2021-06-05 06:52:58,544 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 195.8ms TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:52:58,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2021-06-05 06:52:58,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 543. [2021-06-05 06:52:58,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 543 states, 542 states have (on average 2.6457564575645756) internal successors, (1434), 542 states have internal predecessors, (1434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:58,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 1434 transitions. [2021-06-05 06:52:58,554 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 1434 transitions. Word has length 28 [2021-06-05 06:52:58,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:52:58,554 INFO L482 AbstractCegarLoop]: Abstraction has 543 states and 1434 transitions. [2021-06-05 06:52:58,555 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 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 06:52:58,555 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 1434 transitions. [2021-06-05 06:52:58,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 06:52:58,556 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:52:58,556 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:52:58,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:52:58,756 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:52:58,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:52:58,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1075166198, now seen corresponding path program 16 times [2021-06-05 06:52:58,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:52:58,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038713439] [2021-06-05 06:52:58,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:52:58,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:58,785 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:52:58,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:52:58,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038713439] [2021-06-05 06:52:58,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038713439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:58,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343376290] [2021-06-05 06:52:58,786 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 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 06:52:58,811 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:52:58,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:52:58,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 06:52:58,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:52:58,875 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:52:58,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343376290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:58,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:52:58,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 06:52:58,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104343799] [2021-06-05 06:52:58,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 06:52:58,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:52:58,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 06:52:58,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 06:52:58,877 INFO L87 Difference]: Start difference. First operand 543 states and 1434 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 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 06:52:58,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:52:58,993 INFO L93 Difference]: Finished difference Result 992 states and 2597 transitions. [2021-06-05 06:52:58,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 06:52:58,993 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 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 31 [2021-06-05 06:52:58,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:52:58,997 INFO L225 Difference]: With dead ends: 992 [2021-06-05 06:52:58,997 INFO L226 Difference]: Without dead ends: 992 [2021-06-05 06:52:58,998 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 75.1ms TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:52:59,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 992 states. [2021-06-05 06:52:59,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 992 to 587. [2021-06-05 06:52:59,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 586 states have (on average 2.66382252559727) internal successors, (1561), 586 states have internal predecessors, (1561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:59,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 1561 transitions. [2021-06-05 06:52:59,014 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 1561 transitions. Word has length 31 [2021-06-05 06:52:59,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:52:59,014 INFO L482 AbstractCegarLoop]: Abstraction has 587 states and 1561 transitions. [2021-06-05 06:52:59,014 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 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 06:52:59,014 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 1561 transitions. [2021-06-05 06:52:59,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 06:52:59,015 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:52:59,015 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:52:59,238 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-06-05 06:52:59,238 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:52:59,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:52:59,238 INFO L82 PathProgramCache]: Analyzing trace with hash -1496697428, now seen corresponding path program 17 times [2021-06-05 06:52:59,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:52:59,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800746479] [2021-06-05 06:52:59,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:52:59,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:59,264 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:52:59,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:52:59,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800746479] [2021-06-05 06:52:59,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800746479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:59,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396055078] [2021-06-05 06:52:59,264 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 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 06:52:59,296 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:52:59,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:52:59,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 06:52:59,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:52:59,371 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:52:59,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396055078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:59,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:52:59,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 06:52:59,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047222905] [2021-06-05 06:52:59,373 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 06:52:59,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:52:59,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 06:52:59,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 06:52:59,373 INFO L87 Difference]: Start difference. First operand 587 states and 1561 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 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 06:52:59,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:52:59,452 INFO L93 Difference]: Finished difference Result 1042 states and 2731 transitions. [2021-06-05 06:52:59,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 06:52:59,452 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 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 31 [2021-06-05 06:52:59,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:52:59,467 INFO L225 Difference]: With dead ends: 1042 [2021-06-05 06:52:59,467 INFO L226 Difference]: Without dead ends: 997 [2021-06-05 06:52:59,467 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 68.6ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:52:59,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2021-06-05 06:52:59,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 587. [2021-06-05 06:52:59,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 586 states have (on average 2.651877133105802) internal successors, (1554), 586 states have internal predecessors, (1554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:59,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 1554 transitions. [2021-06-05 06:52:59,490 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 1554 transitions. Word has length 31 [2021-06-05 06:52:59,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:52:59,490 INFO L482 AbstractCegarLoop]: Abstraction has 587 states and 1554 transitions. [2021-06-05 06:52:59,490 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 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 06:52:59,490 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 1554 transitions. [2021-06-05 06:52:59,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 06:52:59,491 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:52:59,492 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:52:59,714 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-05 06:52:59,714 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:52:59,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:52:59,714 INFO L82 PathProgramCache]: Analyzing trace with hash 73958184, now seen corresponding path program 18 times [2021-06-05 06:52:59,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:52:59,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993580023] [2021-06-05 06:52:59,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:52:59,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:59,743 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:52:59,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:52:59,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993580023] [2021-06-05 06:52:59,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993580023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:59,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437923795] [2021-06-05 06:52:59,756 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 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 06:52:59,786 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:52:59,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:52:59,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 06:52:59,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:52:59,864 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:52:59,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437923795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:59,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:52:59,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 06:52:59,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442701662] [2021-06-05 06:52:59,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 06:52:59,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:52:59,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 06:52:59,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 06:52:59,865 INFO L87 Difference]: Start difference. First operand 587 states and 1554 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 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 06:53:00,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:00,128 INFO L93 Difference]: Finished difference Result 2039 states and 5214 transitions. [2021-06-05 06:53:00,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 06:53:00,129 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 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 31 [2021-06-05 06:53:00,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:00,133 INFO L225 Difference]: With dead ends: 2039 [2021-06-05 06:53:00,133 INFO L226 Difference]: Without dead ends: 2039 [2021-06-05 06:53:00,133 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 176.0ms TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:53:00,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2039 states. [2021-06-05 06:53:00,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2039 to 884. [2021-06-05 06:53:00,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 883 states have (on average 2.7633069082672708) internal successors, (2440), 883 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:00,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 2440 transitions. [2021-06-05 06:53:00,157 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 2440 transitions. Word has length 31 [2021-06-05 06:53:00,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:00,157 INFO L482 AbstractCegarLoop]: Abstraction has 884 states and 2440 transitions. [2021-06-05 06:53:00,157 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 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 06:53:00,157 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 2440 transitions. [2021-06-05 06:53:00,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 06:53:00,159 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:00,159 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:00,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:53:00,377 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:00,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:00,377 INFO L82 PathProgramCache]: Analyzing trace with hash -136738862, now seen corresponding path program 19 times [2021-06-05 06:53:00,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:00,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33084817] [2021-06-05 06:53:00,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:00,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:00,402 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:00,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:00,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33084817] [2021-06-05 06:53:00,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33084817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:00,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59270910] [2021-06-05 06:53:00,402 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 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 06:53:00,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:00,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 06:53:00,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:00,506 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:00,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59270910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:00,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:00,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 06:53:00,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884833371] [2021-06-05 06:53:00,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 06:53:00,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:00,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 06:53:00,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 06:53:00,507 INFO L87 Difference]: Start difference. First operand 884 states and 2440 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 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 06:53:00,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:00,723 INFO L93 Difference]: Finished difference Result 1980 states and 5236 transitions. [2021-06-05 06:53:00,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 06:53:00,723 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 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 31 [2021-06-05 06:53:00,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:00,727 INFO L225 Difference]: With dead ends: 1980 [2021-06-05 06:53:00,727 INFO L226 Difference]: Without dead ends: 1968 [2021-06-05 06:53:00,727 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 131.4ms TimeCoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2021-06-05 06:53:00,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1968 states. [2021-06-05 06:53:00,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1968 to 1100. [2021-06-05 06:53:00,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1100 states, 1099 states have (on average 2.808007279344859) internal successors, (3086), 1099 states have internal predecessors, (3086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:00,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1100 states to 1100 states and 3086 transitions. [2021-06-05 06:53:00,754 INFO L78 Accepts]: Start accepts. Automaton has 1100 states and 3086 transitions. Word has length 31 [2021-06-05 06:53:00,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:00,754 INFO L482 AbstractCegarLoop]: Abstraction has 1100 states and 3086 transitions. [2021-06-05 06:53:00,754 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 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 06:53:00,754 INFO L276 IsEmpty]: Start isEmpty. Operand 1100 states and 3086 transitions. [2021-06-05 06:53:00,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 06:53:00,756 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:00,756 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:00,978 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 06:53:00,978 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:00,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:00,978 INFO L82 PathProgramCache]: Analyzing trace with hash 592012956, now seen corresponding path program 20 times [2021-06-05 06:53:00,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:00,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982230400] [2021-06-05 06:53:00,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:00,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:01,011 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:01,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:01,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982230400] [2021-06-05 06:53:01,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982230400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:01,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76098560] [2021-06-05 06:53:01,012 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 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 06:53:01,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:53:01,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:53:01,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 06:53:01,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:01,118 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:01,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76098560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:01,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:01,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 06:53:01,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478054835] [2021-06-05 06:53:01,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 06:53:01,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:01,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 06:53:01,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-05 06:53:01,119 INFO L87 Difference]: Start difference. First operand 1100 states and 3086 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 06:53:01,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:01,399 INFO L93 Difference]: Finished difference Result 2053 states and 5419 transitions. [2021-06-05 06:53:01,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 06:53:01,400 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 31 [2021-06-05 06:53:01,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:01,406 INFO L225 Difference]: With dead ends: 2053 [2021-06-05 06:53:01,406 INFO L226 Difference]: Without dead ends: 2053 [2021-06-05 06:53:01,407 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 181.2ms TimeCoverageRelationStatistics Valid=215, Invalid=385, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:53:01,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2053 states. [2021-06-05 06:53:01,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2053 to 1104. [2021-06-05 06:53:01,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1104 states, 1103 states have (on average 2.8068902991840434) internal successors, (3096), 1103 states have internal predecessors, (3096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:01,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1104 states to 1104 states and 3096 transitions. [2021-06-05 06:53:01,438 INFO L78 Accepts]: Start accepts. Automaton has 1104 states and 3096 transitions. Word has length 31 [2021-06-05 06:53:01,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:01,438 INFO L482 AbstractCegarLoop]: Abstraction has 1104 states and 3096 transitions. [2021-06-05 06:53:01,438 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 06:53:01,438 INFO L276 IsEmpty]: Start isEmpty. Operand 1104 states and 3096 transitions. [2021-06-05 06:53:01,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 06:53:01,440 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:01,440 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:01,662 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:53:01,662 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:01,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:01,663 INFO L82 PathProgramCache]: Analyzing trace with hash 215041802, now seen corresponding path program 21 times [2021-06-05 06:53:01,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:01,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040289219] [2021-06-05 06:53:01,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:01,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:01,701 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:01,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:01,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040289219] [2021-06-05 06:53:01,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040289219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:01,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341173077] [2021-06-05 06:53:01,701 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 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 06:53:01,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 06:53:01,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:53:01,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 06:53:01,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:01,790 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:01,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341173077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:01,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:01,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 06:53:01,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989091506] [2021-06-05 06:53:01,790 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 06:53:01,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:01,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 06:53:01,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-05 06:53:01,791 INFO L87 Difference]: Start difference. First operand 1104 states and 3096 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 06:53:01,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:01,976 INFO L93 Difference]: Finished difference Result 2247 states and 5856 transitions. [2021-06-05 06:53:01,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 06:53:01,977 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 31 [2021-06-05 06:53:01,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:01,980 INFO L225 Difference]: With dead ends: 2247 [2021-06-05 06:53:01,980 INFO L226 Difference]: Without dead ends: 2233 [2021-06-05 06:53:01,980 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 123.2ms TimeCoverageRelationStatistics Valid=139, Invalid=323, Unknown=0, NotChecked=0, Total=462 [2021-06-05 06:53:01,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2233 states. [2021-06-05 06:53:02,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2233 to 1111. [2021-06-05 06:53:02,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1111 states, 1110 states have (on average 2.791891891891892) internal successors, (3099), 1110 states have internal predecessors, (3099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:02,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1111 states to 1111 states and 3099 transitions. [2021-06-05 06:53:02,004 INFO L78 Accepts]: Start accepts. Automaton has 1111 states and 3099 transitions. Word has length 31 [2021-06-05 06:53:02,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:02,004 INFO L482 AbstractCegarLoop]: Abstraction has 1111 states and 3099 transitions. [2021-06-05 06:53:02,004 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 06:53:02,005 INFO L276 IsEmpty]: Start isEmpty. Operand 1111 states and 3099 transitions. [2021-06-05 06:53:02,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 06:53:02,006 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:02,007 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:02,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-05 06:53:02,228 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:02,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:02,228 INFO L82 PathProgramCache]: Analyzing trace with hash 299440576, now seen corresponding path program 22 times [2021-06-05 06:53:02,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:02,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196148028] [2021-06-05 06:53:02,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:02,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:02,258 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:02,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:02,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196148028] [2021-06-05 06:53:02,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196148028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:02,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216893742] [2021-06-05 06:53:02,258 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 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 06:53:02,289 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:53:02,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:53:02,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 06:53:02,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:02,360 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:02,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216893742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:02,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:02,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 06:53:02,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368492580] [2021-06-05 06:53:02,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 06:53:02,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:02,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 06:53:02,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-05 06:53:02,362 INFO L87 Difference]: Start difference. First operand 1111 states and 3099 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 06:53:02,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:02,503 INFO L93 Difference]: Finished difference Result 1836 states and 4940 transitions. [2021-06-05 06:53:02,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 06:53:02,503 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 31 [2021-06-05 06:53:02,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:02,506 INFO L225 Difference]: With dead ends: 1836 [2021-06-05 06:53:02,506 INFO L226 Difference]: Without dead ends: 1808 [2021-06-05 06:53:02,506 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 106.5ms TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:53:02,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1808 states. [2021-06-05 06:53:02,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1808 to 1121. [2021-06-05 06:53:02,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1121 states, 1120 states have (on average 2.775) internal successors, (3108), 1120 states have internal predecessors, (3108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:02,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1121 states to 1121 states and 3108 transitions. [2021-06-05 06:53:02,529 INFO L78 Accepts]: Start accepts. Automaton has 1121 states and 3108 transitions. Word has length 31 [2021-06-05 06:53:02,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:02,529 INFO L482 AbstractCegarLoop]: Abstraction has 1121 states and 3108 transitions. [2021-06-05 06:53:02,529 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 06:53:02,529 INFO L276 IsEmpty]: Start isEmpty. Operand 1121 states and 3108 transitions. [2021-06-05 06:53:02,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 06:53:02,531 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:02,531 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:02,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 06:53:02,745 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:02,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:02,745 INFO L82 PathProgramCache]: Analyzing trace with hash 2072647434, now seen corresponding path program 23 times [2021-06-05 06:53:02,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:02,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196117166] [2021-06-05 06:53:02,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:02,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:02,776 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:02,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:02,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196117166] [2021-06-05 06:53:02,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196117166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:02,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918026745] [2021-06-05 06:53:02,776 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 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 06:53:02,801 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:53:02,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:53:02,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 06:53:02,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:02,866 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:02,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918026745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:02,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:02,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 06:53:02,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434796454] [2021-06-05 06:53:02,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 06:53:02,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:02,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 06:53:02,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:53:02,867 INFO L87 Difference]: Start difference. First operand 1121 states and 3108 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 06:53:03,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:03,108 INFO L93 Difference]: Finished difference Result 2462 states and 6556 transitions. [2021-06-05 06:53:03,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 06:53:03,108 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 31 [2021-06-05 06:53:03,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:03,112 INFO L225 Difference]: With dead ends: 2462 [2021-06-05 06:53:03,113 INFO L226 Difference]: Without dead ends: 2408 [2021-06-05 06:53:03,113 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 158.7ms TimeCoverageRelationStatistics Valid=198, Invalid=402, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:53:03,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2408 states. [2021-06-05 06:53:03,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2408 to 1441. [2021-06-05 06:53:03,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1441 states, 1440 states have (on average 2.8208333333333333) internal successors, (4062), 1440 states have internal predecessors, (4062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:03,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1441 states to 1441 states and 4062 transitions. [2021-06-05 06:53:03,146 INFO L78 Accepts]: Start accepts. Automaton has 1441 states and 4062 transitions. Word has length 31 [2021-06-05 06:53:03,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:03,146 INFO L482 AbstractCegarLoop]: Abstraction has 1441 states and 4062 transitions. [2021-06-05 06:53:03,146 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 06:53:03,146 INFO L276 IsEmpty]: Start isEmpty. Operand 1441 states and 4062 transitions. [2021-06-05 06:53:03,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 06:53:03,149 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:03,149 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:03,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-06-05 06:53:03,365 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:03,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:03,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1805660222, now seen corresponding path program 24 times [2021-06-05 06:53:03,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:03,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570606916] [2021-06-05 06:53:03,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:03,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:03,402 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:03,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:03,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570606916] [2021-06-05 06:53:03,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570606916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:03,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058529322] [2021-06-05 06:53:03,402 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 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 06:53:03,436 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:53:03,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:53:03,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 06:53:03,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:03,505 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:03,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058529322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:03,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:03,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 06:53:03,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380041287] [2021-06-05 06:53:03,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 06:53:03,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:03,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 06:53:03,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 06:53:03,507 INFO L87 Difference]: Start difference. First operand 1441 states and 4062 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 06:53:03,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:03,715 INFO L93 Difference]: Finished difference Result 2786 states and 7510 transitions. [2021-06-05 06:53:03,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 06:53:03,716 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 31 [2021-06-05 06:53:03,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:03,722 INFO L225 Difference]: With dead ends: 2786 [2021-06-05 06:53:03,722 INFO L226 Difference]: Without dead ends: 2786 [2021-06-05 06:53:03,722 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 143.1ms TimeCoverageRelationStatistics Valid=185, Invalid=321, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:53:03,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2786 states. [2021-06-05 06:53:03,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2786 to 1845. [2021-06-05 06:53:03,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1845 states, 1844 states have (on average 2.828633405639913) internal successors, (5216), 1844 states have internal predecessors, (5216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:03,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1845 states to 1845 states and 5216 transitions. [2021-06-05 06:53:03,761 INFO L78 Accepts]: Start accepts. Automaton has 1845 states and 5216 transitions. Word has length 31 [2021-06-05 06:53:03,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:03,762 INFO L482 AbstractCegarLoop]: Abstraction has 1845 states and 5216 transitions. [2021-06-05 06:53:03,762 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 06:53:03,762 INFO L276 IsEmpty]: Start isEmpty. Operand 1845 states and 5216 transitions. [2021-06-05 06:53:03,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 06:53:03,765 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:03,765 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:03,978 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:53:03,978 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:03,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:03,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1164137342, now seen corresponding path program 25 times [2021-06-05 06:53:03,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:03,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516815477] [2021-06-05 06:53:03,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:03,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:04,004 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:04,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:04,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516815477] [2021-06-05 06:53:04,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516815477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:04,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328363975] [2021-06-05 06:53:04,005 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 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 06:53:04,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:04,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 06:53:04,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:04,088 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:04,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328363975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:04,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:04,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 06:53:04,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835796603] [2021-06-05 06:53:04,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 06:53:04,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:04,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 06:53:04,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 06:53:04,090 INFO L87 Difference]: Start difference. First operand 1845 states and 5216 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 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 06:53:04,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:04,198 INFO L93 Difference]: Finished difference Result 2330 states and 6455 transitions. [2021-06-05 06:53:04,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 06:53:04,199 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 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 31 [2021-06-05 06:53:04,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:04,203 INFO L225 Difference]: With dead ends: 2330 [2021-06-05 06:53:04,204 INFO L226 Difference]: Without dead ends: 2330 [2021-06-05 06:53:04,204 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 66.2ms TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:53:04,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2330 states. [2021-06-05 06:53:04,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2330 to 1887. [2021-06-05 06:53:04,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1887 states, 1886 states have (on average 2.829798515376458) internal successors, (5337), 1886 states have internal predecessors, (5337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:04,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1887 states to 1887 states and 5337 transitions. [2021-06-05 06:53:04,256 INFO L78 Accepts]: Start accepts. Automaton has 1887 states and 5337 transitions. Word has length 31 [2021-06-05 06:53:04,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:04,256 INFO L482 AbstractCegarLoop]: Abstraction has 1887 states and 5337 transitions. [2021-06-05 06:53:04,256 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 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 06:53:04,256 INFO L276 IsEmpty]: Start isEmpty. Operand 1887 states and 5337 transitions. [2021-06-05 06:53:04,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 06:53:04,260 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:04,260 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:04,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-06-05 06:53:04,460 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:04,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:04,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1736902034, now seen corresponding path program 26 times [2021-06-05 06:53:04,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:04,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104050346] [2021-06-05 06:53:04,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:04,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:04,484 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:04,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:04,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104050346] [2021-06-05 06:53:04,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104050346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:04,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363350959] [2021-06-05 06:53:04,485 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 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 06:53:04,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:53:04,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:53:04,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 06:53:04,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:04,589 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:04,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363350959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:04,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:04,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 06:53:04,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060075714] [2021-06-05 06:53:04,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 06:53:04,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:04,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 06:53:04,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 06:53:04,592 INFO L87 Difference]: Start difference. First operand 1887 states and 5337 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 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 06:53:04,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:04,661 INFO L93 Difference]: Finished difference Result 2501 states and 6932 transitions. [2021-06-05 06:53:04,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 06:53:04,661 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 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 31 [2021-06-05 06:53:04,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:04,664 INFO L225 Difference]: With dead ends: 2501 [2021-06-05 06:53:04,664 INFO L226 Difference]: Without dead ends: 2465 [2021-06-05 06:53:04,664 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 60.8ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:53:04,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2465 states. [2021-06-05 06:53:04,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2465 to 1887. [2021-06-05 06:53:04,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1887 states, 1886 states have (on average 2.8266171792152703) internal successors, (5331), 1886 states have internal predecessors, (5331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:04,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1887 states to 1887 states and 5331 transitions. [2021-06-05 06:53:04,693 INFO L78 Accepts]: Start accepts. Automaton has 1887 states and 5331 transitions. Word has length 31 [2021-06-05 06:53:04,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:04,693 INFO L482 AbstractCegarLoop]: Abstraction has 1887 states and 5331 transitions. [2021-06-05 06:53:04,693 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 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 06:53:04,693 INFO L276 IsEmpty]: Start isEmpty. Operand 1887 states and 5331 transitions. [2021-06-05 06:53:04,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 06:53:04,696 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:04,696 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:04,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:53:04,913 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:04,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:04,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1310615324, now seen corresponding path program 27 times [2021-06-05 06:53:04,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:04,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997420898] [2021-06-05 06:53:04,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:04,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:04,940 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 06:53:04,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:04,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997420898] [2021-06-05 06:53:04,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997420898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:04,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47686464] [2021-06-05 06:53:04,940 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 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 06:53:04,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:53:04,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:53:04,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 06:53:04,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:05,041 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:05,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47686464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:05,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:05,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 06:53:05,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340330927] [2021-06-05 06:53:05,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 06:53:05,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:05,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 06:53:05,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-05 06:53:05,042 INFO L87 Difference]: Start difference. First operand 1887 states and 5331 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 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 06:53:05,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:05,196 INFO L93 Difference]: Finished difference Result 2490 states and 6843 transitions. [2021-06-05 06:53:05,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 06:53:05,196 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 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 31 [2021-06-05 06:53:05,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:05,199 INFO L225 Difference]: With dead ends: 2490 [2021-06-05 06:53:05,199 INFO L226 Difference]: Without dead ends: 2490 [2021-06-05 06:53:05,199 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 90.7ms TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:53:05,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2490 states. [2021-06-05 06:53:05,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2490 to 2067. [2021-06-05 06:53:05,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2067 states, 2066 states have (on average 2.8330106485963213) internal successors, (5853), 2066 states have internal predecessors, (5853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:05,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2067 states to 2067 states and 5853 transitions. [2021-06-05 06:53:05,226 INFO L78 Accepts]: Start accepts. Automaton has 2067 states and 5853 transitions. Word has length 31 [2021-06-05 06:53:05,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:05,226 INFO L482 AbstractCegarLoop]: Abstraction has 2067 states and 5853 transitions. [2021-06-05 06:53:05,226 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 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 06:53:05,227 INFO L276 IsEmpty]: Start isEmpty. Operand 2067 states and 5853 transitions. [2021-06-05 06:53:05,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 06:53:05,230 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:05,230 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:05,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-06-05 06:53:05,438 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:05,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:05,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1055874042, now seen corresponding path program 28 times [2021-06-05 06:53:05,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:05,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223601463] [2021-06-05 06:53:05,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:05,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:05,462 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:05,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:05,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223601463] [2021-06-05 06:53:05,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223601463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:05,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315218756] [2021-06-05 06:53:05,462 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 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 06:53:05,488 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:53:05,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:53:05,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 06:53:05,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:05,545 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:05,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315218756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:05,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:05,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 06:53:05,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106557584] [2021-06-05 06:53:05,546 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 06:53:05,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:05,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 06:53:05,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-05 06:53:05,546 INFO L87 Difference]: Start difference. First operand 2067 states and 5853 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 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 06:53:05,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:05,680 INFO L93 Difference]: Finished difference Result 2862 states and 7833 transitions. [2021-06-05 06:53:05,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 06:53:05,681 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 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 31 [2021-06-05 06:53:05,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:05,708 INFO L225 Difference]: With dead ends: 2862 [2021-06-05 06:53:05,708 INFO L226 Difference]: Without dead ends: 2838 [2021-06-05 06:53:05,709 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 111.9ms TimeCoverageRelationStatistics Valid=127, Invalid=293, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:53:05,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2838 states. [2021-06-05 06:53:05,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2838 to 2147. [2021-06-05 06:53:05,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2147 states, 2146 states have (on average 2.8355079217148185) internal successors, (6085), 2146 states have internal predecessors, (6085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:05,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2147 states to 2147 states and 6085 transitions. [2021-06-05 06:53:05,736 INFO L78 Accepts]: Start accepts. Automaton has 2147 states and 6085 transitions. Word has length 31 [2021-06-05 06:53:05,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:05,736 INFO L482 AbstractCegarLoop]: Abstraction has 2147 states and 6085 transitions. [2021-06-05 06:53:05,736 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 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 06:53:05,736 INFO L276 IsEmpty]: Start isEmpty. Operand 2147 states and 6085 transitions. [2021-06-05 06:53:05,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 06:53:05,740 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:05,740 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:05,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-06-05 06:53:05,940 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:05,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:05,940 INFO L82 PathProgramCache]: Analyzing trace with hash -276839870, now seen corresponding path program 29 times [2021-06-05 06:53:05,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:05,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802215191] [2021-06-05 06:53:05,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:05,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:05,966 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 06:53:05,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:05,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802215191] [2021-06-05 06:53:05,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802215191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:05,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655070042] [2021-06-05 06:53:05,967 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 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 06:53:05,991 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:53:05,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:53:05,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 06:53:05,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:06,066 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:06,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655070042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:06,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:06,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 06:53:06,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895517561] [2021-06-05 06:53:06,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 06:53:06,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:06,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 06:53:06,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-05 06:53:06,067 INFO L87 Difference]: Start difference. First operand 2147 states and 6085 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 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 06:53:06,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:06,282 INFO L93 Difference]: Finished difference Result 3330 states and 8999 transitions. [2021-06-05 06:53:06,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 06:53:06,282 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 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 31 [2021-06-05 06:53:06,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:06,285 INFO L225 Difference]: With dead ends: 3330 [2021-06-05 06:53:06,285 INFO L226 Difference]: Without dead ends: 3330 [2021-06-05 06:53:06,285 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 148.5ms TimeCoverageRelationStatistics Valid=215, Invalid=385, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:53:06,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3330 states. [2021-06-05 06:53:06,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3330 to 2317. [2021-06-05 06:53:06,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2317 states, 2316 states have (on average 2.8626943005181347) internal successors, (6630), 2316 states have internal predecessors, (6630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:06,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2317 states to 2317 states and 6630 transitions. [2021-06-05 06:53:06,325 INFO L78 Accepts]: Start accepts. Automaton has 2317 states and 6630 transitions. Word has length 31 [2021-06-05 06:53:06,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:06,325 INFO L482 AbstractCegarLoop]: Abstraction has 2317 states and 6630 transitions. [2021-06-05 06:53:06,325 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 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 06:53:06,325 INFO L276 IsEmpty]: Start isEmpty. Operand 2317 states and 6630 transitions. [2021-06-05 06:53:06,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 06:53:06,329 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:06,329 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:06,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-05 06:53:06,545 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:06,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:06,545 INFO L82 PathProgramCache]: Analyzing trace with hash -487536916, now seen corresponding path program 30 times [2021-06-05 06:53:06,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:06,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318978089] [2021-06-05 06:53:06,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:06,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:06,572 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:06,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:06,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318978089] [2021-06-05 06:53:06,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318978089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:06,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897988554] [2021-06-05 06:53:06,572 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 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 06:53:06,617 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 06:53:06,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:53:06,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 06:53:06,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:06,686 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:06,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897988554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:06,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:06,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 06:53:06,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496582013] [2021-06-05 06:53:06,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 06:53:06,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:06,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 06:53:06,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-05 06:53:06,689 INFO L87 Difference]: Start difference. First operand 2317 states and 6630 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 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 06:53:06,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:06,909 INFO L93 Difference]: Finished difference Result 3536 states and 9738 transitions. [2021-06-05 06:53:06,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 06:53:06,910 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 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 31 [2021-06-05 06:53:06,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:06,914 INFO L225 Difference]: With dead ends: 3536 [2021-06-05 06:53:06,915 INFO L226 Difference]: Without dead ends: 3524 [2021-06-05 06:53:06,916 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 137.9ms TimeCoverageRelationStatistics Valid=139, Invalid=323, Unknown=0, NotChecked=0, Total=462 [2021-06-05 06:53:06,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3524 states. [2021-06-05 06:53:06,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3524 to 2553. [2021-06-05 06:53:07,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2553 states, 2552 states have (on average 2.865203761755486) internal successors, (7312), 2552 states have internal predecessors, (7312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:07,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2553 states to 2553 states and 7312 transitions. [2021-06-05 06:53:07,007 INFO L78 Accepts]: Start accepts. Automaton has 2553 states and 7312 transitions. Word has length 31 [2021-06-05 06:53:07,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:07,007 INFO L482 AbstractCegarLoop]: Abstraction has 2553 states and 7312 transitions. [2021-06-05 06:53:07,007 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 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 06:53:07,007 INFO L276 IsEmpty]: Start isEmpty. Operand 2553 states and 7312 transitions. [2021-06-05 06:53:07,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 06:53:07,011 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:07,012 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:07,234 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-05 06:53:07,235 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:07,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:07,235 INFO L82 PathProgramCache]: Analyzing trace with hash 241214902, now seen corresponding path program 31 times [2021-06-05 06:53:07,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:07,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293022483] [2021-06-05 06:53:07,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:07,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:07,258 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:07,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:07,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293022483] [2021-06-05 06:53:07,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293022483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:07,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874022732] [2021-06-05 06:53:07,259 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 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 06:53:07,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:07,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 06:53:07,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:07,349 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:07,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874022732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:07,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:07,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 06:53:07,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347960667] [2021-06-05 06:53:07,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 06:53:07,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:07,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 06:53:07,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 06:53:07,351 INFO L87 Difference]: Start difference. First operand 2553 states and 7312 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 06:53:07,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:07,585 INFO L93 Difference]: Finished difference Result 3564 states and 9736 transitions. [2021-06-05 06:53:07,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 06:53:07,585 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 31 [2021-06-05 06:53:07,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:07,589 INFO L225 Difference]: With dead ends: 3564 [2021-06-05 06:53:07,589 INFO L226 Difference]: Without dead ends: 3564 [2021-06-05 06:53:07,589 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 159.3ms TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:53:07,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3564 states. [2021-06-05 06:53:07,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3564 to 2557. [2021-06-05 06:53:07,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2557 states, 2556 states have (on average 2.856025039123631) internal successors, (7300), 2556 states have internal predecessors, (7300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:07,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2557 states to 2557 states and 7300 transitions. [2021-06-05 06:53:07,636 INFO L78 Accepts]: Start accepts. Automaton has 2557 states and 7300 transitions. Word has length 31 [2021-06-05 06:53:07,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:07,636 INFO L482 AbstractCegarLoop]: Abstraction has 2557 states and 7300 transitions. [2021-06-05 06:53:07,636 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 06:53:07,636 INFO L276 IsEmpty]: Start isEmpty. Operand 2557 states and 7300 transitions. [2021-06-05 06:53:07,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 06:53:07,641 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:07,641 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:07,862 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-05 06:53:07,862 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:07,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:07,863 INFO L82 PathProgramCache]: Analyzing trace with hash -135756252, now seen corresponding path program 32 times [2021-06-05 06:53:07,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:07,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738431520] [2021-06-05 06:53:07,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:07,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:07,887 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:07,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:07,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738431520] [2021-06-05 06:53:07,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738431520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:07,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100791024] [2021-06-05 06:53:07,888 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 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 06:53:07,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:53:07,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:53:07,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 06:53:07,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:07,985 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:07,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100791024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:07,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:07,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 06:53:07,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025425545] [2021-06-05 06:53:07,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 06:53:07,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:07,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 06:53:07,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 06:53:07,986 INFO L87 Difference]: Start difference. First operand 2557 states and 7300 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 06:53:08,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:08,156 INFO L93 Difference]: Finished difference Result 3120 states and 8617 transitions. [2021-06-05 06:53:08,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 06:53:08,157 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 31 [2021-06-05 06:53:08,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:08,160 INFO L225 Difference]: With dead ends: 3120 [2021-06-05 06:53:08,160 INFO L226 Difference]: Without dead ends: 3106 [2021-06-05 06:53:08,160 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 107.5ms TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:53:08,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3106 states. [2021-06-05 06:53:08,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3106 to 2571. [2021-06-05 06:53:08,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2571 states, 2570 states have (on average 2.849805447470817) internal successors, (7324), 2570 states have internal predecessors, (7324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:08,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2571 states to 2571 states and 7324 transitions. [2021-06-05 06:53:08,192 INFO L78 Accepts]: Start accepts. Automaton has 2571 states and 7324 transitions. Word has length 31 [2021-06-05 06:53:08,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:08,193 INFO L482 AbstractCegarLoop]: Abstraction has 2571 states and 7324 transitions. [2021-06-05 06:53:08,193 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 06:53:08,193 INFO L276 IsEmpty]: Start isEmpty. Operand 2571 states and 7324 transitions. [2021-06-05 06:53:08,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 06:53:08,197 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:08,197 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:08,411 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-05 06:53:08,411 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:08,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:08,412 INFO L82 PathProgramCache]: Analyzing trace with hash -2133092770, now seen corresponding path program 33 times [2021-06-05 06:53:08,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:08,412 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053631100] [2021-06-05 06:53:08,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:08,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:08,443 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 06:53:08,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:08,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053631100] [2021-06-05 06:53:08,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053631100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:08,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373913381] [2021-06-05 06:53:08,443 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 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 06:53:08,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:53:08,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:53:08,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 06:53:08,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:08,557 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:08,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373913381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:08,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:08,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 06:53:08,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064784483] [2021-06-05 06:53:08,557 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 06:53:08,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:08,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 06:53:08,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:53:08,558 INFO L87 Difference]: Start difference. First operand 2571 states and 7324 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:08,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:08,810 INFO L93 Difference]: Finished difference Result 3644 states and 10056 transitions. [2021-06-05 06:53:08,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 06:53:08,811 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 06:53:08,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:08,816 INFO L225 Difference]: With dead ends: 3644 [2021-06-05 06:53:08,816 INFO L226 Difference]: Without dead ends: 3644 [2021-06-05 06:53:08,816 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 160.2ms TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:53:08,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3644 states. [2021-06-05 06:53:08,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3644 to 2693. [2021-06-05 06:53:08,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2693 states, 2692 states have (on average 2.846582466567608) internal successors, (7663), 2692 states have internal predecessors, (7663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:08,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2693 states to 2693 states and 7663 transitions. [2021-06-05 06:53:08,863 INFO L78 Accepts]: Start accepts. Automaton has 2693 states and 7663 transitions. Word has length 31 [2021-06-05 06:53:08,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:08,863 INFO L482 AbstractCegarLoop]: Abstraction has 2693 states and 7663 transitions. [2021-06-05 06:53:08,863 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:08,864 INFO L276 IsEmpty]: Start isEmpty. Operand 2693 states and 7663 transitions. [2021-06-05 06:53:08,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 06:53:08,869 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:08,869 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:09,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-06-05 06:53:09,089 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:09,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:09,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1233797400, now seen corresponding path program 34 times [2021-06-05 06:53:09,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:09,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87308240] [2021-06-05 06:53:09,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:09,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:09,114 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 06:53:09,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:09,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87308240] [2021-06-05 06:53:09,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87308240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:09,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116621980] [2021-06-05 06:53:09,115 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 06:53:09,140 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:53:09,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:53:09,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 06:53:09,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:09,201 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:09,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116621980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:09,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:09,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 06:53:09,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897941860] [2021-06-05 06:53:09,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 06:53:09,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:09,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 06:53:09,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 06:53:09,202 INFO L87 Difference]: Start difference. First operand 2693 states and 7663 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:09,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:09,401 INFO L93 Difference]: Finished difference Result 4193 states and 11519 transitions. [2021-06-05 06:53:09,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 06:53:09,401 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 06:53:09,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:09,406 INFO L225 Difference]: With dead ends: 4193 [2021-06-05 06:53:09,406 INFO L226 Difference]: Without dead ends: 4193 [2021-06-05 06:53:09,406 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 137.9ms TimeCoverageRelationStatistics Valid=185, Invalid=321, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:53:09,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4193 states. [2021-06-05 06:53:09,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4193 to 3161. [2021-06-05 06:53:09,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3161 states, 3160 states have (on average 2.854113924050633) internal successors, (9019), 3160 states have internal predecessors, (9019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:09,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3161 states to 3161 states and 9019 transitions. [2021-06-05 06:53:09,452 INFO L78 Accepts]: Start accepts. Automaton has 3161 states and 9019 transitions. Word has length 31 [2021-06-05 06:53:09,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:09,453 INFO L482 AbstractCegarLoop]: Abstraction has 3161 states and 9019 transitions. [2021-06-05 06:53:09,453 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:09,453 INFO L276 IsEmpty]: Start isEmpty. Operand 3161 states and 9019 transitions. [2021-06-05 06:53:09,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 06:53:09,459 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:09,459 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:09,681 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:53:09,681 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:09,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:09,681 INFO L82 PathProgramCache]: Analyzing trace with hash -1092713782, now seen corresponding path program 35 times [2021-06-05 06:53:09,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:09,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231028622] [2021-06-05 06:53:09,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:09,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:09,702 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:53:09,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:09,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231028622] [2021-06-05 06:53:09,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231028622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:09,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100830270] [2021-06-05 06:53:09,702 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 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 06:53:09,747 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:53:09,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:53:09,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 06:53:09,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:09,820 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:09,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100830270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:09,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:09,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 06:53:09,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162285992] [2021-06-05 06:53:09,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 06:53:09,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:09,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 06:53:09,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 06:53:09,821 INFO L87 Difference]: Start difference. First operand 3161 states and 9019 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 06:53:10,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:10,032 INFO L93 Difference]: Finished difference Result 4026 states and 11093 transitions. [2021-06-05 06:53:10,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 06:53:10,032 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 31 [2021-06-05 06:53:10,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:10,038 INFO L225 Difference]: With dead ends: 4026 [2021-06-05 06:53:10,038 INFO L226 Difference]: Without dead ends: 4012 [2021-06-05 06:53:10,038 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 140.4ms TimeCoverageRelationStatistics Valid=165, Invalid=297, Unknown=0, NotChecked=0, Total=462 [2021-06-05 06:53:10,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4012 states. [2021-06-05 06:53:10,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4012 to 3057. [2021-06-05 06:53:10,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3057 states, 3056 states have (on average 2.8406413612565444) internal successors, (8681), 3056 states have internal predecessors, (8681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:10,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3057 states to 3057 states and 8681 transitions. [2021-06-05 06:53:10,121 INFO L78 Accepts]: Start accepts. Automaton has 3057 states and 8681 transitions. Word has length 31 [2021-06-05 06:53:10,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:10,121 INFO L482 AbstractCegarLoop]: Abstraction has 3057 states and 8681 transitions. [2021-06-05 06:53:10,121 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 06:53:10,121 INFO L276 IsEmpty]: Start isEmpty. Operand 3057 states and 8681 transitions. [2021-06-05 06:53:10,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 06:53:10,126 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:10,126 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:10,331 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:53:10,331 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:10,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:10,331 INFO L82 PathProgramCache]: Analyzing trace with hash -1008315008, now seen corresponding path program 36 times [2021-06-05 06:53:10,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:10,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098769305] [2021-06-05 06:53:10,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:10,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:10,358 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:10,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:10,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098769305] [2021-06-05 06:53:10,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098769305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:10,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645577728] [2021-06-05 06:53:10,359 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 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 06:53:10,384 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:53:10,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:53:10,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 06:53:10,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:10,444 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:10,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645577728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:10,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:10,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 06:53:10,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674935437] [2021-06-05 06:53:10,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 06:53:10,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:10,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 06:53:10,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:53:10,445 INFO L87 Difference]: Start difference. First operand 3057 states and 8681 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 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 06:53:10,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:10,678 INFO L93 Difference]: Finished difference Result 4063 states and 11292 transitions. [2021-06-05 06:53:10,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 06:53:10,679 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 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 31 [2021-06-05 06:53:10,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:10,685 INFO L225 Difference]: With dead ends: 4063 [2021-06-05 06:53:10,685 INFO L226 Difference]: Without dead ends: 4007 [2021-06-05 06:53:10,686 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 152.8ms TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:53:10,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4007 states. [2021-06-05 06:53:10,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4007 to 3327. [2021-06-05 06:53:10,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3327 states, 3326 states have (on average 2.850871918220084) internal successors, (9482), 3326 states have internal predecessors, (9482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:10,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3327 states to 3327 states and 9482 transitions. [2021-06-05 06:53:10,746 INFO L78 Accepts]: Start accepts. Automaton has 3327 states and 9482 transitions. Word has length 31 [2021-06-05 06:53:10,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:10,747 INFO L482 AbstractCegarLoop]: Abstraction has 3327 states and 9482 transitions. [2021-06-05 06:53:10,747 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 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 06:53:10,747 INFO L276 IsEmpty]: Start isEmpty. Operand 3327 states and 9482 transitions. [2021-06-05 06:53:10,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 06:53:10,752 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:10,752 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:10,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:53:10,969 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:10,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:10,969 INFO L82 PathProgramCache]: Analyzing trace with hash 225377440, now seen corresponding path program 37 times [2021-06-05 06:53:10,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:10,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632872433] [2021-06-05 06:53:10,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:10,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:11,124 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:11,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:11,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632872433] [2021-06-05 06:53:11,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632872433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:11,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742153083] [2021-06-05 06:53:11,125 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 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 06:53:11,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:11,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 06:53:11,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:11,408 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:11,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742153083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:11,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:11,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-05 06:53:11,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310738321] [2021-06-05 06:53:11,408 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:53:11,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:11,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:53:11,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:53:11,409 INFO L87 Difference]: Start difference. First operand 3327 states and 9482 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 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 06:53:11,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:11,542 INFO L93 Difference]: Finished difference Result 5088 states and 14550 transitions. [2021-06-05 06:53:11,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 06:53:11,542 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 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 34 [2021-06-05 06:53:11,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:11,548 INFO L225 Difference]: With dead ends: 5088 [2021-06-05 06:53:11,549 INFO L226 Difference]: Without dead ends: 5050 [2021-06-05 06:53:11,549 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 179.5ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:53:11,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5050 states. [2021-06-05 06:53:11,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5050 to 3355. [2021-06-05 06:53:11,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3355 states, 3354 states have (on average 2.8449612403100777) internal successors, (9542), 3354 states have internal predecessors, (9542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:11,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3355 states to 3355 states and 9542 transitions. [2021-06-05 06:53:11,620 INFO L78 Accepts]: Start accepts. Automaton has 3355 states and 9542 transitions. Word has length 34 [2021-06-05 06:53:11,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:11,620 INFO L482 AbstractCegarLoop]: Abstraction has 3355 states and 9542 transitions. [2021-06-05 06:53:11,620 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 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 06:53:11,620 INFO L276 IsEmpty]: Start isEmpty. Operand 3355 states and 9542 transitions. [2021-06-05 06:53:11,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 06:53:11,626 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:11,626 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:11,843 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-06-05 06:53:11,844 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:11,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:11,844 INFO L82 PathProgramCache]: Analyzing trace with hash -236314294, now seen corresponding path program 38 times [2021-06-05 06:53:11,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:11,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715005724] [2021-06-05 06:53:11,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:11,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:11,963 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:11,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:11,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715005724] [2021-06-05 06:53:11,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715005724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:11,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265637268] [2021-06-05 06:53:11,964 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 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 06:53:12,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:53:12,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:53:12,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 06:53:12,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:12,148 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:12,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265637268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:12,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:12,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 06:53:12,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798996905] [2021-06-05 06:53:12,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:53:12,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:12,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:53:12,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:53:12,149 INFO L87 Difference]: Start difference. First operand 3355 states and 9542 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 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 06:53:12,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:12,437 INFO L93 Difference]: Finished difference Result 6932 states and 19936 transitions. [2021-06-05 06:53:12,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 06:53:12,437 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 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 34 [2021-06-05 06:53:12,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:12,448 INFO L225 Difference]: With dead ends: 6932 [2021-06-05 06:53:12,448 INFO L226 Difference]: Without dead ends: 6850 [2021-06-05 06:53:12,449 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 232.2ms TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:53:12,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6850 states. [2021-06-05 06:53:12,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6850 to 4710. [2021-06-05 06:53:12,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4710 states, 4709 states have (on average 2.8789551921851775) internal successors, (13557), 4709 states have internal predecessors, (13557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:12,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4710 states to 4710 states and 13557 transitions. [2021-06-05 06:53:12,538 INFO L78 Accepts]: Start accepts. Automaton has 4710 states and 13557 transitions. Word has length 34 [2021-06-05 06:53:12,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:12,538 INFO L482 AbstractCegarLoop]: Abstraction has 4710 states and 13557 transitions. [2021-06-05 06:53:12,538 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 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 06:53:12,538 INFO L276 IsEmpty]: Start isEmpty. Operand 4710 states and 13557 transitions. [2021-06-05 06:53:12,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 06:53:12,547 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:12,547 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:12,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:53:12,769 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:12,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:12,769 INFO L82 PathProgramCache]: Analyzing trace with hash 359791622, now seen corresponding path program 39 times [2021-06-05 06:53:12,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:12,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633938675] [2021-06-05 06:53:12,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:12,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:12,910 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:12,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:12,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633938675] [2021-06-05 06:53:12,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633938675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:12,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670567794] [2021-06-05 06:53:12,911 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 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 06:53:12,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:53:12,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:53:12,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 06:53:12,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:13,110 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:13,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670567794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:13,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:13,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 06:53:13,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261700799] [2021-06-05 06:53:13,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:53:13,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:13,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:53:13,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:53:13,111 INFO L87 Difference]: Start difference. First operand 4710 states and 13557 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 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 06:53:13,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:13,397 INFO L93 Difference]: Finished difference Result 6936 states and 19938 transitions. [2021-06-05 06:53:13,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 06:53:13,397 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 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 34 [2021-06-05 06:53:13,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:13,405 INFO L225 Difference]: With dead ends: 6936 [2021-06-05 06:53:13,405 INFO L226 Difference]: Without dead ends: 6824 [2021-06-05 06:53:13,405 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 272.1ms TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:53:13,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6824 states. [2021-06-05 06:53:13,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6824 to 4404. [2021-06-05 06:53:13,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4404 states, 4403 states have (on average 2.865319100613218) internal successors, (12616), 4403 states have internal predecessors, (12616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:13,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4404 states to 4404 states and 12616 transitions. [2021-06-05 06:53:13,483 INFO L78 Accepts]: Start accepts. Automaton has 4404 states and 12616 transitions. Word has length 34 [2021-06-05 06:53:13,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:13,483 INFO L482 AbstractCegarLoop]: Abstraction has 4404 states and 12616 transitions. [2021-06-05 06:53:13,483 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 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 06:53:13,483 INFO L276 IsEmpty]: Start isEmpty. Operand 4404 states and 12616 transitions. [2021-06-05 06:53:13,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 06:53:13,489 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:13,489 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:13,689 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-06-05 06:53:13,690 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:13,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:13,690 INFO L82 PathProgramCache]: Analyzing trace with hash -697731906, now seen corresponding path program 40 times [2021-06-05 06:53:13,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:13,690 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466009700] [2021-06-05 06:53:13,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:13,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:13,796 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:13,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:13,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466009700] [2021-06-05 06:53:13,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466009700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:13,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353548599] [2021-06-05 06:53:13,796 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 06:53:13,821 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:53:13,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:53:13,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 06:53:13,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:13,994 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:13,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353548599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:13,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:13,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 06:53:13,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137732130] [2021-06-05 06:53:13,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:53:13,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:13,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:53:13,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:53:13,996 INFO L87 Difference]: Start difference. First operand 4404 states and 12616 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 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 06:53:14,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:14,226 INFO L93 Difference]: Finished difference Result 6717 states and 19331 transitions. [2021-06-05 06:53:14,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 06:53:14,227 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 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 34 [2021-06-05 06:53:14,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:14,235 INFO L225 Difference]: With dead ends: 6717 [2021-06-05 06:53:14,236 INFO L226 Difference]: Without dead ends: 6641 [2021-06-05 06:53:14,236 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 205.6ms TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:53:14,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6641 states. [2021-06-05 06:53:14,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6641 to 4682. [2021-06-05 06:53:14,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4682 states, 4681 states have (on average 2.87267677846614) internal successors, (13447), 4681 states have internal predecessors, (13447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:14,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4682 states to 4682 states and 13447 transitions. [2021-06-05 06:53:14,322 INFO L78 Accepts]: Start accepts. Automaton has 4682 states and 13447 transitions. Word has length 34 [2021-06-05 06:53:14,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:14,322 INFO L482 AbstractCegarLoop]: Abstraction has 4682 states and 13447 transitions. [2021-06-05 06:53:14,322 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 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 06:53:14,322 INFO L276 IsEmpty]: Start isEmpty. Operand 4682 states and 13447 transitions. [2021-06-05 06:53:14,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 06:53:14,327 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:14,327 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:14,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-06-05 06:53:14,528 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:14,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:14,528 INFO L82 PathProgramCache]: Analyzing trace with hash 480842916, now seen corresponding path program 41 times [2021-06-05 06:53:14,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:14,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612903792] [2021-06-05 06:53:14,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:14,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:14,661 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:14,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:14,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612903792] [2021-06-05 06:53:14,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612903792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:14,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079663290] [2021-06-05 06:53:14,662 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 06:53:14,694 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:53:14,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:53:14,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 06:53:14,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:14,889 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:14,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079663290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:14,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:14,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 06:53:14,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452968611] [2021-06-05 06:53:14,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:53:14,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:14,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:53:14,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:53:14,891 INFO L87 Difference]: Start difference. First operand 4682 states and 13447 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 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 06:53:15,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:15,072 INFO L93 Difference]: Finished difference Result 6651 states and 19193 transitions. [2021-06-05 06:53:15,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 06:53:15,072 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 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 34 [2021-06-05 06:53:15,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:15,080 INFO L225 Difference]: With dead ends: 6651 [2021-06-05 06:53:15,080 INFO L226 Difference]: Without dead ends: 6613 [2021-06-05 06:53:15,080 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 240.2ms TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:53:15,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6613 states. [2021-06-05 06:53:15,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6613 to 4704. [2021-06-05 06:53:15,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4704 states, 4703 states have (on average 2.8730597490963214) internal successors, (13512), 4703 states have internal predecessors, (13512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:15,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4704 states to 4704 states and 13512 transitions. [2021-06-05 06:53:15,162 INFO L78 Accepts]: Start accepts. Automaton has 4704 states and 13512 transitions. Word has length 34 [2021-06-05 06:53:15,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:15,162 INFO L482 AbstractCegarLoop]: Abstraction has 4704 states and 13512 transitions. [2021-06-05 06:53:15,162 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 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 06:53:15,162 INFO L276 IsEmpty]: Start isEmpty. Operand 4704 states and 13512 transitions. [2021-06-05 06:53:15,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 06:53:15,167 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:15,167 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:15,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:53:15,368 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:15,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:15,368 INFO L82 PathProgramCache]: Analyzing trace with hash 1249457240, now seen corresponding path program 42 times [2021-06-05 06:53:15,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:15,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341929067] [2021-06-05 06:53:15,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:15,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:15,482 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:15,482 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:15,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341929067] [2021-06-05 06:53:15,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341929067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:15,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559027347] [2021-06-05 06:53:15,483 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 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 06:53:15,514 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 06:53:15,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:53:15,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:53:15,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:15,682 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:15,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559027347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:15,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:15,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 06:53:15,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060229810] [2021-06-05 06:53:15,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 06:53:15,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:15,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 06:53:15,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:53:15,684 INFO L87 Difference]: Start difference. First operand 4704 states and 13512 transitions. Second operand has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:16,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:16,074 INFO L93 Difference]: Finished difference Result 7194 states and 20574 transitions. [2021-06-05 06:53:16,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 06:53:16,075 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 06:53:16,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:16,085 INFO L225 Difference]: With dead ends: 7194 [2021-06-05 06:53:16,085 INFO L226 Difference]: Without dead ends: 7092 [2021-06-05 06:53:16,086 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 379.6ms TimeCoverageRelationStatistics Valid=113, Invalid=817, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:53:16,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7092 states. [2021-06-05 06:53:16,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7092 to 6468. [2021-06-05 06:53:16,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6468 states, 6467 states have (on average 2.9008813978660895) internal successors, (18760), 6467 states have internal predecessors, (18760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:16,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6468 states to 6468 states and 18760 transitions. [2021-06-05 06:53:16,214 INFO L78 Accepts]: Start accepts. Automaton has 6468 states and 18760 transitions. Word has length 34 [2021-06-05 06:53:16,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:16,215 INFO L482 AbstractCegarLoop]: Abstraction has 6468 states and 18760 transitions. [2021-06-05 06:53:16,215 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:16,215 INFO L276 IsEmpty]: Start isEmpty. Operand 6468 states and 18760 transitions. [2021-06-05 06:53:16,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 06:53:16,225 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:16,225 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:16,429 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-06-05 06:53:16,429 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:16,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:16,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1769005992, now seen corresponding path program 43 times [2021-06-05 06:53:16,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:16,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348287932] [2021-06-05 06:53:16,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:16,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:16,531 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:16,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:16,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348287932] [2021-06-05 06:53:16,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348287932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:16,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881506831] [2021-06-05 06:53:16,532 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 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 06:53:16,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:16,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 06:53:16,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:16,736 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:16,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881506831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:16,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:16,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-06-05 06:53:16,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926719833] [2021-06-05 06:53:16,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:53:16,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:16,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:53:16,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:53:16,737 INFO L87 Difference]: Start difference. First operand 6468 states and 18760 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 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 06:53:17,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:17,001 INFO L93 Difference]: Finished difference Result 7452 states and 21366 transitions. [2021-06-05 06:53:17,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 06:53:17,001 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 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 34 [2021-06-05 06:53:17,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:17,010 INFO L225 Difference]: With dead ends: 7452 [2021-06-05 06:53:17,010 INFO L226 Difference]: Without dead ends: 7330 [2021-06-05 06:53:17,010 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 228.4ms TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:53:17,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7330 states. [2021-06-05 06:53:17,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7330 to 5896. [2021-06-05 06:53:17,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5896 states, 5895 states have (on average 2.891263782866836) internal successors, (17044), 5895 states have internal predecessors, (17044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:17,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5896 states to 5896 states and 17044 transitions. [2021-06-05 06:53:17,083 INFO L78 Accepts]: Start accepts. Automaton has 5896 states and 17044 transitions. Word has length 34 [2021-06-05 06:53:17,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:17,084 INFO L482 AbstractCegarLoop]: Abstraction has 5896 states and 17044 transitions. [2021-06-05 06:53:17,084 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 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 06:53:17,084 INFO L276 IsEmpty]: Start isEmpty. Operand 5896 states and 17044 transitions. [2021-06-05 06:53:17,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 06:53:17,090 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:17,090 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:17,290 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:53:17,290 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:17,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:17,290 INFO L82 PathProgramCache]: Analyzing trace with hash -218400736, now seen corresponding path program 44 times [2021-06-05 06:53:17,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:17,291 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35415942] [2021-06-05 06:53:17,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:17,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:17,383 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:17,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:17,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35415942] [2021-06-05 06:53:17,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35415942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:17,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567537515] [2021-06-05 06:53:17,384 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 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 06:53:17,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:53:17,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:53:17,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 06:53:17,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:17,583 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:17,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567537515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:17,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:17,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-06-05 06:53:17,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001361406] [2021-06-05 06:53:17,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:53:17,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:17,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:53:17,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:53:17,584 INFO L87 Difference]: Start difference. First operand 5896 states and 17044 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 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 06:53:17,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:17,816 INFO L93 Difference]: Finished difference Result 6556 states and 18704 transitions. [2021-06-05 06:53:17,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 06:53:17,817 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 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 34 [2021-06-05 06:53:17,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:17,826 INFO L225 Difference]: With dead ends: 6556 [2021-06-05 06:53:17,827 INFO L226 Difference]: Without dead ends: 6480 [2021-06-05 06:53:17,827 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 215.4ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:53:17,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6480 states. [2021-06-05 06:53:17,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6480 to 5562. [2021-06-05 06:53:17,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5562 states, 5561 states have (on average 2.88563208056105) internal successors, (16047), 5561 states have internal predecessors, (16047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:17,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5562 states to 5562 states and 16047 transitions. [2021-06-05 06:53:17,908 INFO L78 Accepts]: Start accepts. Automaton has 5562 states and 16047 transitions. Word has length 34 [2021-06-05 06:53:17,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:17,908 INFO L482 AbstractCegarLoop]: Abstraction has 5562 states and 16047 transitions. [2021-06-05 06:53:17,908 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 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 06:53:17,908 INFO L276 IsEmpty]: Start isEmpty. Operand 5562 states and 16047 transitions. [2021-06-05 06:53:17,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 06:53:17,914 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:17,914 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:18,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-06-05 06:53:18,121 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:18,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:18,121 INFO L82 PathProgramCache]: Analyzing trace with hash -862511400, now seen corresponding path program 45 times [2021-06-05 06:53:18,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:18,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698897564] [2021-06-05 06:53:18,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:18,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:18,248 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:18,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:18,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698897564] [2021-06-05 06:53:18,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698897564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:18,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344074667] [2021-06-05 06:53:18,248 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 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 06:53:18,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:53:18,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:53:18,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 06:53:18,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:18,458 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:18,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344074667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:18,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:18,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 06:53:18,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801413548] [2021-06-05 06:53:18,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:53:18,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:18,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:53:18,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:53:18,459 INFO L87 Difference]: Start difference. First operand 5562 states and 16047 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 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 06:53:18,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:18,631 INFO L93 Difference]: Finished difference Result 6381 states and 18213 transitions. [2021-06-05 06:53:18,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 06:53:18,632 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 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 34 [2021-06-05 06:53:18,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:18,640 INFO L225 Difference]: With dead ends: 6381 [2021-06-05 06:53:18,640 INFO L226 Difference]: Without dead ends: 6305 [2021-06-05 06:53:18,641 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 231.2ms TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:53:18,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6305 states. [2021-06-05 06:53:18,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6305 to 5827. [2021-06-05 06:53:18,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5827 states, 5826 states have (on average 2.8884311706144867) internal successors, (16828), 5826 states have internal predecessors, (16828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:18,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5827 states to 5827 states and 16828 transitions. [2021-06-05 06:53:18,706 INFO L78 Accepts]: Start accepts. Automaton has 5827 states and 16828 transitions. Word has length 34 [2021-06-05 06:53:18,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:18,706 INFO L482 AbstractCegarLoop]: Abstraction has 5827 states and 16828 transitions. [2021-06-05 06:53:18,706 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 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 06:53:18,706 INFO L276 IsEmpty]: Start isEmpty. Operand 5827 states and 16828 transitions. [2021-06-05 06:53:18,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 06:53:18,712 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:18,712 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:18,913 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:53:18,913 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:18,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:18,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1403446700, now seen corresponding path program 46 times [2021-06-05 06:53:18,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:18,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049400492] [2021-06-05 06:53:18,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:18,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:19,033 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:19,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:19,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049400492] [2021-06-05 06:53:19,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049400492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:19,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547219537] [2021-06-05 06:53:19,033 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 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 06:53:19,057 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:53:19,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:53:19,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 06:53:19,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:19,303 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:19,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547219537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:19,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:19,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 06:53:19,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997478478] [2021-06-05 06:53:19,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:53:19,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:19,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:53:19,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:53:19,305 INFO L87 Difference]: Start difference. First operand 5827 states and 16828 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:19,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:19,542 INFO L93 Difference]: Finished difference Result 7509 states and 21608 transitions. [2021-06-05 06:53:19,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 06:53:19,542 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 06:53:19,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:19,551 INFO L225 Difference]: With dead ends: 7509 [2021-06-05 06:53:19,551 INFO L226 Difference]: Without dead ends: 7419 [2021-06-05 06:53:19,552 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 241.3ms TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:53:19,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7419 states. [2021-06-05 06:53:19,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7419 to 7227. [2021-06-05 06:53:19,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7227 states, 7226 states have (on average 2.9022972598948242) internal successors, (20972), 7226 states have internal predecessors, (20972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:19,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7227 states to 7227 states and 20972 transitions. [2021-06-05 06:53:19,659 INFO L78 Accepts]: Start accepts. Automaton has 7227 states and 20972 transitions. Word has length 34 [2021-06-05 06:53:19,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:19,659 INFO L482 AbstractCegarLoop]: Abstraction has 7227 states and 20972 transitions. [2021-06-05 06:53:19,659 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:19,659 INFO L276 IsEmpty]: Start isEmpty. Operand 7227 states and 20972 transitions. [2021-06-05 06:53:19,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 06:53:19,668 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:19,668 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:19,881 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:53:19,882 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:19,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:19,882 INFO L82 PathProgramCache]: Analyzing trace with hash 180516264, now seen corresponding path program 47 times [2021-06-05 06:53:19,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:19,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773527501] [2021-06-05 06:53:19,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:19,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:19,978 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:19,979 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:19,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773527501] [2021-06-05 06:53:19,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773527501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:19,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003410314] [2021-06-05 06:53:19,979 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 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 06:53:20,003 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:53:20,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:53:20,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 06:53:20,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:20,173 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:20,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003410314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:20,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:20,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 16 [2021-06-05 06:53:20,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556436901] [2021-06-05 06:53:20,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:53:20,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:20,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:53:20,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:53:20,174 INFO L87 Difference]: Start difference. First operand 7227 states and 20972 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:20,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:20,362 INFO L93 Difference]: Finished difference Result 7681 states and 22109 transitions. [2021-06-05 06:53:20,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 06:53:20,362 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 06:53:20,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:20,373 INFO L225 Difference]: With dead ends: 7681 [2021-06-05 06:53:20,373 INFO L226 Difference]: Without dead ends: 7573 [2021-06-05 06:53:20,373 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 181.2ms TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:53:20,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7573 states. [2021-06-05 06:53:20,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7573 to 7191. [2021-06-05 06:53:20,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7191 states, 7190 states have (on average 2.9009735744089014) internal successors, (20858), 7190 states have internal predecessors, (20858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:20,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7191 states to 7191 states and 20858 transitions. [2021-06-05 06:53:20,473 INFO L78 Accepts]: Start accepts. Automaton has 7191 states and 20858 transitions. Word has length 34 [2021-06-05 06:53:20,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:20,473 INFO L482 AbstractCegarLoop]: Abstraction has 7191 states and 20858 transitions. [2021-06-05 06:53:20,473 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:20,473 INFO L276 IsEmpty]: Start isEmpty. Operand 7191 states and 20858 transitions. [2021-06-05 06:53:20,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 06:53:20,483 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:20,483 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:20,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-06-05 06:53:20,705 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:20,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:20,705 INFO L82 PathProgramCache]: Analyzing trace with hash 576311422, now seen corresponding path program 48 times [2021-06-05 06:53:20,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:20,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661010225] [2021-06-05 06:53:20,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:20,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:20,814 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:20,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:20,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661010225] [2021-06-05 06:53:20,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661010225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:20,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104942331] [2021-06-05 06:53:20,815 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 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 06:53:20,846 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:53:20,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:53:20,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 06:53:20,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:21,066 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:21,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104942331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:21,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:21,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 06:53:21,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544885798] [2021-06-05 06:53:21,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:53:21,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:21,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:53:21,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:53:21,067 INFO L87 Difference]: Start difference. First operand 7191 states and 20858 transitions. Second operand has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:21,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:21,247 INFO L93 Difference]: Finished difference Result 8299 states and 23923 transitions. [2021-06-05 06:53:21,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 06:53:21,247 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 06:53:21,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:21,257 INFO L225 Difference]: With dead ends: 8299 [2021-06-05 06:53:21,257 INFO L226 Difference]: Without dead ends: 8182 [2021-06-05 06:53:21,257 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 213.7ms TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:53:21,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8182 states. [2021-06-05 06:53:21,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8182 to 7911. [2021-06-05 06:53:21,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7911 states, 7910 states have (on average 2.9107458912768647) internal successors, (23024), 7910 states have internal predecessors, (23024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:21,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7911 states to 7911 states and 23024 transitions. [2021-06-05 06:53:21,352 INFO L78 Accepts]: Start accepts. Automaton has 7911 states and 23024 transitions. Word has length 34 [2021-06-05 06:53:21,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:21,352 INFO L482 AbstractCegarLoop]: Abstraction has 7911 states and 23024 transitions. [2021-06-05 06:53:21,352 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:21,352 INFO L276 IsEmpty]: Start isEmpty. Operand 7911 states and 23024 transitions. [2021-06-05 06:53:21,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 06:53:21,361 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:21,361 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:21,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:53:21,565 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:21,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:21,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1774559878, now seen corresponding path program 49 times [2021-06-05 06:53:21,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:21,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855732142] [2021-06-05 06:53:21,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:21,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:21,657 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 06:53:21,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:21,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855732142] [2021-06-05 06:53:21,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855732142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:21,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120103418] [2021-06-05 06:53:21,658 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 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 06:53:21,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:21,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 06:53:21,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:21,862 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:21,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120103418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:21,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:21,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 06:53:21,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522672262] [2021-06-05 06:53:21,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:53:21,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:21,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:53:21,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:53:21,863 INFO L87 Difference]: Start difference. First operand 7911 states and 23024 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:22,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:22,064 INFO L93 Difference]: Finished difference Result 8695 states and 25141 transitions. [2021-06-05 06:53:22,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 06:53:22,064 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 06:53:22,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:22,075 INFO L225 Difference]: With dead ends: 8695 [2021-06-05 06:53:22,075 INFO L226 Difference]: Without dead ends: 8578 [2021-06-05 06:53:22,075 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 197.7ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:53:22,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8578 states. [2021-06-05 06:53:22,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8578 to 8323. [2021-06-05 06:53:22,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8323 states, 8322 states have (on average 2.918048546022591) internal successors, (24284), 8322 states have internal predecessors, (24284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:22,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8323 states to 8323 states and 24284 transitions. [2021-06-05 06:53:22,225 INFO L78 Accepts]: Start accepts. Automaton has 8323 states and 24284 transitions. Word has length 34 [2021-06-05 06:53:22,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:22,226 INFO L482 AbstractCegarLoop]: Abstraction has 8323 states and 24284 transitions. [2021-06-05 06:53:22,226 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:22,226 INFO L276 IsEmpty]: Start isEmpty. Operand 8323 states and 24284 transitions. [2021-06-05 06:53:22,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 06:53:22,234 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:22,234 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:22,435 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-06-05 06:53:22,435 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:22,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:22,435 INFO L82 PathProgramCache]: Analyzing trace with hash -1520972218, now seen corresponding path program 50 times [2021-06-05 06:53:22,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:22,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786172517] [2021-06-05 06:53:22,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:22,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:22,561 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:22,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:22,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786172517] [2021-06-05 06:53:22,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786172517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:22,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619128139] [2021-06-05 06:53:22,561 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 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 06:53:22,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:53:22,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:53:22,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 06:53:22,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:22,788 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:22,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619128139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:22,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:22,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 06:53:22,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224800149] [2021-06-05 06:53:22,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:53:22,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:22,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:53:22,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:53:22,789 INFO L87 Difference]: Start difference. First operand 8323 states and 24284 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:22,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:22,969 INFO L93 Difference]: Finished difference Result 8641 states and 24990 transitions. [2021-06-05 06:53:22,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 06:53:22,969 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 06:53:22,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:22,980 INFO L225 Difference]: With dead ends: 8641 [2021-06-05 06:53:22,980 INFO L226 Difference]: Without dead ends: 8565 [2021-06-05 06:53:22,980 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 250.8ms TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:53:22,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8565 states. [2021-06-05 06:53:23,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8565 to 8317. [2021-06-05 06:53:23,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8317 states, 8316 states have (on average 2.9183501683501682) internal successors, (24269), 8316 states have internal predecessors, (24269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:23,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8317 states to 8317 states and 24269 transitions. [2021-06-05 06:53:23,076 INFO L78 Accepts]: Start accepts. Automaton has 8317 states and 24269 transitions. Word has length 34 [2021-06-05 06:53:23,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:23,076 INFO L482 AbstractCegarLoop]: Abstraction has 8317 states and 24269 transitions. [2021-06-05 06:53:23,076 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:23,076 INFO L276 IsEmpty]: Start isEmpty. Operand 8317 states and 24269 transitions. [2021-06-05 06:53:23,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 06:53:23,085 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:23,086 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:23,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:53:23,286 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:23,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:23,286 INFO L82 PathProgramCache]: Analyzing trace with hash -339756294, now seen corresponding path program 51 times [2021-06-05 06:53:23,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:23,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547575078] [2021-06-05 06:53:23,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:23,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:23,427 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:23,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:23,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547575078] [2021-06-05 06:53:23,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547575078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:23,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723133599] [2021-06-05 06:53:23,427 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 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 06:53:23,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:53:23,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:53:23,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 06:53:23,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:23,592 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:23,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723133599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:23,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:23,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-05 06:53:23,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506495893] [2021-06-05 06:53:23,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:53:23,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:23,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:53:23,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:53:23,593 INFO L87 Difference]: Start difference. First operand 8317 states and 24269 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 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 06:53:23,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:23,754 INFO L93 Difference]: Finished difference Result 12332 states and 36170 transitions. [2021-06-05 06:53:23,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 06:53:23,754 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 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 34 [2021-06-05 06:53:23,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:23,771 INFO L225 Difference]: With dead ends: 12332 [2021-06-05 06:53:23,771 INFO L226 Difference]: Without dead ends: 12295 [2021-06-05 06:53:23,771 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 212.5ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:53:23,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12295 states. [2021-06-05 06:53:23,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12295 to 8325. [2021-06-05 06:53:23,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8325 states, 8324 states have (on average 2.917948101874099) internal successors, (24289), 8324 states have internal predecessors, (24289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:23,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8325 states to 8325 states and 24289 transitions. [2021-06-05 06:53:23,930 INFO L78 Accepts]: Start accepts. Automaton has 8325 states and 24289 transitions. Word has length 34 [2021-06-05 06:53:23,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:23,931 INFO L482 AbstractCegarLoop]: Abstraction has 8325 states and 24289 transitions. [2021-06-05 06:53:23,931 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 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 06:53:23,931 INFO L276 IsEmpty]: Start isEmpty. Operand 8325 states and 24289 transitions. [2021-06-05 06:53:23,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 06:53:23,940 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:23,940 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:24,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:53:24,140 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:24,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:24,141 INFO L82 PathProgramCache]: Analyzing trace with hash -2051845890, now seen corresponding path program 52 times [2021-06-05 06:53:24,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:24,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547552072] [2021-06-05 06:53:24,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:24,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:24,260 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:24,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:24,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547552072] [2021-06-05 06:53:24,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547552072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:24,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433689858] [2021-06-05 06:53:24,261 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 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 06:53:24,297 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:53:24,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:53:24,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 06:53:24,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:24,448 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:24,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433689858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:24,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:24,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 06:53:24,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182436637] [2021-06-05 06:53:24,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:53:24,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:24,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:53:24,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:53:24,449 INFO L87 Difference]: Start difference. First operand 8325 states and 24289 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 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 06:53:24,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:24,617 INFO L93 Difference]: Finished difference Result 12300 states and 36126 transitions. [2021-06-05 06:53:24,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 06:53:24,617 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 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 34 [2021-06-05 06:53:24,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:24,633 INFO L225 Difference]: With dead ends: 12300 [2021-06-05 06:53:24,633 INFO L226 Difference]: Without dead ends: 12263 [2021-06-05 06:53:24,633 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 197.7ms TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:53:24,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12263 states. [2021-06-05 06:53:24,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12263 to 8347. [2021-06-05 06:53:24,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8347 states, 8346 states have (on average 2.9180445722501798) internal successors, (24354), 8346 states have internal predecessors, (24354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:24,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8347 states to 8347 states and 24354 transitions. [2021-06-05 06:53:24,759 INFO L78 Accepts]: Start accepts. Automaton has 8347 states and 24354 transitions. Word has length 34 [2021-06-05 06:53:24,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:24,760 INFO L482 AbstractCegarLoop]: Abstraction has 8347 states and 24354 transitions. [2021-06-05 06:53:24,760 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 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 06:53:24,760 INFO L276 IsEmpty]: Start isEmpty. Operand 8347 states and 24354 transitions. [2021-06-05 06:53:24,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 06:53:24,771 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:24,771 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:24,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:53:24,972 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:24,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:24,972 INFO L82 PathProgramCache]: Analyzing trace with hash -1363343686, now seen corresponding path program 53 times [2021-06-05 06:53:24,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:24,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646181947] [2021-06-05 06:53:24,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:24,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:25,078 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:25,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:25,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646181947] [2021-06-05 06:53:25,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646181947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:25,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6627377] [2021-06-05 06:53:25,078 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 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 06:53:25,108 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:53:25,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:53:25,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 06:53:25,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:25,298 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:25,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6627377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:25,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:25,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 06:53:25,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204990573] [2021-06-05 06:53:25,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:53:25,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:25,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:53:25,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:53:25,303 INFO L87 Difference]: Start difference. First operand 8347 states and 24354 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 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 06:53:25,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:25,561 INFO L93 Difference]: Finished difference Result 12845 states and 37674 transitions. [2021-06-05 06:53:25,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 06:53:25,561 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 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 34 [2021-06-05 06:53:25,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:25,580 INFO L225 Difference]: With dead ends: 12845 [2021-06-05 06:53:25,580 INFO L226 Difference]: Without dead ends: 12771 [2021-06-05 06:53:25,580 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 195.9ms TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:53:25,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12771 states. [2021-06-05 06:53:25,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12771 to 8781. [2021-06-05 06:53:25,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8781 states, 8780 states have (on average 2.9197038724373576) internal successors, (25635), 8780 states have internal predecessors, (25635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:25,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8781 states to 8781 states and 25635 transitions. [2021-06-05 06:53:25,727 INFO L78 Accepts]: Start accepts. Automaton has 8781 states and 25635 transitions. Word has length 34 [2021-06-05 06:53:25,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:25,727 INFO L482 AbstractCegarLoop]: Abstraction has 8781 states and 25635 transitions. [2021-06-05 06:53:25,728 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 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 06:53:25,728 INFO L276 IsEmpty]: Start isEmpty. Operand 8781 states and 25635 transitions. [2021-06-05 06:53:25,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 06:53:25,737 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:25,737 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:25,937 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:53:25,938 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:25,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:25,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1176620350, now seen corresponding path program 54 times [2021-06-05 06:53:25,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:25,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185853226] [2021-06-05 06:53:25,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:25,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:26,043 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:26,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:26,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185853226] [2021-06-05 06:53:26,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185853226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:26,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532849645] [2021-06-05 06:53:26,044 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 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 06:53:26,067 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:53:26,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:53:26,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:53:26,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:26,242 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:26,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532849645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:26,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:26,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 06:53:26,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601938200] [2021-06-05 06:53:26,243 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 06:53:26,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:26,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 06:53:26,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:53:26,243 INFO L87 Difference]: Start difference. First operand 8781 states and 25635 transitions. Second operand has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:26,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:26,827 INFO L93 Difference]: Finished difference Result 14288 states and 41566 transitions. [2021-06-05 06:53:26,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 06:53:26,828 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 06:53:26,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:26,847 INFO L225 Difference]: With dead ends: 14288 [2021-06-05 06:53:26,847 INFO L226 Difference]: Without dead ends: 14180 [2021-06-05 06:53:26,848 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 486.6ms TimeCoverageRelationStatistics Valid=155, Invalid=1177, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 06:53:26,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14180 states. [2021-06-05 06:53:27,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14180 to 9669. [2021-06-05 06:53:27,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9669 states, 9668 states have (on average 2.929354571783202) internal successors, (28321), 9668 states have internal predecessors, (28321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:27,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9669 states to 9669 states and 28321 transitions. [2021-06-05 06:53:27,027 INFO L78 Accepts]: Start accepts. Automaton has 9669 states and 28321 transitions. Word has length 34 [2021-06-05 06:53:27,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:27,027 INFO L482 AbstractCegarLoop]: Abstraction has 9669 states and 28321 transitions. [2021-06-05 06:53:27,027 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:27,027 INFO L276 IsEmpty]: Start isEmpty. Operand 9669 states and 28321 transitions. [2021-06-05 06:53:27,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 06:53:27,038 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:27,038 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:27,238 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-06-05 06:53:27,239 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:27,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:27,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1063331952, now seen corresponding path program 55 times [2021-06-05 06:53:27,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:27,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907528471] [2021-06-05 06:53:27,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:27,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:27,363 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:27,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:27,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907528471] [2021-06-05 06:53:27,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907528471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:27,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383909619] [2021-06-05 06:53:27,364 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 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 06:53:27,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:27,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 06:53:27,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:27,564 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:27,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383909619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:27,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:27,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 06:53:27,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111824458] [2021-06-05 06:53:27,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:53:27,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:27,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:53:27,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:53:27,565 INFO L87 Difference]: Start difference. First operand 9669 states and 28321 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 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 06:53:27,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:27,724 INFO L93 Difference]: Finished difference Result 10725 states and 31154 transitions. [2021-06-05 06:53:27,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 06:53:27,725 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 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 34 [2021-06-05 06:53:27,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:27,738 INFO L225 Difference]: With dead ends: 10725 [2021-06-05 06:53:27,738 INFO L226 Difference]: Without dead ends: 10651 [2021-06-05 06:53:27,739 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 227.1ms TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:53:27,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10651 states. [2021-06-05 06:53:27,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10651 to 10003. [2021-06-05 06:53:27,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10003 states, 10002 states have (on average 2.931613677264547) internal successors, (29322), 10002 states have internal predecessors, (29322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:27,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10003 states to 10003 states and 29322 transitions. [2021-06-05 06:53:27,871 INFO L78 Accepts]: Start accepts. Automaton has 10003 states and 29322 transitions. Word has length 34 [2021-06-05 06:53:27,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:27,871 INFO L482 AbstractCegarLoop]: Abstraction has 10003 states and 29322 transitions. [2021-06-05 06:53:27,871 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 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 06:53:27,871 INFO L276 IsEmpty]: Start isEmpty. Operand 10003 states and 29322 transitions. [2021-06-05 06:53:27,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 06:53:27,882 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:27,882 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:28,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:53:28,085 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:28,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:28,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1983656864, now seen corresponding path program 56 times [2021-06-05 06:53:28,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:28,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288192340] [2021-06-05 06:53:28,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:28,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:28,183 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:28,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:28,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288192340] [2021-06-05 06:53:28,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288192340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:28,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637187169] [2021-06-05 06:53:28,184 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 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 06:53:28,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:53:28,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:53:28,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 06:53:28,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:28,369 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:28,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637187169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:28,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:28,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-06-05 06:53:28,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205282471] [2021-06-05 06:53:28,369 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:53:28,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:28,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:53:28,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:53:28,370 INFO L87 Difference]: Start difference. First operand 10003 states and 29322 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 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 06:53:28,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:28,549 INFO L93 Difference]: Finished difference Result 10805 states and 31382 transitions. [2021-06-05 06:53:28,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 06:53:28,549 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 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 34 [2021-06-05 06:53:28,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:28,563 INFO L225 Difference]: With dead ends: 10805 [2021-06-05 06:53:28,563 INFO L226 Difference]: Without dead ends: 10731 [2021-06-05 06:53:28,563 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 201.5ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:53:28,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10731 states. [2021-06-05 06:53:28,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10731 to 9581. [2021-06-05 06:53:28,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9581 states, 9580 states have (on average 2.9305845511482254) internal successors, (28075), 9580 states have internal predecessors, (28075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:28,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9581 states to 9581 states and 28075 transitions. [2021-06-05 06:53:28,725 INFO L78 Accepts]: Start accepts. Automaton has 9581 states and 28075 transitions. Word has length 34 [2021-06-05 06:53:28,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:28,725 INFO L482 AbstractCegarLoop]: Abstraction has 9581 states and 28075 transitions. [2021-06-05 06:53:28,725 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 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 06:53:28,725 INFO L276 IsEmpty]: Start isEmpty. Operand 9581 states and 28075 transitions. [2021-06-05 06:53:28,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 06:53:28,736 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:28,736 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:28,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:53:28,937 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:28,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:28,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1691006202, now seen corresponding path program 57 times [2021-06-05 06:53:28,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:28,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078303228] [2021-06-05 06:53:28,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:28,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:29,034 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:29,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:29,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078303228] [2021-06-05 06:53:29,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078303228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:29,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444162865] [2021-06-05 06:53:29,035 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 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 06:53:29,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:53:29,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:53:29,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 06:53:29,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:29,244 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:29,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444162865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:29,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:29,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-06-05 06:53:29,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735960843] [2021-06-05 06:53:29,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:53:29,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:29,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:53:29,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:53:29,245 INFO L87 Difference]: Start difference. First operand 9581 states and 28075 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 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 06:53:29,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:29,504 INFO L93 Difference]: Finished difference Result 11489 states and 33477 transitions. [2021-06-05 06:53:29,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 06:53:29,504 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 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 34 [2021-06-05 06:53:29,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:29,519 INFO L225 Difference]: With dead ends: 11489 [2021-06-05 06:53:29,519 INFO L226 Difference]: Without dead ends: 11399 [2021-06-05 06:53:29,519 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 212.9ms TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:53:29,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11399 states. [2021-06-05 06:53:29,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11399 to 10345. [2021-06-05 06:53:29,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10345 states, 10344 states have (on average 2.93899845320959) internal successors, (30401), 10344 states have internal predecessors, (30401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:29,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10345 states to 10345 states and 30401 transitions. [2021-06-05 06:53:29,654 INFO L78 Accepts]: Start accepts. Automaton has 10345 states and 30401 transitions. Word has length 34 [2021-06-05 06:53:29,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:29,654 INFO L482 AbstractCegarLoop]: Abstraction has 10345 states and 30401 transitions. [2021-06-05 06:53:29,654 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 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 06:53:29,655 INFO L276 IsEmpty]: Start isEmpty. Operand 10345 states and 30401 transitions. [2021-06-05 06:53:29,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 06:53:29,666 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:29,666 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:29,866 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:53:29,867 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:29,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:29,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1810089214, now seen corresponding path program 58 times [2021-06-05 06:53:29,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:29,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816118075] [2021-06-05 06:53:29,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:29,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:29,966 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 06:53:29,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:29,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816118075] [2021-06-05 06:53:29,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816118075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:29,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223800996] [2021-06-05 06:53:29,966 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 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 06:53:29,996 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:53:29,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:53:29,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 06:53:29,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:30,167 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:30,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223800996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:30,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:30,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-06-05 06:53:30,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096487077] [2021-06-05 06:53:30,168 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:53:30,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:30,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:53:30,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:53:30,168 INFO L87 Difference]: Start difference. First operand 10345 states and 30401 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 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 06:53:30,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:30,397 INFO L93 Difference]: Finished difference Result 11481 states and 33447 transitions. [2021-06-05 06:53:30,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 06:53:30,398 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 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 34 [2021-06-05 06:53:30,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:30,413 INFO L225 Difference]: With dead ends: 11481 [2021-06-05 06:53:30,413 INFO L226 Difference]: Without dead ends: 11365 [2021-06-05 06:53:30,413 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 223.8ms TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:53:30,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11365 states. [2021-06-05 06:53:30,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11365 to 10339. [2021-06-05 06:53:30,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10339 states, 10338 states have (on average 2.9367382472431807) internal successors, (30360), 10338 states have internal predecessors, (30360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:30,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10339 states to 10339 states and 30360 transitions. [2021-06-05 06:53:30,570 INFO L78 Accepts]: Start accepts. Automaton has 10339 states and 30360 transitions. Word has length 34 [2021-06-05 06:53:30,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:30,570 INFO L482 AbstractCegarLoop]: Abstraction has 10339 states and 30360 transitions. [2021-06-05 06:53:30,570 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 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 06:53:30,571 INFO L276 IsEmpty]: Start isEmpty. Operand 10339 states and 30360 transitions. [2021-06-05 06:53:30,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 06:53:30,582 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:30,582 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:30,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-06-05 06:53:30,783 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:30,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:30,783 INFO L82 PathProgramCache]: Analyzing trace with hash -1665801632, now seen corresponding path program 59 times [2021-06-05 06:53:30,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:30,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255139745] [2021-06-05 06:53:30,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:30,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:30,877 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:30,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:30,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255139745] [2021-06-05 06:53:30,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255139745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:30,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244539786] [2021-06-05 06:53:30,878 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 06:53:30,902 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 06:53:30,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:53:30,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 06:53:30,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:31,070 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:31,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244539786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:31,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:31,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 06:53:31,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520491180] [2021-06-05 06:53:31,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:53:31,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:31,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:53:31,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:53:31,071 INFO L87 Difference]: Start difference. First operand 10339 states and 30360 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 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 06:53:31,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:31,335 INFO L93 Difference]: Finished difference Result 11183 states and 32491 transitions. [2021-06-05 06:53:31,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 06:53:31,335 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 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 34 [2021-06-05 06:53:31,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:31,349 INFO L225 Difference]: With dead ends: 11183 [2021-06-05 06:53:31,349 INFO L226 Difference]: Without dead ends: 11066 [2021-06-05 06:53:31,349 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 216.0ms TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-05 06:53:31,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11066 states. [2021-06-05 06:53:31,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11066 to 9849. [2021-06-05 06:53:31,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9849 states, 9848 states have (on average 2.933489033306255) internal successors, (28889), 9848 states have internal predecessors, (28889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:31,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9849 states to 9849 states and 28889 transitions. [2021-06-05 06:53:31,476 INFO L78 Accepts]: Start accepts. Automaton has 9849 states and 28889 transitions. Word has length 34 [2021-06-05 06:53:31,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:31,476 INFO L482 AbstractCegarLoop]: Abstraction has 9849 states and 28889 transitions. [2021-06-05 06:53:31,476 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 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 06:53:31,476 INFO L276 IsEmpty]: Start isEmpty. Operand 9849 states and 28889 transitions. [2021-06-05 06:53:31,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 06:53:31,487 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:31,487 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:31,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:53:31,688 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:31,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:31,688 INFO L82 PathProgramCache]: Analyzing trace with hash 1957855712, now seen corresponding path program 60 times [2021-06-05 06:53:31,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:31,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115107997] [2021-06-05 06:53:31,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:31,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:31,813 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:31,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:31,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115107997] [2021-06-05 06:53:31,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115107997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:31,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807943481] [2021-06-05 06:53:31,814 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 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 06:53:31,845 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:53:31,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:53:31,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 06:53:31,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:32,033 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:32,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807943481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:32,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:32,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 06:53:32,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517465206] [2021-06-05 06:53:32,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:53:32,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:32,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:53:32,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:53:32,034 INFO L87 Difference]: Start difference. First operand 9849 states and 28889 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:32,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:32,316 INFO L93 Difference]: Finished difference Result 11201 states and 32696 transitions. [2021-06-05 06:53:32,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 06:53:32,316 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 06:53:32,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:32,331 INFO L225 Difference]: With dead ends: 11201 [2021-06-05 06:53:32,331 INFO L226 Difference]: Without dead ends: 11107 [2021-06-05 06:53:32,331 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 247.4ms TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:53:32,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11107 states. [2021-06-05 06:53:32,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11107 to 10839. [2021-06-05 06:53:32,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10839 states, 10838 states have (on average 2.9409485144860676) internal successors, (31874), 10838 states have internal predecessors, (31874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:32,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10839 states to 10839 states and 31874 transitions. [2021-06-05 06:53:32,522 INFO L78 Accepts]: Start accepts. Automaton has 10839 states and 31874 transitions. Word has length 34 [2021-06-05 06:53:32,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:32,522 INFO L482 AbstractCegarLoop]: Abstraction has 10839 states and 31874 transitions. [2021-06-05 06:53:32,522 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:32,522 INFO L276 IsEmpty]: Start isEmpty. Operand 10839 states and 31874 transitions. [2021-06-05 06:53:32,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 06:53:32,538 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:32,538 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:32,738 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-06-05 06:53:32,739 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:32,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:32,739 INFO L82 PathProgramCache]: Analyzing trace with hash 1517139066, now seen corresponding path program 61 times [2021-06-05 06:53:32,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:32,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737271786] [2021-06-05 06:53:32,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:32,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:32,839 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:32,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:32,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737271786] [2021-06-05 06:53:32,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737271786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:32,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456678253] [2021-06-05 06:53:32,839 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 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 06:53:32,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:32,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 06:53:32,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:33,045 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:33,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456678253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:33,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:33,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 06:53:33,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9122571] [2021-06-05 06:53:33,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:53:33,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:33,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:53:33,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:53:33,046 INFO L87 Difference]: Start difference. First operand 10839 states and 31874 transitions. Second operand has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:33,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:33,331 INFO L93 Difference]: Finished difference Result 11645 states and 34056 transitions. [2021-06-05 06:53:33,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 06:53:33,331 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 06:53:33,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:33,352 INFO L225 Difference]: With dead ends: 11645 [2021-06-05 06:53:33,352 INFO L226 Difference]: Without dead ends: 11537 [2021-06-05 06:53:33,352 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 214.8ms TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:53:33,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11537 states. [2021-06-05 06:53:33,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11537 to 10493. [2021-06-05 06:53:33,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10493 states, 10492 states have (on average 2.9400495615707207) internal successors, (30847), 10492 states have internal predecessors, (30847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:33,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10493 states to 10493 states and 30847 transitions. [2021-06-05 06:53:33,552 INFO L78 Accepts]: Start accepts. Automaton has 10493 states and 30847 transitions. Word has length 34 [2021-06-05 06:53:33,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:33,552 INFO L482 AbstractCegarLoop]: Abstraction has 10493 states and 30847 transitions. [2021-06-05 06:53:33,552 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:33,552 INFO L276 IsEmpty]: Start isEmpty. Operand 10493 states and 30847 transitions. [2021-06-05 06:53:33,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 06:53:33,566 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:33,566 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:33,767 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-06-05 06:53:33,767 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:33,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:33,767 INFO L82 PathProgramCache]: Analyzing trace with hash -1039269088, now seen corresponding path program 62 times [2021-06-05 06:53:33,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:33,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048751840] [2021-06-05 06:53:33,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:33,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:33,848 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:33,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:33,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048751840] [2021-06-05 06:53:33,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048751840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:33,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483272376] [2021-06-05 06:53:33,849 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 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 06:53:33,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:53:33,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:53:33,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 06:53:33,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:34,050 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:34,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483272376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:34,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:34,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 16 [2021-06-05 06:53:34,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127885511] [2021-06-05 06:53:34,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:53:34,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:34,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:53:34,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:53:34,051 INFO L87 Difference]: Start difference. First operand 10493 states and 30847 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:34,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:34,231 INFO L93 Difference]: Finished difference Result 12117 states and 35549 transitions. [2021-06-05 06:53:34,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 06:53:34,231 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 06:53:34,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:34,248 INFO L225 Difference]: With dead ends: 12117 [2021-06-05 06:53:34,248 INFO L226 Difference]: Without dead ends: 12035 [2021-06-05 06:53:34,249 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 188.7ms TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:53:34,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12035 states. [2021-06-05 06:53:34,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12035 to 11671. [2021-06-05 06:53:34,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11671 states, 11670 states have (on average 2.948928877463582) internal successors, (34414), 11670 states have internal predecessors, (34414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:34,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11671 states to 11671 states and 34414 transitions. [2021-06-05 06:53:34,428 INFO L78 Accepts]: Start accepts. Automaton has 11671 states and 34414 transitions. Word has length 34 [2021-06-05 06:53:34,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:34,428 INFO L482 AbstractCegarLoop]: Abstraction has 11671 states and 34414 transitions. [2021-06-05 06:53:34,428 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:34,428 INFO L276 IsEmpty]: Start isEmpty. Operand 11671 states and 34414 transitions. [2021-06-05 06:53:34,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 06:53:34,442 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:34,442 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:34,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-06-05 06:53:34,642 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:34,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:34,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1158352100, now seen corresponding path program 63 times [2021-06-05 06:53:34,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:34,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293705076] [2021-06-05 06:53:34,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:34,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:34,726 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:53:34,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:34,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293705076] [2021-06-05 06:53:34,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293705076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:34,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66843748] [2021-06-05 06:53:34,726 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 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 06:53:34,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:53:34,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:53:34,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 06:53:34,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:34,946 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:34,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66843748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:34,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:34,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 16 [2021-06-05 06:53:34,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987360814] [2021-06-05 06:53:34,947 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:53:34,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:34,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:53:34,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:53:34,947 INFO L87 Difference]: Start difference. First operand 11671 states and 34414 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:35,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:35,153 INFO L93 Difference]: Finished difference Result 12114 states and 35537 transitions. [2021-06-05 06:53:35,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 06:53:35,153 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 06:53:35,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:35,169 INFO L225 Difference]: With dead ends: 12114 [2021-06-05 06:53:35,169 INFO L226 Difference]: Without dead ends: 12002 [2021-06-05 06:53:35,169 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 182.3ms TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:53:35,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12002 states. [2021-06-05 06:53:35,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12002 to 11231. [2021-06-05 06:53:35,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11231 states, 11230 states have (on average 2.943900267141585) internal successors, (33060), 11230 states have internal predecessors, (33060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:35,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11231 states to 11231 states and 33060 transitions. [2021-06-05 06:53:35,312 INFO L78 Accepts]: Start accepts. Automaton has 11231 states and 33060 transitions. Word has length 34 [2021-06-05 06:53:35,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:35,312 INFO L482 AbstractCegarLoop]: Abstraction has 11231 states and 33060 transitions. [2021-06-05 06:53:35,312 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:35,313 INFO L276 IsEmpty]: Start isEmpty. Operand 11231 states and 33060 transitions. [2021-06-05 06:53:35,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 06:53:35,325 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:35,325 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:35,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:53:35,529 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:35,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:35,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1014064518, now seen corresponding path program 64 times [2021-06-05 06:53:35,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:35,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470310493] [2021-06-05 06:53:35,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:35,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:35,622 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 06:53:35,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:35,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470310493] [2021-06-05 06:53:35,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470310493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:35,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026037064] [2021-06-05 06:53:35,622 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 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 06:53:35,654 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:53:35,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:53:35,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 06:53:35,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:35,809 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:35,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026037064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:35,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:35,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 06:53:35,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286743936] [2021-06-05 06:53:35,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:53:35,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:35,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:53:35,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:53:35,810 INFO L87 Difference]: Start difference. First operand 11231 states and 33060 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:36,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:36,119 INFO L93 Difference]: Finished difference Result 12011 states and 35167 transitions. [2021-06-05 06:53:36,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 06:53:36,120 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 06:53:36,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:36,137 INFO L225 Difference]: With dead ends: 12011 [2021-06-05 06:53:36,137 INFO L226 Difference]: Without dead ends: 11894 [2021-06-05 06:53:36,137 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 205.8ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:53:36,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11894 states. [2021-06-05 06:53:36,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11894 to 11643. [2021-06-05 06:53:36,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11643 states, 11642 states have (on average 2.9479470881291876) internal successors, (34320), 11642 states have internal predecessors, (34320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:36,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11643 states to 11643 states and 34320 transitions. [2021-06-05 06:53:36,336 INFO L78 Accepts]: Start accepts. Automaton has 11643 states and 34320 transitions. Word has length 34 [2021-06-05 06:53:36,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:36,336 INFO L482 AbstractCegarLoop]: Abstraction has 11643 states and 34320 transitions. [2021-06-05 06:53:36,336 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:36,336 INFO L276 IsEmpty]: Start isEmpty. Operand 11643 states and 34320 transitions. [2021-06-05 06:53:36,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 06:53:36,351 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:36,351 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:36,551 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:53:36,551 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:36,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:36,551 INFO L82 PathProgramCache]: Analyzing trace with hash -14629318, now seen corresponding path program 65 times [2021-06-05 06:53:36,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:36,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954445707] [2021-06-05 06:53:36,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:36,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:36,673 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:36,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:36,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954445707] [2021-06-05 06:53:36,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954445707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:36,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140711567] [2021-06-05 06:53:36,673 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 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 06:53:36,696 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:53:36,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:53:36,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 06:53:36,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:36,858 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:36,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140711567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:36,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:36,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 06:53:36,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218426577] [2021-06-05 06:53:36,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:53:36,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:36,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:53:36,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:53:36,859 INFO L87 Difference]: Start difference. First operand 11643 states and 34320 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:37,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:37,079 INFO L93 Difference]: Finished difference Result 11957 states and 35016 transitions. [2021-06-05 06:53:37,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 06:53:37,079 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 06:53:37,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:37,096 INFO L225 Difference]: With dead ends: 11957 [2021-06-05 06:53:37,096 INFO L226 Difference]: Without dead ends: 11881 [2021-06-05 06:53:37,096 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 224.2ms TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:53:37,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11881 states. [2021-06-05 06:53:37,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11881 to 10363. [2021-06-05 06:53:37,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10363 states, 10362 states have (on average 2.945377340281799) internal successors, (30520), 10362 states have internal predecessors, (30520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:37,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10363 states to 10363 states and 30520 transitions. [2021-06-05 06:53:37,235 INFO L78 Accepts]: Start accepts. Automaton has 10363 states and 30520 transitions. Word has length 34 [2021-06-05 06:53:37,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:37,235 INFO L482 AbstractCegarLoop]: Abstraction has 10363 states and 30520 transitions. [2021-06-05 06:53:37,236 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:37,236 INFO L276 IsEmpty]: Start isEmpty. Operand 10363 states and 30520 transitions. [2021-06-05 06:53:37,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 06:53:37,247 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:37,247 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:37,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:53:37,448 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:37,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:37,448 INFO L82 PathProgramCache]: Analyzing trace with hash -826580692, now seen corresponding path program 66 times [2021-06-05 06:53:37,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:37,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169382341] [2021-06-05 06:53:37,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:37,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:37,482 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:37,482 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:37,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169382341] [2021-06-05 06:53:37,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169382341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:37,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352654573] [2021-06-05 06:53:37,483 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 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 06:53:37,507 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:53:37,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:53:37,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:53:37,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:37,580 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:37,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352654573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:37,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:37,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 06:53:37,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781103165] [2021-06-05 06:53:37,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 06:53:37,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:37,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 06:53:37,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:53:37,581 INFO L87 Difference]: Start difference. First operand 10363 states and 30520 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 06:53:37,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:37,756 INFO L93 Difference]: Finished difference Result 14684 states and 43273 transitions. [2021-06-05 06:53:37,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 06:53:37,756 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 37 [2021-06-05 06:53:37,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:37,776 INFO L225 Difference]: With dead ends: 14684 [2021-06-05 06:53:37,776 INFO L226 Difference]: Without dead ends: 14684 [2021-06-05 06:53:37,777 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 94.9ms TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:53:37,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14684 states. [2021-06-05 06:53:37,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14684 to 10709. [2021-06-05 06:53:37,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10709 states, 10708 states have (on average 2.941912588718715) internal successors, (31502), 10708 states have internal predecessors, (31502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:37,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10709 states to 10709 states and 31502 transitions. [2021-06-05 06:53:37,939 INFO L78 Accepts]: Start accepts. Automaton has 10709 states and 31502 transitions. Word has length 37 [2021-06-05 06:53:37,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:37,939 INFO L482 AbstractCegarLoop]: Abstraction has 10709 states and 31502 transitions. [2021-06-05 06:53:37,939 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 06:53:37,939 INFO L276 IsEmpty]: Start isEmpty. Operand 10709 states and 31502 transitions. [2021-06-05 06:53:38,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 06:53:38,017 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:38,017 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:38,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-06-05 06:53:38,218 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:38,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:38,218 INFO L82 PathProgramCache]: Analyzing trace with hash -179080118, now seen corresponding path program 67 times [2021-06-05 06:53:38,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:38,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642483137] [2021-06-05 06:53:38,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:38,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:38,255 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:38,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:38,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642483137] [2021-06-05 06:53:38,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642483137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:38,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261874344] [2021-06-05 06:53:38,255 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 06:53:38,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:38,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:53:38,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:38,357 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:38,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261874344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:38,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:38,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 06:53:38,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527873701] [2021-06-05 06:53:38,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 06:53:38,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:38,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 06:53:38,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:53:38,358 INFO L87 Difference]: Start difference. First operand 10709 states and 31502 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 06:53:38,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:38,532 INFO L93 Difference]: Finished difference Result 17639 states and 51455 transitions. [2021-06-05 06:53:38,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 06:53:38,533 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 37 [2021-06-05 06:53:38,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:38,566 INFO L225 Difference]: With dead ends: 17639 [2021-06-05 06:53:38,566 INFO L226 Difference]: Without dead ends: 17573 [2021-06-05 06:53:38,567 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 100.0ms TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:53:38,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17573 states. [2021-06-05 06:53:38,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17573 to 10709. [2021-06-05 06:53:38,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10709 states, 10708 states have (on average 2.941072095629436) internal successors, (31493), 10708 states have internal predecessors, (31493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:38,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10709 states to 10709 states and 31493 transitions. [2021-06-05 06:53:38,804 INFO L78 Accepts]: Start accepts. Automaton has 10709 states and 31493 transitions. Word has length 37 [2021-06-05 06:53:38,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:38,804 INFO L482 AbstractCegarLoop]: Abstraction has 10709 states and 31493 transitions. [2021-06-05 06:53:38,804 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 06:53:38,804 INFO L276 IsEmpty]: Start isEmpty. Operand 10709 states and 31493 transitions. [2021-06-05 06:53:38,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 06:53:38,816 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:38,816 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:39,018 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-06-05 06:53:39,018 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:39,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:39,018 INFO L82 PathProgramCache]: Analyzing trace with hash 1381181770, now seen corresponding path program 68 times [2021-06-05 06:53:39,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:39,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289635183] [2021-06-05 06:53:39,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:39,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:39,051 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:39,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:39,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289635183] [2021-06-05 06:53:39,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289635183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:39,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911679221] [2021-06-05 06:53:39,052 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 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 06:53:39,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:53:39,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:53:39,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:53:39,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:39,171 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:39,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911679221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:39,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:39,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 06:53:39,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516075585] [2021-06-05 06:53:39,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:53:39,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:39,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:53:39,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:53:39,172 INFO L87 Difference]: Start difference. First operand 10709 states and 31493 transitions. Second operand has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 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 06:53:39,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:39,651 INFO L93 Difference]: Finished difference Result 22210 states and 64100 transitions. [2021-06-05 06:53:39,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 06:53:39,652 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 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 37 [2021-06-05 06:53:39,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:39,682 INFO L225 Difference]: With dead ends: 22210 [2021-06-05 06:53:39,682 INFO L226 Difference]: Without dead ends: 22204 [2021-06-05 06:53:39,682 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 320.9ms TimeCoverageRelationStatistics Valid=578, Invalid=1314, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 06:53:39,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22204 states. [2021-06-05 06:53:39,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22204 to 14316. [2021-06-05 06:53:40,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14316 states, 14315 states have (on average 2.958435207823961) internal successors, (42350), 14315 states have internal predecessors, (42350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:40,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14316 states to 14316 states and 42350 transitions. [2021-06-05 06:53:40,032 INFO L78 Accepts]: Start accepts. Automaton has 14316 states and 42350 transitions. Word has length 37 [2021-06-05 06:53:40,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:40,032 INFO L482 AbstractCegarLoop]: Abstraction has 14316 states and 42350 transitions. [2021-06-05 06:53:40,032 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 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 06:53:40,032 INFO L276 IsEmpty]: Start isEmpty. Operand 14316 states and 42350 transitions. [2021-06-05 06:53:40,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 06:53:40,050 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:40,050 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:40,250 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-06-05 06:53:40,250 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:40,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:40,251 INFO L82 PathProgramCache]: Analyzing trace with hash 1170484724, now seen corresponding path program 69 times [2021-06-05 06:53:40,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:40,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604205842] [2021-06-05 06:53:40,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:40,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:40,283 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:40,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:40,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604205842] [2021-06-05 06:53:40,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604205842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:40,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728342464] [2021-06-05 06:53:40,284 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 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 06:53:40,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 06:53:40,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:53:40,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:53:40,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:40,399 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:40,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728342464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:40,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:40,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 06:53:40,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309951962] [2021-06-05 06:53:40,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:53:40,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:40,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:53:40,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:53:40,400 INFO L87 Difference]: Start difference. First operand 14316 states and 42350 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 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 06:53:40,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:40,801 INFO L93 Difference]: Finished difference Result 18669 states and 54267 transitions. [2021-06-05 06:53:40,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 06:53:40,802 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 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 37 [2021-06-05 06:53:40,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:40,829 INFO L225 Difference]: With dead ends: 18669 [2021-06-05 06:53:40,829 INFO L226 Difference]: Without dead ends: 18657 [2021-06-05 06:53:40,829 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 229.3ms TimeCoverageRelationStatistics Valid=417, Invalid=773, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 06:53:40,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18657 states. [2021-06-05 06:53:41,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18657 to 15376. [2021-06-05 06:53:41,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15376 states, 15375 states have (on average 2.9668943089430893) internal successors, (45616), 15375 states have internal predecessors, (45616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:41,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15376 states to 15376 states and 45616 transitions. [2021-06-05 06:53:41,077 INFO L78 Accepts]: Start accepts. Automaton has 15376 states and 45616 transitions. Word has length 37 [2021-06-05 06:53:41,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:41,077 INFO L482 AbstractCegarLoop]: Abstraction has 15376 states and 45616 transitions. [2021-06-05 06:53:41,077 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 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 06:53:41,077 INFO L276 IsEmpty]: Start isEmpty. Operand 15376 states and 45616 transitions. [2021-06-05 06:53:41,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 06:53:41,096 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:41,096 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:41,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:53:41,296 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:41,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:41,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1899236542, now seen corresponding path program 70 times [2021-06-05 06:53:41,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:41,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892123357] [2021-06-05 06:53:41,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:41,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:41,331 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:41,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:41,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892123357] [2021-06-05 06:53:41,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892123357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:41,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947295564] [2021-06-05 06:53:41,332 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 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 06:53:41,359 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:53:41,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:53:41,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:53:41,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:41,434 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:41,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947295564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:41,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:41,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 06:53:41,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806270826] [2021-06-05 06:53:41,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:53:41,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:41,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:53:41,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:53:41,435 INFO L87 Difference]: Start difference. First operand 15376 states and 45616 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 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 06:53:41,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:41,892 INFO L93 Difference]: Finished difference Result 19128 states and 55390 transitions. [2021-06-05 06:53:41,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 06:53:41,892 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 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 37 [2021-06-05 06:53:41,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:41,918 INFO L225 Difference]: With dead ends: 19128 [2021-06-05 06:53:41,918 INFO L226 Difference]: Without dead ends: 19128 [2021-06-05 06:53:41,919 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 286.9ms TimeCoverageRelationStatistics Valid=568, Invalid=1072, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 06:53:41,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19128 states. [2021-06-05 06:53:42,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19128 to 13924. [2021-06-05 06:53:42,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13924 states, 13923 states have (on average 2.95970695970696) internal successors, (41208), 13923 states have internal predecessors, (41208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:42,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13924 states to 13924 states and 41208 transitions. [2021-06-05 06:53:42,195 INFO L78 Accepts]: Start accepts. Automaton has 13924 states and 41208 transitions. Word has length 37 [2021-06-05 06:53:42,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:42,195 INFO L482 AbstractCegarLoop]: Abstraction has 13924 states and 41208 transitions. [2021-06-05 06:53:42,195 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 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 06:53:42,196 INFO L276 IsEmpty]: Start isEmpty. Operand 13924 states and 41208 transitions. [2021-06-05 06:53:42,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 06:53:42,212 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:42,212 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:42,413 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-06-05 06:53:42,413 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:42,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:42,413 INFO L82 PathProgramCache]: Analyzing trace with hash 1522265388, now seen corresponding path program 71 times [2021-06-05 06:53:42,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:42,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91814321] [2021-06-05 06:53:42,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:42,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:42,448 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:42,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:42,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91814321] [2021-06-05 06:53:42,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91814321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:42,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836805742] [2021-06-05 06:53:42,449 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 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 06:53:42,475 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:53:42,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:53:42,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:53:42,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:42,549 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:42,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836805742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:42,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:42,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 06:53:42,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694335048] [2021-06-05 06:53:42,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:53:42,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:42,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:53:42,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:53:42,550 INFO L87 Difference]: Start difference. First operand 13924 states and 41208 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 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 06:53:42,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:42,928 INFO L93 Difference]: Finished difference Result 21416 states and 61999 transitions. [2021-06-05 06:53:42,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 06:53:42,928 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 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 37 [2021-06-05 06:53:42,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:42,957 INFO L225 Difference]: With dead ends: 21416 [2021-06-05 06:53:42,958 INFO L226 Difference]: Without dead ends: 21402 [2021-06-05 06:53:42,958 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 221.1ms TimeCoverageRelationStatistics Valid=303, Invalid=819, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 06:53:42,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21402 states. [2021-06-05 06:53:43,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21402 to 12522. [2021-06-05 06:53:43,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12522 states, 12521 states have (on average 2.9471288235763917) internal successors, (36901), 12521 states have internal predecessors, (36901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:43,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12522 states to 12522 states and 36901 transitions. [2021-06-05 06:53:43,213 INFO L78 Accepts]: Start accepts. Automaton has 12522 states and 36901 transitions. Word has length 37 [2021-06-05 06:53:43,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:43,213 INFO L482 AbstractCegarLoop]: Abstraction has 12522 states and 36901 transitions. [2021-06-05 06:53:43,213 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 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 06:53:43,213 INFO L276 IsEmpty]: Start isEmpty. Operand 12522 states and 36901 transitions. [2021-06-05 06:53:43,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 06:53:43,228 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:43,228 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:43,429 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:53:43,429 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:43,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:43,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1606664162, now seen corresponding path program 72 times [2021-06-05 06:53:43,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:43,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069349717] [2021-06-05 06:53:43,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:43,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:43,465 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:43,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:43,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069349717] [2021-06-05 06:53:43,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069349717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:43,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461444378] [2021-06-05 06:53:43,466 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 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 06:53:43,500 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:53:43,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:53:43,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:53:43,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:43,582 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:43,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461444378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:43,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:43,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 06:53:43,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161718342] [2021-06-05 06:53:43,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:53:43,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:43,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:53:43,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:53:43,583 INFO L87 Difference]: Start difference. First operand 12522 states and 36901 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 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 06:53:43,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:43,922 INFO L93 Difference]: Finished difference Result 21217 states and 61477 transitions. [2021-06-05 06:53:43,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 06:53:43,922 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 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 37 [2021-06-05 06:53:43,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:43,951 INFO L225 Difference]: With dead ends: 21217 [2021-06-05 06:53:43,952 INFO L226 Difference]: Without dead ends: 21161 [2021-06-05 06:53:43,952 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 213.2ms TimeCoverageRelationStatistics Valid=274, Invalid=782, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 06:53:43,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21161 states. [2021-06-05 06:53:44,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21161 to 13076. [2021-06-05 06:53:44,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13076 states, 13075 states have (on average 2.944244741873805) internal successors, (38496), 13075 states have internal predecessors, (38496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:44,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13076 states to 13076 states and 38496 transitions. [2021-06-05 06:53:44,254 INFO L78 Accepts]: Start accepts. Automaton has 13076 states and 38496 transitions. Word has length 37 [2021-06-05 06:53:44,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:44,254 INFO L482 AbstractCegarLoop]: Abstraction has 13076 states and 38496 transitions. [2021-06-05 06:53:44,254 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 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 06:53:44,254 INFO L276 IsEmpty]: Start isEmpty. Operand 13076 states and 38496 transitions. [2021-06-05 06:53:44,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 06:53:44,271 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:44,271 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:44,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-06-05 06:53:44,471 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:44,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:44,472 INFO L82 PathProgramCache]: Analyzing trace with hash -1048265624, now seen corresponding path program 73 times [2021-06-05 06:53:44,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:44,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151179787] [2021-06-05 06:53:44,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:44,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:44,507 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:44,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:44,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151179787] [2021-06-05 06:53:44,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151179787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:44,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915455416] [2021-06-05 06:53:44,507 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 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 06:53:44,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:44,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:53:44,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:44,633 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:44,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915455416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:44,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:44,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 06:53:44,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998430256] [2021-06-05 06:53:44,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:53:44,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:44,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:53:44,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:53:44,635 INFO L87 Difference]: Start difference. First operand 13076 states and 38496 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 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 06:53:44,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:44,930 INFO L93 Difference]: Finished difference Result 19540 states and 56766 transitions. [2021-06-05 06:53:44,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 06:53:44,930 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 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 37 [2021-06-05 06:53:44,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:44,965 INFO L225 Difference]: With dead ends: 19540 [2021-06-05 06:53:44,966 INFO L226 Difference]: Without dead ends: 19491 [2021-06-05 06:53:44,966 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 198.1ms TimeCoverageRelationStatistics Valid=202, Invalid=554, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:53:44,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19491 states. [2021-06-05 06:53:45,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19491 to 13090. [2021-06-05 06:53:45,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13090 states, 13089 states have (on average 2.9416303766521508) internal successors, (38503), 13089 states have internal predecessors, (38503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:45,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13090 states to 13090 states and 38503 transitions. [2021-06-05 06:53:45,259 INFO L78 Accepts]: Start accepts. Automaton has 13090 states and 38503 transitions. Word has length 37 [2021-06-05 06:53:45,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:45,260 INFO L482 AbstractCegarLoop]: Abstraction has 13090 states and 38503 transitions. [2021-06-05 06:53:45,260 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 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 06:53:45,260 INFO L276 IsEmpty]: Start isEmpty. Operand 13090 states and 38503 transitions. [2021-06-05 06:53:45,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 06:53:45,275 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:45,275 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:45,475 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable119 [2021-06-05 06:53:45,476 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:45,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:45,476 INFO L82 PathProgramCache]: Analyzing trace with hash -272513428, now seen corresponding path program 74 times [2021-06-05 06:53:45,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:45,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424443424] [2021-06-05 06:53:45,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:45,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:45,523 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:45,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:45,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424443424] [2021-06-05 06:53:45,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424443424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:45,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616101314] [2021-06-05 06:53:45,524 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 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 06:53:45,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:53:45,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:53:45,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:53:45,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:45,648 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:45,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616101314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:45,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:45,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 06:53:45,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952188010] [2021-06-05 06:53:45,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 06:53:45,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:45,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 06:53:45,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:53:45,649 INFO L87 Difference]: Start difference. First operand 13090 states and 38503 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 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 06:53:46,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:46,076 INFO L93 Difference]: Finished difference Result 18207 states and 52420 transitions. [2021-06-05 06:53:46,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 06:53:46,077 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 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 37 [2021-06-05 06:53:46,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:46,102 INFO L225 Difference]: With dead ends: 18207 [2021-06-05 06:53:46,103 INFO L226 Difference]: Without dead ends: 18147 [2021-06-05 06:53:46,103 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 277.2ms TimeCoverageRelationStatistics Valid=475, Invalid=1007, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 06:53:46,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18147 states. [2021-06-05 06:53:46,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18147 to 13262. [2021-06-05 06:53:46,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13262 states, 13261 states have (on average 2.932584269662921) internal successors, (38889), 13261 states have internal predecessors, (38889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:46,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13262 states to 13262 states and 38889 transitions. [2021-06-05 06:53:46,420 INFO L78 Accepts]: Start accepts. Automaton has 13262 states and 38889 transitions. Word has length 37 [2021-06-05 06:53:46,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:46,421 INFO L482 AbstractCegarLoop]: Abstraction has 13262 states and 38889 transitions. [2021-06-05 06:53:46,421 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 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 06:53:46,421 INFO L276 IsEmpty]: Start isEmpty. Operand 13262 states and 38889 transitions. [2021-06-05 06:53:46,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 06:53:46,439 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:46,439 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:46,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:53:46,640 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:46,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:46,640 INFO L82 PathProgramCache]: Analyzing trace with hash 144146212, now seen corresponding path program 75 times [2021-06-05 06:53:46,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:46,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664316994] [2021-06-05 06:53:46,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:46,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:46,671 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:46,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:46,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664316994] [2021-06-05 06:53:46,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664316994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:46,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332877167] [2021-06-05 06:53:46,672 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 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 06:53:46,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 06:53:46,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:53:46,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:53:46,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:46,800 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:46,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332877167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:46,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:46,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 06:53:46,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410809828] [2021-06-05 06:53:46,801 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:53:46,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:46,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:53:46,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:53:46,801 INFO L87 Difference]: Start difference. First operand 13262 states and 38889 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 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 06:53:47,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:47,295 INFO L93 Difference]: Finished difference Result 18702 states and 53466 transitions. [2021-06-05 06:53:47,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 06:53:47,295 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 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 37 [2021-06-05 06:53:47,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:47,321 INFO L225 Difference]: With dead ends: 18702 [2021-06-05 06:53:47,322 INFO L226 Difference]: Without dead ends: 18695 [2021-06-05 06:53:47,322 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 316.5ms TimeCoverageRelationStatistics Valid=603, Invalid=1119, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 06:53:47,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18695 states. [2021-06-05 06:53:47,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18695 to 13690. [2021-06-05 06:53:47,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13690 states, 13689 states have (on average 2.9304551099422893) internal successors, (40115), 13689 states have internal predecessors, (40115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:47,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13690 states to 13690 states and 40115 transitions. [2021-06-05 06:53:47,551 INFO L78 Accepts]: Start accepts. Automaton has 13690 states and 40115 transitions. Word has length 37 [2021-06-05 06:53:47,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:47,551 INFO L482 AbstractCegarLoop]: Abstraction has 13690 states and 40115 transitions. [2021-06-05 06:53:47,551 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 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 06:53:47,551 INFO L276 IsEmpty]: Start isEmpty. Operand 13690 states and 40115 transitions. [2021-06-05 06:53:47,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 06:53:47,568 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:47,568 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:47,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:53:47,768 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:47,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:47,769 INFO L82 PathProgramCache]: Analyzing trace with hash -198586448, now seen corresponding path program 76 times [2021-06-05 06:53:47,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:47,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806099303] [2021-06-05 06:53:47,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:47,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:47,806 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:47,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:47,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806099303] [2021-06-05 06:53:47,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806099303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:47,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372356840] [2021-06-05 06:53:47,806 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 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 06:53:47,840 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:53:47,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:53:47,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:53:47,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:47,950 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:47,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372356840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:47,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:47,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 06:53:47,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665257696] [2021-06-05 06:53:47,951 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:53:47,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:47,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:53:47,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:53:47,952 INFO L87 Difference]: Start difference. First operand 13690 states and 40115 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:48,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:48,404 INFO L93 Difference]: Finished difference Result 19896 states and 57093 transitions. [2021-06-05 06:53:48,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 06:53:48,404 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 06:53:48,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:48,432 INFO L225 Difference]: With dead ends: 19896 [2021-06-05 06:53:48,432 INFO L226 Difference]: Without dead ends: 19782 [2021-06-05 06:53:48,432 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 333.4ms TimeCoverageRelationStatistics Valid=512, Invalid=1210, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 06:53:48,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19782 states. [2021-06-05 06:53:48,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19782 to 15598. [2021-06-05 06:53:48,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15598 states, 15597 states have (on average 2.9260114124511123) internal successors, (45637), 15597 states have internal predecessors, (45637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:48,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15598 states to 15598 states and 45637 transitions. [2021-06-05 06:53:48,750 INFO L78 Accepts]: Start accepts. Automaton has 15598 states and 45637 transitions. Word has length 37 [2021-06-05 06:53:48,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:48,750 INFO L482 AbstractCegarLoop]: Abstraction has 15598 states and 45637 transitions. [2021-06-05 06:53:48,751 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:48,751 INFO L276 IsEmpty]: Start isEmpty. Operand 15598 states and 45637 transitions. [2021-06-05 06:53:48,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 06:53:48,769 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:48,769 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:48,969 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-06-05 06:53:48,969 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:48,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:48,969 INFO L82 PathProgramCache]: Analyzing trace with hash 52875454, now seen corresponding path program 77 times [2021-06-05 06:53:48,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:48,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822887982] [2021-06-05 06:53:48,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:48,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:49,008 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:49,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:49,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822887982] [2021-06-05 06:53:49,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822887982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:49,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530473714] [2021-06-05 06:53:49,008 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 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 06:53:49,035 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 06:53:49,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:53:49,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:53:49,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:49,131 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:49,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530473714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:49,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:49,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 13 [2021-06-05 06:53:49,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618506219] [2021-06-05 06:53:49,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:53:49,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:49,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:53:49,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:53:49,132 INFO L87 Difference]: Start difference. First operand 15598 states and 45637 transitions. Second operand has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 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 06:53:49,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:49,623 INFO L93 Difference]: Finished difference Result 23975 states and 68834 transitions. [2021-06-05 06:53:49,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 06:53:49,624 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 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 37 [2021-06-05 06:53:49,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:49,657 INFO L225 Difference]: With dead ends: 23975 [2021-06-05 06:53:49,657 INFO L226 Difference]: Without dead ends: 23968 [2021-06-05 06:53:49,658 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 326.7ms TimeCoverageRelationStatistics Valid=546, Invalid=1014, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 06:53:49,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23968 states. [2021-06-05 06:53:49,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23968 to 19902. [2021-06-05 06:53:49,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19902 states, 19901 states have (on average 2.9230189437716696) internal successors, (58171), 19901 states have internal predecessors, (58171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:50,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19902 states to 19902 states and 58171 transitions. [2021-06-05 06:53:50,024 INFO L78 Accepts]: Start accepts. Automaton has 19902 states and 58171 transitions. Word has length 37 [2021-06-05 06:53:50,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:50,024 INFO L482 AbstractCegarLoop]: Abstraction has 19902 states and 58171 transitions. [2021-06-05 06:53:50,024 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 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 06:53:50,025 INFO L276 IsEmpty]: Start isEmpty. Operand 19902 states and 58171 transitions. [2021-06-05 06:53:50,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 06:53:50,047 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:50,047 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:50,259 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-06-05 06:53:50,259 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:50,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:50,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1380437010, now seen corresponding path program 78 times [2021-06-05 06:53:50,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:50,259 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115736353] [2021-06-05 06:53:50,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:50,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:50,290 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:50,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:50,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115736353] [2021-06-05 06:53:50,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115736353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:50,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750832000] [2021-06-05 06:53:50,291 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 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 06:53:50,332 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:53:50,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:53:50,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:53:50,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:50,403 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:50,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750832000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:50,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:50,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 06:53:50,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412209036] [2021-06-05 06:53:50,404 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 06:53:50,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:50,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 06:53:50,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:53:50,404 INFO L87 Difference]: Start difference. First operand 19902 states and 58171 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 06:53:50,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:50,612 INFO L93 Difference]: Finished difference Result 22936 states and 66683 transitions. [2021-06-05 06:53:50,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 06:53:50,612 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 37 [2021-06-05 06:53:50,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:50,645 INFO L225 Difference]: With dead ends: 22936 [2021-06-05 06:53:50,645 INFO L226 Difference]: Without dead ends: 22936 [2021-06-05 06:53:50,645 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 96.2ms TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:53:50,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22936 states. [2021-06-05 06:53:50,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22936 to 20168. [2021-06-05 06:53:50,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20168 states, 20167 states have (on average 2.9221004611494026) internal successors, (58930), 20167 states have internal predecessors, (58930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:50,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20168 states to 20168 states and 58930 transitions. [2021-06-05 06:53:50,951 INFO L78 Accepts]: Start accepts. Automaton has 20168 states and 58930 transitions. Word has length 37 [2021-06-05 06:53:50,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:50,951 INFO L482 AbstractCegarLoop]: Abstraction has 20168 states and 58930 transitions. [2021-06-05 06:53:50,951 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 06:53:50,951 INFO L276 IsEmpty]: Start isEmpty. Operand 20168 states and 58930 transitions. [2021-06-05 06:53:50,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 06:53:50,974 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:50,974 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:51,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-06-05 06:53:51,189 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:51,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:51,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1382409982, now seen corresponding path program 79 times [2021-06-05 06:53:51,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:51,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589497736] [2021-06-05 06:53:51,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:51,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:51,220 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:51,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:51,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589497736] [2021-06-05 06:53:51,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589497736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:51,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120801908] [2021-06-05 06:53:51,220 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 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 06:53:51,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:51,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:53:51,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:51,310 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:51,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120801908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:51,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:51,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 06:53:51,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265903040] [2021-06-05 06:53:51,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 06:53:51,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:51,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 06:53:51,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:53:51,311 INFO L87 Difference]: Start difference. First operand 20168 states and 58930 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 06:53:51,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:51,528 INFO L93 Difference]: Finished difference Result 24551 states and 71034 transitions. [2021-06-05 06:53:51,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 06:53:51,528 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 37 [2021-06-05 06:53:51,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:51,559 INFO L225 Difference]: With dead ends: 24551 [2021-06-05 06:53:51,559 INFO L226 Difference]: Without dead ends: 24497 [2021-06-05 06:53:51,560 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 94.1ms TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:53:51,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24497 states. [2021-06-05 06:53:51,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24497 to 20168. [2021-06-05 06:53:51,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20168 states, 20167 states have (on average 2.9216046015768335) internal successors, (58920), 20167 states have internal predecessors, (58920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:51,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20168 states to 20168 states and 58920 transitions. [2021-06-05 06:53:51,858 INFO L78 Accepts]: Start accepts. Automaton has 20168 states and 58920 transitions. Word has length 37 [2021-06-05 06:53:51,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:51,858 INFO L482 AbstractCegarLoop]: Abstraction has 20168 states and 58920 transitions. [2021-06-05 06:53:51,858 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 06:53:51,858 INFO L276 IsEmpty]: Start isEmpty. Operand 20168 states and 58920 transitions. [2021-06-05 06:53:51,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 06:53:51,883 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:51,883 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:52,083 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-06-05 06:53:52,083 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:52,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:52,083 INFO L82 PathProgramCache]: Analyzing trace with hash 1341647984, now seen corresponding path program 80 times [2021-06-05 06:53:52,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:52,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228431132] [2021-06-05 06:53:52,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:52,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:52,123 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:52,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:52,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228431132] [2021-06-05 06:53:52,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228431132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:52,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039145723] [2021-06-05 06:53:52,124 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 06:53:52,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:53:52,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:53:52,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:53:52,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:52,222 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:52,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039145723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:52,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:52,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 06:53:52,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42558398] [2021-06-05 06:53:52,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:53:52,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:52,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:53:52,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:53:52,223 INFO L87 Difference]: Start difference. First operand 20168 states and 58920 transitions. Second operand has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 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 06:53:52,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:52,483 INFO L93 Difference]: Finished difference Result 22851 states and 66117 transitions. [2021-06-05 06:53:52,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 06:53:52,483 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 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 37 [2021-06-05 06:53:52,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:52,517 INFO L225 Difference]: With dead ends: 22851 [2021-06-05 06:53:52,518 INFO L226 Difference]: Without dead ends: 22851 [2021-06-05 06:53:52,518 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 134.3ms TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:53:52,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22851 states. [2021-06-05 06:53:52,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22851 to 20512. [2021-06-05 06:53:52,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20512 states, 20511 states have (on average 2.9201891667885524) internal successors, (59896), 20511 states have internal predecessors, (59896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:52,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20512 states to 20512 states and 59896 transitions. [2021-06-05 06:53:52,850 INFO L78 Accepts]: Start accepts. Automaton has 20512 states and 59896 transitions. Word has length 37 [2021-06-05 06:53:52,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:52,850 INFO L482 AbstractCegarLoop]: Abstraction has 20512 states and 59896 transitions. [2021-06-05 06:53:52,850 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 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 06:53:52,850 INFO L276 IsEmpty]: Start isEmpty. Operand 20512 states and 59896 transitions. [2021-06-05 06:53:52,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 06:53:52,877 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:52,877 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:53,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-06-05 06:53:53,077 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:53,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:53,078 INFO L82 PathProgramCache]: Analyzing trace with hash -461813350, now seen corresponding path program 81 times [2021-06-05 06:53:53,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:53,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800578702] [2021-06-05 06:53:53,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:53,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:53,109 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:53,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:53,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800578702] [2021-06-05 06:53:53,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800578702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:53,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750950927] [2021-06-05 06:53:53,110 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 06:53:53,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:53:53,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:53:53,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:53:53,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:53,223 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:53,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750950927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:53,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:53,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 06:53:53,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480795579] [2021-06-05 06:53:53,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:53:53,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:53,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:53:53,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:53:53,224 INFO L87 Difference]: Start difference. First operand 20512 states and 59896 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 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 06:53:53,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:53,528 INFO L93 Difference]: Finished difference Result 25378 states and 73051 transitions. [2021-06-05 06:53:53,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 06:53:53,528 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 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 37 [2021-06-05 06:53:53,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:53,566 INFO L225 Difference]: With dead ends: 25378 [2021-06-05 06:53:53,566 INFO L226 Difference]: Without dead ends: 25336 [2021-06-05 06:53:53,566 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 197.3ms TimeCoverageRelationStatistics Valid=235, Invalid=635, Unknown=0, NotChecked=0, Total=870 [2021-06-05 06:53:53,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25336 states. [2021-06-05 06:53:53,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25336 to 21132. [2021-06-05 06:53:53,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21132 states, 21131 states have (on average 2.924707775306422) internal successors, (61802), 21131 states have internal predecessors, (61802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:53,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21132 states to 21132 states and 61802 transitions. [2021-06-05 06:53:53,995 INFO L78 Accepts]: Start accepts. Automaton has 21132 states and 61802 transitions. Word has length 37 [2021-06-05 06:53:53,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:53,996 INFO L482 AbstractCegarLoop]: Abstraction has 21132 states and 61802 transitions. [2021-06-05 06:53:53,996 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 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 06:53:53,996 INFO L276 IsEmpty]: Start isEmpty. Operand 21132 states and 61802 transitions. [2021-06-05 06:53:54,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 06:53:54,022 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:54,022 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:54,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:53:54,224 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:54,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:54,224 INFO L82 PathProgramCache]: Analyzing trace with hash -664281518, now seen corresponding path program 82 times [2021-06-05 06:53:54,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:54,224 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478959543] [2021-06-05 06:53:54,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:54,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:54,254 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:54,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:54,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478959543] [2021-06-05 06:53:54,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478959543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:54,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975523437] [2021-06-05 06:53:54,255 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 06:53:54,281 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:53:54,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:53:54,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:53:54,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:54,366 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:54,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975523437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:54,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:54,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 06:53:54,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099413485] [2021-06-05 06:53:54,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:53:54,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:54,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:53:54,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:53:54,366 INFO L87 Difference]: Start difference. First operand 21132 states and 61802 transitions. Second operand has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 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 06:53:54,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:54,841 INFO L93 Difference]: Finished difference Result 26806 states and 77177 transitions. [2021-06-05 06:53:54,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 06:53:54,842 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 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 37 [2021-06-05 06:53:54,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:54,898 INFO L225 Difference]: With dead ends: 26806 [2021-06-05 06:53:54,898 INFO L226 Difference]: Without dead ends: 26806 [2021-06-05 06:53:54,898 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 254.7ms TimeCoverageRelationStatistics Valid=425, Invalid=907, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 06:53:54,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26806 states. [2021-06-05 06:53:55,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26806 to 22606. [2021-06-05 06:53:55,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22606 states, 22605 states have (on average 2.92081397920814) internal successors, (66025), 22605 states have internal predecessors, (66025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:55,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22606 states to 22606 states and 66025 transitions. [2021-06-05 06:53:55,276 INFO L78 Accepts]: Start accepts. Automaton has 22606 states and 66025 transitions. Word has length 37 [2021-06-05 06:53:55,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:55,276 INFO L482 AbstractCegarLoop]: Abstraction has 22606 states and 66025 transitions. [2021-06-05 06:53:55,276 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 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 06:53:55,277 INFO L276 IsEmpty]: Start isEmpty. Operand 22606 states and 66025 transitions. [2021-06-05 06:53:55,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 06:53:55,302 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:55,302 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:55,502 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-06-05 06:53:55,502 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:55,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:55,503 INFO L82 PathProgramCache]: Analyzing trace with hash 1702207848, now seen corresponding path program 83 times [2021-06-05 06:53:55,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:55,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563212317] [2021-06-05 06:53:55,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:55,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:55,534 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:55,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:55,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563212317] [2021-06-05 06:53:55,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563212317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:55,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690292768] [2021-06-05 06:53:55,534 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 06:53:55,559 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:53:55,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:53:55,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:53:55,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:55,635 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:55,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690292768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:55,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:55,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 06:53:55,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728304516] [2021-06-05 06:53:55,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:53:55,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:55,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:53:55,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:53:55,636 INFO L87 Difference]: Start difference. First operand 22606 states and 66025 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 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 06:53:56,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:56,053 INFO L93 Difference]: Finished difference Result 29720 states and 85805 transitions. [2021-06-05 06:53:56,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 06:53:56,053 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 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 37 [2021-06-05 06:53:56,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:56,106 INFO L225 Difference]: With dead ends: 29720 [2021-06-05 06:53:56,106 INFO L226 Difference]: Without dead ends: 29672 [2021-06-05 06:53:56,106 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 232.6ms TimeCoverageRelationStatistics Valid=293, Invalid=829, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 06:53:56,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29672 states. [2021-06-05 06:53:56,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29672 to 25600. [2021-06-05 06:53:56,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25600 states, 25599 states have (on average 2.913160670338685) internal successors, (74574), 25599 states have internal predecessors, (74574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:56,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25600 states to 25600 states and 74574 transitions. [2021-06-05 06:53:56,613 INFO L78 Accepts]: Start accepts. Automaton has 25600 states and 74574 transitions. Word has length 37 [2021-06-05 06:53:56,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:56,613 INFO L482 AbstractCegarLoop]: Abstraction has 25600 states and 74574 transitions. [2021-06-05 06:53:56,613 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 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 06:53:56,613 INFO L276 IsEmpty]: Start isEmpty. Operand 25600 states and 74574 transitions. [2021-06-05 06:53:56,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 06:53:56,640 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:56,640 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:56,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-06-05 06:53:56,841 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:56,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:56,841 INFO L82 PathProgramCache]: Analyzing trace with hash 369493936, now seen corresponding path program 84 times [2021-06-05 06:53:56,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:56,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768479420] [2021-06-05 06:53:56,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:56,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:56,876 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:56,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:56,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768479420] [2021-06-05 06:53:56,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768479420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:56,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824984888] [2021-06-05 06:53:56,877 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 06:53:56,902 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:53:56,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:53:56,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:53:56,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:56,976 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:56,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824984888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:56,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:56,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 06:53:56,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166552088] [2021-06-05 06:53:56,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:53:56,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:56,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:53:56,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:53:56,977 INFO L87 Difference]: Start difference. First operand 25600 states and 74574 transitions. Second operand has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 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 06:53:57,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:57,498 INFO L93 Difference]: Finished difference Result 31521 states and 90635 transitions. [2021-06-05 06:53:57,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 06:53:57,499 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 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 37 [2021-06-05 06:53:57,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:57,549 INFO L225 Difference]: With dead ends: 31521 [2021-06-05 06:53:57,549 INFO L226 Difference]: Without dead ends: 31521 [2021-06-05 06:53:57,550 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 290.9ms TimeCoverageRelationStatistics Valid=568, Invalid=1072, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 06:53:57,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31521 states. [2021-06-05 06:53:57,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31521 to 27384. [2021-06-05 06:53:57,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27384 states, 27383 states have (on average 2.9259759704926416) internal successors, (80122), 27383 states have internal predecessors, (80122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:58,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27384 states to 27384 states and 80122 transitions. [2021-06-05 06:53:58,023 INFO L78 Accepts]: Start accepts. Automaton has 27384 states and 80122 transitions. Word has length 37 [2021-06-05 06:53:58,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:58,023 INFO L482 AbstractCegarLoop]: Abstraction has 27384 states and 80122 transitions. [2021-06-05 06:53:58,023 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 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 06:53:58,023 INFO L276 IsEmpty]: Start isEmpty. Operand 27384 states and 80122 transitions. [2021-06-05 06:53:58,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 06:53:58,061 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:58,061 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:58,261 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:53:58,261 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:58,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:58,262 INFO L82 PathProgramCache]: Analyzing trace with hash 158796890, now seen corresponding path program 85 times [2021-06-05 06:53:58,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:58,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466513424] [2021-06-05 06:53:58,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:58,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:58,311 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:58,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:58,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466513424] [2021-06-05 06:53:58,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466513424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:58,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117745301] [2021-06-05 06:53:58,312 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 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 06:53:58,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:58,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:53:58,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:58,425 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:58,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117745301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:58,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:58,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 06:53:58,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680178506] [2021-06-05 06:53:58,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:53:58,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:58,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:53:58,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:53:58,426 INFO L87 Difference]: Start difference. First operand 27384 states and 80122 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 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 06:53:58,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:58,847 INFO L93 Difference]: Finished difference Result 33285 states and 96447 transitions. [2021-06-05 06:53:58,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 06:53:58,848 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 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 37 [2021-06-05 06:53:58,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:58,901 INFO L225 Difference]: With dead ends: 33285 [2021-06-05 06:53:58,902 INFO L226 Difference]: Without dead ends: 33267 [2021-06-05 06:53:58,902 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 231.9ms TimeCoverageRelationStatistics Valid=303, Invalid=819, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 06:53:58,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33267 states. [2021-06-05 06:53:59,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33267 to 27954. [2021-06-05 06:53:59,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27954 states, 27953 states have (on average 2.9269488069259113) internal successors, (81817), 27953 states have internal predecessors, (81817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:59,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27954 states to 27954 states and 81817 transitions. [2021-06-05 06:53:59,548 INFO L78 Accepts]: Start accepts. Automaton has 27954 states and 81817 transitions. Word has length 37 [2021-06-05 06:53:59,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:59,548 INFO L482 AbstractCegarLoop]: Abstraction has 27954 states and 81817 transitions. [2021-06-05 06:53:59,548 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 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 06:53:59,548 INFO L276 IsEmpty]: Start isEmpty. Operand 27954 states and 81817 transitions. [2021-06-05 06:53:59,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 06:53:59,584 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:59,584 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:59,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:53:59,784 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:59,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:59,785 INFO L82 PathProgramCache]: Analyzing trace with hash 887548708, now seen corresponding path program 86 times [2021-06-05 06:53:59,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:59,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61902717] [2021-06-05 06:53:59,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:59,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:59,820 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:59,820 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:59,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61902717] [2021-06-05 06:53:59,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61902717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:59,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175311552] [2021-06-05 06:53:59,820 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 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 06:53:59,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:53:59,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:53:59,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:53:59,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:59,937 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:59,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175311552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:59,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:59,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 06:53:59,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034975495] [2021-06-05 06:53:59,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:53:59,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:59,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:53:59,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:53:59,938 INFO L87 Difference]: Start difference. First operand 27954 states and 81817 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 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 06:54:00,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:54:00,501 INFO L93 Difference]: Finished difference Result 32376 states and 93008 transitions. [2021-06-05 06:54:00,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 06:54:00,502 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 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 37 [2021-06-05 06:54:00,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:54:00,550 INFO L225 Difference]: With dead ends: 32376 [2021-06-05 06:54:00,550 INFO L226 Difference]: Without dead ends: 32369 [2021-06-05 06:54:00,551 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 365.2ms TimeCoverageRelationStatistics Valid=578, Invalid=1314, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 06:54:00,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32369 states. [2021-06-05 06:54:00,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32369 to 27014. [2021-06-05 06:54:00,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27014 states, 27013 states have (on average 2.914559656461704) internal successors, (78731), 27013 states have internal predecessors, (78731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:01,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27014 states to 27014 states and 78731 transitions. [2021-06-05 06:54:01,007 INFO L78 Accepts]: Start accepts. Automaton has 27014 states and 78731 transitions. Word has length 37 [2021-06-05 06:54:01,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:54:01,007 INFO L482 AbstractCegarLoop]: Abstraction has 27014 states and 78731 transitions. [2021-06-05 06:54:01,007 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 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 06:54:01,007 INFO L276 IsEmpty]: Start isEmpty. Operand 27014 states and 78731 transitions. [2021-06-05 06:54:01,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 06:54:01,043 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:54:01,043 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:54:01,243 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:54:01,243 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:54:01,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:54:01,244 INFO L82 PathProgramCache]: Analyzing trace with hash 510577554, now seen corresponding path program 87 times [2021-06-05 06:54:01,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:54:01,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273319811] [2021-06-05 06:54:01,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:54:01,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:54:01,281 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:01,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:54:01,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273319811] [2021-06-05 06:54:01,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273319811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:01,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149794812] [2021-06-05 06:54:01,282 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 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 06:54:01,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 06:54:01,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:54:01,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:54:01,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:54:01,390 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:01,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149794812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:01,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:54:01,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 06:54:01,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76466551] [2021-06-05 06:54:01,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:54:01,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:54:01,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:54:01,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:54:01,391 INFO L87 Difference]: Start difference. First operand 27014 states and 78731 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 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 06:54:01,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:54:01,764 INFO L93 Difference]: Finished difference Result 29628 states and 85439 transitions. [2021-06-05 06:54:01,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 06:54:01,765 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 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 37 [2021-06-05 06:54:01,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:54:01,809 INFO L225 Difference]: With dead ends: 29628 [2021-06-05 06:54:01,809 INFO L226 Difference]: Without dead ends: 29614 [2021-06-05 06:54:01,810 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 200.6ms TimeCoverageRelationStatistics Valid=367, Invalid=689, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 06:54:01,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29614 states. [2021-06-05 06:54:02,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29614 to 23956. [2021-06-05 06:54:02,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23956 states, 23955 states have (on average 2.914631600918389) internal successors, (69820), 23955 states have internal predecessors, (69820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:02,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23956 states to 23956 states and 69820 transitions. [2021-06-05 06:54:02,286 INFO L78 Accepts]: Start accepts. Automaton has 23956 states and 69820 transitions. Word has length 37 [2021-06-05 06:54:02,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:54:02,286 INFO L482 AbstractCegarLoop]: Abstraction has 23956 states and 69820 transitions. [2021-06-05 06:54:02,287 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 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 06:54:02,287 INFO L276 IsEmpty]: Start isEmpty. Operand 23956 states and 69820 transitions. [2021-06-05 06:54:02,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 06:54:02,311 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:54:02,311 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:54:02,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-06-05 06:54:02,512 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:54:02,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:54:02,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1704477878, now seen corresponding path program 88 times [2021-06-05 06:54:02,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:54:02,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711793314] [2021-06-05 06:54:02,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:54:02,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:54:02,547 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:02,547 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:54:02,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711793314] [2021-06-05 06:54:02,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711793314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:02,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461200702] [2021-06-05 06:54:02,547 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 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 06:54:02,589 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:54:02,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:54:02,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:54:02,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:54:02,684 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:02,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461200702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:02,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:54:02,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 06:54:02,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332203353] [2021-06-05 06:54:02,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 06:54:02,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:54:02,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 06:54:02,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:54:02,685 INFO L87 Difference]: Start difference. First operand 23956 states and 69820 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:03,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:54:03,120 INFO L93 Difference]: Finished difference Result 28263 states and 81286 transitions. [2021-06-05 06:54:03,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 06:54:03,120 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 06:54:03,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:54:03,163 INFO L225 Difference]: With dead ends: 28263 [2021-06-05 06:54:03,163 INFO L226 Difference]: Without dead ends: 28251 [2021-06-05 06:54:03,163 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 250.6ms TimeCoverageRelationStatistics Valid=340, Invalid=782, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 06:54:03,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28251 states. [2021-06-05 06:54:03,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28251 to 24282. [2021-06-05 06:54:03,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24282 states, 24281 states have (on average 2.9153247395082573) internal successors, (70787), 24281 states have internal predecessors, (70787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:03,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24282 states to 24282 states and 70787 transitions. [2021-06-05 06:54:03,537 INFO L78 Accepts]: Start accepts. Automaton has 24282 states and 70787 transitions. Word has length 37 [2021-06-05 06:54:03,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:54:03,537 INFO L482 AbstractCegarLoop]: Abstraction has 24282 states and 70787 transitions. [2021-06-05 06:54:03,537 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:03,537 INFO L276 IsEmpty]: Start isEmpty. Operand 24282 states and 70787 transitions. [2021-06-05 06:54:03,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 06:54:03,564 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:54:03,564 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:54:03,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-06-05 06:54:03,765 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:54:03,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:54:03,765 INFO L82 PathProgramCache]: Analyzing trace with hash 606853100, now seen corresponding path program 89 times [2021-06-05 06:54:03,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:54:03,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739151931] [2021-06-05 06:54:03,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:54:03,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:54:03,809 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:03,809 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:54:03,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739151931] [2021-06-05 06:54:03,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739151931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:03,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274527809] [2021-06-05 06:54:03,809 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 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 06:54:03,833 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:54:03,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:54:03,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:54:03,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:54:03,913 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:03,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274527809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:03,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:54:03,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 06:54:03,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485387133] [2021-06-05 06:54:03,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:54:03,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:54:03,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:54:03,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:54:03,914 INFO L87 Difference]: Start difference. First operand 24282 states and 70787 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:04,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:54:04,348 INFO L93 Difference]: Finished difference Result 30400 states and 87330 transitions. [2021-06-05 06:54:04,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 06:54:04,349 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 06:54:04,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:54:04,395 INFO L225 Difference]: With dead ends: 30400 [2021-06-05 06:54:04,395 INFO L226 Difference]: Without dead ends: 30394 [2021-06-05 06:54:04,396 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 263.4ms TimeCoverageRelationStatistics Valid=390, Invalid=800, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 06:54:04,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30394 states. [2021-06-05 06:54:04,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30394 to 24292. [2021-06-05 06:54:04,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24292 states, 24291 states have (on average 2.915647770779301) internal successors, (70824), 24291 states have internal predecessors, (70824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:04,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24292 states to 24292 states and 70824 transitions. [2021-06-05 06:54:04,782 INFO L78 Accepts]: Start accepts. Automaton has 24292 states and 70824 transitions. Word has length 37 [2021-06-05 06:54:04,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:54:04,782 INFO L482 AbstractCegarLoop]: Abstraction has 24292 states and 70824 transitions. [2021-06-05 06:54:04,782 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:04,782 INFO L276 IsEmpty]: Start isEmpty. Operand 24292 states and 70824 transitions. [2021-06-05 06:54:04,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 06:54:04,812 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:54:04,812 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:54:05,013 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-06-05 06:54:05,014 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:54:05,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:54:05,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1506148470, now seen corresponding path program 90 times [2021-06-05 06:54:05,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:54:05,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315945036] [2021-06-05 06:54:05,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:54:05,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:54:05,047 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:05,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:54:05,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315945036] [2021-06-05 06:54:05,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315945036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:05,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813333887] [2021-06-05 06:54:05,047 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:54:05,095 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 06:54:05,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:54:05,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:54:05,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:54:05,187 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:05,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813333887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:05,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:54:05,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 06:54:05,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052718867] [2021-06-05 06:54:05,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:54:05,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:54:05,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:54:05,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:54:05,187 INFO L87 Difference]: Start difference. First operand 24292 states and 70824 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:05,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:54:05,774 INFO L93 Difference]: Finished difference Result 31964 states and 91804 transitions. [2021-06-05 06:54:05,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 06:54:05,774 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 06:54:05,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:54:05,824 INFO L225 Difference]: With dead ends: 31964 [2021-06-05 06:54:05,824 INFO L226 Difference]: Without dead ends: 31964 [2021-06-05 06:54:05,824 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 404.0ms TimeCoverageRelationStatistics Valid=603, Invalid=1119, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 06:54:05,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31964 states. [2021-06-05 06:54:06,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31964 to 26278. [2021-06-05 06:54:06,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26278 states, 26277 states have (on average 2.919244967081478) internal successors, (76709), 26277 states have internal predecessors, (76709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:06,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26278 states to 26278 states and 76709 transitions. [2021-06-05 06:54:06,262 INFO L78 Accepts]: Start accepts. Automaton has 26278 states and 76709 transitions. Word has length 37 [2021-06-05 06:54:06,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:54:06,262 INFO L482 AbstractCegarLoop]: Abstraction has 26278 states and 76709 transitions. [2021-06-05 06:54:06,262 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:06,262 INFO L276 IsEmpty]: Start isEmpty. Operand 26278 states and 76709 transitions. [2021-06-05 06:54:06,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 06:54:06,297 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:54:06,297 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:54:06,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-06-05 06:54:06,497 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:54:06,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:54:06,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1647232088, now seen corresponding path program 91 times [2021-06-05 06:54:06,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:54:06,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865532512] [2021-06-05 06:54:06,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:54:06,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:54:06,522 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:54:06,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:54:06,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865532512] [2021-06-05 06:54:06,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865532512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:06,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054710579] [2021-06-05 06:54:06,522 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:54:06,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:54:06,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:54:06,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:54:06,626 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:06,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054710579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:06,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:54:06,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 06:54:06,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106064517] [2021-06-05 06:54:06,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:54:06,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:54:06,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:54:06,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:54:06,627 INFO L87 Difference]: Start difference. First operand 26278 states and 76709 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 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 06:54:07,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:54:07,080 INFO L93 Difference]: Finished difference Result 31151 states and 89602 transitions. [2021-06-05 06:54:07,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 06:54:07,080 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 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 37 [2021-06-05 06:54:07,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:54:07,130 INFO L225 Difference]: With dead ends: 31151 [2021-06-05 06:54:07,131 INFO L226 Difference]: Without dead ends: 31130 [2021-06-05 06:54:07,131 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 246.6ms TimeCoverageRelationStatistics Valid=430, Invalid=830, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 06:54:07,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31130 states. [2021-06-05 06:54:07,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31130 to 23206. [2021-06-05 06:54:07,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23206 states, 23205 states have (on average 2.908554190907132) internal successors, (67493), 23205 states have internal predecessors, (67493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:07,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23206 states to 23206 states and 67493 transitions. [2021-06-05 06:54:07,521 INFO L78 Accepts]: Start accepts. Automaton has 23206 states and 67493 transitions. Word has length 37 [2021-06-05 06:54:07,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:54:07,521 INFO L482 AbstractCegarLoop]: Abstraction has 23206 states and 67493 transitions. [2021-06-05 06:54:07,521 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 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 06:54:07,521 INFO L276 IsEmpty]: Start isEmpty. Operand 23206 states and 67493 transitions. [2021-06-05 06:54:07,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 06:54:07,546 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:54:07,546 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:54:07,746 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:54:07,746 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:54:07,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:54:07,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1731630862, now seen corresponding path program 92 times [2021-06-05 06:54:07,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:54:07,747 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889484538] [2021-06-05 06:54:07,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:54:07,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:54:07,787 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:07,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:54:07,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889484538] [2021-06-05 06:54:07,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889484538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:07,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769337018] [2021-06-05 06:54:07,787 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:54:07,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:54:07,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:54:07,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:54:07,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:54:07,902 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:07,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769337018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:07,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:54:07,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 06:54:07,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075755818] [2021-06-05 06:54:07,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 06:54:07,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:54:07,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 06:54:07,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:54:07,903 INFO L87 Difference]: Start difference. First operand 23206 states and 67493 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 06:54:08,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:54:08,274 INFO L93 Difference]: Finished difference Result 29544 states and 84782 transitions. [2021-06-05 06:54:08,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 06:54:08,275 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 37 [2021-06-05 06:54:08,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:54:08,319 INFO L225 Difference]: With dead ends: 29544 [2021-06-05 06:54:08,319 INFO L226 Difference]: Without dead ends: 29488 [2021-06-05 06:54:08,319 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 218.6ms TimeCoverageRelationStatistics Valid=373, Invalid=817, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 06:54:08,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29488 states. [2021-06-05 06:54:08,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29488 to 24042. [2021-06-05 06:54:08,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24042 states, 24041 states have (on average 2.9141466661120585) internal successors, (70059), 24041 states have internal predecessors, (70059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:08,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24042 states to 24042 states and 70059 transitions. [2021-06-05 06:54:08,770 INFO L78 Accepts]: Start accepts. Automaton has 24042 states and 70059 transitions. Word has length 37 [2021-06-05 06:54:08,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:54:08,770 INFO L482 AbstractCegarLoop]: Abstraction has 24042 states and 70059 transitions. [2021-06-05 06:54:08,770 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 06:54:08,770 INFO L276 IsEmpty]: Start isEmpty. Operand 24042 states and 70059 transitions. [2021-06-05 06:54:08,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 06:54:08,796 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:54:08,796 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:54:08,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-06-05 06:54:08,997 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:54:08,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:54:08,997 INFO L82 PathProgramCache]: Analyzing trace with hash -1163931468, now seen corresponding path program 93 times [2021-06-05 06:54:08,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:54:08,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621062727] [2021-06-05 06:54:08,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:54:08,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:54:09,036 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:09,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:54:09,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621062727] [2021-06-05 06:54:09,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621062727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:09,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798156024] [2021-06-05 06:54:09,036 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:54:09,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:54:09,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:54:09,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:54:09,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:54:09,155 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:09,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798156024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:09,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:54:09,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 06:54:09,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592059370] [2021-06-05 06:54:09,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:54:09,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:54:09,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:54:09,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:54:09,156 INFO L87 Difference]: Start difference. First operand 24042 states and 70059 transitions. Second operand has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 15 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 06:54:09,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:54:09,560 INFO L93 Difference]: Finished difference Result 30061 states and 86344 transitions. [2021-06-05 06:54:09,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 06:54:09,561 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 15 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 37 [2021-06-05 06:54:09,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:54:09,606 INFO L225 Difference]: With dead ends: 30061 [2021-06-05 06:54:09,606 INFO L226 Difference]: Without dead ends: 30049 [2021-06-05 06:54:09,606 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 257.0ms TimeCoverageRelationStatistics Valid=366, Invalid=894, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 06:54:09,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30049 states. [2021-06-05 06:54:09,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30049 to 25534. [2021-06-05 06:54:09,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25534 states, 25533 states have (on average 2.906708964868993) internal successors, (74217), 25533 states have internal predecessors, (74217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:10,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25534 states to 25534 states and 74217 transitions. [2021-06-05 06:54:10,009 INFO L78 Accepts]: Start accepts. Automaton has 25534 states and 74217 transitions. Word has length 37 [2021-06-05 06:54:10,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:54:10,009 INFO L482 AbstractCegarLoop]: Abstraction has 25534 states and 74217 transitions. [2021-06-05 06:54:10,009 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 15 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 06:54:10,009 INFO L276 IsEmpty]: Start isEmpty. Operand 25534 states and 74217 transitions. [2021-06-05 06:54:10,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 06:54:10,036 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:54:10,036 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:54:10,247 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-06-05 06:54:10,248 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:54:10,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:54:10,248 INFO L82 PathProgramCache]: Analyzing trace with hash 1502315474, now seen corresponding path program 94 times [2021-06-05 06:54:10,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:54:10,248 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340506872] [2021-06-05 06:54:10,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:54:10,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:54:10,275 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:10,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:54:10,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340506872] [2021-06-05 06:54:10,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340506872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:10,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76273659] [2021-06-05 06:54:10,276 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:54:10,300 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:54:10,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:54:10,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:54:10,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:54:10,395 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:10,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76273659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:10,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:54:10,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 06:54:10,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987878317] [2021-06-05 06:54:10,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 06:54:10,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:54:10,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 06:54:10,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:54:10,396 INFO L87 Difference]: Start difference. First operand 25534 states and 74217 transitions. Second operand has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 14 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 06:54:10,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:54:10,866 INFO L93 Difference]: Finished difference Result 36194 states and 103786 transitions. [2021-06-05 06:54:10,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 06:54:10,866 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 14 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 37 [2021-06-05 06:54:10,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:54:10,919 INFO L225 Difference]: With dead ends: 36194 [2021-06-05 06:54:10,919 INFO L226 Difference]: Without dead ends: 36188 [2021-06-05 06:54:10,920 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 289.3ms TimeCoverageRelationStatistics Valid=467, Invalid=1015, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 06:54:10,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36188 states. [2021-06-05 06:54:11,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36188 to 29604. [2021-06-05 06:54:11,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29604 states, 29603 states have (on average 2.912745329865216) internal successors, (86226), 29603 states have internal predecessors, (86226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:11,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29604 states to 29604 states and 86226 transitions. [2021-06-05 06:54:11,595 INFO L78 Accepts]: Start accepts. Automaton has 29604 states and 86226 transitions. Word has length 37 [2021-06-05 06:54:11,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:54:11,595 INFO L482 AbstractCegarLoop]: Abstraction has 29604 states and 86226 transitions. [2021-06-05 06:54:11,595 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 14 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 06:54:11,595 INFO L276 IsEmpty]: Start isEmpty. Operand 29604 states and 86226 transitions. [2021-06-05 06:54:11,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 06:54:11,632 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:54:11,632 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:54:11,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:54:11,833 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:54:11,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:54:11,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1313090188, now seen corresponding path program 95 times [2021-06-05 06:54:11,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:54:11,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972761727] [2021-06-05 06:54:11,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:54:11,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:54:11,856 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:11,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:54:11,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972761727] [2021-06-05 06:54:11,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972761727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:11,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993932643] [2021-06-05 06:54:11,857 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 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:54:11,882 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:54:11,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:54:11,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:54:11,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:54:11,986 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:11,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993932643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:11,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:54:11,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 13 [2021-06-05 06:54:11,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983577629] [2021-06-05 06:54:11,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:54:11,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:54:11,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:54:11,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:54:11,987 INFO L87 Difference]: Start difference. First operand 29604 states and 86226 transitions. Second operand has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:12,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:54:12,566 INFO L93 Difference]: Finished difference Result 41937 states and 120606 transitions. [2021-06-05 06:54:12,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 06:54:12,566 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 06:54:12,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:54:12,639 INFO L225 Difference]: With dead ends: 41937 [2021-06-05 06:54:12,639 INFO L226 Difference]: Without dead ends: 41937 [2021-06-05 06:54:12,639 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 333.2ms TimeCoverageRelationStatistics Valid=546, Invalid=1014, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 06:54:12,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41937 states. [2021-06-05 06:54:13,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41937 to 35832. [2021-06-05 06:54:13,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35832 states, 35831 states have (on average 2.9105523150344674) internal successors, (104288), 35831 states have internal predecessors, (104288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:13,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35832 states to 35832 states and 104288 transitions. [2021-06-05 06:54:13,327 INFO L78 Accepts]: Start accepts. Automaton has 35832 states and 104288 transitions. Word has length 37 [2021-06-05 06:54:13,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:54:13,327 INFO L482 AbstractCegarLoop]: Abstraction has 35832 states and 104288 transitions. [2021-06-05 06:54:13,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:13,327 INFO L276 IsEmpty]: Start isEmpty. Operand 35832 states and 104288 transitions. [2021-06-05 06:54:13,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 06:54:13,370 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:54:13,370 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:54:13,570 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,100 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:54:13,570 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:54:13,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:54:13,571 INFO L82 PathProgramCache]: Analyzing trace with hash -1172006570, now seen corresponding path program 96 times [2021-06-05 06:54:13,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:54:13,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968136324] [2021-06-05 06:54:13,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:54:13,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:54:13,593 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:54:13,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:54:13,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968136324] [2021-06-05 06:54:13,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968136324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:13,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401757845] [2021-06-05 06:54:13,593 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:54:13,619 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 06:54:13,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:54:13,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:54:13,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:54:13,702 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:13,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401757845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:13,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:54:13,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 13 [2021-06-05 06:54:13,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245877962] [2021-06-05 06:54:13,703 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:54:13,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:54:13,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:54:13,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:54:13,703 INFO L87 Difference]: Start difference. First operand 35832 states and 104288 transitions. Second operand has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 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 06:54:14,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:54:14,170 INFO L93 Difference]: Finished difference Result 41300 states and 118909 transitions. [2021-06-05 06:54:14,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 06:54:14,171 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 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 37 [2021-06-05 06:54:14,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:54:14,234 INFO L225 Difference]: With dead ends: 41300 [2021-06-05 06:54:14,234 INFO L226 Difference]: Without dead ends: 41286 [2021-06-05 06:54:14,234 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 270.4ms TimeCoverageRelationStatistics Valid=466, Invalid=940, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 06:54:14,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41286 states. [2021-06-05 06:54:14,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41286 to 35320. [2021-06-05 06:54:14,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35320 states, 35319 states have (on average 2.9060845437300036) internal successors, (102640), 35319 states have internal predecessors, (102640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:14,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35320 states to 35320 states and 102640 transitions. [2021-06-05 06:54:14,820 INFO L78 Accepts]: Start accepts. Automaton has 35320 states and 102640 transitions. Word has length 37 [2021-06-05 06:54:14,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:54:14,820 INFO L482 AbstractCegarLoop]: Abstraction has 35320 states and 102640 transitions. [2021-06-05 06:54:14,820 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 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 06:54:14,820 INFO L276 IsEmpty]: Start isEmpty. Operand 35320 states and 102640 transitions. [2021-06-05 06:54:14,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 06:54:14,860 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:54:14,860 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:54:15,062 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:54:15,062 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:54:15,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:54:15,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1087607796, now seen corresponding path program 97 times [2021-06-05 06:54:15,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:54:15,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261819405] [2021-06-05 06:54:15,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:54:15,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:54:15,110 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:54:15,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:54:15,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261819405] [2021-06-05 06:54:15,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261819405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:15,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745254094] [2021-06-05 06:54:15,111 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:54:15,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:54:15,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:54:15,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:54:15,238 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:15,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745254094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:15,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:54:15,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 06:54:15,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737638096] [2021-06-05 06:54:15,238 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 06:54:15,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:54:15,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 06:54:15,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:54:15,239 INFO L87 Difference]: Start difference. First operand 35320 states and 102640 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 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 06:54:15,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:54:15,874 INFO L93 Difference]: Finished difference Result 41805 states and 120268 transitions. [2021-06-05 06:54:15,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 06:54:15,875 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 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 37 [2021-06-05 06:54:15,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:54:15,958 INFO L225 Difference]: With dead ends: 41805 [2021-06-05 06:54:15,958 INFO L226 Difference]: Without dead ends: 41749 [2021-06-05 06:54:15,959 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 292.9ms TimeCoverageRelationStatistics Valid=411, Invalid=921, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 06:54:16,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41749 states. [2021-06-05 06:54:16,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41749 to 36324. [2021-06-05 06:54:16,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36324 states, 36323 states have (on average 2.9055970046526993) internal successors, (105540), 36323 states have internal predecessors, (105540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:16,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36324 states to 36324 states and 105540 transitions. [2021-06-05 06:54:16,564 INFO L78 Accepts]: Start accepts. Automaton has 36324 states and 105540 transitions. Word has length 37 [2021-06-05 06:54:16,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:54:16,564 INFO L482 AbstractCegarLoop]: Abstraction has 36324 states and 105540 transitions. [2021-06-05 06:54:16,564 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 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 06:54:16,564 INFO L276 IsEmpty]: Start isEmpty. Operand 36324 states and 105540 transitions. [2021-06-05 06:54:16,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 06:54:16,608 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:54:16,608 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:54:16,809 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:54:16,809 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:54:16,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:54:16,809 INFO L82 PathProgramCache]: Analyzing trace with hash 552429714, now seen corresponding path program 98 times [2021-06-05 06:54:16,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:54:16,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507762390] [2021-06-05 06:54:16,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:54:16,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:54:16,844 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:16,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:54:16,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507762390] [2021-06-05 06:54:16,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507762390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:16,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643043926] [2021-06-05 06:54:16,844 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 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:54:16,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:54:16,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:54:16,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:54:16,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:54:16,956 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:16,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643043926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:16,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:54:16,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 06:54:16,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778355110] [2021-06-05 06:54:16,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:54:16,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:54:16,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:54:16,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:54:16,957 INFO L87 Difference]: Start difference. First operand 36324 states and 105540 transitions. Second operand has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 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 06:54:17,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:54:17,366 INFO L93 Difference]: Finished difference Result 42907 states and 123545 transitions. [2021-06-05 06:54:17,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 06:54:17,366 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 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 37 [2021-06-05 06:54:17,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:54:17,434 INFO L225 Difference]: With dead ends: 42907 [2021-06-05 06:54:17,434 INFO L226 Difference]: Without dead ends: 42809 [2021-06-05 06:54:17,435 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 235.5ms TimeCoverageRelationStatistics Valid=364, Invalid=896, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 06:54:17,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42809 states. [2021-06-05 06:54:17,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42809 to 37654. [2021-06-05 06:54:17,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37654 states, 37653 states have (on average 2.904708788144371) internal successors, (109371), 37653 states have internal predecessors, (109371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:18,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37654 states to 37654 states and 109371 transitions. [2021-06-05 06:54:18,059 INFO L78 Accepts]: Start accepts. Automaton has 37654 states and 109371 transitions. Word has length 37 [2021-06-05 06:54:18,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:54:18,059 INFO L482 AbstractCegarLoop]: Abstraction has 37654 states and 109371 transitions. [2021-06-05 06:54:18,059 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 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 06:54:18,059 INFO L276 IsEmpty]: Start isEmpty. Operand 37654 states and 109371 transitions. [2021-06-05 06:54:18,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 06:54:18,105 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:54:18,105 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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 06:54:18,306 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:54:18,306 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:54:18,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:54:18,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1312568382, now seen corresponding path program 99 times [2021-06-05 06:54:18,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:54:18,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767767641] [2021-06-05 06:54:18,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:54:18,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:54:18,464 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:18,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:54:18,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767767641] [2021-06-05 06:54:18,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767767641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:18,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582266400] [2021-06-05 06:54:18,464 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 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:54:18,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:54:18,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:54:18,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:54:18,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:54:18,647 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:18,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582266400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:18,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:54:18,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-06-05 06:54:18,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656321401] [2021-06-05 06:54:18,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:54:18,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:54:18,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:54:18,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:54:18,648 INFO L87 Difference]: Start difference. First operand 37654 states and 109371 transitions. Second operand has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 18 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:18,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:54:18,972 INFO L93 Difference]: Finished difference Result 53826 states and 156188 transitions. [2021-06-05 06:54:18,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 06:54:18,972 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 18 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 06:54:18,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:54:19,071 INFO L225 Difference]: With dead ends: 53826 [2021-06-05 06:54:19,071 INFO L226 Difference]: Without dead ends: 53788 [2021-06-05 06:54:19,071 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 238.9ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:54:19,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53788 states. [2021-06-05 06:54:19,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53788 to 37682. [2021-06-05 06:54:19,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37682 states, 37681 states have (on average 2.90414267137284) internal successors, (109431), 37681 states have internal predecessors, (109431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:19,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37682 states to 37682 states and 109431 transitions. [2021-06-05 06:54:19,847 INFO L78 Accepts]: Start accepts. Automaton has 37682 states and 109431 transitions. Word has length 40 [2021-06-05 06:54:19,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:54:19,847 INFO L482 AbstractCegarLoop]: Abstraction has 37682 states and 109431 transitions. [2021-06-05 06:54:19,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 18 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:19,847 INFO L276 IsEmpty]: Start isEmpty. Operand 37682 states and 109431 transitions. [2021-06-05 06:54:19,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 06:54:19,891 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:54:19,891 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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 06:54:20,091 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-06-05 06:54:20,092 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:54:20,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:54:20,092 INFO L82 PathProgramCache]: Analyzing trace with hash 920480774, now seen corresponding path program 100 times [2021-06-05 06:54:20,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:54:20,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130408517] [2021-06-05 06:54:20,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:54:20,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:54:20,209 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:20,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:54:20,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130408517] [2021-06-05 06:54:20,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130408517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:20,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225400564] [2021-06-05 06:54:20,209 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 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:54:20,233 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:54:20,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:54:20,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:54:20,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:54:20,409 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:20,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225400564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:20,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:54:20,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-05 06:54:20,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916405394] [2021-06-05 06:54:20,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:54:20,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:54:20,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:54:20,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:54:20,410 INFO L87 Difference]: Start difference. First operand 37682 states and 109431 transitions. Second operand has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 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 06:54:21,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:54:21,098 INFO L93 Difference]: Finished difference Result 61487 states and 178572 transitions. [2021-06-05 06:54:21,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 06:54:21,104 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 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 40 [2021-06-05 06:54:21,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:54:21,200 INFO L225 Difference]: With dead ends: 61487 [2021-06-05 06:54:21,200 INFO L226 Difference]: Without dead ends: 61405 [2021-06-05 06:54:21,200 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 314.0ms TimeCoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:54:21,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61405 states. [2021-06-05 06:54:21,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61405 to 44129. [2021-06-05 06:54:22,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44129 states, 44128 states have (on average 2.9096718636693257) internal successors, (128398), 44128 states have internal predecessors, (128398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:22,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44129 states to 44129 states and 128398 transitions. [2021-06-05 06:54:22,226 INFO L78 Accepts]: Start accepts. Automaton has 44129 states and 128398 transitions. Word has length 40 [2021-06-05 06:54:22,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:54:22,227 INFO L482 AbstractCegarLoop]: Abstraction has 44129 states and 128398 transitions. [2021-06-05 06:54:22,227 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 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 06:54:22,227 INFO L276 IsEmpty]: Start isEmpty. Operand 44129 states and 128398 transitions. [2021-06-05 06:54:22,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 06:54:22,284 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:54:22,284 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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 06:54:22,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-06-05 06:54:22,486 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:54:22,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:54:22,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1516586690, now seen corresponding path program 101 times [2021-06-05 06:54:22,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:54:22,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609474811] [2021-06-05 06:54:22,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:54:22,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:54:22,604 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:22,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:54:22,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609474811] [2021-06-05 06:54:22,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609474811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:22,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424719150] [2021-06-05 06:54:22,605 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 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:54:22,633 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:54:22,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:54:22,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:54:22,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:54:22,801 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:22,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424719150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:22,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:54:22,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-05 06:54:22,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475912759] [2021-06-05 06:54:22,801 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:54:22,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:54:22,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:54:22,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:54:22,802 INFO L87 Difference]: Start difference. First operand 44129 states and 128398 transitions. Second operand has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 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 06:54:23,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:54:23,718 INFO L93 Difference]: Finished difference Result 61471 states and 178534 transitions. [2021-06-05 06:54:23,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 06:54:23,718 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 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 40 [2021-06-05 06:54:23,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:54:23,828 INFO L225 Difference]: With dead ends: 61471 [2021-06-05 06:54:23,828 INFO L226 Difference]: Without dead ends: 61359 [2021-06-05 06:54:23,828 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 346.3ms TimeCoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:54:23,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61359 states. [2021-06-05 06:54:24,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61359 to 42975. [2021-06-05 06:54:24,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42975 states, 42974 states have (on average 2.9057336994461767) internal successors, (124871), 42974 states have internal predecessors, (124871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:24,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42975 states to 42975 states and 124871 transitions. [2021-06-05 06:54:24,670 INFO L78 Accepts]: Start accepts. Automaton has 42975 states and 124871 transitions. Word has length 40 [2021-06-05 06:54:24,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:54:24,670 INFO L482 AbstractCegarLoop]: Abstraction has 42975 states and 124871 transitions. [2021-06-05 06:54:24,670 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 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 06:54:24,670 INFO L276 IsEmpty]: Start isEmpty. Operand 42975 states and 124871 transitions. [2021-06-05 06:54:24,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 06:54:24,724 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:54:24,725 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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 06:54:24,925 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-06-05 06:54:24,925 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:54:24,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:54:24,926 INFO L82 PathProgramCache]: Analyzing trace with hash 459063162, now seen corresponding path program 102 times [2021-06-05 06:54:24,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:54:24,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827777434] [2021-06-05 06:54:24,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:54:24,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:54:25,229 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:25,229 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:54:25,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827777434] [2021-06-05 06:54:25,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827777434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:25,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294969683] [2021-06-05 06:54:25,229 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 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:54:25,254 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:54:25,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:54:25,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 06:54:25,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:54:25,461 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:25,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294969683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:25,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:54:25,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-06-05 06:54:25,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996490342] [2021-06-05 06:54:25,461 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 06:54:25,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:54:25,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 06:54:25,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:54:25,462 INFO L87 Difference]: Start difference. First operand 42975 states and 124871 transitions. Second operand has 25 states, 25 states have (on average 2.92) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:26,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:54:26,326 INFO L93 Difference]: Finished difference Result 61721 states and 178788 transitions. [2021-06-05 06:54:26,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 06:54:26,326 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 06:54:26,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:54:26,434 INFO L225 Difference]: With dead ends: 61721 [2021-06-05 06:54:26,434 INFO L226 Difference]: Without dead ends: 61604 [2021-06-05 06:54:26,434 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 784.2ms TimeCoverageRelationStatistics Valid=150, Invalid=1410, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 06:54:26,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61604 states. [2021-06-05 06:54:27,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61604 to 43605. [2021-06-05 06:54:27,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43605 states, 43604 states have (on average 2.906338867993762) internal successors, (126728), 43604 states have internal predecessors, (126728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:27,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43605 states to 43605 states and 126728 transitions. [2021-06-05 06:54:27,320 INFO L78 Accepts]: Start accepts. Automaton has 43605 states and 126728 transitions. Word has length 40 [2021-06-05 06:54:27,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:54:27,320 INFO L482 AbstractCegarLoop]: Abstraction has 43605 states and 126728 transitions. [2021-06-05 06:54:27,320 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:27,320 INFO L276 IsEmpty]: Start isEmpty. Operand 43605 states and 126728 transitions. [2021-06-05 06:54:27,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 06:54:27,374 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:54:27,375 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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 06:54:27,575 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:54:27,575 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:54:27,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:54:27,575 INFO L82 PathProgramCache]: Analyzing trace with hash 1637637984, now seen corresponding path program 103 times [2021-06-05 06:54:27,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:54:27,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739688738] [2021-06-05 06:54:27,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:54:27,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:54:27,721 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:27,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:54:27,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739688738] [2021-06-05 06:54:27,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739688738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:27,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704646141] [2021-06-05 06:54:27,722 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 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:54:27,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:54:27,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:54:27,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:54:28,100 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:28,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704646141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:28,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:54:28,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-05 06:54:28,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136216926] [2021-06-05 06:54:28,101 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:54:28,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:54:28,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:54:28,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:54:28,101 INFO L87 Difference]: Start difference. First operand 43605 states and 126728 transitions. Second operand has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 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 06:54:28,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:54:28,566 INFO L93 Difference]: Finished difference Result 61267 states and 177882 transitions. [2021-06-05 06:54:28,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 06:54:28,567 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 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 40 [2021-06-05 06:54:28,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:54:28,672 INFO L225 Difference]: With dead ends: 61267 [2021-06-05 06:54:28,672 INFO L226 Difference]: Without dead ends: 61191 [2021-06-05 06:54:28,672 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 420.6ms TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:54:28,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61191 states. [2021-06-05 06:54:29,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61191 to 44261. [2021-06-05 06:54:29,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44261 states, 44260 states have (on average 2.9074107546317216) internal successors, (128682), 44260 states have internal predecessors, (128682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:29,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44261 states to 44261 states and 128682 transitions. [2021-06-05 06:54:29,564 INFO L78 Accepts]: Start accepts. Automaton has 44261 states and 128682 transitions. Word has length 40 [2021-06-05 06:54:29,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:54:29,564 INFO L482 AbstractCegarLoop]: Abstraction has 44261 states and 128682 transitions. [2021-06-05 06:54:29,565 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 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 06:54:29,565 INFO L276 IsEmpty]: Start isEmpty. Operand 44261 states and 128682 transitions. [2021-06-05 06:54:29,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 06:54:29,614 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:54:29,614 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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 06:54:29,815 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:54:29,815 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:54:29,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:54:29,815 INFO L82 PathProgramCache]: Analyzing trace with hash 1202515386, now seen corresponding path program 104 times [2021-06-05 06:54:29,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:54:29,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832340008] [2021-06-05 06:54:29,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:54:29,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:54:29,982 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:29,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:54:29,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832340008] [2021-06-05 06:54:29,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832340008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:29,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57291854] [2021-06-05 06:54:29,982 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 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:54:30,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:54:30,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:54:30,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 06:54:30,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:54:30,519 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:30,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57291854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:30,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:54:30,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-06-05 06:54:30,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147378233] [2021-06-05 06:54:30,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 06:54:30,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:54:30,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 06:54:30,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=542, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:54:30,520 INFO L87 Difference]: Start difference. First operand 44261 states and 128682 transitions. Second operand has 25 states, 25 states have (on average 2.92) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:31,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:54:31,269 INFO L93 Difference]: Finished difference Result 61530 states and 178419 transitions. [2021-06-05 06:54:31,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 06:54:31,269 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 06:54:31,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:54:31,381 INFO L225 Difference]: With dead ends: 61530 [2021-06-05 06:54:31,381 INFO L226 Difference]: Without dead ends: 61492 [2021-06-05 06:54:31,381 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 836.9ms TimeCoverageRelationStatistics Valid=119, Invalid=1141, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 06:54:31,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61492 states. [2021-06-05 06:54:32,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61492 to 44283. [2021-06-05 06:54:32,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44283 states, 44282 states have (on average 2.9074341718982883) internal successors, (128747), 44282 states have internal predecessors, (128747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:32,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44283 states to 44283 states and 128747 transitions. [2021-06-05 06:54:32,446 INFO L78 Accepts]: Start accepts. Automaton has 44283 states and 128747 transitions. Word has length 40 [2021-06-05 06:54:32,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:54:32,446 INFO L482 AbstractCegarLoop]: Abstraction has 44283 states and 128747 transitions. [2021-06-05 06:54:32,447 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:32,447 INFO L276 IsEmpty]: Start isEmpty. Operand 44283 states and 128747 transitions. [2021-06-05 06:54:32,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 06:54:32,499 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:54:32,499 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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 06:54:32,699 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:54:32,699 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:54:32,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:54:32,700 INFO L82 PathProgramCache]: Analyzing trace with hash -1556734402, now seen corresponding path program 105 times [2021-06-05 06:54:32,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:54:32,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262003419] [2021-06-05 06:54:32,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:54:32,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:54:32,819 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:32,819 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:54:32,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262003419] [2021-06-05 06:54:32,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262003419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:32,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389285674] [2021-06-05 06:54:32,819 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 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:54:32,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 06:54:32,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:54:32,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 06:54:32,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:54:33,041 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:33,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389285674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:33,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:54:33,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 21 [2021-06-05 06:54:33,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399724922] [2021-06-05 06:54:33,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 06:54:33,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:54:33,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 06:54:33,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2021-06-05 06:54:33,042 INFO L87 Difference]: Start difference. First operand 44283 states and 128747 transitions. Second operand has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:33,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:54:33,874 INFO L93 Difference]: Finished difference Result 56563 states and 164364 transitions. [2021-06-05 06:54:33,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 06:54:33,875 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 06:54:33,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:54:33,959 INFO L225 Difference]: With dead ends: 56563 [2021-06-05 06:54:33,959 INFO L226 Difference]: Without dead ends: 56457 [2021-06-05 06:54:33,960 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 376.0ms TimeCoverageRelationStatistics Valid=115, Invalid=877, Unknown=0, NotChecked=0, Total=992 [2021-06-05 06:54:34,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56457 states. [2021-06-05 06:54:34,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56457 to 52795. [2021-06-05 06:54:34,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52795 states, 52794 states have (on average 2.919252187748608) internal successors, (154119), 52794 states have internal predecessors, (154119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:34,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52795 states to 52795 states and 154119 transitions. [2021-06-05 06:54:34,905 INFO L78 Accepts]: Start accepts. Automaton has 52795 states and 154119 transitions. Word has length 40 [2021-06-05 06:54:34,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:54:34,905 INFO L482 AbstractCegarLoop]: Abstraction has 52795 states and 154119 transitions. [2021-06-05 06:54:34,905 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:34,905 INFO L276 IsEmpty]: Start isEmpty. Operand 52795 states and 154119 transitions. [2021-06-05 06:54:34,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 06:54:34,980 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:54:34,980 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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 06:54:35,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-06-05 06:54:35,181 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:54:35,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:54:35,181 INFO L82 PathProgramCache]: Analyzing trace with hash -280230338, now seen corresponding path program 106 times [2021-06-05 06:54:35,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:54:35,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696144744] [2021-06-05 06:54:35,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:54:35,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:54:35,307 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:35,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:54:35,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696144744] [2021-06-05 06:54:35,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696144744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:35,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489916813] [2021-06-05 06:54:35,307 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 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:54:35,333 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:54:35,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:54:35,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:54:35,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:54:35,529 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:35,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489916813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:35,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:54:35,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2021-06-05 06:54:35,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056762928] [2021-06-05 06:54:35,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:54:35,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:54:35,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:54:35,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:54:35,530 INFO L87 Difference]: Start difference. First operand 52795 states and 154119 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:36,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:54:36,275 INFO L93 Difference]: Finished difference Result 57562 states and 167245 transitions. [2021-06-05 06:54:36,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 06:54:36,275 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 06:54:36,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:54:36,376 INFO L225 Difference]: With dead ends: 57562 [2021-06-05 06:54:36,376 INFO L226 Difference]: Without dead ends: 57438 [2021-06-05 06:54:36,376 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 311.8ms TimeCoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:54:36,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57438 states. [2021-06-05 06:54:37,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57438 to 51595. [2021-06-05 06:54:37,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51595 states, 51594 states have (on average 2.9149319688335855) internal successors, (150393), 51594 states have internal predecessors, (150393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:37,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51595 states to 51595 states and 150393 transitions. [2021-06-05 06:54:37,364 INFO L78 Accepts]: Start accepts. Automaton has 51595 states and 150393 transitions. Word has length 40 [2021-06-05 06:54:37,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:54:37,364 INFO L482 AbstractCegarLoop]: Abstraction has 51595 states and 150393 transitions. [2021-06-05 06:54:37,364 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:37,365 INFO L276 IsEmpty]: Start isEmpty. Operand 51595 states and 150393 transitions. [2021-06-05 06:54:37,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 06:54:37,434 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:54:37,434 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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 06:54:37,634 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:54:37,634 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:54:37,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:54:37,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1270374918, now seen corresponding path program 107 times [2021-06-05 06:54:37,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:54:37,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132644559] [2021-06-05 06:54:37,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:54:37,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:54:37,740 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:37,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:54:37,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132644559] [2021-06-05 06:54:37,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132644559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:37,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251528557] [2021-06-05 06:54:37,741 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 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:54:37,766 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 06:54:37,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:54:37,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:54:37,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:54:38,139 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:38,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251528557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:38,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:54:38,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2021-06-05 06:54:38,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720495389] [2021-06-05 06:54:38,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:54:38,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:54:38,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:54:38,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:54:38,140 INFO L87 Difference]: Start difference. First operand 51595 states and 150393 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:38,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:54:38,629 INFO L93 Difference]: Finished difference Result 55561 states and 161164 transitions. [2021-06-05 06:54:38,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 06:54:38,630 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 06:54:38,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:54:38,725 INFO L225 Difference]: With dead ends: 55561 [2021-06-05 06:54:38,725 INFO L226 Difference]: Without dead ends: 55437 [2021-06-05 06:54:38,726 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 257.1ms TimeCoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:54:38,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55437 states. [2021-06-05 06:54:39,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55437 to 50887. [2021-06-05 06:54:39,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50887 states, 50886 states have (on average 2.9142986283064105) internal successors, (148297), 50886 states have internal predecessors, (148297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:39,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50887 states to 50887 states and 148297 transitions. [2021-06-05 06:54:39,753 INFO L78 Accepts]: Start accepts. Automaton has 50887 states and 148297 transitions. Word has length 40 [2021-06-05 06:54:39,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:54:39,753 INFO L482 AbstractCegarLoop]: Abstraction has 50887 states and 148297 transitions. [2021-06-05 06:54:39,753 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:39,753 INFO L276 IsEmpty]: Start isEmpty. Operand 50887 states and 148297 transitions. [2021-06-05 06:54:39,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 06:54:39,814 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:54:39,814 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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 06:54:40,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2021-06-05 06:54:40,016 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:54:40,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:54:40,016 INFO L82 PathProgramCache]: Analyzing trace with hash 626264254, now seen corresponding path program 108 times [2021-06-05 06:54:40,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:54:40,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319423248] [2021-06-05 06:54:40,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:54:40,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:54:40,141 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:40,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:54:40,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319423248] [2021-06-05 06:54:40,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319423248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:40,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561647490] [2021-06-05 06:54:40,141 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 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:54:40,167 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:54:40,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:54:40,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:54:40,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:54:40,369 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:40,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561647490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:40,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:54:40,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2021-06-05 06:54:40,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174965198] [2021-06-05 06:54:40,370 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:54:40,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:54:40,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:54:40,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:54:40,370 INFO L87 Difference]: Start difference. First operand 50887 states and 148297 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:40,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:54:40,946 INFO L93 Difference]: Finished difference Result 54386 states and 157811 transitions. [2021-06-05 06:54:40,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 06:54:40,947 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 06:54:40,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:54:41,035 INFO L225 Difference]: With dead ends: 54386 [2021-06-05 06:54:41,036 INFO L226 Difference]: Without dead ends: 54310 [2021-06-05 06:54:41,036 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 258.2ms TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:54:41,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54310 states. [2021-06-05 06:54:41,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54310 to 50291. [2021-06-05 06:54:41,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50291 states, 50290 states have (on average 2.913481805527938) internal successors, (146519), 50290 states have internal predecessors, (146519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:41,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50291 states to 50291 states and 146519 transitions. [2021-06-05 06:54:41,954 INFO L78 Accepts]: Start accepts. Automaton has 50291 states and 146519 transitions. Word has length 40 [2021-06-05 06:54:41,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:54:41,954 INFO L482 AbstractCegarLoop]: Abstraction has 50291 states and 146519 transitions. [2021-06-05 06:54:41,954 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:41,954 INFO L276 IsEmpty]: Start isEmpty. Operand 50291 states and 146519 transitions. [2021-06-05 06:54:42,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 06:54:42,011 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:54:42,011 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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 06:54:42,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:54:42,212 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:54:42,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:54:42,212 INFO L82 PathProgramCache]: Analyzing trace with hash 1839351558, now seen corresponding path program 109 times [2021-06-05 06:54:42,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:54:42,212 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873343470] [2021-06-05 06:54:42,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:54:42,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:54:42,359 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:42,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:54:42,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873343470] [2021-06-05 06:54:42,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873343470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:42,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112125195] [2021-06-05 06:54:42,360 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 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:54:42,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:54:42,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:54:42,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:54:42,563 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:42,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112125195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:42,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:54:42,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 06:54:42,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178587510] [2021-06-05 06:54:42,563 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 06:54:42,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:54:42,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 06:54:42,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:54:42,563 INFO L87 Difference]: Start difference. First operand 50291 states and 146519 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:43,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:54:43,215 INFO L93 Difference]: Finished difference Result 54366 states and 157749 transitions. [2021-06-05 06:54:43,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 06:54:43,216 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 06:54:43,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:54:43,316 INFO L225 Difference]: With dead ends: 54366 [2021-06-05 06:54:43,316 INFO L226 Difference]: Without dead ends: 54290 [2021-06-05 06:54:43,316 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 264.2ms TimeCoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:54:43,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54290 states. [2021-06-05 06:54:44,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54290 to 50899. [2021-06-05 06:54:44,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50899 states, 50898 states have (on average 2.913945538135094) internal successors, (148314), 50898 states have internal predecessors, (148314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:44,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50899 states to 50899 states and 148314 transitions. [2021-06-05 06:54:44,300 INFO L78 Accepts]: Start accepts. Automaton has 50899 states and 148314 transitions. Word has length 40 [2021-06-05 06:54:44,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:54:44,300 INFO L482 AbstractCegarLoop]: Abstraction has 50899 states and 148314 transitions. [2021-06-05 06:54:44,300 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:44,300 INFO L276 IsEmpty]: Start isEmpty. Operand 50899 states and 148314 transitions. [2021-06-05 06:54:44,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 06:54:44,365 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:54:44,365 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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 06:54:44,566 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:54:44,566 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:54:44,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:54:44,567 INFO L82 PathProgramCache]: Analyzing trace with hash 665879302, now seen corresponding path program 110 times [2021-06-05 06:54:44,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:54:44,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490684703] [2021-06-05 06:54:44,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:54:44,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:54:44,726 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:44,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:54:44,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490684703] [2021-06-05 06:54:44,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490684703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:44,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858187845] [2021-06-05 06:54:44,726 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 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:54:44,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:54:44,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:54:44,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 06:54:44,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:54:45,043 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:45,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858187845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:45,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:54:45,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-06-05 06:54:45,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427467629] [2021-06-05 06:54:45,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 06:54:45,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:54:45,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 06:54:45,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=539, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:54:45,047 INFO L87 Difference]: Start difference. First operand 50899 states and 148314 transitions. Second operand has 25 states, 25 states have (on average 2.92) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:45,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:54:45,823 INFO L93 Difference]: Finished difference Result 57635 states and 168077 transitions. [2021-06-05 06:54:45,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 06:54:45,824 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 06:54:45,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:54:45,927 INFO L225 Difference]: With dead ends: 57635 [2021-06-05 06:54:45,927 INFO L226 Difference]: Without dead ends: 57513 [2021-06-05 06:54:45,928 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 595.5ms TimeCoverageRelationStatistics Valid=140, Invalid=1266, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 06:54:46,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57513 states. [2021-06-05 06:54:47,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57513 to 56897. [2021-06-05 06:54:47,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56897 states, 56896 states have (on average 2.92415987064117) internal successors, (166373), 56896 states have internal predecessors, (166373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:47,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56897 states to 56897 states and 166373 transitions. [2021-06-05 06:54:47,219 INFO L78 Accepts]: Start accepts. Automaton has 56897 states and 166373 transitions. Word has length 40 [2021-06-05 06:54:47,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:54:47,219 INFO L482 AbstractCegarLoop]: Abstraction has 56897 states and 166373 transitions. [2021-06-05 06:54:47,219 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:47,219 INFO L276 IsEmpty]: Start isEmpty. Operand 56897 states and 166373 transitions. [2021-06-05 06:54:47,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 06:54:47,300 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:54:47,300 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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 06:54:47,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:54:47,505 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:54:47,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:54:47,505 INFO L82 PathProgramCache]: Analyzing trace with hash -557051134, now seen corresponding path program 111 times [2021-06-05 06:54:47,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:54:47,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766604643] [2021-06-05 06:54:47,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:54:47,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:54:47,612 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:47,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:54:47,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766604643] [2021-06-05 06:54:47,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766604643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:47,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894645041] [2021-06-05 06:54:47,612 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 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:54:47,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 06:54:47,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:54:47,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:54:47,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:54:47,826 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:47,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894645041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:47,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:54:47,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-06-05 06:54:47,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649048014] [2021-06-05 06:54:47,827 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:54:47,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:54:47,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:54:47,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:54:47,827 INFO L87 Difference]: Start difference. First operand 56897 states and 166373 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:48,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:54:48,256 INFO L93 Difference]: Finished difference Result 58288 states and 170073 transitions. [2021-06-05 06:54:48,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 06:54:48,256 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 06:54:48,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:54:48,358 INFO L225 Difference]: With dead ends: 58288 [2021-06-05 06:54:48,358 INFO L226 Difference]: Without dead ends: 58158 [2021-06-05 06:54:48,358 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 266.3ms TimeCoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:54:48,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58158 states. [2021-06-05 06:54:49,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58158 to 52473. [2021-06-05 06:54:49,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52473 states, 52472 states have (on average 2.9211579509071504) internal successors, (153279), 52472 states have internal predecessors, (153279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:49,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52473 states to 52473 states and 153279 transitions. [2021-06-05 06:54:49,442 INFO L78 Accepts]: Start accepts. Automaton has 52473 states and 153279 transitions. Word has length 40 [2021-06-05 06:54:49,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:54:49,442 INFO L482 AbstractCegarLoop]: Abstraction has 52473 states and 153279 transitions. [2021-06-05 06:54:49,442 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:49,442 INFO L276 IsEmpty]: Start isEmpty. Operand 52473 states and 153279 transitions. [2021-06-05 06:54:49,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 06:54:49,814 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:54:49,814 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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 06:54:50,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-06-05 06:54:50,017 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:54:50,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:54:50,017 INFO L82 PathProgramCache]: Analyzing trace with hash -161255976, now seen corresponding path program 112 times [2021-06-05 06:54:50,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:54:50,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001670064] [2021-06-05 06:54:50,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:54:50,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:54:50,118 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:50,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:54:50,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001670064] [2021-06-05 06:54:50,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001670064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:50,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691933742] [2021-06-05 06:54:50,119 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 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:54:50,146 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:54:50,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:54:50,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:54:50,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:54:50,353 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:50,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691933742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:50,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:54:50,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-06-05 06:54:50,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830716836] [2021-06-05 06:54:50,353 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:54:50,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:54:50,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:54:50,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:54:50,354 INFO L87 Difference]: Start difference. First operand 52473 states and 153279 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:50,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:54:50,793 INFO L93 Difference]: Finished difference Result 53321 states and 155327 transitions. [2021-06-05 06:54:50,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 06:54:50,793 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 06:54:50,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:54:50,885 INFO L225 Difference]: With dead ends: 53321 [2021-06-05 06:54:50,886 INFO L226 Difference]: Without dead ends: 53204 [2021-06-05 06:54:50,886 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 258.1ms TimeCoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:54:50,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53204 states. [2021-06-05 06:54:51,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53204 to 51075. [2021-06-05 06:54:51,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51075 states, 51074 states have (on average 2.920350863453029) internal successors, (149154), 51074 states have internal predecessors, (149154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:51,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51075 states to 51075 states and 149154 transitions. [2021-06-05 06:54:51,948 INFO L78 Accepts]: Start accepts. Automaton has 51075 states and 149154 transitions. Word has length 40 [2021-06-05 06:54:51,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:54:51,948 INFO L482 AbstractCegarLoop]: Abstraction has 51075 states and 149154 transitions. [2021-06-05 06:54:51,948 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:51,948 INFO L276 IsEmpty]: Start isEmpty. Operand 51075 states and 149154 transitions. [2021-06-05 06:54:52,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 06:54:52,010 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:54:52,010 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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 06:54:52,210 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:54:52,210 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:54:52,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:54:52,211 INFO L82 PathProgramCache]: Analyzing trace with hash 2036427680, now seen corresponding path program 113 times [2021-06-05 06:54:52,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:54:52,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017397348] [2021-06-05 06:54:52,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:54:52,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:54:52,346 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:52,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:54:52,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017397348] [2021-06-05 06:54:52,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017397348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:52,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015011290] [2021-06-05 06:54:52,346 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:54:52,371 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 06:54:52,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:54:52,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:54:52,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:54:52,601 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:52,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015011290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:52,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:54:52,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-06-05 06:54:52,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934493792] [2021-06-05 06:54:52,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 06:54:52,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:54:52,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 06:54:52,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:54:52,602 INFO L87 Difference]: Start difference. First operand 51075 states and 149154 transitions. Second operand has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:53,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:54:53,261 INFO L93 Difference]: Finished difference Result 53291 states and 155408 transitions. [2021-06-05 06:54:53,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 06:54:53,261 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 06:54:53,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:54:53,346 INFO L225 Difference]: With dead ends: 53291 [2021-06-05 06:54:53,346 INFO L226 Difference]: Without dead ends: 53215 [2021-06-05 06:54:53,347 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 297.6ms TimeCoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:54:53,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53215 states. [2021-06-05 06:54:54,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53215 to 50481. [2021-06-05 06:54:54,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50481 states, 50480 states have (on average 2.9226426307448494) internal successors, (147535), 50480 states have internal predecessors, (147535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:54,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50481 states to 50481 states and 147535 transitions. [2021-06-05 06:54:54,365 INFO L78 Accepts]: Start accepts. Automaton has 50481 states and 147535 transitions. Word has length 40 [2021-06-05 06:54:54,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:54:54,365 INFO L482 AbstractCegarLoop]: Abstraction has 50481 states and 147535 transitions. [2021-06-05 06:54:54,366 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:54,366 INFO L276 IsEmpty]: Start isEmpty. Operand 50481 states and 147535 transitions. [2021-06-05 06:54:54,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 06:54:54,427 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:54:54,427 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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 06:54:54,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:54:54,628 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:54:54,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:54:54,628 INFO L82 PathProgramCache]: Analyzing trace with hash -711983976, now seen corresponding path program 114 times [2021-06-05 06:54:54,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:54:54,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639896247] [2021-06-05 06:54:54,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:54:54,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:54:54,742 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 06:54:54,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:54:54,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639896247] [2021-06-05 06:54:54,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639896247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:54,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596794732] [2021-06-05 06:54:54,743 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:54:54,768 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:54:54,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:54:54,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:54:54,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:54:54,962 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:54,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596794732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:54,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:54:54,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-06-05 06:54:54,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678765026] [2021-06-05 06:54:54,962 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 06:54:54,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:54:54,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 06:54:54,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:54:54,963 INFO L87 Difference]: Start difference. First operand 50481 states and 147535 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:55,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:54:55,361 INFO L93 Difference]: Finished difference Result 51763 states and 151105 transitions. [2021-06-05 06:54:55,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 06:54:55,362 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 06:54:55,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:54:55,452 INFO L225 Difference]: With dead ends: 51763 [2021-06-05 06:54:55,452 INFO L226 Difference]: Without dead ends: 51687 [2021-06-05 06:54:55,452 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 247.0ms TimeCoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:54:55,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51687 states. [2021-06-05 06:54:56,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51687 to 51357. [2021-06-05 06:54:56,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51357 states, 51356 states have (on average 2.924429472700366) internal successors, (150187), 51356 states have internal predecessors, (150187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:56,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51357 states to 51357 states and 150187 transitions. [2021-06-05 06:54:56,544 INFO L78 Accepts]: Start accepts. Automaton has 51357 states and 150187 transitions. Word has length 40 [2021-06-05 06:54:56,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:54:56,544 INFO L482 AbstractCegarLoop]: Abstraction has 51357 states and 150187 transitions. [2021-06-05 06:54:56,544 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:56,544 INFO L276 IsEmpty]: Start isEmpty. Operand 51357 states and 150187 transitions. [2021-06-05 06:54:56,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 06:54:56,607 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:54:56,607 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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 06:54:56,807 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable175 [2021-06-05 06:54:56,808 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:54:56,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:54:56,808 INFO L82 PathProgramCache]: Analyzing trace with hash 748763352, now seen corresponding path program 115 times [2021-06-05 06:54:56,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:54:56,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780531927] [2021-06-05 06:54:56,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:54:56,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:54:56,960 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:56,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:54:56,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780531927] [2021-06-05 06:54:56,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780531927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:56,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098183937] [2021-06-05 06:54:56,961 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 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:54:56,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:54:56,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:54:56,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:54:57,213 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:57,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098183937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:57,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:54:57,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 06:54:57,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902787255] [2021-06-05 06:54:57,214 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 06:54:57,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:54:57,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 06:54:57,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-06-05 06:54:57,214 INFO L87 Difference]: Start difference. First operand 51357 states and 150187 transitions. Second operand has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 21 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:57,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:54:57,929 INFO L93 Difference]: Finished difference Result 51807 states and 151188 transitions. [2021-06-05 06:54:57,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 06:54:57,929 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 21 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 06:54:57,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:54:58,017 INFO L225 Difference]: With dead ends: 51807 [2021-06-05 06:54:58,018 INFO L226 Difference]: Without dead ends: 51731 [2021-06-05 06:54:58,018 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 301.5ms TimeCoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:54:58,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51731 states. [2021-06-05 06:54:58,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51731 to 51351. [2021-06-05 06:54:58,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51351 states, 51350 states have (on average 2.924479065238559) internal successors, (150172), 51350 states have internal predecessors, (150172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:59,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51351 states to 51351 states and 150172 transitions. [2021-06-05 06:54:59,095 INFO L78 Accepts]: Start accepts. Automaton has 51351 states and 150172 transitions. Word has length 40 [2021-06-05 06:54:59,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:54:59,095 INFO L482 AbstractCegarLoop]: Abstraction has 51351 states and 150172 transitions. [2021-06-05 06:54:59,095 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 21 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:59,095 INFO L276 IsEmpty]: Start isEmpty. Operand 51351 states and 150172 transitions. [2021-06-05 06:54:59,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 06:54:59,159 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:54:59,160 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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 06:54:59,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-06-05 06:54:59,360 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:54:59,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:54:59,360 INFO L82 PathProgramCache]: Analyzing trace with hash -960067266, now seen corresponding path program 116 times [2021-06-05 06:54:59,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:54:59,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616145043] [2021-06-05 06:54:59,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:54:59,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:54:59,500 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:59,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:54:59,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616145043] [2021-06-05 06:54:59,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616145043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:59,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838961042] [2021-06-05 06:54:59,501 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 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:54:59,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:54:59,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:54:59,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 06:54:59,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:54:59,760 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:59,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838961042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:59,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:54:59,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-06-05 06:54:59,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661345768] [2021-06-05 06:54:59,761 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 06:54:59,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:54:59,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 06:54:59,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:54:59,761 INFO L87 Difference]: Start difference. First operand 51351 states and 150172 transitions. Second operand has 25 states, 25 states have (on average 2.92) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:55:00,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:55:00,478 INFO L93 Difference]: Finished difference Result 60681 states and 177304 transitions. [2021-06-05 06:55:00,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 06:55:00,478 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 06:55:00,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:55:00,585 INFO L225 Difference]: With dead ends: 60681 [2021-06-05 06:55:00,585 INFO L226 Difference]: Without dead ends: 60579 [2021-06-05 06:55:00,585 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 503.4ms TimeCoverageRelationStatistics Valid=124, Invalid=1136, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 06:55:00,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60579 states. [2021-06-05 06:55:01,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60579 to 60113. [2021-06-05 06:55:01,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60113 states, 60112 states have (on average 2.927751530476444) internal successors, (175993), 60112 states have internal predecessors, (175993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:55:02,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60113 states to 60113 states and 175993 transitions. [2021-06-05 06:55:02,136 INFO L78 Accepts]: Start accepts. Automaton has 60113 states and 175993 transitions. Word has length 40 [2021-06-05 06:55:02,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:55:02,136 INFO L482 AbstractCegarLoop]: Abstraction has 60113 states and 175993 transitions. [2021-06-05 06:55:02,136 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:55:02,136 INFO L276 IsEmpty]: Start isEmpty. Operand 60113 states and 175993 transitions. [2021-06-05 06:55:02,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 06:55:02,234 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:55:02,234 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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 06:55:02,434 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-06-05 06:55:02,434 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:55:02,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:55:02,435 INFO L82 PathProgramCache]: Analyzing trace with hash -988176450, now seen corresponding path program 117 times [2021-06-05 06:55:02,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:55:02,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897183942] [2021-06-05 06:55:02,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:55:02,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:55:02,533 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:55:02,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:55:02,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897183942] [2021-06-05 06:55:02,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897183942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:55:02,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382519805] [2021-06-05 06:55:02,533 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 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:55:02,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 06:55:02,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:55:02,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:55:02,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:55:02,783 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:55:02,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382519805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:55:02,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:55:02,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 19 [2021-06-05 06:55:02,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37910786] [2021-06-05 06:55:02,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:55:02,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:55:02,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:55:02,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:55:02,784 INFO L87 Difference]: Start difference. First operand 60113 states and 175993 transitions. Second operand has 20 states, 20 states have (on average 3.3) internal successors, (66), 19 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:55:03,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:55:03,209 INFO L93 Difference]: Finished difference Result 60823 states and 177836 transitions. [2021-06-05 06:55:03,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 06:55:03,209 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 19 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 06:55:03,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:55:03,330 INFO L225 Difference]: With dead ends: 60823 [2021-06-05 06:55:03,330 INFO L226 Difference]: Without dead ends: 60707 [2021-06-05 06:55:03,330 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 233.6ms TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-06-05 06:55:03,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60707 states. [2021-06-05 06:55:04,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60707 to 60113. [2021-06-05 06:55:04,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60113 states, 60112 states have (on average 2.9261212403513444) internal successors, (175895), 60112 states have internal predecessors, (175895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:55:04,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60113 states to 60113 states and 175895 transitions. [2021-06-05 06:55:04,529 INFO L78 Accepts]: Start accepts. Automaton has 60113 states and 175895 transitions. Word has length 40 [2021-06-05 06:55:04,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:55:04,529 INFO L482 AbstractCegarLoop]: Abstraction has 60113 states and 175895 transitions. [2021-06-05 06:55:04,529 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 19 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:55:04,529 INFO L276 IsEmpty]: Start isEmpty. Operand 60113 states and 175895 transitions. [2021-06-05 06:55:04,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 06:55:04,615 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:55:04,615 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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 06:55:04,815 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable181 [2021-06-05 06:55:04,815 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:55:04,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:55:04,816 INFO L82 PathProgramCache]: Analyzing trace with hash -851969850, now seen corresponding path program 118 times [2021-06-05 06:55:04,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:55:04,816 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773439273] [2021-06-05 06:55:04,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:55:04,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:55:04,926 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:55:04,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:55:04,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773439273] [2021-06-05 06:55:04,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773439273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:55:04,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060443430] [2021-06-05 06:55:04,927 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 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:55:04,959 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:55:04,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:55:04,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:55:04,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:55:05,183 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:55:05,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060443430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:55:05,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:55:05,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2021-06-05 06:55:05,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246272178] [2021-06-05 06:55:05,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 06:55:05,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:55:05,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 06:55:05,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:55:05,184 INFO L87 Difference]: Start difference. First operand 60113 states and 175895 transitions. Second operand has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:55:05,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:55:05,961 INFO L93 Difference]: Finished difference Result 64142 states and 187437 transitions. [2021-06-05 06:55:05,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 06:55:05,961 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 06:55:05,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:55:06,078 INFO L225 Difference]: With dead ends: 64142 [2021-06-05 06:55:06,079 INFO L226 Difference]: Without dead ends: 64018 [2021-06-05 06:55:06,079 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 261.8ms TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:55:06,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64018 states. [2021-06-05 06:55:07,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64018 to 63541. [2021-06-05 06:55:07,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63541 states, 63540 states have (on average 2.9268334907145106) internal successors, (185971), 63540 states have internal predecessors, (185971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:55:07,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63541 states to 63541 states and 185971 transitions. [2021-06-05 06:55:07,266 INFO L78 Accepts]: Start accepts. Automaton has 63541 states and 185971 transitions. Word has length 40 [2021-06-05 06:55:07,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:55:07,266 INFO L482 AbstractCegarLoop]: Abstraction has 63541 states and 185971 transitions. [2021-06-05 06:55:07,266 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:55:07,266 INFO L276 IsEmpty]: Start isEmpty. Operand 63541 states and 185971 transitions. [2021-06-05 06:55:07,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 06:55:07,354 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:55:07,354 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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 06:55:07,555 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:55:07,555 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:55:07,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:55:07,555 INFO L82 PathProgramCache]: Analyzing trace with hash 2140494270, now seen corresponding path program 119 times [2021-06-05 06:55:07,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:55:07,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142710258] [2021-06-05 06:55:07,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:55:07,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:55:07,666 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 06:55:07,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:55:07,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142710258] [2021-06-05 06:55:07,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142710258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:55:07,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039347304] [2021-06-05 06:55:07,666 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 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:55:07,699 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 06:55:07,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:55:07,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:55:07,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:55:07,927 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:55:07,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039347304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:55:07,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:55:07,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2021-06-05 06:55:07,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093137051] [2021-06-05 06:55:07,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 06:55:07,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:55:07,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 06:55:07,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:55:07,928 INFO L87 Difference]: Start difference. First operand 63541 states and 185971 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:55:08,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:55:08,697 INFO L93 Difference]: Finished difference Result 67150 states and 196442 transitions. [2021-06-05 06:55:08,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 06:55:08,713 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 06:55:08,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:55:08,839 INFO L225 Difference]: With dead ends: 67150 [2021-06-05 06:55:08,839 INFO L226 Difference]: Without dead ends: 67019 [2021-06-05 06:55:08,839 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 266.6ms TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:55:08,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67019 states. [2021-06-05 06:55:09,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67019 to 66567. [2021-06-05 06:55:10,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66567 states, 66566 states have (on average 2.929483520115374) internal successors, (195004), 66566 states have internal predecessors, (195004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:55:10,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66567 states to 66567 states and 195004 transitions. [2021-06-05 06:55:10,157 INFO L78 Accepts]: Start accepts. Automaton has 66567 states and 195004 transitions. Word has length 40 [2021-06-05 06:55:10,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:55:10,157 INFO L482 AbstractCegarLoop]: Abstraction has 66567 states and 195004 transitions. [2021-06-05 06:55:10,157 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:55:10,157 INFO L276 IsEmpty]: Start isEmpty. Operand 66567 states and 195004 transitions. [2021-06-05 06:55:10,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 06:55:10,248 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:55:10,248 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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 06:55:10,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:55:10,449 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:55:10,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:55:10,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1155037826, now seen corresponding path program 120 times [2021-06-05 06:55:10,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:55:10,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354406103] [2021-06-05 06:55:10,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:55:10,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:55:10,576 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:55:10,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:55:10,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354406103] [2021-06-05 06:55:10,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354406103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:55:10,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090984958] [2021-06-05 06:55:10,577 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 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:55:10,602 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:55:10,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:55:10,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:55:10,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:55:10,819 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:55:10,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090984958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:55:10,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:55:10,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-06-05 06:55:10,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333614684] [2021-06-05 06:55:10,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 06:55:10,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:55:10,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 06:55:10,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-06-05 06:55:10,819 INFO L87 Difference]: Start difference. First operand 66567 states and 195004 transitions. Second operand has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:55:11,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:55:11,337 INFO L93 Difference]: Finished difference Result 67138 states and 196301 transitions. [2021-06-05 06:55:11,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 06:55:11,338 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 06:55:11,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:55:11,456 INFO L225 Difference]: With dead ends: 67138 [2021-06-05 06:55:11,457 INFO L226 Difference]: Without dead ends: 67008 [2021-06-05 06:55:11,457 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 272.9ms TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:55:11,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67008 states. [2021-06-05 06:55:12,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67008 to 66551. [2021-06-05 06:55:12,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66551 states, 66550 states have (on average 2.929526671675432) internal successors, (194960), 66550 states have internal predecessors, (194960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:55:13,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66551 states to 66551 states and 194960 transitions. [2021-06-05 06:55:13,164 INFO L78 Accepts]: Start accepts. Automaton has 66551 states and 194960 transitions. Word has length 40 [2021-06-05 06:55:13,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:55:13,164 INFO L482 AbstractCegarLoop]: Abstraction has 66551 states and 194960 transitions. [2021-06-05 06:55:13,164 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:55:13,164 INFO L276 IsEmpty]: Start isEmpty. Operand 66551 states and 194960 transitions. [2021-06-05 06:55:13,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 06:55:13,264 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:55:13,264 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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 06:55:13,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:55:13,465 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:55:13,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:55:13,465 INFO L82 PathProgramCache]: Analyzing trace with hash 2930118, now seen corresponding path program 121 times [2021-06-05 06:55:13,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:55:13,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039684751] [2021-06-05 06:55:13,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:55:13,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:55:13,570 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 06:55:13,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:55:13,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039684751] [2021-06-05 06:55:13,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039684751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:55:13,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758087717] [2021-06-05 06:55:13,571 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 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:55:13,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:55:13,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:55:13,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:55:13,858 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:55:13,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758087717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:55:13,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:55:13,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2021-06-05 06:55:13,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178813081] [2021-06-05 06:55:13,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 06:55:13,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:55:13,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 06:55:13,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:55:13,859 INFO L87 Difference]: Start difference. First operand 66551 states and 194960 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:55:14,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:55:14,292 INFO L93 Difference]: Finished difference Result 68643 states and 200950 transitions. [2021-06-05 06:55:14,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 06:55:14,292 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 06:55:14,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:55:14,415 INFO L225 Difference]: With dead ends: 68643 [2021-06-05 06:55:14,415 INFO L226 Difference]: Without dead ends: 68519 [2021-06-05 06:55:14,415 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 279.6ms TimeCoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:55:14,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68519 states. [2021-06-05 06:55:15,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68519 to 68109. [2021-06-05 06:55:15,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68109 states, 68108 states have (on average 2.9315352087860456) internal successors, (199661), 68108 states have internal predecessors, (199661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:55:15,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68109 states to 68109 states and 199661 transitions. [2021-06-05 06:55:15,880 INFO L78 Accepts]: Start accepts. Automaton has 68109 states and 199661 transitions. Word has length 40 [2021-06-05 06:55:15,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:55:15,880 INFO L482 AbstractCegarLoop]: Abstraction has 68109 states and 199661 transitions. [2021-06-05 06:55:15,880 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:55:15,880 INFO L276 IsEmpty]: Start isEmpty. Operand 68109 states and 199661 transitions. [2021-06-05 06:55:16,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 06:55:16,299 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:55:16,299 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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 06:55:16,511 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-06-05 06:55:16,512 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:55:16,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:55:16,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1002365318, now seen corresponding path program 122 times [2021-06-05 06:55:16,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:55:16,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998940382] [2021-06-05 06:55:16,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:55:16,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:55:16,633 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 06:55:16,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:55:16,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998940382] [2021-06-05 06:55:16,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998940382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:55:16,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881447707] [2021-06-05 06:55:16,634 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 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:55:16,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:55:16,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:55:16,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:55:16,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:55:16,868 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:55:16,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881447707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:55:16,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:55:16,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-06-05 06:55:16,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888457591] [2021-06-05 06:55:16,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 06:55:16,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:55:16,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 06:55:16,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2021-06-05 06:55:16,869 INFO L87 Difference]: Start difference. First operand 68109 states and 199661 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:55:17,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:55:17,377 INFO L93 Difference]: Finished difference Result 68644 states and 200867 transitions. [2021-06-05 06:55:17,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 06:55:17,378 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 06:55:17,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:55:17,495 INFO L225 Difference]: With dead ends: 68644 [2021-06-05 06:55:17,495 INFO L226 Difference]: Without dead ends: 68514 [2021-06-05 06:55:17,495 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 271.5ms TimeCoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:55:17,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68514 states. [2021-06-05 06:55:18,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68514 to 68093. [2021-06-05 06:55:18,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68093 states, 68092 states have (on average 2.9315778652411444) internal successors, (199617), 68092 states have internal predecessors, (199617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:55:18,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68093 states to 68093 states and 199617 transitions. [2021-06-05 06:55:18,807 INFO L78 Accepts]: Start accepts. Automaton has 68093 states and 199617 transitions. Word has length 40 [2021-06-05 06:55:18,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:55:18,807 INFO L482 AbstractCegarLoop]: Abstraction has 68093 states and 199617 transitions. [2021-06-05 06:55:18,807 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:55:18,807 INFO L276 IsEmpty]: Start isEmpty. Operand 68093 states and 199617 transitions. [2021-06-05 06:55:18,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 06:55:18,907 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:55:18,907 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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 06:55:19,107 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:55:19,108 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:55:19,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:55:19,108 INFO L82 PathProgramCache]: Analyzing trace with hash -1831854650, now seen corresponding path program 123 times [2021-06-05 06:55:19,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:55:19,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564053026] [2021-06-05 06:55:19,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:55:19,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:55:19,252 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:55:19,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:55:19,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564053026] [2021-06-05 06:55:19,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564053026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:55:19,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608875150] [2021-06-05 06:55:19,252 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 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:55:19,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:55:19,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:55:19,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:55:19,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:55:19,793 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:55:19,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608875150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:55:19,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:55:19,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 06:55:19,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583382629] [2021-06-05 06:55:19,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:55:19,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:55:19,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:55:19,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:55:19,794 INFO L87 Difference]: Start difference. First operand 68093 states and 199617 transitions. Second operand has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:55:20,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:55:20,330 INFO L93 Difference]: Finished difference Result 68603 states and 200761 transitions. [2021-06-05 06:55:20,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 06:55:20,331 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 06:55:20,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:55:20,447 INFO L225 Difference]: With dead ends: 68603 [2021-06-05 06:55:20,447 INFO L226 Difference]: Without dead ends: 68527 [2021-06-05 06:55:20,447 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 345.6ms TimeCoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:55:20,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68527 states. [2021-06-05 06:55:21,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68527 to 68087. [2021-06-05 06:55:21,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68087 states, 68086 states have (on average 2.9316158975413447) internal successors, (199602), 68086 states have internal predecessors, (199602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:55:21,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68087 states to 68087 states and 199602 transitions. [2021-06-05 06:55:21,772 INFO L78 Accepts]: Start accepts. Automaton has 68087 states and 199602 transitions. Word has length 40 [2021-06-05 06:55:21,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:55:21,772 INFO L482 AbstractCegarLoop]: Abstraction has 68087 states and 199602 transitions. [2021-06-05 06:55:21,772 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:55:21,772 INFO L276 IsEmpty]: Start isEmpty. Operand 68087 states and 199602 transitions. [2021-06-05 06:55:21,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 06:55:21,864 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:55:21,864 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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 06:55:22,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable193 [2021-06-05 06:55:22,064 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:55:22,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:55:22,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1497503238, now seen corresponding path program 124 times [2021-06-05 06:55:22,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:55:22,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956338774] [2021-06-05 06:55:22,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:55:22,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:55:22,216 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:55:22,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:55:22,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956338774] [2021-06-05 06:55:22,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956338774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:55:22,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226060549] [2021-06-05 06:55:22,216 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 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:55:22,245 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:55:22,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:55:22,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:55:22,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:55:22,405 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:55:22,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226060549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:55:22,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:55:22,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-06-05 06:55:22,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989418818] [2021-06-05 06:55:22,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:55:22,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:55:22,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:55:22,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:55:22,406 INFO L87 Difference]: Start difference. First operand 68087 states and 199602 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 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 06:55:23,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:55:23,144 INFO L93 Difference]: Finished difference Result 90862 states and 266329 transitions. [2021-06-05 06:55:23,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 06:55:23,144 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 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 40 [2021-06-05 06:55:23,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:55:23,306 INFO L225 Difference]: With dead ends: 90862 [2021-06-05 06:55:23,306 INFO L226 Difference]: Without dead ends: 90825 [2021-06-05 06:55:23,306 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 230.3ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:55:23,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90825 states. [2021-06-05 06:55:24,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90825 to 68095. [2021-06-05 06:55:24,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68095 states, 68094 states have (on average 2.931565189297148) internal successors, (199622), 68094 states have internal predecessors, (199622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:55:24,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68095 states to 68095 states and 199622 transitions. [2021-06-05 06:55:24,754 INFO L78 Accepts]: Start accepts. Automaton has 68095 states and 199622 transitions. Word has length 40 [2021-06-05 06:55:24,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:55:24,754 INFO L482 AbstractCegarLoop]: Abstraction has 68095 states and 199622 transitions. [2021-06-05 06:55:24,754 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 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 06:55:24,754 INFO L276 IsEmpty]: Start isEmpty. Operand 68095 states and 199622 transitions. [2021-06-05 06:55:24,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 06:55:24,852 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:55:24,852 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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 06:55:25,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:55:25,053 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:55:25,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:55:25,053 INFO L82 PathProgramCache]: Analyzing trace with hash -627011198, now seen corresponding path program 125 times [2021-06-05 06:55:25,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:55:25,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331036627] [2021-06-05 06:55:25,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:55:25,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:55:25,187 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:55:25,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:55:25,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331036627] [2021-06-05 06:55:25,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331036627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:55:25,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781536088] [2021-06-05 06:55:25,188 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 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:55:25,217 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:55:25,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:55:25,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:55:25,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:55:25,392 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:55:25,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781536088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:55:25,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:55:25,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-05 06:55:25,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635271707] [2021-06-05 06:55:25,393 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:55:25,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:55:25,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:55:25,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:55:25,393 INFO L87 Difference]: Start difference. First operand 68095 states and 199622 transitions. Second operand has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 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 06:55:26,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:55:26,206 INFO L93 Difference]: Finished difference Result 90806 states and 266237 transitions. [2021-06-05 06:55:26,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 06:55:26,206 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 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 40 [2021-06-05 06:55:26,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:55:26,361 INFO L225 Difference]: With dead ends: 90806 [2021-06-05 06:55:26,361 INFO L226 Difference]: Without dead ends: 90769 [2021-06-05 06:55:26,361 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 240.5ms TimeCoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:55:26,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90769 states. [2021-06-05 06:55:27,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90769 to 68117. [2021-06-05 06:55:27,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68117 states, 68116 states have (on average 2.9315726114275646) internal successors, (199687), 68116 states have internal predecessors, (199687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:55:27,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68117 states to 68117 states and 199687 transitions. [2021-06-05 06:55:27,831 INFO L78 Accepts]: Start accepts. Automaton has 68117 states and 199687 transitions. Word has length 40 [2021-06-05 06:55:27,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:55:27,831 INFO L482 AbstractCegarLoop]: Abstraction has 68117 states and 199687 transitions. [2021-06-05 06:55:27,831 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 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 06:55:27,832 INFO L276 IsEmpty]: Start isEmpty. Operand 68117 states and 199687 transitions. [2021-06-05 06:55:27,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 06:55:27,929 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:55:27,929 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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 06:55:28,129 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:55:28,130 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:55:28,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:55:28,130 INFO L82 PathProgramCache]: Analyzing trace with hash 2073309766, now seen corresponding path program 126 times [2021-06-05 06:55:28,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:55:28,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348130853] [2021-06-05 06:55:28,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:55:28,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:55:28,275 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:55:28,275 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:55:28,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348130853] [2021-06-05 06:55:28,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348130853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:55:28,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864741633] [2021-06-05 06:55:28,275 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 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:55:28,313 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:55:28,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:55:28,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 06:55:28,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:55:28,574 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:55:28,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864741633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:55:28,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:55:28,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-06-05 06:55:28,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441623434] [2021-06-05 06:55:28,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 06:55:28,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:55:28,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 06:55:28,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:55:28,578 INFO L87 Difference]: Start difference. First operand 68117 states and 199687 transitions. Second operand has 25 states, 25 states have (on average 2.92) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:55:29,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:55:29,869 INFO L93 Difference]: Finished difference Result 92902 states and 271948 transitions. [2021-06-05 06:55:29,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 06:55:29,869 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 06:55:29,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:55:30,022 INFO L225 Difference]: With dead ends: 92902 [2021-06-05 06:55:30,022 INFO L226 Difference]: Without dead ends: 92828 [2021-06-05 06:55:30,022 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 581.8ms TimeCoverageRelationStatistics Valid=134, Invalid=1272, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 06:55:30,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92828 states. [2021-06-05 06:55:31,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92828 to 69669. [2021-06-05 06:55:31,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69669 states, 69668 states have (on average 2.9318338405006603) internal successors, (204255), 69668 states have internal predecessors, (204255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:55:31,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69669 states to 69669 states and 204255 transitions. [2021-06-05 06:55:31,483 INFO L78 Accepts]: Start accepts. Automaton has 69669 states and 204255 transitions. Word has length 40 [2021-06-05 06:55:31,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:55:31,483 INFO L482 AbstractCegarLoop]: Abstraction has 69669 states and 204255 transitions. [2021-06-05 06:55:31,483 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:55:31,483 INFO L276 IsEmpty]: Start isEmpty. Operand 69669 states and 204255 transitions. [2021-06-05 06:55:31,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 06:55:31,578 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:55:31,578 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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 06:55:31,779 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable199,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:55:31,779 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:55:31,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:55:31,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1408085314, now seen corresponding path program 127 times [2021-06-05 06:55:31,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:55:31,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690963361] [2021-06-05 06:55:31,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:55:31,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:55:31,944 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:55:31,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:55:31,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690963361] [2021-06-05 06:55:31,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690963361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:55:31,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651322337] [2021-06-05 06:55:31,944 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 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:55:31,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:55:31,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:55:31,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:55:32,171 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:55:32,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651322337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:55:32,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:55:32,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-05 06:55:32,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827491306] [2021-06-05 06:55:32,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:55:32,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:55:32,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:55:32,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:55:32,172 INFO L87 Difference]: Start difference. First operand 69669 states and 204255 transitions. Second operand has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 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 06:55:33,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:55:33,191 INFO L93 Difference]: Finished difference Result 95491 states and 279885 transitions. [2021-06-05 06:55:33,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 06:55:33,191 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 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 40 [2021-06-05 06:55:33,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:55:33,353 INFO L225 Difference]: With dead ends: 95491 [2021-06-05 06:55:33,353 INFO L226 Difference]: Without dead ends: 95385 [2021-06-05 06:55:33,353 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 320.8ms TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:55:33,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95385 states. [2021-06-05 06:55:34,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95385 to 72491. [2021-06-05 06:55:34,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72491 states, 72490 states have (on average 2.932487239619258) internal successors, (212576), 72490 states have internal predecessors, (212576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:55:34,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72491 states to 72491 states and 212576 transitions. [2021-06-05 06:55:34,886 INFO L78 Accepts]: Start accepts. Automaton has 72491 states and 212576 transitions. Word has length 40 [2021-06-05 06:55:34,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:55:34,886 INFO L482 AbstractCegarLoop]: Abstraction has 72491 states and 212576 transitions. [2021-06-05 06:55:34,886 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 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 06:55:34,887 INFO L276 IsEmpty]: Start isEmpty. Operand 72491 states and 212576 transitions. [2021-06-05 06:55:34,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 06:55:34,986 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:55:34,986 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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 06:55:35,186 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-06-05 06:55:35,187 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:55:35,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:55:35,187 INFO L82 PathProgramCache]: Analyzing trace with hash -346917946, now seen corresponding path program 128 times [2021-06-05 06:55:35,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:55:35,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549526712] [2021-06-05 06:55:35,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:55:35,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:55:35,304 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:55:35,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:55:35,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549526712] [2021-06-05 06:55:35,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549526712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:55:35,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734101087] [2021-06-05 06:55:35,305 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 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:55:35,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:55:35,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:55:35,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 06:55:35,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:55:35,522 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:55:35,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734101087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:55:35,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:55:35,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-06-05 06:55:35,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801562935] [2021-06-05 06:55:35,523 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 06:55:35,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:55:35,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 06:55:35,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:55:35,523 INFO L87 Difference]: Start difference. First operand 72491 states and 212576 transitions. Second operand has 25 states, 25 states have (on average 2.92) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:55:36,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:55:36,990 INFO L93 Difference]: Finished difference Result 100288 states and 293712 transitions. [2021-06-05 06:55:36,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 06:55:36,991 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 06:55:36,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:55:37,178 INFO L225 Difference]: With dead ends: 100288 [2021-06-05 06:55:37,178 INFO L226 Difference]: Without dead ends: 100151 [2021-06-05 06:55:37,178 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 523 ImplicationChecksByTransitivity, 651.3ms TimeCoverageRelationStatistics Valid=196, Invalid=1874, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 06:55:37,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100151 states. [2021-06-05 06:55:38,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100151 to 73759. [2021-06-05 06:55:38,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73759 states, 73758 states have (on average 2.9331597928360313) internal successors, (216344), 73758 states have internal predecessors, (216344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:55:38,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73759 states to 73759 states and 216344 transitions. [2021-06-05 06:55:38,839 INFO L78 Accepts]: Start accepts. Automaton has 73759 states and 216344 transitions. Word has length 40 [2021-06-05 06:55:38,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:55:38,839 INFO L482 AbstractCegarLoop]: Abstraction has 73759 states and 216344 transitions. [2021-06-05 06:55:38,839 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:55:38,839 INFO L276 IsEmpty]: Start isEmpty. Operand 73759 states and 216344 transitions. [2021-06-05 06:55:38,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 06:55:38,951 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:55:38,951 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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 06:55:39,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2021-06-05 06:55:39,151 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:55:39,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:55:39,152 INFO L82 PathProgramCache]: Analyzing trace with hash -2017252144, now seen corresponding path program 129 times [2021-06-05 06:55:39,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:55:39,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11864383] [2021-06-05 06:55:39,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:55:39,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:55:39,287 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:55:39,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:55:39,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11864383] [2021-06-05 06:55:39,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11864383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:55:39,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256338769] [2021-06-05 06:55:39,287 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 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:55:39,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:55:39,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:55:39,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:55:39,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:55:39,821 WARN L205 SmtUtils]: Spent 370.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2021-06-05 06:55:39,900 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:55:39,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256338769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:55:39,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:55:39,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 06:55:39,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721061647] [2021-06-05 06:55:39,901 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 06:55:39,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:55:39,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 06:55:39,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:55:39,901 INFO L87 Difference]: Start difference. First operand 73759 states and 216344 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:55:40,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:55:40,367 INFO L93 Difference]: Finished difference Result 78859 states and 230387 transitions. [2021-06-05 06:55:40,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 06:55:40,368 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 06:55:40,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:55:40,502 INFO L225 Difference]: With dead ends: 78859 [2021-06-05 06:55:40,502 INFO L226 Difference]: Without dead ends: 78785 [2021-06-05 06:55:40,502 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 641.9ms TimeCoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:55:40,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78785 states. [2021-06-05 06:55:41,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78785 to 75025. [2021-06-05 06:55:41,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75025 states, 75024 states have (on average 2.9336612284069097) internal successors, (220095), 75024 states have internal predecessors, (220095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:55:42,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75025 states to 75025 states and 220095 transitions. [2021-06-05 06:55:42,012 INFO L78 Accepts]: Start accepts. Automaton has 75025 states and 220095 transitions. Word has length 40 [2021-06-05 06:55:42,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:55:42,012 INFO L482 AbstractCegarLoop]: Abstraction has 75025 states and 220095 transitions. [2021-06-05 06:55:42,012 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:55:42,012 INFO L276 IsEmpty]: Start isEmpty. Operand 75025 states and 220095 transitions. [2021-06-05 06:55:42,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 06:55:42,115 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:55:42,115 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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 06:55:42,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2021-06-05 06:55:42,316 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:55:42,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:55:42,316 INFO L82 PathProgramCache]: Analyzing trace with hash -727268640, now seen corresponding path program 130 times [2021-06-05 06:55:42,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:55:42,316 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331490166] [2021-06-05 06:55:42,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:55:42,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:55:42,440 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:55:42,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:55:42,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331490166] [2021-06-05 06:55:42,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331490166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:55:42,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515278277] [2021-06-05 06:55:42,440 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 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:55:42,464 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:55:42,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:55:42,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:55:42,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:55:42,661 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:55:42,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515278277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:55:42,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:55:42,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2021-06-05 06:55:42,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637385176] [2021-06-05 06:55:42,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:55:42,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:55:42,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:55:42,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:55:42,662 INFO L87 Difference]: Start difference. First operand 75025 states and 220095 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:55:43,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:55:43,521 INFO L93 Difference]: Finished difference Result 80009 states and 233828 transitions. [2021-06-05 06:55:43,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 06:55:43,521 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 06:55:43,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:55:43,665 INFO L225 Difference]: With dead ends: 80009 [2021-06-05 06:55:43,665 INFO L226 Difference]: Without dead ends: 79935 [2021-06-05 06:55:43,665 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 248.2ms TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:55:43,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79935 states. [2021-06-05 06:55:44,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79935 to 74919. [2021-06-05 06:55:45,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74919 states, 74918 states have (on average 2.934087936143517) internal successors, (219816), 74918 states have internal predecessors, (219816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:55:45,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74919 states to 74919 states and 219816 transitions. [2021-06-05 06:55:45,207 INFO L78 Accepts]: Start accepts. Automaton has 74919 states and 219816 transitions. Word has length 40 [2021-06-05 06:55:45,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:55:45,207 INFO L482 AbstractCegarLoop]: Abstraction has 74919 states and 219816 transitions. [2021-06-05 06:55:45,207 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:55:45,207 INFO L276 IsEmpty]: Start isEmpty. Operand 74919 states and 219816 transitions. [2021-06-05 06:55:45,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 06:55:45,316 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:55:45,316 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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 06:55:45,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:55:45,516 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:55:45,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:55:45,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1155007878, now seen corresponding path program 131 times [2021-06-05 06:55:45,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:55:45,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874125242] [2021-06-05 06:55:45,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:55:45,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:55:45,639 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:55:45,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:55:45,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874125242] [2021-06-05 06:55:45,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874125242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:55:45,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224866747] [2021-06-05 06:55:45,640 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 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:55:45,665 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:55:45,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:55:45,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:55:45,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:55:45,847 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:55:45,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224866747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:55:45,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:55:45,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2021-06-05 06:55:45,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709430329] [2021-06-05 06:55:45,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:55:45,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:55:45,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:55:45,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:55:45,849 INFO L87 Difference]: Start difference. First operand 74919 states and 219816 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:55:46,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:55:46,730 INFO L93 Difference]: Finished difference Result 81553 states and 238414 transitions. [2021-06-05 06:55:46,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 06:55:46,730 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 06:55:46,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:55:46,870 INFO L225 Difference]: With dead ends: 81553 [2021-06-05 06:55:46,870 INFO L226 Difference]: Without dead ends: 81439 [2021-06-05 06:55:46,871 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 264.8ms TimeCoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:55:46,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81439 states. [2021-06-05 06:55:48,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81439 to 77163. [2021-06-05 06:55:48,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77163 states, 77162 states have (on average 2.93608252766906) internal successors, (226554), 77162 states have internal predecessors, (226554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:55:48,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77163 states to 77163 states and 226554 transitions. [2021-06-05 06:55:48,388 INFO L78 Accepts]: Start accepts. Automaton has 77163 states and 226554 transitions. Word has length 40 [2021-06-05 06:55:48,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:55:48,388 INFO L482 AbstractCegarLoop]: Abstraction has 77163 states and 226554 transitions. [2021-06-05 06:55:48,388 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:55:48,388 INFO L276 IsEmpty]: Start isEmpty. Operand 77163 states and 226554 transitions. [2021-06-05 06:55:48,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 06:55:48,498 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:55:48,498 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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 06:55:48,698 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable209 [2021-06-05 06:55:48,698 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:55:48,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:55:48,699 INFO L82 PathProgramCache]: Analyzing trace with hash -862357216, now seen corresponding path program 132 times [2021-06-05 06:55:48,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:55:48,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833019764] [2021-06-05 06:55:48,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:55:48,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:55:48,814 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:55:48,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:55:48,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833019764] [2021-06-05 06:55:48,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833019764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:55:48,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31122941] [2021-06-05 06:55:48,815 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 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:55:48,861 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 06:55:48,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:55:48,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:55:48,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:55:49,052 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:55:49,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31122941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:55:49,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:55:49,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2021-06-05 06:55:49,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858323756] [2021-06-05 06:55:49,053 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:55:49,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:55:49,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:55:49,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:55:49,053 INFO L87 Difference]: Start difference. First operand 77163 states and 226554 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:55:50,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:55:50,094 INFO L93 Difference]: Finished difference Result 86206 states and 252453 transitions. [2021-06-05 06:55:50,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 06:55:50,094 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 06:55:50,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:55:50,242 INFO L225 Difference]: With dead ends: 86206 [2021-06-05 06:55:50,242 INFO L226 Difference]: Without dead ends: 86116 [2021-06-05 06:55:50,242 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 296.9ms TimeCoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:55:50,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86116 states. [2021-06-05 06:55:51,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86116 to 81055. [2021-06-05 06:55:51,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81055 states, 81054 states have (on average 2.940928270042194) internal successors, (238374), 81054 states have internal predecessors, (238374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:55:51,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81055 states to 81055 states and 238374 transitions. [2021-06-05 06:55:51,743 INFO L78 Accepts]: Start accepts. Automaton has 81055 states and 238374 transitions. Word has length 40 [2021-06-05 06:55:51,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:55:51,743 INFO L482 AbstractCegarLoop]: Abstraction has 81055 states and 238374 transitions. [2021-06-05 06:55:51,743 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:55:51,743 INFO L276 IsEmpty]: Start isEmpty. Operand 81055 states and 238374 transitions. [2021-06-05 06:55:51,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 06:55:51,857 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:55:51,857 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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 06:55:52,057 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-06-05 06:55:52,057 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:55:52,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:55:52,057 INFO L82 PathProgramCache]: Analyzing trace with hash -981440228, now seen corresponding path program 133 times [2021-06-05 06:55:52,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:55:52,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043182381] [2021-06-05 06:55:52,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:55:52,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:55:52,165 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 06:55:52,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:55:52,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043182381] [2021-06-05 06:55:52,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043182381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:55:52,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993675682] [2021-06-05 06:55:52,166 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 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:55:52,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:55:52,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:55:52,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:55:52,382 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:55:52,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993675682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:55:52,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:55:52,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2021-06-05 06:55:52,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167991119] [2021-06-05 06:55:52,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:55:52,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:55:52,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:55:52,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:55:52,383 INFO L87 Difference]: Start difference. First operand 81055 states and 238374 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:55:53,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:55:53,567 INFO L93 Difference]: Finished difference Result 86179 states and 252372 transitions. [2021-06-05 06:55:53,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 06:55:53,567 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 06:55:53,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:55:53,780 INFO L225 Difference]: With dead ends: 86179 [2021-06-05 06:55:53,780 INFO L226 Difference]: Without dead ends: 86059 [2021-06-05 06:55:53,780 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 291.8ms TimeCoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:55:53,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86059 states. [2021-06-05 06:55:55,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86059 to 80643. [2021-06-05 06:55:55,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80643 states, 80642 states have (on average 2.9357158800624985) internal successors, (236742), 80642 states have internal predecessors, (236742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:55:55,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80643 states to 80643 states and 236742 transitions. [2021-06-05 06:55:55,490 INFO L78 Accepts]: Start accepts. Automaton has 80643 states and 236742 transitions. Word has length 40 [2021-06-05 06:55:55,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:55:55,490 INFO L482 AbstractCegarLoop]: Abstraction has 80643 states and 236742 transitions. [2021-06-05 06:55:55,491 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:55:55,491 INFO L276 IsEmpty]: Start isEmpty. Operand 80643 states and 236742 transitions. [2021-06-05 06:55:55,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 06:55:55,604 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:55:55,604 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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 06:55:55,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-06-05 06:55:55,804 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:55:55,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:55:55,805 INFO L82 PathProgramCache]: Analyzing trace with hash -837152646, now seen corresponding path program 134 times [2021-06-05 06:55:55,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:55:55,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311869438] [2021-06-05 06:55:55,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:55:55,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:55:55,919 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:55:55,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:55:55,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311869438] [2021-06-05 06:55:55,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311869438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:55:55,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985349150] [2021-06-05 06:55:55,919 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 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:55:55,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:55:55,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:55:55,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 06:55:55,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:55:56,147 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:55:56,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985349150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:55:56,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:55:56,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-06-05 06:55:56,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382603445] [2021-06-05 06:55:56,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 06:55:56,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:55:56,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 06:55:56,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:55:56,148 INFO L87 Difference]: Start difference. First operand 80643 states and 236742 transitions. Second operand has 25 states, 25 states have (on average 2.92) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:55:56,715 WARN L205 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 12 [2021-06-05 06:55:57,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:55:57,424 INFO L93 Difference]: Finished difference Result 84857 states and 247966 transitions. [2021-06-05 06:55:57,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 06:55:57,424 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 06:55:57,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:55:57,574 INFO L225 Difference]: With dead ends: 84857 [2021-06-05 06:55:57,574 INFO L226 Difference]: Without dead ends: 84733 [2021-06-05 06:55:57,575 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 864.5ms TimeCoverageRelationStatistics Valid=150, Invalid=1332, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 06:55:57,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84733 states. [2021-06-05 06:55:58,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84733 to 77769. [2021-06-05 06:55:58,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77769 states, 77768 states have (on average 2.9353075815245346) internal successors, (228273), 77768 states have internal predecessors, (228273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:55:59,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77769 states to 77769 states and 228273 transitions. [2021-06-05 06:55:59,100 INFO L78 Accepts]: Start accepts. Automaton has 77769 states and 228273 transitions. Word has length 40 [2021-06-05 06:55:59,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:55:59,100 INFO L482 AbstractCegarLoop]: Abstraction has 77769 states and 228273 transitions. [2021-06-05 06:55:59,100 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:55:59,100 INFO L276 IsEmpty]: Start isEmpty. Operand 77769 states and 228273 transitions. [2021-06-05 06:55:59,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 06:55:59,211 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:55:59,211 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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 06:55:59,411 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2021-06-05 06:55:59,411 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:55:59,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:55:59,411 INFO L82 PathProgramCache]: Analyzing trace with hash 762977632, now seen corresponding path program 135 times [2021-06-05 06:55:59,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:55:59,412 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623619608] [2021-06-05 06:55:59,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:55:59,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:55:59,559 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:55:59,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:55:59,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623619608] [2021-06-05 06:55:59,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623619608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:55:59,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81044043] [2021-06-05 06:55:59,560 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 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:55:59,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:55:59,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:55:59,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:55:59,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:56:00,020 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 17 [2021-06-05 06:56:00,101 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:56:00,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81044043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:56:00,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:56:00,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 06:56:00,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944965839] [2021-06-05 06:56:00,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 06:56:00,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:56:00,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 06:56:00,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-06-05 06:56:00,103 INFO L87 Difference]: Start difference. First operand 77769 states and 228273 transitions. Second operand has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 21 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:00,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:56:00,619 INFO L93 Difference]: Finished difference Result 81477 states and 238950 transitions. [2021-06-05 06:56:00,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 06:56:00,619 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 21 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 06:56:00,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:56:00,763 INFO L225 Difference]: With dead ends: 81477 [2021-06-05 06:56:00,764 INFO L226 Difference]: Without dead ends: 81403 [2021-06-05 06:56:00,764 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 304.0ms TimeCoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:56:00,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81403 states. [2021-06-05 06:56:02,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81403 to 81021. [2021-06-05 06:56:02,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81021 states, 81020 states have (on average 2.936571216983461) internal successors, (237921), 81020 states have internal predecessors, (237921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:02,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81021 states to 81021 states and 237921 transitions. [2021-06-05 06:56:02,293 INFO L78 Accepts]: Start accepts. Automaton has 81021 states and 237921 transitions. Word has length 40 [2021-06-05 06:56:02,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:56:02,293 INFO L482 AbstractCegarLoop]: Abstraction has 81021 states and 237921 transitions. [2021-06-05 06:56:02,293 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 21 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:02,293 INFO L276 IsEmpty]: Start isEmpty. Operand 81021 states and 237921 transitions. [2021-06-05 06:56:02,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 06:56:02,406 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:56:02,406 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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 06:56:02,606 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2021-06-05 06:56:02,607 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:56:02,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:56:02,607 INFO L82 PathProgramCache]: Analyzing trace with hash 1088400518, now seen corresponding path program 136 times [2021-06-05 06:56:02,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:56:02,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539194451] [2021-06-05 06:56:02,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:56:02,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:56:02,720 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:56:02,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:56:02,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539194451] [2021-06-05 06:56:02,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539194451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:56:02,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314751593] [2021-06-05 06:56:02,720 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 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:56:02,744 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:56:02,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:56:02,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:56:02,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:56:03,193 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:56:03,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314751593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:56:03,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:56:03,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-06-05 06:56:03,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145052904] [2021-06-05 06:56:03,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 06:56:03,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:56:03,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 06:56:03,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:56:03,194 INFO L87 Difference]: Start difference. First operand 81021 states and 237921 transitions. Second operand has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:03,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:56:03,698 INFO L93 Difference]: Finished difference Result 83181 states and 243998 transitions. [2021-06-05 06:56:03,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 06:56:03,698 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 06:56:03,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:56:03,848 INFO L225 Difference]: With dead ends: 83181 [2021-06-05 06:56:03,848 INFO L226 Difference]: Without dead ends: 83107 [2021-06-05 06:56:03,848 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 268.3ms TimeCoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:56:03,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83107 states. [2021-06-05 06:56:05,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83107 to 79989. [2021-06-05 06:56:05,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79989 states, 79988 states have (on average 2.937803170475571) internal successors, (234989), 79988 states have internal predecessors, (234989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:05,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79989 states to 79989 states and 234989 transitions. [2021-06-05 06:56:05,354 INFO L78 Accepts]: Start accepts. Automaton has 79989 states and 234989 transitions. Word has length 40 [2021-06-05 06:56:05,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:56:05,354 INFO L482 AbstractCegarLoop]: Abstraction has 79989 states and 234989 transitions. [2021-06-05 06:56:05,354 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:05,354 INFO L276 IsEmpty]: Start isEmpty. Operand 79989 states and 234989 transitions. [2021-06-05 06:56:05,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 06:56:05,473 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:56:05,474 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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 06:56:05,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:56:05,674 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:56:05,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:56:05,674 INFO L82 PathProgramCache]: Analyzing trace with hash 1493177376, now seen corresponding path program 137 times [2021-06-05 06:56:05,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:56:05,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590662488] [2021-06-05 06:56:05,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:56:05,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:56:05,766 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:56:05,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:56:05,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590662488] [2021-06-05 06:56:05,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590662488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:56:05,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602586606] [2021-06-05 06:56:05,767 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 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:56:05,791 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 06:56:05,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:56:05,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:56:05,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:56:06,148 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 15 [2021-06-05 06:56:06,228 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:56:06,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602586606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:56:06,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:56:06,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-06-05 06:56:06,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544293536] [2021-06-05 06:56:06,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:56:06,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:56:06,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:56:06,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:56:06,229 INFO L87 Difference]: Start difference. First operand 79989 states and 234989 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:06,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:56:06,695 INFO L93 Difference]: Finished difference Result 83703 states and 245487 transitions. [2021-06-05 06:56:06,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 06:56:06,696 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 06:56:06,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:56:06,852 INFO L225 Difference]: With dead ends: 83703 [2021-06-05 06:56:06,852 INFO L226 Difference]: Without dead ends: 83589 [2021-06-05 06:56:06,852 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 249.3ms TimeCoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:56:06,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83589 states. [2021-06-05 06:56:08,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83589 to 79601. [2021-06-05 06:56:08,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79601 states, 79600 states have (on average 2.9393090452261306) internal successors, (233969), 79600 states have internal predecessors, (233969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:08,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79601 states to 79601 states and 233969 transitions. [2021-06-05 06:56:08,334 INFO L78 Accepts]: Start accepts. Automaton has 79601 states and 233969 transitions. Word has length 40 [2021-06-05 06:56:08,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:56:08,334 INFO L482 AbstractCegarLoop]: Abstraction has 79601 states and 233969 transitions. [2021-06-05 06:56:08,334 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:08,334 INFO L276 IsEmpty]: Start isEmpty. Operand 79601 states and 233969 transitions. [2021-06-05 06:56:08,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 06:56:08,444 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:56:08,444 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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 06:56:08,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-06-05 06:56:08,644 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:56:08,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:56:08,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1063230778, now seen corresponding path program 138 times [2021-06-05 06:56:08,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:56:08,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267669298] [2021-06-05 06:56:08,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:56:08,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:56:08,735 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:56:08,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:56:08,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267669298] [2021-06-05 06:56:08,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267669298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:56:08,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612174244] [2021-06-05 06:56:08,736 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 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:56:08,763 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 06:56:08,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:56:08,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:56:08,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:56:08,951 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:56:08,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612174244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:56:08,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:56:08,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-06-05 06:56:08,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479107969] [2021-06-05 06:56:08,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:56:08,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:56:08,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:56:08,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:56:08,952 INFO L87 Difference]: Start difference. First operand 79601 states and 233969 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:09,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:56:09,724 INFO L93 Difference]: Finished difference Result 84051 states and 247089 transitions. [2021-06-05 06:56:09,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 06:56:09,725 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 06:56:09,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:56:09,870 INFO L225 Difference]: With dead ends: 84051 [2021-06-05 06:56:09,870 INFO L226 Difference]: Without dead ends: 83961 [2021-06-05 06:56:09,870 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 253.2ms TimeCoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:56:09,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83961 states. [2021-06-05 06:56:11,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83961 to 82811. [2021-06-05 06:56:11,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82811 states, 82810 states have (on average 2.943557541359739) internal successors, (243756), 82810 states have internal predecessors, (243756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:11,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82811 states to 82811 states and 243756 transitions. [2021-06-05 06:56:11,342 INFO L78 Accepts]: Start accepts. Automaton has 82811 states and 243756 transitions. Word has length 40 [2021-06-05 06:56:11,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:56:11,342 INFO L482 AbstractCegarLoop]: Abstraction has 82811 states and 243756 transitions. [2021-06-05 06:56:11,342 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:11,342 INFO L276 IsEmpty]: Start isEmpty. Operand 82811 states and 243756 transitions. [2021-06-05 06:56:11,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 06:56:11,461 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:56:11,461 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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 06:56:11,661 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2021-06-05 06:56:11,662 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:56:11,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:56:11,662 INFO L82 PathProgramCache]: Analyzing trace with hash -1182313790, now seen corresponding path program 139 times [2021-06-05 06:56:11,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:56:11,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801829694] [2021-06-05 06:56:11,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:56:11,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:56:11,751 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 06:56:11,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:56:11,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801829694] [2021-06-05 06:56:11,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801829694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:56:11,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084457685] [2021-06-05 06:56:11,752 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 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:56:11,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:56:11,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:56:11,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:56:11,998 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:56:11,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084457685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:56:11,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:56:11,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-06-05 06:56:11,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004837068] [2021-06-05 06:56:11,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:56:11,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:56:11,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:56:11,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:56:11,999 INFO L87 Difference]: Start difference. First operand 82811 states and 243756 transitions. Second operand has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:12,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:56:12,850 INFO L93 Difference]: Finished difference Result 84018 states and 247010 transitions. [2021-06-05 06:56:12,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 06:56:12,851 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 06:56:12,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:56:12,994 INFO L225 Difference]: With dead ends: 84018 [2021-06-05 06:56:12,994 INFO L226 Difference]: Without dead ends: 83902 [2021-06-05 06:56:12,995 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 253.9ms TimeCoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:56:13,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83902 states. [2021-06-05 06:56:14,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83902 to 82781. [2021-06-05 06:56:14,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82781 states, 82780 states have (on average 2.9422928243537085) internal successors, (243563), 82780 states have internal predecessors, (243563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:14,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82781 states to 82781 states and 243563 transitions. [2021-06-05 06:56:14,518 INFO L78 Accepts]: Start accepts. Automaton has 82781 states and 243563 transitions. Word has length 40 [2021-06-05 06:56:14,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:56:14,518 INFO L482 AbstractCegarLoop]: Abstraction has 82781 states and 243563 transitions. [2021-06-05 06:56:14,518 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:14,518 INFO L276 IsEmpty]: Start isEmpty. Operand 82781 states and 243563 transitions. [2021-06-05 06:56:14,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 06:56:14,639 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:56:14,639 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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 06:56:14,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:56:14,841 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:56:14,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:56:14,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1038026208, now seen corresponding path program 140 times [2021-06-05 06:56:14,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:56:14,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158311934] [2021-06-05 06:56:14,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:56:14,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:56:14,953 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 06:56:14,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:56:14,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158311934] [2021-06-05 06:56:14,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158311934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:56:14,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144349904] [2021-06-05 06:56:14,954 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 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:56:14,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:56:14,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:56:14,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 06:56:14,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:56:15,178 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:56:15,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144349904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:56:15,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:56:15,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-06-05 06:56:15,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597459574] [2021-06-05 06:56:15,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 06:56:15,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:56:15,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 06:56:15,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=494, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:56:15,179 INFO L87 Difference]: Start difference. First operand 82781 states and 243563 transitions. Second operand has 24 states, 24 states have (on average 3.0) internal successors, (72), 24 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:15,845 WARN L205 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 13 [2021-06-05 06:56:16,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:56:16,379 INFO L93 Difference]: Finished difference Result 83683 states and 245710 transitions. [2021-06-05 06:56:16,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 06:56:16,380 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.0) internal successors, (72), 24 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 06:56:16,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:56:16,527 INFO L225 Difference]: With dead ends: 83683 [2021-06-05 06:56:16,528 INFO L226 Difference]: Without dead ends: 83552 [2021-06-05 06:56:16,528 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 825.0ms TimeCoverageRelationStatistics Valid=137, Invalid=1195, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 06:56:16,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83552 states. [2021-06-05 06:56:17,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83552 to 82767. [2021-06-05 06:56:17,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82767 states, 82766 states have (on average 2.9417876905975886) internal successors, (243480), 82766 states have internal predecessors, (243480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:18,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82767 states to 82767 states and 243480 transitions. [2021-06-05 06:56:18,076 INFO L78 Accepts]: Start accepts. Automaton has 82767 states and 243480 transitions. Word has length 40 [2021-06-05 06:56:18,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:56:18,076 INFO L482 AbstractCegarLoop]: Abstraction has 82767 states and 243480 transitions. [2021-06-05 06:56:18,076 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 3.0) internal successors, (72), 24 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:18,076 INFO L276 IsEmpty]: Start isEmpty. Operand 82767 states and 243480 transitions. [2021-06-05 06:56:18,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 06:56:18,196 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:56:18,197 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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 06:56:18,397 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable227 [2021-06-05 06:56:18,397 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:56:18,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:56:18,398 INFO L82 PathProgramCache]: Analyzing trace with hash -38591008, now seen corresponding path program 141 times [2021-06-05 06:56:18,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:56:18,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487938427] [2021-06-05 06:56:18,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:56:18,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:56:18,524 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:56:18,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:56:18,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487938427] [2021-06-05 06:56:18,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487938427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:56:18,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66308499] [2021-06-05 06:56:18,524 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 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:56:18,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 06:56:18,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:56:18,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 06:56:18,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:56:19,142 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:56:19,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66308499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:56:19,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:56:19,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2021-06-05 06:56:19,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118047914] [2021-06-05 06:56:19,143 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:56:19,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:56:19,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:56:19,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:56:19,143 INFO L87 Difference]: Start difference. First operand 82767 states and 243480 transitions. Second operand has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:19,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:56:19,840 INFO L93 Difference]: Finished difference Result 83411 states and 244946 transitions. [2021-06-05 06:56:19,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 06:56:19,840 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 06:56:19,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:56:19,981 INFO L225 Difference]: With dead ends: 83411 [2021-06-05 06:56:19,981 INFO L226 Difference]: Without dead ends: 83281 [2021-06-05 06:56:19,981 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 783.6ms TimeCoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2021-06-05 06:56:20,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83281 states. [2021-06-05 06:56:21,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83281 to 79371. [2021-06-05 06:56:21,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79371 states, 79370 states have (on average 2.9420435932972158) internal successors, (233510), 79370 states have internal predecessors, (233510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:21,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79371 states to 79371 states and 233510 transitions. [2021-06-05 06:56:21,493 INFO L78 Accepts]: Start accepts. Automaton has 79371 states and 233510 transitions. Word has length 40 [2021-06-05 06:56:21,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:56:21,493 INFO L482 AbstractCegarLoop]: Abstraction has 79371 states and 233510 transitions. [2021-06-05 06:56:21,494 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:21,494 INFO L276 IsEmpty]: Start isEmpty. Operand 79371 states and 233510 transitions. [2021-06-05 06:56:21,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 06:56:21,604 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:56:21,604 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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 06:56:21,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:56:21,805 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:56:21,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:56:21,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1856068912, now seen corresponding path program 142 times [2021-06-05 06:56:21,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:56:21,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378850987] [2021-06-05 06:56:21,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:56:21,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:56:21,952 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:56:21,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:56:21,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378850987] [2021-06-05 06:56:21,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378850987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:56:21,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594121379] [2021-06-05 06:56:21,952 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 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:56:21,978 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:56:21,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:56:21,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:56:21,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:56:22,437 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:56:22,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594121379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:56:22,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:56:22,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 06:56:22,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962473263] [2021-06-05 06:56:22,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:56:22,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:56:22,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:56:22,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:56:22,438 INFO L87 Difference]: Start difference. First operand 79371 states and 233510 transitions. Second operand has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:22,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:56:22,984 INFO L93 Difference]: Finished difference Result 87077 states and 255818 transitions. [2021-06-05 06:56:22,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 06:56:22,985 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 06:56:22,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:56:23,148 INFO L225 Difference]: With dead ends: 87077 [2021-06-05 06:56:23,149 INFO L226 Difference]: Without dead ends: 86965 [2021-06-05 06:56:23,149 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 535.5ms TimeCoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:56:23,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86965 states. [2021-06-05 06:56:24,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86965 to 86453. [2021-06-05 06:56:24,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86453 states, 86452 states have (on average 2.9423379447554714) internal successors, (254371), 86452 states have internal predecessors, (254371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:25,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86453 states to 86453 states and 254371 transitions. [2021-06-05 06:56:25,185 INFO L78 Accepts]: Start accepts. Automaton has 86453 states and 254371 transitions. Word has length 40 [2021-06-05 06:56:25,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:56:25,185 INFO L482 AbstractCegarLoop]: Abstraction has 86453 states and 254371 transitions. [2021-06-05 06:56:25,185 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:25,185 INFO L276 IsEmpty]: Start isEmpty. Operand 86453 states and 254371 transitions. [2021-06-05 06:56:25,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 06:56:25,339 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:56:25,339 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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 06:56:25,539 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:56:25,540 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:56:25,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:56:25,540 INFO L82 PathProgramCache]: Analyzing trace with hash 870160672, now seen corresponding path program 143 times [2021-06-05 06:56:25,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:56:25,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311840376] [2021-06-05 06:56:25,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:56:25,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:56:25,656 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:56:25,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:56:25,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311840376] [2021-06-05 06:56:25,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311840376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:56:25,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308088473] [2021-06-05 06:56:25,656 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 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:56:25,681 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:56:25,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:56:25,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:56:25,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:56:25,927 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:56:25,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308088473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:56:25,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:56:25,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-06-05 06:56:25,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409679695] [2021-06-05 06:56:25,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 06:56:25,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:56:25,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 06:56:25,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-06-05 06:56:25,928 INFO L87 Difference]: Start difference. First operand 86453 states and 254371 transitions. Second operand has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:26,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:56:26,487 INFO L93 Difference]: Finished difference Result 91999 states and 270405 transitions. [2021-06-05 06:56:26,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 06:56:26,488 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 06:56:26,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:56:26,654 INFO L225 Difference]: With dead ends: 91999 [2021-06-05 06:56:26,654 INFO L226 Difference]: Without dead ends: 91867 [2021-06-05 06:56:26,654 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 284.2ms TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:56:26,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91867 states. [2021-06-05 06:56:28,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91867 to 87283. [2021-06-05 06:56:28,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87283 states, 87282 states have (on average 2.9414770513966224) internal successors, (256738), 87282 states have internal predecessors, (256738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:28,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87283 states to 87283 states and 256738 transitions. [2021-06-05 06:56:28,646 INFO L78 Accepts]: Start accepts. Automaton has 87283 states and 256738 transitions. Word has length 40 [2021-06-05 06:56:28,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:56:28,646 INFO L482 AbstractCegarLoop]: Abstraction has 87283 states and 256738 transitions. [2021-06-05 06:56:28,646 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:28,646 INFO L276 IsEmpty]: Start isEmpty. Operand 87283 states and 256738 transitions. [2021-06-05 06:56:28,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 06:56:28,758 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:56:28,758 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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 06:56:28,959 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2021-06-05 06:56:28,959 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:56:28,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:56:28,959 INFO L82 PathProgramCache]: Analyzing trace with hash -674180934, now seen corresponding path program 144 times [2021-06-05 06:56:28,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:56:28,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194749673] [2021-06-05 06:56:28,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:56:28,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:56:29,053 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:56:29,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:56:29,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194749673] [2021-06-05 06:56:29,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194749673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:56:29,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079560820] [2021-06-05 06:56:29,053 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 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:56:29,082 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:56:29,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:56:29,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:56:29,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:56:29,286 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:56:29,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079560820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:56:29,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:56:29,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2021-06-05 06:56:29,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187476587] [2021-06-05 06:56:29,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 06:56:29,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:56:29,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 06:56:29,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:56:29,287 INFO L87 Difference]: Start difference. First operand 87283 states and 256738 transitions. Second operand has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:29,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:56:29,759 INFO L93 Difference]: Finished difference Result 89515 states and 263099 transitions. [2021-06-05 06:56:29,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 06:56:29,760 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 06:56:29,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:56:29,914 INFO L225 Difference]: With dead ends: 89515 [2021-06-05 06:56:29,914 INFO L226 Difference]: Without dead ends: 89401 [2021-06-05 06:56:29,914 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 237.2ms TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:56:30,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89401 states. [2021-06-05 06:56:31,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89401 to 82167. [2021-06-05 06:56:31,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82167 states, 82166 states have (on average 2.9420198135481828) internal successors, (241734), 82166 states have internal predecessors, (241734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:31,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82167 states to 82167 states and 241734 transitions. [2021-06-05 06:56:31,887 INFO L78 Accepts]: Start accepts. Automaton has 82167 states and 241734 transitions. Word has length 40 [2021-06-05 06:56:31,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:56:31,888 INFO L482 AbstractCegarLoop]: Abstraction has 82167 states and 241734 transitions. [2021-06-05 06:56:31,888 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:31,888 INFO L276 IsEmpty]: Start isEmpty. Operand 82167 states and 241734 transitions. [2021-06-05 06:56:31,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 06:56:31,997 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:56:31,997 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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 06:56:32,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-06-05 06:56:32,198 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:56:32,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:56:32,198 INFO L82 PathProgramCache]: Analyzing trace with hash 1896894304, now seen corresponding path program 145 times [2021-06-05 06:56:32,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:56:32,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114051530] [2021-06-05 06:56:32,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:56:32,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:56:32,277 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:56:32,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:56:32,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114051530] [2021-06-05 06:56:32,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114051530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:56:32,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240420274] [2021-06-05 06:56:32,277 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:56:32,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:56:32,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:56:32,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:56:32,538 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:56:32,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240420274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:56:32,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:56:32,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 19 [2021-06-05 06:56:32,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573200153] [2021-06-05 06:56:32,538 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:56:32,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:56:32,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:56:32,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:56:32,538 INFO L87 Difference]: Start difference. First operand 82167 states and 241734 transitions. Second operand has 20 states, 20 states have (on average 3.3) internal successors, (66), 19 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:33,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:56:33,010 INFO L93 Difference]: Finished difference Result 88605 states and 260666 transitions. [2021-06-05 06:56:33,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 06:56:33,011 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 19 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 06:56:33,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:56:33,162 INFO L225 Difference]: With dead ends: 88605 [2021-06-05 06:56:33,162 INFO L226 Difference]: Without dead ends: 88523 [2021-06-05 06:56:33,162 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 243.4ms TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-06-05 06:56:33,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88523 states. [2021-06-05 06:56:34,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88523 to 87987. [2021-06-05 06:56:34,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87987 states, 87986 states have (on average 2.944263860159571) internal successors, (259054), 87986 states have internal predecessors, (259054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:35,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87987 states to 87987 states and 259054 transitions. [2021-06-05 06:56:35,165 INFO L78 Accepts]: Start accepts. Automaton has 87987 states and 259054 transitions. Word has length 40 [2021-06-05 06:56:35,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:56:35,165 INFO L482 AbstractCegarLoop]: Abstraction has 87987 states and 259054 transitions. [2021-06-05 06:56:35,165 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 19 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:35,165 INFO L276 IsEmpty]: Start isEmpty. Operand 87987 states and 259054 transitions. [2021-06-05 06:56:35,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 06:56:35,287 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:56:35,287 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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 06:56:35,487 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237 [2021-06-05 06:56:35,488 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:56:35,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:56:35,488 INFO L82 PathProgramCache]: Analyzing trace with hash 1777811292, now seen corresponding path program 146 times [2021-06-05 06:56:35,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:56:35,488 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995988487] [2021-06-05 06:56:35,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:56:35,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:56:35,566 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:56:35,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:56:35,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995988487] [2021-06-05 06:56:35,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995988487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:56:35,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194032888] [2021-06-05 06:56:35,567 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 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:56:35,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:56:35,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:56:35,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:56:35,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:56:35,788 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:56:35,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194032888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:56:35,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:56:35,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 19 [2021-06-05 06:56:35,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116801936] [2021-06-05 06:56:35,789 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:56:35,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:56:35,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:56:35,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:56:35,789 INFO L87 Difference]: Start difference. First operand 87987 states and 259054 transitions. Second operand has 20 states, 20 states have (on average 3.3) internal successors, (66), 19 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:36,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:56:36,265 INFO L93 Difference]: Finished difference Result 88582 states and 260614 transitions. [2021-06-05 06:56:36,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 06:56:36,265 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 19 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 06:56:36,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:56:36,418 INFO L225 Difference]: With dead ends: 88582 [2021-06-05 06:56:36,419 INFO L226 Difference]: Without dead ends: 88470 [2021-06-05 06:56:36,419 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 216.0ms TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-06-05 06:56:36,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88470 states. [2021-06-05 06:56:38,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88470 to 86373. [2021-06-05 06:56:38,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86373 states, 86372 states have (on average 2.942354003612282) internal successors, (254137), 86372 states have internal predecessors, (254137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:38,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86373 states to 86373 states and 254137 transitions. [2021-06-05 06:56:38,429 INFO L78 Accepts]: Start accepts. Automaton has 86373 states and 254137 transitions. Word has length 40 [2021-06-05 06:56:38,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:56:38,429 INFO L482 AbstractCegarLoop]: Abstraction has 86373 states and 254137 transitions. [2021-06-05 06:56:38,429 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 19 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:38,429 INFO L276 IsEmpty]: Start isEmpty. Operand 86373 states and 254137 transitions. [2021-06-05 06:56:38,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 06:56:38,543 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:56:38,543 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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 06:56:38,743 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2021-06-05 06:56:38,744 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:56:38,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:56:38,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1922098874, now seen corresponding path program 147 times [2021-06-05 06:56:38,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:56:38,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846725009] [2021-06-05 06:56:38,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:56:38,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:56:38,838 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 06:56:38,838 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:56:38,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846725009] [2021-06-05 06:56:38,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846725009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:56:38,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796150495] [2021-06-05 06:56:38,839 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 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:56:38,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 06:56:38,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:56:38,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 06:56:38,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:56:39,092 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:56:39,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796150495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:56:39,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:56:39,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 21 [2021-06-05 06:56:39,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590795622] [2021-06-05 06:56:39,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 06:56:39,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:56:39,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 06:56:39,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-06-05 06:56:39,093 INFO L87 Difference]: Start difference. First operand 86373 states and 254137 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:39,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:56:39,638 INFO L93 Difference]: Finished difference Result 88556 states and 260312 transitions. [2021-06-05 06:56:39,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 06:56:39,638 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 06:56:39,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:56:39,790 INFO L225 Difference]: With dead ends: 88556 [2021-06-05 06:56:39,790 INFO L226 Difference]: Without dead ends: 88432 [2021-06-05 06:56:39,790 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 320.2ms TimeCoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:56:40,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88432 states. [2021-06-05 06:56:41,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88432 to 87931. [2021-06-05 06:56:41,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87931 states, 87930 states have (on average 2.943682474695781) internal successors, (258838), 87930 states have internal predecessors, (258838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:41,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87931 states to 87931 states and 258838 transitions. [2021-06-05 06:56:41,696 INFO L78 Accepts]: Start accepts. Automaton has 87931 states and 258838 transitions. Word has length 40 [2021-06-05 06:56:41,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:56:41,696 INFO L482 AbstractCegarLoop]: Abstraction has 87931 states and 258838 transitions. [2021-06-05 06:56:41,697 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:41,697 INFO L276 IsEmpty]: Start isEmpty. Operand 87931 states and 258838 transitions. [2021-06-05 06:56:41,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 06:56:41,821 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:56:41,821 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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 06:56:42,021 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:56:42,021 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:56:42,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:56:42,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1373433222, now seen corresponding path program 148 times [2021-06-05 06:56:42,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:56:42,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52144582] [2021-06-05 06:56:42,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:56:42,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:56:42,134 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 06:56:42,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:56:42,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52144582] [2021-06-05 06:56:42,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52144582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:56:42,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077662551] [2021-06-05 06:56:42,134 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 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:56:42,157 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:56:42,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:56:42,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:56:42,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:56:42,436 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:56:42,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077662551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:56:42,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:56:42,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-06-05 06:56:42,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364875327] [2021-06-05 06:56:42,436 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 06:56:42,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:56:42,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 06:56:42,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-06-05 06:56:42,437 INFO L87 Difference]: Start difference. First operand 87931 states and 258838 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:42,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:56:42,967 INFO L93 Difference]: Finished difference Result 88462 states and 260034 transitions. [2021-06-05 06:56:42,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 06:56:42,967 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 06:56:42,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:56:43,509 INFO L225 Difference]: With dead ends: 88462 [2021-06-05 06:56:43,509 INFO L226 Difference]: Without dead ends: 88332 [2021-06-05 06:56:43,509 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 313.4ms TimeCoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:56:43,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88332 states. [2021-06-05 06:56:44,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88332 to 87915. [2021-06-05 06:56:44,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87915 states, 87914 states have (on average 2.9437177241395) internal successors, (258794), 87914 states have internal predecessors, (258794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:45,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87915 states to 87915 states and 258794 transitions. [2021-06-05 06:56:45,085 INFO L78 Accepts]: Start accepts. Automaton has 87915 states and 258794 transitions. Word has length 40 [2021-06-05 06:56:45,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:56:45,085 INFO L482 AbstractCegarLoop]: Abstraction has 87915 states and 258794 transitions. [2021-06-05 06:56:45,085 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:45,085 INFO L276 IsEmpty]: Start isEmpty. Operand 87915 states and 258794 transitions. [2021-06-05 06:56:45,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 06:56:45,211 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:56:45,212 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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 06:56:45,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2021-06-05 06:56:45,412 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:56:45,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:56:45,412 INFO L82 PathProgramCache]: Analyzing trace with hash 87314106, now seen corresponding path program 149 times [2021-06-05 06:56:45,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:56:45,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662464562] [2021-06-05 06:56:45,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:56:45,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:56:45,544 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:56:45,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:56:45,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662464562] [2021-06-05 06:56:45,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662464562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:56:45,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288684539] [2021-06-05 06:56:45,544 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 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:56:45,570 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 06:56:45,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:56:45,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:56:45,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:56:45,806 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:56:45,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288684539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:56:45,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:56:45,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 06:56:45,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456230727] [2021-06-05 06:56:45,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:56:45,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:56:45,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:56:45,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:56:45,807 INFO L87 Difference]: Start difference. First operand 87915 states and 258794 transitions. Second operand has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:46,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:56:46,268 INFO L93 Difference]: Finished difference Result 88421 states and 259928 transitions. [2021-06-05 06:56:46,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 06:56:46,268 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 06:56:46,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:56:46,897 INFO L225 Difference]: With dead ends: 88421 [2021-06-05 06:56:46,898 INFO L226 Difference]: Without dead ends: 88345 [2021-06-05 06:56:46,898 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 305.5ms TimeCoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:56:46,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88345 states. [2021-06-05 06:56:48,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88345 to 81541. [2021-06-05 06:56:48,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81541 states, 81540 states have (on average 2.944432180524896) internal successors, (240089), 81540 states have internal predecessors, (240089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:48,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81541 states to 81541 states and 240089 transitions. [2021-06-05 06:56:48,427 INFO L78 Accepts]: Start accepts. Automaton has 81541 states and 240089 transitions. Word has length 40 [2021-06-05 06:56:48,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:56:48,428 INFO L482 AbstractCegarLoop]: Abstraction has 81541 states and 240089 transitions. [2021-06-05 06:56:48,428 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:48,428 INFO L276 IsEmpty]: Start isEmpty. Operand 81541 states and 240089 transitions. [2021-06-05 06:56:48,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 06:56:48,548 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:56:48,548 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 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 06:56:48,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2021-06-05 06:56:48,749 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:56:48,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:56:48,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1013579830, now seen corresponding path program 150 times [2021-06-05 06:56:48,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:56:48,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289675962] [2021-06-05 06:56:48,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:56:48,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:56:48,791 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:56:48,791 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:56:48,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289675962] [2021-06-05 06:56:48,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289675962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:56:48,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090754560] [2021-06-05 06:56:48,791 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 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:56:48,817 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 06:56:48,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:56:48,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 06:56:48,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:56:48,901 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:56:48,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090754560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:56:48,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:56:48,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-05 06:56:48,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904997106] [2021-06-05 06:56:48,901 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:56:48,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:56:48,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:56:48,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:56:48,902 INFO L87 Difference]: Start difference. First operand 81541 states and 240089 transitions. Second operand has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:49,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:56:49,463 INFO L93 Difference]: Finished difference Result 106475 states and 313342 transitions. [2021-06-05 06:56:49,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 06:56:49,463 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 06:56:49,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:56:49,668 INFO L225 Difference]: With dead ends: 106475 [2021-06-05 06:56:49,668 INFO L226 Difference]: Without dead ends: 106475 [2021-06-05 06:56:49,668 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 136.6ms TimeCoverageRelationStatistics Valid=185, Invalid=415, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:56:50,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106475 states. [2021-06-05 06:56:51,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106475 to 82605. [2021-06-05 06:56:51,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82605 states, 82604 states have (on average 2.9431504527625783) internal successors, (243116), 82604 states have internal predecessors, (243116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:51,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82605 states to 82605 states and 243116 transitions. [2021-06-05 06:56:51,789 INFO L78 Accepts]: Start accepts. Automaton has 82605 states and 243116 transitions. Word has length 43 [2021-06-05 06:56:51,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:56:51,790 INFO L482 AbstractCegarLoop]: Abstraction has 82605 states and 243116 transitions. [2021-06-05 06:56:51,790 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:51,790 INFO L276 IsEmpty]: Start isEmpty. Operand 82605 states and 243116 transitions. [2021-06-05 06:56:51,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 06:56:51,908 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:56:51,908 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 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 06:56:52,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable247 [2021-06-05 06:56:52,108 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:56:52,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:56:52,109 INFO L82 PathProgramCache]: Analyzing trace with hash -22106132, now seen corresponding path program 151 times [2021-06-05 06:56:52,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:56:52,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234083288] [2021-06-05 06:56:52,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:56:52,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:56:52,150 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:56:52,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:56:52,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234083288] [2021-06-05 06:56:52,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234083288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:56:52,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798081166] [2021-06-05 06:56:52,151 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 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:56:52,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:56:52,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 06:56:52,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:56:52,278 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:56:52,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798081166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:56:52,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:56:52,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-05 06:56:52,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38807182] [2021-06-05 06:56:52,279 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:56:52,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:56:52,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:56:52,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:56:52,279 INFO L87 Difference]: Start difference. First operand 82605 states and 243116 transitions. Second operand has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:52,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:56:52,834 INFO L93 Difference]: Finished difference Result 128181 states and 373839 transitions. [2021-06-05 06:56:52,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 06:56:52,835 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 06:56:52,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:56:53,541 INFO L225 Difference]: With dead ends: 128181 [2021-06-05 06:56:53,541 INFO L226 Difference]: Without dead ends: 128094 [2021-06-05 06:56:53,542 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 132.1ms TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:56:53,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128094 states. [2021-06-05 06:56:55,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128094 to 82605. [2021-06-05 06:56:55,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82605 states, 82604 states have (on average 2.943017287298436) internal successors, (243105), 82604 states have internal predecessors, (243105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:55,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82605 states to 82605 states and 243105 transitions. [2021-06-05 06:56:55,408 INFO L78 Accepts]: Start accepts. Automaton has 82605 states and 243105 transitions. Word has length 43 [2021-06-05 06:56:55,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:56:55,408 INFO L482 AbstractCegarLoop]: Abstraction has 82605 states and 243105 transitions. [2021-06-05 06:56:55,408 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:55,408 INFO L276 IsEmpty]: Start isEmpty. Operand 82605 states and 243105 transitions. [2021-06-05 06:56:55,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 06:56:55,526 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:56:55,526 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 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 06:56:55,727 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable248,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:56:55,727 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:56:55,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:56:55,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1136369384, now seen corresponding path program 152 times [2021-06-05 06:56:55,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:56:55,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846967936] [2021-06-05 06:56:55,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:56:55,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:56:55,772 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:56:55,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:56:55,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846967936] [2021-06-05 06:56:55,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846967936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:56:55,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135063900] [2021-06-05 06:56:55,772 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 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:56:55,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:56:55,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:56:55,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 06:56:55,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:56:55,916 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:56:55,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135063900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:56:55,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:56:55,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 06:56:55,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399391772] [2021-06-05 06:56:55,916 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:56:55,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:56:55,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:56:55,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:56:55,917 INFO L87 Difference]: Start difference. First operand 82605 states and 243105 transitions. Second operand has 16 states, 16 states have (on average 3.75) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:57,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:56:57,538 INFO L93 Difference]: Finished difference Result 145421 states and 423333 transitions. [2021-06-05 06:56:57,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 06:56:57,538 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 06:56:57,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:56:57,813 INFO L225 Difference]: With dead ends: 145421 [2021-06-05 06:56:57,813 INFO L226 Difference]: Without dead ends: 145391 [2021-06-05 06:56:57,813 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1787 ImplicationChecksByTransitivity, 609.1ms TimeCoverageRelationStatistics Valid=1351, Invalid=3341, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 06:56:57,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145391 states. [2021-06-05 06:57:00,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145391 to 98900. [2021-06-05 06:57:00,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98900 states, 98899 states have (on average 2.952426212600734) internal successors, (291992), 98899 states have internal predecessors, (291992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:00,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98900 states to 98900 states and 291992 transitions. [2021-06-05 06:57:00,457 INFO L78 Accepts]: Start accepts. Automaton has 98900 states and 291992 transitions. Word has length 43 [2021-06-05 06:57:00,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:57:00,457 INFO L482 AbstractCegarLoop]: Abstraction has 98900 states and 291992 transitions. [2021-06-05 06:57:00,457 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:00,457 INFO L276 IsEmpty]: Start isEmpty. Operand 98900 states and 291992 transitions. [2021-06-05 06:57:00,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 06:57:00,591 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:57:00,592 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 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 06:57:00,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2021-06-05 06:57:00,792 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:57:00,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:57:00,792 INFO L82 PathProgramCache]: Analyzing trace with hash 925672338, now seen corresponding path program 153 times [2021-06-05 06:57:00,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:57:00,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712425806] [2021-06-05 06:57:00,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:57:00,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:57:00,834 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:00,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:57:00,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712425806] [2021-06-05 06:57:00,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712425806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:00,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71170919] [2021-06-05 06:57:00,835 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 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:57:00,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 06:57:00,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:57:00,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 06:57:00,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:57:00,959 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:00,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71170919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:00,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:57:00,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 06:57:00,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041730329] [2021-06-05 06:57:00,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:57:00,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:57:00,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:57:00,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:57:00,960 INFO L87 Difference]: Start difference. First operand 98900 states and 291992 transitions. Second operand has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 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 06:57:02,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:57:02,341 INFO L93 Difference]: Finished difference Result 115582 states and 339026 transitions. [2021-06-05 06:57:02,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 06:57:02,341 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 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 43 [2021-06-05 06:57:02,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:57:02,575 INFO L225 Difference]: With dead ends: 115582 [2021-06-05 06:57:02,576 INFO L226 Difference]: Without dead ends: 115570 [2021-06-05 06:57:02,576 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 536 ImplicationChecksByTransitivity, 382.2ms TimeCoverageRelationStatistics Valid=876, Invalid=1674, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 06:57:02,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115570 states. [2021-06-05 06:57:04,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115570 to 102024. [2021-06-05 06:57:04,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102024 states, 102023 states have (on average 2.9566078237260225) internal successors, (301642), 102023 states have internal predecessors, (301642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:05,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102024 states to 102024 states and 301642 transitions. [2021-06-05 06:57:05,059 INFO L78 Accepts]: Start accepts. Automaton has 102024 states and 301642 transitions. Word has length 43 [2021-06-05 06:57:05,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:57:05,059 INFO L482 AbstractCegarLoop]: Abstraction has 102024 states and 301642 transitions. [2021-06-05 06:57:05,059 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 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 06:57:05,059 INFO L276 IsEmpty]: Start isEmpty. Operand 102024 states and 301642 transitions. [2021-06-05 06:57:05,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 06:57:05,188 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:57:05,188 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 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 06:57:05,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:57:05,388 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:57:05,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:57:05,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1654424156, now seen corresponding path program 154 times [2021-06-05 06:57:05,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:57:05,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869552522] [2021-06-05 06:57:05,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:57:05,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:57:05,429 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:05,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:57:05,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869552522] [2021-06-05 06:57:05,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869552522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:05,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806570842] [2021-06-05 06:57:05,430 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 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:57:05,454 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:57:05,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:57:05,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 06:57:05,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:57:05,548 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:05,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806570842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:05,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:57:05,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 06:57:05,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254326630] [2021-06-05 06:57:05,549 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:57:05,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:57:05,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:57:05,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:57:05,549 INFO L87 Difference]: Start difference. First operand 102024 states and 301642 transitions. Second operand has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 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 06:57:07,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:57:07,239 INFO L93 Difference]: Finished difference Result 117555 states and 344061 transitions. [2021-06-05 06:57:07,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 06:57:07,239 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 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 43 [2021-06-05 06:57:07,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:57:07,639 INFO L225 Difference]: With dead ends: 117555 [2021-06-05 06:57:07,639 INFO L226 Difference]: Without dead ends: 117555 [2021-06-05 06:57:07,640 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 500.1ms TimeCoverageRelationStatistics Valid=1199, Invalid=2341, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 06:57:07,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117555 states. [2021-06-05 06:57:09,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117555 to 94698. [2021-06-05 06:57:09,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94698 states, 94697 states have (on average 2.949797776064712) internal successors, (279337), 94697 states have internal predecessors, (279337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:09,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94698 states to 94698 states and 279337 transitions. [2021-06-05 06:57:09,729 INFO L78 Accepts]: Start accepts. Automaton has 94698 states and 279337 transitions. Word has length 43 [2021-06-05 06:57:09,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:57:09,729 INFO L482 AbstractCegarLoop]: Abstraction has 94698 states and 279337 transitions. [2021-06-05 06:57:09,729 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 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 06:57:09,730 INFO L276 IsEmpty]: Start isEmpty. Operand 94698 states and 279337 transitions. [2021-06-05 06:57:09,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 06:57:09,865 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:57:09,865 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 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 06:57:10,065 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:57:10,065 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:57:10,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:57:10,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1277453002, now seen corresponding path program 155 times [2021-06-05 06:57:10,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:57:10,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971439658] [2021-06-05 06:57:10,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:57:10,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:57:10,107 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:10,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:57:10,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971439658] [2021-06-05 06:57:10,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971439658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:10,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648373499] [2021-06-05 06:57:10,107 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 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:57:10,134 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:57:10,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:57:10,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 06:57:10,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:57:10,234 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:10,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648373499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:10,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:57:10,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 06:57:10,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256910362] [2021-06-05 06:57:10,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:57:10,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:57:10,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:57:10,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:57:10,235 INFO L87 Difference]: Start difference. First operand 94698 states and 279337 transitions. Second operand has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 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 06:57:11,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:57:11,577 INFO L93 Difference]: Finished difference Result 139702 states and 406719 transitions. [2021-06-05 06:57:11,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 06:57:11,577 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 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 43 [2021-06-05 06:57:11,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:57:11,838 INFO L225 Difference]: With dead ends: 139702 [2021-06-05 06:57:11,838 INFO L226 Difference]: Without dead ends: 139688 [2021-06-05 06:57:11,838 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 621 ImplicationChecksByTransitivity, 392.1ms TimeCoverageRelationStatistics Valid=571, Invalid=1685, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 06:57:11,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139688 states. [2021-06-05 06:57:14,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139688 to 87080. [2021-06-05 06:57:14,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87080 states, 87079 states have (on average 2.938527084601339) internal successors, (255884), 87079 states have internal predecessors, (255884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:14,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87080 states to 87080 states and 255884 transitions. [2021-06-05 06:57:14,298 INFO L78 Accepts]: Start accepts. Automaton has 87080 states and 255884 transitions. Word has length 43 [2021-06-05 06:57:14,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:57:14,298 INFO L482 AbstractCegarLoop]: Abstraction has 87080 states and 255884 transitions. [2021-06-05 06:57:14,298 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 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 06:57:14,298 INFO L276 IsEmpty]: Start isEmpty. Operand 87080 states and 255884 transitions. [2021-06-05 06:57:14,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 06:57:14,420 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:57:14,420 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 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 06:57:14,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:57:14,621 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:57:14,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:57:14,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1361851776, now seen corresponding path program 156 times [2021-06-05 06:57:14,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:57:14,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583701197] [2021-06-05 06:57:14,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:57:14,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:57:14,660 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:14,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:57:14,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583701197] [2021-06-05 06:57:14,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583701197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:14,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894920531] [2021-06-05 06:57:14,661 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 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:57:14,686 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:57:14,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:57:14,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 06:57:14,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:57:14,794 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:14,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894920531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:14,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:57:14,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 06:57:14,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117778197] [2021-06-05 06:57:14,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:57:14,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:57:14,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:57:14,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:57:14,795 INFO L87 Difference]: Start difference. First operand 87080 states and 255884 transitions. Second operand has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 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 06:57:16,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:57:16,130 INFO L93 Difference]: Finished difference Result 134788 states and 392170 transitions. [2021-06-05 06:57:16,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 06:57:16,131 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 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 43 [2021-06-05 06:57:16,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:57:16,385 INFO L225 Difference]: With dead ends: 134788 [2021-06-05 06:57:16,386 INFO L226 Difference]: Without dead ends: 134732 [2021-06-05 06:57:16,386 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 342.2ms TimeCoverageRelationStatistics Valid=502, Invalid=1568, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 06:57:16,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134732 states. [2021-06-05 06:57:18,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134732 to 88260. [2021-06-05 06:57:18,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88260 states, 88259 states have (on average 2.9363804257922705) internal successors, (259162), 88259 states have internal predecessors, (259162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:18,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88260 states to 88260 states and 259162 transitions. [2021-06-05 06:57:18,923 INFO L78 Accepts]: Start accepts. Automaton has 88260 states and 259162 transitions. Word has length 43 [2021-06-05 06:57:18,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:57:18,923 INFO L482 AbstractCegarLoop]: Abstraction has 88260 states and 259162 transitions. [2021-06-05 06:57:18,923 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 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 06:57:18,923 INFO L276 IsEmpty]: Start isEmpty. Operand 88260 states and 259162 transitions. [2021-06-05 06:57:19,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 06:57:19,041 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:57:19,041 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 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 06:57:19,242 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:57:19,242 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:57:19,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:57:19,242 INFO L82 PathProgramCache]: Analyzing trace with hash -1293078010, now seen corresponding path program 157 times [2021-06-05 06:57:19,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:57:19,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786325072] [2021-06-05 06:57:19,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:57:19,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:57:19,282 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:19,282 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:57:19,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786325072] [2021-06-05 06:57:19,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786325072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:19,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725758859] [2021-06-05 06:57:19,283 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 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:57:19,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:57:19,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 06:57:19,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:57:19,405 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:19,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725758859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:19,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:57:19,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 06:57:19,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294991927] [2021-06-05 06:57:19,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:57:19,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:57:19,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:57:19,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:57:19,405 INFO L87 Difference]: Start difference. First operand 88260 states and 259162 transitions. Second operand has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 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 06:57:20,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:57:20,237 INFO L93 Difference]: Finished difference Result 137498 states and 399912 transitions. [2021-06-05 06:57:20,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 06:57:20,237 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 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 43 [2021-06-05 06:57:20,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:57:20,498 INFO L225 Difference]: With dead ends: 137498 [2021-06-05 06:57:20,498 INFO L226 Difference]: Without dead ends: 137400 [2021-06-05 06:57:20,498 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 314.9ms TimeCoverageRelationStatistics Valid=452, Invalid=1440, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 06:57:21,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137400 states. [2021-06-05 06:57:22,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137400 to 89196. [2021-06-05 06:57:22,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89196 states, 89195 states have (on average 2.935433600538147) internal successors, (261826), 89195 states have internal predecessors, (261826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:22,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89196 states to 89196 states and 261826 transitions. [2021-06-05 06:57:22,974 INFO L78 Accepts]: Start accepts. Automaton has 89196 states and 261826 transitions. Word has length 43 [2021-06-05 06:57:22,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:57:22,975 INFO L482 AbstractCegarLoop]: Abstraction has 89196 states and 261826 transitions. [2021-06-05 06:57:22,975 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 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 06:57:22,975 INFO L276 IsEmpty]: Start isEmpty. Operand 89196 states and 261826 transitions. [2021-06-05 06:57:23,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 06:57:23,104 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:57:23,105 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 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 06:57:23,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable254,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:57:23,309 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:57:23,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:57:23,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1811390400, now seen corresponding path program 158 times [2021-06-05 06:57:23,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:57:23,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880912367] [2021-06-05 06:57:23,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:57:23,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:57:23,352 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:23,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:57:23,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880912367] [2021-06-05 06:57:23,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880912367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:23,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682629015] [2021-06-05 06:57:23,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:57:23,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:57:23,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:57:23,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 06:57:23,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:57:23,477 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:23,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682629015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:23,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:57:23,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 06:57:23,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059312482] [2021-06-05 06:57:23,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:57:23,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:57:23,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:57:23,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:57:23,478 INFO L87 Difference]: Start difference. First operand 89196 states and 261826 transitions. Second operand has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 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 06:57:24,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:57:24,526 INFO L93 Difference]: Finished difference Result 130434 states and 379264 transitions. [2021-06-05 06:57:24,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 06:57:24,527 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 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 43 [2021-06-05 06:57:24,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:57:24,775 INFO L225 Difference]: With dead ends: 130434 [2021-06-05 06:57:24,775 INFO L226 Difference]: Without dead ends: 130364 [2021-06-05 06:57:24,775 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 258.5ms TimeCoverageRelationStatistics Valid=316, Invalid=944, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 06:57:24,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130364 states. [2021-06-05 06:57:26,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130364 to 89196. [2021-06-05 06:57:27,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89196 states, 89195 states have (on average 2.9345142664947588) internal successors, (261744), 89195 states have internal predecessors, (261744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:27,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89196 states to 89196 states and 261744 transitions. [2021-06-05 06:57:27,197 INFO L78 Accepts]: Start accepts. Automaton has 89196 states and 261744 transitions. Word has length 43 [2021-06-05 06:57:27,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:57:27,197 INFO L482 AbstractCegarLoop]: Abstraction has 89196 states and 261744 transitions. [2021-06-05 06:57:27,197 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 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 06:57:27,197 INFO L276 IsEmpty]: Start isEmpty. Operand 89196 states and 261744 transitions. [2021-06-05 06:57:27,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 06:57:27,320 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:57:27,320 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 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 06:57:27,521 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2021-06-05 06:57:27,521 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:57:27,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:57:27,521 INFO L82 PathProgramCache]: Analyzing trace with hash -939318, now seen corresponding path program 159 times [2021-06-05 06:57:27,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:57:27,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425871643] [2021-06-05 06:57:27,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:57:27,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:57:27,565 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:27,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:57:27,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425871643] [2021-06-05 06:57:27,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425871643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:27,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141718486] [2021-06-05 06:57:27,565 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 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:57:27,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 06:57:27,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:57:27,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 06:57:27,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:57:27,694 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:27,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141718486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:27,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:57:27,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 06:57:27,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827380322] [2021-06-05 06:57:27,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:57:27,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:57:27,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:57:27,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:57:27,695 INFO L87 Difference]: Start difference. First operand 89196 states and 261744 transitions. Second operand has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:28,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:57:28,587 INFO L93 Difference]: Finished difference Result 104528 states and 305186 transitions. [2021-06-05 06:57:28,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 06:57:28,588 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 06:57:28,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:57:29,172 INFO L225 Difference]: With dead ends: 104528 [2021-06-05 06:57:29,172 INFO L226 Difference]: Without dead ends: 104468 [2021-06-05 06:57:29,173 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 724 ImplicationChecksByTransitivity, 436.9ms TimeCoverageRelationStatistics Valid=973, Invalid=2107, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 06:57:29,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104468 states. [2021-06-05 06:57:30,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104468 to 92172. [2021-06-05 06:57:30,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92172 states, 92171 states have (on average 2.933634223345738) internal successors, (270396), 92171 states have internal predecessors, (270396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:30,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92172 states to 92172 states and 270396 transitions. [2021-06-05 06:57:30,999 INFO L78 Accepts]: Start accepts. Automaton has 92172 states and 270396 transitions. Word has length 43 [2021-06-05 06:57:30,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:57:30,999 INFO L482 AbstractCegarLoop]: Abstraction has 92172 states and 270396 transitions. [2021-06-05 06:57:31,000 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:31,000 INFO L276 IsEmpty]: Start isEmpty. Operand 92172 states and 270396 transitions. [2021-06-05 06:57:31,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 06:57:31,125 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:57:31,125 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 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 06:57:31,326 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2021-06-05 06:57:31,326 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:57:31,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:57:31,326 INFO L82 PathProgramCache]: Analyzing trace with hash 415720322, now seen corresponding path program 160 times [2021-06-05 06:57:31,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:57:31,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706652952] [2021-06-05 06:57:31,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:57:31,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:57:31,361 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:31,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:57:31,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706652952] [2021-06-05 06:57:31,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706652952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:31,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959946125] [2021-06-05 06:57:31,362 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 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:57:31,388 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:57:31,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:57:31,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 06:57:31,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:57:31,485 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:31,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959946125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:31,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:57:31,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-06-05 06:57:31,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956549668] [2021-06-05 06:57:31,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:57:31,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:57:31,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:57:31,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:57:31,486 INFO L87 Difference]: Start difference. First operand 92172 states and 270396 transitions. Second operand has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:32,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:57:32,947 INFO L93 Difference]: Finished difference Result 107768 states and 313292 transitions. [2021-06-05 06:57:32,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 06:57:32,947 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 06:57:32,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:57:33,156 INFO L225 Difference]: With dead ends: 107768 [2021-06-05 06:57:33,156 INFO L226 Difference]: Without dead ends: 107740 [2021-06-05 06:57:33,156 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 952 ImplicationChecksByTransitivity, 916.4ms TimeCoverageRelationStatistics Valid=1190, Invalid=2350, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 06:57:33,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107740 states. [2021-06-05 06:57:35,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107740 to 86702. [2021-06-05 06:57:35,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86702 states, 86701 states have (on average 2.93416454250816) internal successors, (254395), 86701 states have internal predecessors, (254395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:35,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86702 states to 86702 states and 254395 transitions. [2021-06-05 06:57:35,450 INFO L78 Accepts]: Start accepts. Automaton has 86702 states and 254395 transitions. Word has length 43 [2021-06-05 06:57:35,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:57:35,450 INFO L482 AbstractCegarLoop]: Abstraction has 86702 states and 254395 transitions. [2021-06-05 06:57:35,450 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:35,450 INFO L276 IsEmpty]: Start isEmpty. Operand 86702 states and 254395 transitions. [2021-06-05 06:57:35,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 06:57:35,582 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:57:35,582 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 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 06:57:35,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2021-06-05 06:57:35,784 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:57:35,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:57:35,785 INFO L82 PathProgramCache]: Analyzing trace with hash -976949870, now seen corresponding path program 161 times [2021-06-05 06:57:35,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:57:35,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208643633] [2021-06-05 06:57:35,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:57:35,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:57:35,827 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:35,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:57:35,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208643633] [2021-06-05 06:57:35,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208643633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:35,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436935692] [2021-06-05 06:57:35,827 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 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:57:35,854 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 06:57:35,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:57:35,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 06:57:35,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:57:35,970 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:35,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436935692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:35,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:57:35,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 06:57:35,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774615837] [2021-06-05 06:57:35,970 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:57:35,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:57:35,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:57:35,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:57:35,971 INFO L87 Difference]: Start difference. First operand 86702 states and 254395 transitions. Second operand has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:37,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:57:37,318 INFO L93 Difference]: Finished difference Result 106763 states and 310618 transitions. [2021-06-05 06:57:37,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 06:57:37,329 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 06:57:37,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:57:37,557 INFO L225 Difference]: With dead ends: 106763 [2021-06-05 06:57:37,557 INFO L226 Difference]: Without dead ends: 106625 [2021-06-05 06:57:37,558 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 879 ImplicationChecksByTransitivity, 496.3ms TimeCoverageRelationStatistics Valid=996, Invalid=2426, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 06:57:37,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106625 states. [2021-06-05 06:57:39,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106625 to 89334. [2021-06-05 06:57:39,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89334 states, 89333 states have (on average 2.9301042168067792) internal successors, (261755), 89333 states have internal predecessors, (261755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:39,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89334 states to 89334 states and 261755 transitions. [2021-06-05 06:57:39,396 INFO L78 Accepts]: Start accepts. Automaton has 89334 states and 261755 transitions. Word has length 43 [2021-06-05 06:57:39,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:57:39,396 INFO L482 AbstractCegarLoop]: Abstraction has 89334 states and 261755 transitions. [2021-06-05 06:57:39,397 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:39,397 INFO L276 IsEmpty]: Start isEmpty. Operand 89334 states and 261755 transitions. [2021-06-05 06:57:39,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 06:57:39,524 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:57:39,524 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 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 06:57:39,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable258,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:57:39,725 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:57:39,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:57:39,725 INFO L82 PathProgramCache]: Analyzing trace with hash -725487968, now seen corresponding path program 162 times [2021-06-05 06:57:39,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:57:39,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141102811] [2021-06-05 06:57:39,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:57:39,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:57:39,756 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:39,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:57:39,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141102811] [2021-06-05 06:57:39,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141102811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:39,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964120025] [2021-06-05 06:57:39,756 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 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:57:39,783 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 06:57:39,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:57:39,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 06:57:39,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:57:39,886 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:39,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964120025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:39,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:57:39,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 16 [2021-06-05 06:57:39,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771834141] [2021-06-05 06:57:39,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:57:39,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:57:39,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:57:39,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:57:39,887 INFO L87 Difference]: Start difference. First operand 89334 states and 261755 transitions. Second operand has 16 states, 16 states have (on average 3.6875) internal successors, (59), 16 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:40,364 WARN L205 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 11 [2021-06-05 06:57:41,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:57:41,361 INFO L93 Difference]: Finished difference Result 113867 states and 330296 transitions. [2021-06-05 06:57:41,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 06:57:41,362 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 16 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 06:57:41,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:57:41,567 INFO L225 Difference]: With dead ends: 113867 [2021-06-05 06:57:41,568 INFO L226 Difference]: Without dead ends: 113832 [2021-06-05 06:57:41,568 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1420 ImplicationChecksByTransitivity, 960.2ms TimeCoverageRelationStatistics Valid=1526, Invalid=3030, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 06:57:41,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113832 states. [2021-06-05 06:57:43,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113832 to 94432. [2021-06-05 06:57:43,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94432 states, 94431 states have (on average 2.931727928328621) internal successors, (276846), 94431 states have internal predecessors, (276846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:43,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94432 states to 94432 states and 276846 transitions. [2021-06-05 06:57:43,900 INFO L78 Accepts]: Start accepts. Automaton has 94432 states and 276846 transitions. Word has length 43 [2021-06-05 06:57:43,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:57:43,900 INFO L482 AbstractCegarLoop]: Abstraction has 94432 states and 276846 transitions. [2021-06-05 06:57:43,901 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 16 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:43,901 INFO L276 IsEmpty]: Start isEmpty. Operand 94432 states and 276846 transitions. [2021-06-05 06:57:44,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 06:57:44,039 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:57:44,039 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 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 06:57:44,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable259 [2021-06-05 06:57:44,240 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:57:44,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:57:44,240 INFO L82 PathProgramCache]: Analyzing trace with hash -378710582, now seen corresponding path program 163 times [2021-06-05 06:57:44,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:57:44,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925250319] [2021-06-05 06:57:44,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:57:44,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:57:44,283 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:44,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:57:44,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925250319] [2021-06-05 06:57:44,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925250319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:44,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116317177] [2021-06-05 06:57:44,284 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 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:57:44,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:57:44,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 06:57:44,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:57:44,434 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:44,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116317177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:44,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:57:44,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 06:57:44,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985154790] [2021-06-05 06:57:44,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:57:44,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:57:44,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:57:44,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:57:44,435 INFO L87 Difference]: Start difference. First operand 94432 states and 276846 transitions. Second operand has 19 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:45,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:57:45,922 INFO L93 Difference]: Finished difference Result 114703 states and 333022 transitions. [2021-06-05 06:57:45,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 06:57:45,922 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 06:57:45,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:57:46,146 INFO L225 Difference]: With dead ends: 114703 [2021-06-05 06:57:46,146 INFO L226 Difference]: Without dead ends: 114511 [2021-06-05 06:57:46,146 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1135 ImplicationChecksByTransitivity, 554.3ms TimeCoverageRelationStatistics Valid=1034, Invalid=2748, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 06:57:46,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114511 states. [2021-06-05 06:57:47,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114511 to 99458. [2021-06-05 06:57:48,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99458 states, 99457 states have (on average 2.9280090893551987) internal successors, (291211), 99457 states have internal predecessors, (291211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:48,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99458 states to 99458 states and 291211 transitions. [2021-06-05 06:57:48,701 INFO L78 Accepts]: Start accepts. Automaton has 99458 states and 291211 transitions. Word has length 43 [2021-06-05 06:57:48,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:57:48,701 INFO L482 AbstractCegarLoop]: Abstraction has 99458 states and 291211 transitions. [2021-06-05 06:57:48,701 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:48,701 INFO L276 IsEmpty]: Start isEmpty. Operand 99458 states and 291211 transitions. [2021-06-05 06:57:48,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 06:57:48,813 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:57:48,813 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 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 06:57:49,013 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:57:49,013 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:57:49,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:57:49,013 INFO L82 PathProgramCache]: Analyzing trace with hash 499459778, now seen corresponding path program 164 times [2021-06-05 06:57:49,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:57:49,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091040967] [2021-06-05 06:57:49,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:57:49,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:57:49,040 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:49,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:57:49,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091040967] [2021-06-05 06:57:49,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091040967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:49,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647410655] [2021-06-05 06:57:49,040 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 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:57:49,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:57:49,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:57:49,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 06:57:49,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:57:49,184 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:49,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647410655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:49,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:57:49,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 16 [2021-06-05 06:57:49,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155818537] [2021-06-05 06:57:49,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:57:49,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:57:49,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:57:49,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:57:49,185 INFO L87 Difference]: Start difference. First operand 99458 states and 291211 transitions. Second operand has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:50,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:57:50,329 INFO L93 Difference]: Finished difference Result 134026 states and 389085 transitions. [2021-06-05 06:57:50,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 06:57:50,330 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 06:57:50,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:57:51,004 INFO L225 Difference]: With dead ends: 134026 [2021-06-05 06:57:51,004 INFO L226 Difference]: Without dead ends: 133998 [2021-06-05 06:57:51,004 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1607 ImplicationChecksByTransitivity, 583.3ms TimeCoverageRelationStatistics Valid=1414, Invalid=2876, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 06:57:51,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133998 states. [2021-06-05 06:57:53,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133998 to 114908. [2021-06-05 06:57:53,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114908 states, 114907 states have (on average 2.922328491736796) internal successors, (335796), 114907 states have internal predecessors, (335796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:53,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114908 states to 114908 states and 335796 transitions. [2021-06-05 06:57:53,616 INFO L78 Accepts]: Start accepts. Automaton has 114908 states and 335796 transitions. Word has length 43 [2021-06-05 06:57:53,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:57:53,616 INFO L482 AbstractCegarLoop]: Abstraction has 114908 states and 335796 transitions. [2021-06-05 06:57:53,617 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:53,617 INFO L276 IsEmpty]: Start isEmpty. Operand 114908 states and 335796 transitions. [2021-06-05 06:57:53,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 06:57:53,786 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:57:53,786 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 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 06:57:53,986 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:57:53,986 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:57:53,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:57:53,987 INFO L82 PathProgramCache]: Analyzing trace with hash 223084418, now seen corresponding path program 165 times [2021-06-05 06:57:53,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:57:53,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701170984] [2021-06-05 06:57:53,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:57:53,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:57:54,031 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:54,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:57:54,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701170984] [2021-06-05 06:57:54,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701170984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:54,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874859408] [2021-06-05 06:57:54,031 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 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:57:54,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 06:57:54,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:57:54,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 06:57:54,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:57:54,151 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:54,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874859408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:54,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:57:54,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-05 06:57:54,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067849738] [2021-06-05 06:57:54,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:57:54,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:57:54,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:57:54,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:57:54,152 INFO L87 Difference]: Start difference. First operand 114908 states and 335796 transitions. Second operand has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:54,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:57:54,786 INFO L93 Difference]: Finished difference Result 127931 states and 372783 transitions. [2021-06-05 06:57:54,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 06:57:54,786 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 06:57:54,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:57:55,572 INFO L225 Difference]: With dead ends: 127931 [2021-06-05 06:57:55,572 INFO L226 Difference]: Without dead ends: 127931 [2021-06-05 06:57:55,572 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 137.0ms TimeCoverageRelationStatistics Valid=185, Invalid=415, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:57:55,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127931 states. [2021-06-05 06:57:57,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127931 to 115940. [2021-06-05 06:57:57,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115940 states, 115939 states have (on average 2.9225368512752397) internal successors, (338836), 115939 states have internal predecessors, (338836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:57,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115940 states to 115940 states and 338836 transitions. [2021-06-05 06:57:57,653 INFO L78 Accepts]: Start accepts. Automaton has 115940 states and 338836 transitions. Word has length 43 [2021-06-05 06:57:57,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:57:57,653 INFO L482 AbstractCegarLoop]: Abstraction has 115940 states and 338836 transitions. [2021-06-05 06:57:57,653 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:57,653 INFO L276 IsEmpty]: Start isEmpty. Operand 115940 states and 338836 transitions. [2021-06-05 06:57:58,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 06:57:58,307 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:57:58,307 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 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 06:57:58,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:57:58,513 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:57:58,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:57:58,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1001606290, now seen corresponding path program 166 times [2021-06-05 06:57:58,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:57:58,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779186727] [2021-06-05 06:57:58,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:57:58,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:57:58,558 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:58,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:57:58,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779186727] [2021-06-05 06:57:58,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779186727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:58,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809878689] [2021-06-05 06:57:58,558 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 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:57:58,585 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:57:58,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:57:58,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 06:57:58,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:57:58,694 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:58,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809878689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:58,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:57:58,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-05 06:57:58,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70301911] [2021-06-05 06:57:58,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:57:58,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:57:58,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:57:58,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:57:58,695 INFO L87 Difference]: Start difference. First operand 115940 states and 338836 transitions. Second operand has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:59,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:57:59,229 INFO L93 Difference]: Finished difference Result 136802 states and 396449 transitions. [2021-06-05 06:57:59,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 06:57:59,230 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 06:57:59,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:57:59,478 INFO L225 Difference]: With dead ends: 136802 [2021-06-05 06:57:59,478 INFO L226 Difference]: Without dead ends: 136730 [2021-06-05 06:57:59,478 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 132.3ms TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:57:59,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136730 states. [2021-06-05 06:58:01,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136730 to 115940. [2021-06-05 06:58:01,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115940 states, 115939 states have (on average 2.9224333485712313) internal successors, (338824), 115939 states have internal predecessors, (338824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:02,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115940 states to 115940 states and 338824 transitions. [2021-06-05 06:58:02,153 INFO L78 Accepts]: Start accepts. Automaton has 115940 states and 338824 transitions. Word has length 43 [2021-06-05 06:58:02,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:02,153 INFO L482 AbstractCegarLoop]: Abstraction has 115940 states and 338824 transitions. [2021-06-05 06:58:02,153 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:02,153 INFO L276 IsEmpty]: Start isEmpty. Operand 115940 states and 338824 transitions. [2021-06-05 06:58:02,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 06:58:02,322 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:02,322 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 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 06:58:02,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable263 [2021-06-05 06:58:02,523 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:02,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:02,523 INFO L82 PathProgramCache]: Analyzing trace with hash 5413476, now seen corresponding path program 167 times [2021-06-05 06:58:02,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:02,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371460436] [2021-06-05 06:58:02,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:02,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:02,565 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:02,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:02,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371460436] [2021-06-05 06:58:02,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371460436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:02,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505363296] [2021-06-05 06:58:02,566 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 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:02,592 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 06:58:02,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:02,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 06:58:02,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:02,685 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:02,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505363296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:02,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:02,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 06:58:02,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157111876] [2021-06-05 06:58:02,686 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:58:02,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:02,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:58:02,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:58:02,686 INFO L87 Difference]: Start difference. First operand 115940 states and 338824 transitions. Second operand has 16 states, 16 states have (on average 3.75) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:03,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:03,947 INFO L93 Difference]: Finished difference Result 126431 states and 367544 transitions. [2021-06-05 06:58:03,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 06:58:03,947 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 06:58:03,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:04,188 INFO L225 Difference]: With dead ends: 126431 [2021-06-05 06:58:04,188 INFO L226 Difference]: Without dead ends: 126431 [2021-06-05 06:58:04,188 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 194.7ms TimeCoverageRelationStatistics Valid=280, Invalid=590, Unknown=0, NotChecked=0, Total=870 [2021-06-05 06:58:04,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126431 states. [2021-06-05 06:58:06,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126431 to 116842. [2021-06-05 06:58:06,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116842 states, 116841 states have (on average 2.9219109730317268) internal successors, (341399), 116841 states have internal predecessors, (341399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:06,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116842 states to 116842 states and 341399 transitions. [2021-06-05 06:58:06,851 INFO L78 Accepts]: Start accepts. Automaton has 116842 states and 341399 transitions. Word has length 43 [2021-06-05 06:58:06,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:06,851 INFO L482 AbstractCegarLoop]: Abstraction has 116842 states and 341399 transitions. [2021-06-05 06:58:06,851 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:06,852 INFO L276 IsEmpty]: Start isEmpty. Operand 116842 states and 341399 transitions. [2021-06-05 06:58:07,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 06:58:07,036 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:07,036 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 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 06:58:07,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:07,236 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:07,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:07,236 INFO L82 PathProgramCache]: Analyzing trace with hash -1165282054, now seen corresponding path program 168 times [2021-06-05 06:58:07,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:07,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963537758] [2021-06-05 06:58:07,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:07,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:07,278 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:07,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:07,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963537758] [2021-06-05 06:58:07,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963537758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:07,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20692794] [2021-06-05 06:58:07,278 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 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:07,408 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 06:58:07,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:07,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 06:58:07,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:07,507 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:07,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20692794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:07,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:07,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 06:58:07,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651926009] [2021-06-05 06:58:07,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:58:07,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:07,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:58:07,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:58:07,508 INFO L87 Difference]: Start difference. First operand 116842 states and 341399 transitions. Second operand has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 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 06:58:08,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:08,846 INFO L93 Difference]: Finished difference Result 138518 states and 400785 transitions. [2021-06-05 06:58:08,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 06:58:08,847 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 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 43 [2021-06-05 06:58:08,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:09,132 INFO L225 Difference]: With dead ends: 138518 [2021-06-05 06:58:09,132 INFO L226 Difference]: Without dead ends: 138458 [2021-06-05 06:58:09,132 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 282.5ms TimeCoverageRelationStatistics Valid=373, Invalid=1109, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 06:58:09,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138458 states. [2021-06-05 06:58:11,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138458 to 120234. [2021-06-05 06:58:11,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120234 states, 120233 states have (on average 2.923947668277428) internal successors, (351555), 120233 states have internal predecessors, (351555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:11,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120234 states to 120234 states and 351555 transitions. [2021-06-05 06:58:11,716 INFO L78 Accepts]: Start accepts. Automaton has 120234 states and 351555 transitions. Word has length 43 [2021-06-05 06:58:11,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:11,716 INFO L482 AbstractCegarLoop]: Abstraction has 120234 states and 351555 transitions. [2021-06-05 06:58:11,716 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 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 06:58:11,716 INFO L276 IsEmpty]: Start isEmpty. Operand 120234 states and 351555 transitions. [2021-06-05 06:58:11,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 06:58:11,893 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:11,893 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 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 06:58:12,093 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2021-06-05 06:58:12,093 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:12,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:12,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1534575938, now seen corresponding path program 169 times [2021-06-05 06:58:12,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:12,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935545217] [2021-06-05 06:58:12,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:12,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:12,134 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:12,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:12,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935545217] [2021-06-05 06:58:12,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935545217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:12,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203157085] [2021-06-05 06:58:12,134 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 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:12,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:12,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 06:58:12,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:12,253 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:12,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203157085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:12,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:12,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 06:58:12,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299014335] [2021-06-05 06:58:12,253 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:58:12,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:12,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:58:12,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:58:12,254 INFO L87 Difference]: Start difference. First operand 120234 states and 351555 transitions. Second operand has 16 states, 16 states have (on average 3.75) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:14,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:14,080 INFO L93 Difference]: Finished difference Result 137463 states and 399174 transitions. [2021-06-05 06:58:14,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 06:58:14,080 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 06:58:14,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:14,462 INFO L225 Difference]: With dead ends: 137463 [2021-06-05 06:58:14,462 INFO L226 Difference]: Without dead ends: 137463 [2021-06-05 06:58:14,463 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 436.8ms TimeCoverageRelationStatistics Valid=814, Invalid=1838, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 06:58:14,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137463 states. [2021-06-05 06:58:16,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137463 to 123758. [2021-06-05 06:58:16,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123758 states, 123757 states have (on average 2.921378184668342) internal successors, (361541), 123757 states have internal predecessors, (361541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:17,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123758 states to 123758 states and 361541 transitions. [2021-06-05 06:58:17,264 INFO L78 Accepts]: Start accepts. Automaton has 123758 states and 361541 transitions. Word has length 43 [2021-06-05 06:58:17,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:17,264 INFO L482 AbstractCegarLoop]: Abstraction has 123758 states and 361541 transitions. [2021-06-05 06:58:17,264 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:17,264 INFO L276 IsEmpty]: Start isEmpty. Operand 123758 states and 361541 transitions. [2021-06-05 06:58:17,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 06:58:17,437 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:17,437 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 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 06:58:17,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2021-06-05 06:58:17,637 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:17,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:17,638 INFO L82 PathProgramCache]: Analyzing trace with hash -268885396, now seen corresponding path program 170 times [2021-06-05 06:58:17,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:17,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104108350] [2021-06-05 06:58:17,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:17,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:17,678 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:17,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:17,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104108350] [2021-06-05 06:58:17,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104108350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:17,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808213475] [2021-06-05 06:58:17,679 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 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:17,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:58:17,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:17,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 06:58:17,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:17,801 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:17,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808213475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:17,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:17,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 06:58:17,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159189342] [2021-06-05 06:58:17,801 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:58:17,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:17,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:58:17,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:58:17,802 INFO L87 Difference]: Start difference. First operand 123758 states and 361541 transitions. Second operand has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 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 06:58:19,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:19,270 INFO L93 Difference]: Finished difference Result 164424 states and 477010 transitions. [2021-06-05 06:58:19,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 06:58:19,270 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 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 43 [2021-06-05 06:58:19,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:19,583 INFO L225 Difference]: With dead ends: 164424 [2021-06-05 06:58:19,584 INFO L226 Difference]: Without dead ends: 164340 [2021-06-05 06:58:19,584 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 338.9ms TimeCoverageRelationStatistics Valid=497, Invalid=1573, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 06:58:19,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164340 states. [2021-06-05 06:58:22,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164340 to 139180. [2021-06-05 06:58:22,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139180 states, 139179 states have (on average 2.9166469079386976) internal successors, (405936), 139179 states have internal predecessors, (405936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:22,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139180 states to 139180 states and 405936 transitions. [2021-06-05 06:58:22,490 INFO L78 Accepts]: Start accepts. Automaton has 139180 states and 405936 transitions. Word has length 43 [2021-06-05 06:58:22,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:22,490 INFO L482 AbstractCegarLoop]: Abstraction has 139180 states and 405936 transitions. [2021-06-05 06:58:22,490 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 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 06:58:22,490 INFO L276 IsEmpty]: Start isEmpty. Operand 139180 states and 405936 transitions. [2021-06-05 06:58:22,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 06:58:22,710 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:22,710 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 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 06:58:22,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267 [2021-06-05 06:58:22,911 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:22,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:22,911 INFO L82 PathProgramCache]: Analyzing trace with hash -471353564, now seen corresponding path program 171 times [2021-06-05 06:58:22,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:22,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414014325] [2021-06-05 06:58:22,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:22,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:22,957 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:22,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:22,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414014325] [2021-06-05 06:58:22,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414014325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:22,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684744305] [2021-06-05 06:58:22,958 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 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:22,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 06:58:22,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:22,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 06:58:22,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:23,525 WARN L205 SmtUtils]: Spent 534.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2021-06-05 06:58:23,682 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:23,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684744305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:23,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:23,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 06:58:23,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683691204] [2021-06-05 06:58:23,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:58:23,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:23,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:58:23,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:58:23,683 INFO L87 Difference]: Start difference. First operand 139180 states and 405936 transitions. Second operand has 16 states, 16 states have (on average 3.75) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:25,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:25,020 INFO L93 Difference]: Finished difference Result 166177 states and 481337 transitions. [2021-06-05 06:58:25,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 06:58:25,021 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 06:58:25,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:25,328 INFO L225 Difference]: With dead ends: 166177 [2021-06-05 06:58:25,328 INFO L226 Difference]: Without dead ends: 166177 [2021-06-05 06:58:25,329 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 768 ImplicationChecksByTransitivity, 554.9ms TimeCoverageRelationStatistics Valid=1028, Invalid=2278, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 06:58:25,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166177 states. [2021-06-05 06:58:28,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166177 to 144218. [2021-06-05 06:58:28,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144218 states, 144217 states have (on average 2.9188306510328186) internal successors, (420945), 144217 states have internal predecessors, (420945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:28,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144218 states to 144218 states and 420945 transitions. [2021-06-05 06:58:28,926 INFO L78 Accepts]: Start accepts. Automaton has 144218 states and 420945 transitions. Word has length 43 [2021-06-05 06:58:28,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:28,926 INFO L482 AbstractCegarLoop]: Abstraction has 144218 states and 420945 transitions. [2021-06-05 06:58:28,926 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:28,926 INFO L276 IsEmpty]: Start isEmpty. Operand 144218 states and 420945 transitions. [2021-06-05 06:58:29,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 06:58:29,152 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:29,152 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 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 06:58:29,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2021-06-05 06:58:29,352 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:29,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:29,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1895135802, now seen corresponding path program 172 times [2021-06-05 06:58:29,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:29,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79209549] [2021-06-05 06:58:29,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:29,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:29,393 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:29,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:29,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79209549] [2021-06-05 06:58:29,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79209549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:29,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138037322] [2021-06-05 06:58:29,393 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 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:29,421 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:58:29,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:29,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 06:58:29,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:29,518 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:29,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138037322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:29,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:29,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 06:58:29,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843778125] [2021-06-05 06:58:29,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:58:29,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:29,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:58:29,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:58:29,519 INFO L87 Difference]: Start difference. First operand 144218 states and 420945 transitions. Second operand has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 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 06:58:30,530 WARN L205 SmtUtils]: Spent 552.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2021-06-05 06:58:31,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:31,092 INFO L93 Difference]: Finished difference Result 174051 states and 506409 transitions. [2021-06-05 06:58:31,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 06:58:31,092 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 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 43 [2021-06-05 06:58:31,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:31,417 INFO L225 Difference]: With dead ends: 174051 [2021-06-05 06:58:31,417 INFO L226 Difference]: Without dead ends: 173979 [2021-06-05 06:58:31,418 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 910.2ms TimeCoverageRelationStatistics Valid=524, Invalid=1638, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 06:58:31,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173979 states. [2021-06-05 06:58:34,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173979 to 148690. [2021-06-05 06:58:34,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148690 states, 148689 states have (on average 2.920209295912946) internal successors, (434203), 148689 states have internal predecessors, (434203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:35,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148690 states to 148690 states and 434203 transitions. [2021-06-05 06:58:35,341 INFO L78 Accepts]: Start accepts. Automaton has 148690 states and 434203 transitions. Word has length 43 [2021-06-05 06:58:35,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:35,341 INFO L482 AbstractCegarLoop]: Abstraction has 148690 states and 434203 transitions. [2021-06-05 06:58:35,341 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 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 06:58:35,341 INFO L276 IsEmpty]: Start isEmpty. Operand 148690 states and 434203 transitions. [2021-06-05 06:58:35,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 06:58:35,567 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:35,567 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 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 06:58:35,767 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable269,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:35,768 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:35,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:35,768 INFO L82 PathProgramCache]: Analyzing trace with hash 562421890, now seen corresponding path program 173 times [2021-06-05 06:58:35,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:35,768 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974267664] [2021-06-05 06:58:35,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:35,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:35,811 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:35,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:35,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974267664] [2021-06-05 06:58:35,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974267664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:35,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572096706] [2021-06-05 06:58:35,811 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 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:35,839 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 06:58:35,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:35,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 06:58:35,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:35,935 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:35,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572096706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:35,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:35,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 06:58:35,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735644998] [2021-06-05 06:58:35,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:58:35,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:35,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:58:35,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:58:35,935 INFO L87 Difference]: Start difference. First operand 148690 states and 434203 transitions. Second operand has 16 states, 16 states have (on average 3.75) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:37,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:37,736 INFO L93 Difference]: Finished difference Result 170083 states and 494122 transitions. [2021-06-05 06:58:37,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 06:58:37,737 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 06:58:37,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:38,090 INFO L225 Difference]: With dead ends: 170083 [2021-06-05 06:58:38,090 INFO L226 Difference]: Without dead ends: 170083 [2021-06-05 06:58:38,090 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 858 ImplicationChecksByTransitivity, 507.6ms TimeCoverageRelationStatistics Valid=1199, Invalid=2341, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 06:58:38,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170083 states. [2021-06-05 06:58:41,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170083 to 155420. [2021-06-05 06:58:41,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155420 states, 155419 states have (on average 2.926553381504192) internal successors, (454842), 155419 states have internal predecessors, (454842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:41,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155420 states to 155420 states and 454842 transitions. [2021-06-05 06:58:41,832 INFO L78 Accepts]: Start accepts. Automaton has 155420 states and 454842 transitions. Word has length 43 [2021-06-05 06:58:41,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:41,832 INFO L482 AbstractCegarLoop]: Abstraction has 155420 states and 454842 transitions. [2021-06-05 06:58:41,832 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:41,833 INFO L276 IsEmpty]: Start isEmpty. Operand 155420 states and 454842 transitions. [2021-06-05 06:58:42,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 06:58:42,060 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:42,060 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 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 06:58:42,261 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable270 [2021-06-05 06:58:42,261 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:42,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:42,261 INFO L82 PathProgramCache]: Analyzing trace with hash 351724844, now seen corresponding path program 174 times [2021-06-05 06:58:42,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:42,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622867196] [2021-06-05 06:58:42,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:42,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:42,306 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:42,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:42,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622867196] [2021-06-05 06:58:42,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622867196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:42,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157908235] [2021-06-05 06:58:42,307 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 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:42,337 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:58:42,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:42,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 06:58:42,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:42,441 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:42,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157908235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:42,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:42,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 06:58:42,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20224002] [2021-06-05 06:58:42,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:58:42,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:42,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:58:42,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:58:42,442 INFO L87 Difference]: Start difference. First operand 155420 states and 454842 transitions. Second operand has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 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 06:58:44,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:44,133 INFO L93 Difference]: Finished difference Result 180254 states and 524821 transitions. [2021-06-05 06:58:44,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 06:58:44,133 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 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 43 [2021-06-05 06:58:44,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:44,480 INFO L225 Difference]: With dead ends: 180254 [2021-06-05 06:58:44,480 INFO L226 Difference]: Without dead ends: 180236 [2021-06-05 06:58:44,480 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 361.3ms TimeCoverageRelationStatistics Valid=571, Invalid=1685, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 06:58:44,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180236 states. [2021-06-05 06:58:47,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180236 to 158892. [2021-06-05 06:58:47,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158892 states, 158891 states have (on average 2.927528934930235) internal successors, (465158), 158891 states have internal predecessors, (465158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:48,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158892 states to 158892 states and 465158 transitions. [2021-06-05 06:58:48,262 INFO L78 Accepts]: Start accepts. Automaton has 158892 states and 465158 transitions. Word has length 43 [2021-06-05 06:58:48,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:48,263 INFO L482 AbstractCegarLoop]: Abstraction has 158892 states and 465158 transitions. [2021-06-05 06:58:48,263 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 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 06:58:48,263 INFO L276 IsEmpty]: Start isEmpty. Operand 158892 states and 465158 transitions. [2021-06-05 06:58:48,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 06:58:48,515 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:48,515 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 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 06:58:48,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable271,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:48,729 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:48,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:48,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1080476662, now seen corresponding path program 175 times [2021-06-05 06:58:48,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:48,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217876846] [2021-06-05 06:58:48,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:48,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:48,777 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:48,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:48,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217876846] [2021-06-05 06:58:48,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217876846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:48,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182554319] [2021-06-05 06:58:48,778 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 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:48,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:48,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 06:58:48,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:48,944 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:48,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182554319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:48,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:48,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 06:58:48,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129864336] [2021-06-05 06:58:48,945 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:58:48,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:48,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:58:48,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:58:48,945 INFO L87 Difference]: Start difference. First operand 158892 states and 465158 transitions. Second operand has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 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 06:58:50,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:50,832 INFO L93 Difference]: Finished difference Result 178308 states and 515729 transitions. [2021-06-05 06:58:50,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 06:58:50,833 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 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 43 [2021-06-05 06:58:50,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:51,197 INFO L225 Difference]: With dead ends: 178308 [2021-06-05 06:58:51,197 INFO L226 Difference]: Without dead ends: 178273 [2021-06-05 06:58:51,197 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1786 ImplicationChecksByTransitivity, 618.6ms TimeCoverageRelationStatistics Valid=1351, Invalid=3341, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 06:58:51,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178273 states. [2021-06-05 06:58:54,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178273 to 151546. [2021-06-05 06:58:54,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151546 states, 151545 states have (on average 2.9152726912798177) internal successors, (441795), 151545 states have internal predecessors, (441795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:54,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151546 states to 151546 states and 441795 transitions. [2021-06-05 06:58:54,963 INFO L78 Accepts]: Start accepts. Automaton has 151546 states and 441795 transitions. Word has length 43 [2021-06-05 06:58:54,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:54,963 INFO L482 AbstractCegarLoop]: Abstraction has 151546 states and 441795 transitions. [2021-06-05 06:58:54,963 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 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 06:58:54,963 INFO L276 IsEmpty]: Start isEmpty. Operand 151546 states and 441795 transitions. [2021-06-05 06:58:55,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 06:58:55,189 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:55,189 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 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 06:58:55,389 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:55,390 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:55,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:55,390 INFO L82 PathProgramCache]: Analyzing trace with hash 703505508, now seen corresponding path program 176 times [2021-06-05 06:58:55,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:55,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833685131] [2021-06-05 06:58:55,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:55,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:55,430 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:55,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:55,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833685131] [2021-06-05 06:58:55,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833685131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:55,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211201079] [2021-06-05 06:58:55,431 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 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:55,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:58:55,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:55,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 06:58:55,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:55,550 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:55,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211201079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:55,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:55,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 06:58:55,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552662840] [2021-06-05 06:58:55,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:58:55,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:55,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:58:55,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:58:55,551 INFO L87 Difference]: Start difference. First operand 151546 states and 441795 transitions. Second operand has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 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 06:58:57,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:57,179 INFO L93 Difference]: Finished difference Result 159858 states and 464095 transitions. [2021-06-05 06:58:57,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 06:58:57,180 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 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 43 [2021-06-05 06:58:57,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:57,490 INFO L225 Difference]: With dead ends: 159858 [2021-06-05 06:58:57,490 INFO L226 Difference]: Without dead ends: 159844 [2021-06-05 06:58:57,490 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 345.2ms TimeCoverageRelationStatistics Valid=781, Invalid=1475, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 06:58:57,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159844 states. [2021-06-05 06:58:59,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159844 to 130016. [2021-06-05 06:58:59,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130016 states, 130015 states have (on average 2.9079413913779177) internal successors, (378076), 130015 states have internal predecessors, (378076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:00,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130016 states to 130016 states and 378076 transitions. [2021-06-05 06:59:00,291 INFO L78 Accepts]: Start accepts. Automaton has 130016 states and 378076 transitions. Word has length 43 [2021-06-05 06:59:00,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:00,291 INFO L482 AbstractCegarLoop]: Abstraction has 130016 states and 378076 transitions. [2021-06-05 06:59:00,291 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 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 06:59:00,291 INFO L276 IsEmpty]: Start isEmpty. Operand 130016 states and 378076 transitions. [2021-06-05 06:59:00,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 06:59:00,488 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:00,488 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 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 06:59:00,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:00,693 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:00,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:00,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1361898402, now seen corresponding path program 177 times [2021-06-05 06:59:00,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:00,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651822636] [2021-06-05 06:59:00,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:00,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:00,736 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:00,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:00,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651822636] [2021-06-05 06:59:00,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651822636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:00,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305975930] [2021-06-05 06:59:00,737 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 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:00,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 06:59:00,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:00,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 06:59:00,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:00,868 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:00,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305975930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:00,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:00,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 06:59:00,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925649376] [2021-06-05 06:59:00,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:59:00,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:00,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:59:00,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:59:00,869 INFO L87 Difference]: Start difference. First operand 130016 states and 378076 transitions. Second operand has 17 states, 17 states have (on average 3.588235294117647) internal successors, (61), 17 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:02,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:02,383 INFO L93 Difference]: Finished difference Result 144036 states and 416535 transitions. [2021-06-05 06:59:02,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 06:59:02,384 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.588235294117647) internal successors, (61), 17 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 06:59:02,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:02,646 INFO L225 Difference]: With dead ends: 144036 [2021-06-05 06:59:02,646 INFO L226 Difference]: Without dead ends: 143970 [2021-06-05 06:59:02,647 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 909.1ms TimeCoverageRelationStatistics Valid=631, Invalid=1439, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 06:59:02,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143970 states. [2021-06-05 06:59:05,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143970 to 129574. [2021-06-05 06:59:05,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129574 states, 129573 states have (on average 2.908576632477445) internal successors, (376873), 129573 states have internal predecessors, (376873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:05,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129574 states to 129574 states and 376873 transitions. [2021-06-05 06:59:05,417 INFO L78 Accepts]: Start accepts. Automaton has 129574 states and 376873 transitions. Word has length 43 [2021-06-05 06:59:05,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:05,417 INFO L482 AbstractCegarLoop]: Abstraction has 129574 states and 376873 transitions. [2021-06-05 06:59:05,417 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.588235294117647) internal successors, (61), 17 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:05,417 INFO L276 IsEmpty]: Start isEmpty. Operand 129574 states and 376873 transitions. [2021-06-05 06:59:05,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 06:59:05,611 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:05,611 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 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 06:59:05,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:05,811 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:05,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:05,811 INFO L82 PathProgramCache]: Analyzing trace with hash 1179331944, now seen corresponding path program 178 times [2021-06-05 06:59:05,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:05,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699343291] [2021-06-05 06:59:05,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:05,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:05,848 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:05,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:05,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699343291] [2021-06-05 06:59:05,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699343291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:05,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623795806] [2021-06-05 06:59:05,848 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 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:05,874 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:59:05,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:05,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 06:59:05,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:05,976 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:05,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623795806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:05,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:05,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-06-05 06:59:05,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739292250] [2021-06-05 06:59:05,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:59:05,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:05,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:59:05,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:59:05,977 INFO L87 Difference]: Start difference. First operand 129574 states and 376873 transitions. Second operand has 16 states, 16 states have (on average 3.8125) internal successors, (61), 16 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:06,522 WARN L205 SmtUtils]: Spent 495.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2021-06-05 06:59:07,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:07,554 INFO L93 Difference]: Finished difference Result 150350 states and 434516 transitions. [2021-06-05 06:59:07,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 06:59:07,554 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 16 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 06:59:07,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:07,837 INFO L225 Difference]: With dead ends: 150350 [2021-06-05 06:59:07,837 INFO L226 Difference]: Without dead ends: 150320 [2021-06-05 06:59:07,838 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 949.9ms TimeCoverageRelationStatistics Valid=682, Invalid=1574, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 06:59:07,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150320 states. [2021-06-05 06:59:10,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150320 to 131074. [2021-06-05 06:59:10,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131074 states, 131073 states have (on average 2.9083564120757135) internal successors, (381207), 131073 states have internal predecessors, (381207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:11,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131074 states to 131074 states and 381207 transitions. [2021-06-05 06:59:11,195 INFO L78 Accepts]: Start accepts. Automaton has 131074 states and 381207 transitions. Word has length 43 [2021-06-05 06:59:11,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:11,195 INFO L482 AbstractCegarLoop]: Abstraction has 131074 states and 381207 transitions. [2021-06-05 06:59:11,195 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 16 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:11,195 INFO L276 IsEmpty]: Start isEmpty. Operand 131074 states and 381207 transitions. [2021-06-05 06:59:11,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 06:59:11,778 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:11,778 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 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 06:59:12,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable275 [2021-06-05 06:59:12,001 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:12,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:12,001 INFO L82 PathProgramCache]: Analyzing trace with hash 81707166, now seen corresponding path program 179 times [2021-06-05 06:59:12,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:12,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180307320] [2021-06-05 06:59:12,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:12,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:12,073 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:12,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:12,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180307320] [2021-06-05 06:59:12,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180307320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:12,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418586460] [2021-06-05 06:59:12,074 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 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:12,135 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 06:59:12,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:12,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 06:59:12,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:12,255 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:12,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418586460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:12,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:12,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-06-05 06:59:12,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235266976] [2021-06-05 06:59:12,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:59:12,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:12,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:59:12,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:59:12,256 INFO L87 Difference]: Start difference. First operand 131074 states and 381207 transitions. Second operand has 16 states, 16 states have (on average 3.8125) internal successors, (61), 16 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:13,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:13,749 INFO L93 Difference]: Finished difference Result 165836 states and 478197 transitions. [2021-06-05 06:59:13,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 06:59:13,750 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 16 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 06:59:13,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:14,063 INFO L225 Difference]: With dead ends: 165836 [2021-06-05 06:59:14,063 INFO L226 Difference]: Without dead ends: 165824 [2021-06-05 06:59:14,064 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 735 ImplicationChecksByTransitivity, 596.6ms TimeCoverageRelationStatistics Valid=983, Invalid=2097, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 06:59:14,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165824 states. [2021-06-05 06:59:16,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165824 to 132962. [2021-06-05 06:59:16,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132962 states, 132961 states have (on average 2.906709486240326) internal successors, (386479), 132961 states have internal predecessors, (386479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:17,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132962 states to 132962 states and 386479 transitions. [2021-06-05 06:59:17,342 INFO L78 Accepts]: Start accepts. Automaton has 132962 states and 386479 transitions. Word has length 43 [2021-06-05 06:59:17,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:17,343 INFO L482 AbstractCegarLoop]: Abstraction has 132962 states and 386479 transitions. [2021-06-05 06:59:17,343 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 16 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:17,343 INFO L276 IsEmpty]: Start isEmpty. Operand 132962 states and 386479 transitions. [2021-06-05 06:59:17,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 06:59:17,528 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:17,529 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 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 06:59:17,729 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable276 [2021-06-05 06:59:17,729 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:17,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:17,729 INFO L82 PathProgramCache]: Analyzing trace with hash 981002536, now seen corresponding path program 180 times [2021-06-05 06:59:17,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:17,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696073857] [2021-06-05 06:59:17,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:17,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:17,765 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:17,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:17,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696073857] [2021-06-05 06:59:17,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696073857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:17,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342630833] [2021-06-05 06:59:17,766 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 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:17,793 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 06:59:17,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:17,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 06:59:17,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:17,893 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:17,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342630833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:17,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:17,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-06-05 06:59:17,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600175630] [2021-06-05 06:59:17,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:59:17,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:17,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:59:17,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:59:17,894 INFO L87 Difference]: Start difference. First operand 132962 states and 386479 transitions. Second operand has 16 states, 16 states have (on average 3.8125) internal successors, (61), 16 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:19,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:19,624 INFO L93 Difference]: Finished difference Result 162439 states and 469100 transitions. [2021-06-05 06:59:19,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 06:59:19,625 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 16 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 06:59:19,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:19,922 INFO L225 Difference]: With dead ends: 162439 [2021-06-05 06:59:19,922 INFO L226 Difference]: Without dead ends: 162439 [2021-06-05 06:59:19,922 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 931 ImplicationChecksByTransitivity, 518.4ms TimeCoverageRelationStatistics Valid=1190, Invalid=2350, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 06:59:20,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162439 states. [2021-06-05 06:59:22,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162439 to 140434. [2021-06-05 06:59:22,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140434 states, 140433 states have (on average 2.9111462405559947) internal successors, (408821), 140433 states have internal predecessors, (408821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:23,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140434 states to 140434 states and 408821 transitions. [2021-06-05 06:59:23,402 INFO L78 Accepts]: Start accepts. Automaton has 140434 states and 408821 transitions. Word has length 43 [2021-06-05 06:59:23,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:23,402 INFO L482 AbstractCegarLoop]: Abstraction has 140434 states and 408821 transitions. [2021-06-05 06:59:23,402 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 16 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:23,402 INFO L276 IsEmpty]: Start isEmpty. Operand 140434 states and 408821 transitions. [2021-06-05 06:59:23,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 06:59:23,698 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:23,698 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 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 06:59:23,899 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2021-06-05 06:59:23,899 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:23,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:23,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1122086154, now seen corresponding path program 181 times [2021-06-05 06:59:23,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:23,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079057136] [2021-06-05 06:59:23,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:23,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:23,936 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:59:23,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:23,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079057136] [2021-06-05 06:59:23,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079057136] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:23,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480116041] [2021-06-05 06:59:23,937 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 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:23,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:23,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 06:59:23,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:24,066 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:24,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480116041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:24,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:24,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-06-05 06:59:24,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574804851] [2021-06-05 06:59:24,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:59:24,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:24,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:59:24,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:59:24,067 INFO L87 Difference]: Start difference. First operand 140434 states and 408821 transitions. Second operand has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:25,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:25,132 INFO L93 Difference]: Finished difference Result 157083 states and 454504 transitions. [2021-06-05 06:59:25,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 06:59:25,132 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 06:59:25,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:25,422 INFO L225 Difference]: With dead ends: 157083 [2021-06-05 06:59:25,422 INFO L226 Difference]: Without dead ends: 157062 [2021-06-05 06:59:25,422 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 404.0ms TimeCoverageRelationStatistics Valid=847, Invalid=1703, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 06:59:26,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157062 states. [2021-06-05 06:59:28,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157062 to 122230. [2021-06-05 06:59:28,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122230 states, 122229 states have (on average 2.90133274427509) internal successors, (354627), 122229 states have internal predecessors, (354627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:28,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122230 states to 122230 states and 354627 transitions. [2021-06-05 06:59:28,802 INFO L78 Accepts]: Start accepts. Automaton has 122230 states and 354627 transitions. Word has length 43 [2021-06-05 06:59:28,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:28,802 INFO L482 AbstractCegarLoop]: Abstraction has 122230 states and 354627 transitions. [2021-06-05 06:59:28,802 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:28,802 INFO L276 IsEmpty]: Start isEmpty. Operand 122230 states and 354627 transitions. [2021-06-05 06:59:28,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 06:59:28,961 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:28,961 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 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 06:59:29,170 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2021-06-05 06:59:29,170 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:29,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:29,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1206484928, now seen corresponding path program 182 times [2021-06-05 06:59:29,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:29,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555362826] [2021-06-05 06:59:29,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:29,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:29,220 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:29,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:29,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555362826] [2021-06-05 06:59:29,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555362826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:29,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498749166] [2021-06-05 06:59:29,220 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 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:29,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:59:29,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:29,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 06:59:29,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:29,385 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:29,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498749166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:29,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:29,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 06:59:29,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818235998] [2021-06-05 06:59:29,386 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:59:29,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:29,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:59:29,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:59:29,387 INFO L87 Difference]: Start difference. First operand 122230 states and 354627 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:30,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:30,832 INFO L93 Difference]: Finished difference Result 142842 states and 411920 transitions. [2021-06-05 06:59:30,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 06:59:30,833 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 06:59:30,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:31,103 INFO L225 Difference]: With dead ends: 142842 [2021-06-05 06:59:31,103 INFO L226 Difference]: Without dead ends: 142786 [2021-06-05 06:59:31,104 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 371.7ms TimeCoverageRelationStatistics Valid=776, Invalid=1674, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 06:59:31,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142786 states. [2021-06-05 06:59:33,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142786 to 120606. [2021-06-05 06:59:33,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120606 states, 120605 states have (on average 2.9076489366112517) internal successors, (350677), 120605 states have internal predecessors, (350677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:33,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120606 states to 120606 states and 350677 transitions. [2021-06-05 06:59:33,678 INFO L78 Accepts]: Start accepts. Automaton has 120606 states and 350677 transitions. Word has length 43 [2021-06-05 06:59:33,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:33,678 INFO L482 AbstractCegarLoop]: Abstraction has 120606 states and 350677 transitions. [2021-06-05 06:59:33,678 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:33,678 INFO L276 IsEmpty]: Start isEmpty. Operand 120606 states and 350677 transitions. [2021-06-05 06:59:33,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 06:59:33,855 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:33,855 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 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 06:59:34,055 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 187 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2021-06-05 06:59:34,055 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:34,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:34,056 INFO L82 PathProgramCache]: Analyzing trace with hash -1475403872, now seen corresponding path program 183 times [2021-06-05 06:59:34,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:34,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722006899] [2021-06-05 06:59:34,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:34,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:34,104 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:34,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:34,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722006899] [2021-06-05 06:59:34,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722006899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:34,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472796044] [2021-06-05 06:59:34,104 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 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:34,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 06:59:34,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:34,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 06:59:34,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:34,247 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:34,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472796044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:34,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:34,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 06:59:34,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711265412] [2021-06-05 06:59:34,247 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:59:34,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:34,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:59:34,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:59:34,247 INFO L87 Difference]: Start difference. First operand 120606 states and 350677 transitions. Second operand has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:35,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:35,749 INFO L93 Difference]: Finished difference Result 132227 states and 382026 transitions. [2021-06-05 06:59:35,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 06:59:35,749 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 06:59:35,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:35,996 INFO L225 Difference]: With dead ends: 132227 [2021-06-05 06:59:35,996 INFO L226 Difference]: Without dead ends: 132161 [2021-06-05 06:59:35,996 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 421.0ms TimeCoverageRelationStatistics Valid=676, Invalid=1676, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 06:59:36,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132161 states. [2021-06-05 06:59:38,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132161 to 119216. [2021-06-05 06:59:38,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119216 states, 119215 states have (on average 2.907016734471333) internal successors, (346560), 119215 states have internal predecessors, (346560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:38,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119216 states to 119216 states and 346560 transitions. [2021-06-05 06:59:38,580 INFO L78 Accepts]: Start accepts. Automaton has 119216 states and 346560 transitions. Word has length 43 [2021-06-05 06:59:38,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:38,581 INFO L482 AbstractCegarLoop]: Abstraction has 119216 states and 346560 transitions. [2021-06-05 06:59:38,581 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:38,581 INFO L276 IsEmpty]: Start isEmpty. Operand 119216 states and 346560 transitions. [2021-06-05 06:59:38,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 06:59:38,754 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:38,754 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 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 06:59:38,954 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable280,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:38,954 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:38,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:38,955 INFO L82 PathProgramCache]: Analyzing trace with hash 1857040322, now seen corresponding path program 184 times [2021-06-05 06:59:38,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:38,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111721003] [2021-06-05 06:59:38,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:38,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:38,990 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:38,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:38,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111721003] [2021-06-05 06:59:38,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111721003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:38,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158895687] [2021-06-05 06:59:38,990 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 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:39,016 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:59:39,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:39,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 06:59:39,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:39,127 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:39,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158895687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:39,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:39,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 06:59:39,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5156071] [2021-06-05 06:59:39,128 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:59:39,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:39,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:59:39,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:59:39,128 INFO L87 Difference]: Start difference. First operand 119216 states and 346560 transitions. Second operand has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 17 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:40,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:40,665 INFO L93 Difference]: Finished difference Result 148054 states and 426823 transitions. [2021-06-05 06:59:40,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 06:59:40,665 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 17 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 06:59:40,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:40,935 INFO L225 Difference]: With dead ends: 148054 [2021-06-05 06:59:40,935 INFO L226 Difference]: Without dead ends: 148024 [2021-06-05 06:59:40,935 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 431.5ms TimeCoverageRelationStatistics Valid=732, Invalid=1718, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 06:59:41,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148024 states. [2021-06-05 06:59:43,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148024 to 120930. [2021-06-05 06:59:43,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120930 states, 120929 states have (on average 2.9046713360732332) internal successors, (351259), 120929 states have internal predecessors, (351259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:43,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120930 states to 120930 states and 351259 transitions. [2021-06-05 06:59:43,572 INFO L78 Accepts]: Start accepts. Automaton has 120930 states and 351259 transitions. Word has length 43 [2021-06-05 06:59:43,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:43,572 INFO L482 AbstractCegarLoop]: Abstraction has 120930 states and 351259 transitions. [2021-06-05 06:59:43,572 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 17 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:43,572 INFO L276 IsEmpty]: Start isEmpty. Operand 120930 states and 351259 transitions. [2021-06-05 06:59:43,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 06:59:43,743 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:43,743 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 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 06:59:43,943 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable281,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:43,943 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:43,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:43,943 INFO L82 PathProgramCache]: Analyzing trace with hash 228319968, now seen corresponding path program 185 times [2021-06-05 06:59:43,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:43,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399749619] [2021-06-05 06:59:43,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:43,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:43,974 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:43,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:43,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399749619] [2021-06-05 06:59:43,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399749619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:43,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861946917] [2021-06-05 06:59:43,974 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 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:44,001 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 06:59:44,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:44,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 06:59:44,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:44,109 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:44,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861946917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:44,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:44,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 16 [2021-06-05 06:59:44,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149151721] [2021-06-05 06:59:44,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:59:44,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:44,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:59:44,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:59:44,110 INFO L87 Difference]: Start difference. First operand 120930 states and 351259 transitions. Second operand has 16 states, 16 states have (on average 4.0) internal successors, (64), 16 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:45,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:45,803 INFO L93 Difference]: Finished difference Result 167645 states and 483468 transitions. [2021-06-05 06:59:45,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 06:59:45,803 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.0) internal successors, (64), 16 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 06:59:45,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:46,123 INFO L225 Difference]: With dead ends: 167645 [2021-06-05 06:59:46,124 INFO L226 Difference]: Without dead ends: 167639 [2021-06-05 06:59:46,124 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 786 ImplicationChecksByTransitivity, 502.0ms TimeCoverageRelationStatistics Valid=975, Invalid=1995, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 06:59:46,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167639 states. [2021-06-05 06:59:48,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167639 to 127822. [2021-06-05 06:59:48,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127822 states, 127821 states have (on average 2.902879808482174) internal successors, (371049), 127821 states have internal predecessors, (371049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:49,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127822 states to 127822 states and 371049 transitions. [2021-06-05 06:59:49,261 INFO L78 Accepts]: Start accepts. Automaton has 127822 states and 371049 transitions. Word has length 43 [2021-06-05 06:59:49,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:49,261 INFO L482 AbstractCegarLoop]: Abstraction has 127822 states and 371049 transitions. [2021-06-05 06:59:49,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.0) internal successors, (64), 16 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:49,262 INFO L276 IsEmpty]: Start isEmpty. Operand 127822 states and 371049 transitions. [2021-06-05 06:59:49,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 06:59:49,878 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:49,879 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 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 06:59:50,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable282 [2021-06-05 06:59:50,093 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:50,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:50,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1707881602, now seen corresponding path program 186 times [2021-06-05 06:59:50,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:50,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33386478] [2021-06-05 06:59:50,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:50,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:50,132 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:50,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:50,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33386478] [2021-06-05 06:59:50,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33386478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:50,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926859887] [2021-06-05 06:59:50,132 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:50,159 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 06:59:50,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:50,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 06:59:50,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:50,265 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:50,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926859887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:50,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:50,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 16 [2021-06-05 06:59:50,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861291694] [2021-06-05 06:59:50,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:59:50,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:50,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:59:50,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:59:50,266 INFO L87 Difference]: Start difference. First operand 127822 states and 371049 transitions. Second operand has 16 states, 16 states have (on average 4.0) internal successors, (64), 16 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:51,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:51,559 INFO L93 Difference]: Finished difference Result 170745 states and 491050 transitions. [2021-06-05 06:59:51,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 06:59:51,559 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.0) internal successors, (64), 16 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 06:59:51,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:52,435 INFO L225 Difference]: With dead ends: 170745 [2021-06-05 06:59:52,435 INFO L226 Difference]: Without dead ends: 170745 [2021-06-05 06:59:52,436 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1388 ImplicationChecksByTransitivity, 615.2ms TimeCoverageRelationStatistics Valid=1526, Invalid=3030, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 06:59:52,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170745 states. [2021-06-05 06:59:54,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170745 to 138414. [2021-06-05 06:59:54,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138414 states, 138413 states have (on average 2.904980023552701) internal successors, (402087), 138413 states have internal predecessors, (402087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:55,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138414 states to 138414 states and 402087 transitions. [2021-06-05 06:59:55,304 INFO L78 Accepts]: Start accepts. Automaton has 138414 states and 402087 transitions. Word has length 43 [2021-06-05 06:59:55,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:55,304 INFO L482 AbstractCegarLoop]: Abstraction has 138414 states and 402087 transitions. [2021-06-05 06:59:55,304 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.0) internal successors, (64), 16 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:55,304 INFO L276 IsEmpty]: Start isEmpty. Operand 138414 states and 402087 transitions. [2021-06-05 06:59:55,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 06:59:55,502 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:55,502 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 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 06:59:55,702 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:55,702 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:55,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:55,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1848965220, now seen corresponding path program 187 times [2021-06-05 06:59:55,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:55,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617257615] [2021-06-05 06:59:55,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:55,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:55,733 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:59:55,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:55,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617257615] [2021-06-05 06:59:55,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617257615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:55,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167623509] [2021-06-05 06:59:55,733 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 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:55,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:55,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 06:59:55,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:55,872 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 21 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:55,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167623509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:55,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:55,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 16 [2021-06-05 06:59:55,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042291074] [2021-06-05 06:59:55,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:59:55,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:55,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:59:55,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:59:55,873 INFO L87 Difference]: Start difference. First operand 138414 states and 402087 transitions. Second operand has 16 states, 16 states have (on average 3.6875) internal successors, (59), 16 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:56,553 WARN L205 SmtUtils]: Spent 560.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 7 [2021-06-05 06:59:57,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:57,728 INFO L93 Difference]: Finished difference Result 166155 states and 478574 transitions. [2021-06-05 06:59:57,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 06:59:57,729 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 16 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 06:59:57,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:58,035 INFO L225 Difference]: With dead ends: 166155 [2021-06-05 06:59:58,035 INFO L226 Difference]: Without dead ends: 166134 [2021-06-05 06:59:58,035 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 829 ImplicationChecksByTransitivity, 1084.1ms TimeCoverageRelationStatistics Valid=1030, Invalid=2162, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 06:59:58,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166134 states. [2021-06-05 07:00:01,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166134 to 132754. [2021-06-05 07:00:01,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132754 states, 132753 states have (on average 2.90065761225735) internal successors, (385071), 132753 states have internal predecessors, (385071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:01,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132754 states to 132754 states and 385071 transitions. [2021-06-05 07:00:01,688 INFO L78 Accepts]: Start accepts. Automaton has 132754 states and 385071 transitions. Word has length 43 [2021-06-05 07:00:01,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:01,688 INFO L482 AbstractCegarLoop]: Abstraction has 132754 states and 385071 transitions. [2021-06-05 07:00:01,688 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 16 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:01,688 INFO L276 IsEmpty]: Start isEmpty. Operand 132754 states and 385071 transitions. [2021-06-05 07:00:01,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 07:00:01,890 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:01,890 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 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 07:00:02,090 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:02,090 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:02,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:02,091 INFO L82 PathProgramCache]: Analyzing trace with hash 1933363994, now seen corresponding path program 188 times [2021-06-05 07:00:02,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:02,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931555318] [2021-06-05 07:00:02,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:02,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:02,143 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:00:02,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:02,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931555318] [2021-06-05 07:00:02,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931555318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:02,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525223887] [2021-06-05 07:00:02,143 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 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:02,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:00:02,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:02,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 07:00:02,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:02,369 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:02,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525223887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:02,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:02,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 07:00:02,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368942263] [2021-06-05 07:00:02,369 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:00:02,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:02,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:00:02,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:00:02,370 INFO L87 Difference]: Start difference. First operand 132754 states and 385071 transitions. Second operand has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:04,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:04,033 INFO L93 Difference]: Finished difference Result 165237 states and 475345 transitions. [2021-06-05 07:00:04,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 07:00:04,034 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 07:00:04,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:04,371 INFO L225 Difference]: With dead ends: 165237 [2021-06-05 07:00:04,372 INFO L226 Difference]: Without dead ends: 165153 [2021-06-05 07:00:04,372 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 452.5ms TimeCoverageRelationStatistics Valid=877, Invalid=1985, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 07:00:04,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165153 states. [2021-06-05 07:00:07,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165153 to 132063. [2021-06-05 07:00:07,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132063 states, 132062 states have (on average 2.9023564689312598) internal successors, (383291), 132062 states have internal predecessors, (383291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:07,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132063 states to 132063 states and 383291 transitions. [2021-06-05 07:00:07,476 INFO L78 Accepts]: Start accepts. Automaton has 132063 states and 383291 transitions. Word has length 43 [2021-06-05 07:00:07,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:07,476 INFO L482 AbstractCegarLoop]: Abstraction has 132063 states and 383291 transitions. [2021-06-05 07:00:07,476 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:07,476 INFO L276 IsEmpty]: Start isEmpty. Operand 132063 states and 383291 transitions. [2021-06-05 07:00:08,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 07:00:08,166 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:08,166 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 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 07:00:08,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:08,401 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:08,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:08,401 INFO L82 PathProgramCache]: Analyzing trace with hash -721565792, now seen corresponding path program 189 times [2021-06-05 07:00:08,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:08,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703350055] [2021-06-05 07:00:08,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:08,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:08,445 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:08,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:08,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703350055] [2021-06-05 07:00:08,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703350055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:08,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421247688] [2021-06-05 07:00:08,446 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 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:08,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 07:00:08,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:08,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 07:00:08,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:08,599 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:08,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421247688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:08,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:08,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 07:00:08,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700038855] [2021-06-05 07:00:08,600 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:00:08,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:08,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:00:08,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:00:08,600 INFO L87 Difference]: Start difference. First operand 132063 states and 383291 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:10,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:10,049 INFO L93 Difference]: Finished difference Result 165113 states and 474768 transitions. [2021-06-05 07:00:10,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 07:00:10,050 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 07:00:10,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:10,462 INFO L225 Difference]: With dead ends: 165113 [2021-06-05 07:00:10,463 INFO L226 Difference]: Without dead ends: 165015 [2021-06-05 07:00:10,463 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 634 ImplicationChecksByTransitivity, 397.6ms TimeCoverageRelationStatistics Valid=746, Invalid=1804, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 07:00:10,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165015 states. [2021-06-05 07:00:13,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165015 to 133988. [2021-06-05 07:00:13,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133988 states, 133987 states have (on average 2.903714539470247) internal successors, (389060), 133987 states have internal predecessors, (389060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:13,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133988 states to 133988 states and 389060 transitions. [2021-06-05 07:00:13,673 INFO L78 Accepts]: Start accepts. Automaton has 133988 states and 389060 transitions. Word has length 43 [2021-06-05 07:00:13,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:13,673 INFO L482 AbstractCegarLoop]: Abstraction has 133988 states and 389060 transitions. [2021-06-05 07:00:13,673 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:13,673 INFO L276 IsEmpty]: Start isEmpty. Operand 133988 states and 389060 transitions. [2021-06-05 07:00:14,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 07:00:14,498 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:14,498 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 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 07:00:14,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:14,713 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:14,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:14,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1517368606, now seen corresponding path program 190 times [2021-06-05 07:00:14,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:14,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719724363] [2021-06-05 07:00:14,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:14,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:14,776 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:14,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:14,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719724363] [2021-06-05 07:00:14,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719724363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:14,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354139486] [2021-06-05 07:00:14,776 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 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:14,804 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:00:14,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:14,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 07:00:14,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:14,937 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:14,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354139486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:14,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:14,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 07:00:14,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035369728] [2021-06-05 07:00:14,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 07:00:14,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:14,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 07:00:14,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:00:14,938 INFO L87 Difference]: Start difference. First operand 133988 states and 389060 transitions. Second operand has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 19 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:16,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:16,016 INFO L93 Difference]: Finished difference Result 149805 states and 432340 transitions. [2021-06-05 07:00:16,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 07:00:16,017 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 19 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 07:00:16,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:16,338 INFO L225 Difference]: With dead ends: 149805 [2021-06-05 07:00:16,338 INFO L226 Difference]: Without dead ends: 149739 [2021-06-05 07:00:16,339 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 465.1ms TimeCoverageRelationStatistics Valid=708, Invalid=1842, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 07:00:16,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149739 states. [2021-06-05 07:00:19,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149739 to 136196. [2021-06-05 07:00:19,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136196 states, 136195 states have (on average 2.900356107052388) internal successors, (395014), 136195 states have internal predecessors, (395014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:20,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136196 states to 136196 states and 395014 transitions. [2021-06-05 07:00:20,047 INFO L78 Accepts]: Start accepts. Automaton has 136196 states and 395014 transitions. Word has length 43 [2021-06-05 07:00:20,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:20,048 INFO L482 AbstractCegarLoop]: Abstraction has 136196 states and 395014 transitions. [2021-06-05 07:00:20,048 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 19 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:20,048 INFO L276 IsEmpty]: Start isEmpty. Operand 136196 states and 395014 transitions. [2021-06-05 07:00:20,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 07:00:20,269 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:20,269 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 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 07:00:20,469 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable287 [2021-06-05 07:00:20,469 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:20,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:20,470 INFO L82 PathProgramCache]: Analyzing trace with hash 826070824, now seen corresponding path program 191 times [2021-06-05 07:00:20,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:20,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131253721] [2021-06-05 07:00:20,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:20,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:20,508 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:20,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:20,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131253721] [2021-06-05 07:00:20,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131253721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:20,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521802861] [2021-06-05 07:00:20,509 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 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:20,536 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 07:00:20,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:20,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 07:00:20,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:20,667 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:20,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521802861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:20,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:20,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 07:00:20,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016039196] [2021-06-05 07:00:20,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:00:20,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:20,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:00:20,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:00:20,668 INFO L87 Difference]: Start difference. First operand 136196 states and 395014 transitions. Second operand has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 18 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:22,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:22,387 INFO L93 Difference]: Finished difference Result 170919 states and 492163 transitions. [2021-06-05 07:00:22,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 07:00:22,387 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 18 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 07:00:22,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:22,739 INFO L225 Difference]: With dead ends: 170919 [2021-06-05 07:00:22,739 INFO L226 Difference]: Without dead ends: 170889 [2021-06-05 07:00:22,739 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 798 ImplicationChecksByTransitivity, 486.2ms TimeCoverageRelationStatistics Valid=809, Invalid=2053, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 07:00:22,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170889 states. [2021-06-05 07:00:25,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170889 to 142906. [2021-06-05 07:00:25,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142906 states, 142905 states have (on average 2.900143451943599) internal successors, (414445), 142905 states have internal predecessors, (414445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:25,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142906 states to 142906 states and 414445 transitions. [2021-06-05 07:00:25,683 INFO L78 Accepts]: Start accepts. Automaton has 142906 states and 414445 transitions. Word has length 43 [2021-06-05 07:00:25,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:25,683 INFO L482 AbstractCegarLoop]: Abstraction has 142906 states and 414445 transitions. [2021-06-05 07:00:25,683 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 18 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:25,683 INFO L276 IsEmpty]: Start isEmpty. Operand 142906 states and 414445 transitions. [2021-06-05 07:00:25,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 07:00:25,897 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:25,897 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 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 07:00:26,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2021-06-05 07:00:26,098 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:26,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:26,098 INFO L82 PathProgramCache]: Analyzing trace with hash -11435682, now seen corresponding path program 192 times [2021-06-05 07:00:26,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:26,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129652947] [2021-06-05 07:00:26,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:26,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:26,128 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:26,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:26,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129652947] [2021-06-05 07:00:26,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129652947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:26,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157884182] [2021-06-05 07:00:26,129 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 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:26,156 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 07:00:26,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:26,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 07:00:26,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:26,696 WARN L205 SmtUtils]: Spent 538.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2021-06-05 07:00:26,909 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:26,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157884182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:26,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:26,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 07:00:26,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349529669] [2021-06-05 07:00:26,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:00:26,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:26,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:00:26,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:00:26,911 INFO L87 Difference]: Start difference. First operand 142906 states and 414445 transitions. Second operand has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 17 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:28,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:28,300 INFO L93 Difference]: Finished difference Result 189714 states and 547144 transitions. [2021-06-05 07:00:28,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 07:00:28,300 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 17 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 07:00:28,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:28,668 INFO L225 Difference]: With dead ends: 189714 [2021-06-05 07:00:28,668 INFO L226 Difference]: Without dead ends: 189708 [2021-06-05 07:00:28,669 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1353 ImplicationChecksByTransitivity, 645.4ms TimeCoverageRelationStatistics Valid=1227, Invalid=2679, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 07:00:29,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189708 states. [2021-06-05 07:00:31,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189708 to 154668. [2021-06-05 07:00:32,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154668 states, 154667 states have (on average 2.8988601317669573) internal successors, (448358), 154667 states have internal predecessors, (448358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:32,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154668 states to 154668 states and 448358 transitions. [2021-06-05 07:00:32,526 INFO L78 Accepts]: Start accepts. Automaton has 154668 states and 448358 transitions. Word has length 43 [2021-06-05 07:00:32,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:32,526 INFO L482 AbstractCegarLoop]: Abstraction has 154668 states and 448358 transitions. [2021-06-05 07:00:32,526 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 17 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:32,527 INFO L276 IsEmpty]: Start isEmpty. Operand 154668 states and 448358 transitions. [2021-06-05 07:00:33,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 07:00:33,351 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:33,351 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 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 07:00:33,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2021-06-05 07:00:33,581 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:33,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:33,581 INFO L82 PathProgramCache]: Analyzing trace with hash 937030376, now seen corresponding path program 193 times [2021-06-05 07:00:33,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:33,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269637693] [2021-06-05 07:00:33,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:33,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:33,635 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:33,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:33,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269637693] [2021-06-05 07:00:33,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269637693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:33,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494606132] [2021-06-05 07:00:33,635 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 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:33,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:33,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 07:00:33,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:33,778 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:33,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494606132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:33,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:33,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 16 [2021-06-05 07:00:33,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639191298] [2021-06-05 07:00:33,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:00:33,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:33,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:00:33,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:00:33,779 INFO L87 Difference]: Start difference. First operand 154668 states and 448358 transitions. Second operand has 16 states, 16 states have (on average 4.1875) internal successors, (67), 16 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:35,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:35,365 INFO L93 Difference]: Finished difference Result 222961 states and 642150 transitions. [2021-06-05 07:00:35,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 07:00:35,365 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.1875) internal successors, (67), 16 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 07:00:35,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:36,561 INFO L225 Difference]: With dead ends: 222961 [2021-06-05 07:00:36,561 INFO L226 Difference]: Without dead ends: 222961 [2021-06-05 07:00:36,562 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1617 ImplicationChecksByTransitivity, 616.1ms TimeCoverageRelationStatistics Valid=1414, Invalid=2876, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 07:00:36,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222961 states. [2021-06-05 07:00:40,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222961 to 194204. [2021-06-05 07:00:40,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194204 states, 194203 states have (on average 2.8963198302806856) internal successors, (562474), 194203 states have internal predecessors, (562474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:41,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194204 states to 194204 states and 562474 transitions. [2021-06-05 07:00:41,132 INFO L78 Accepts]: Start accepts. Automaton has 194204 states and 562474 transitions. Word has length 43 [2021-06-05 07:00:41,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:41,133 INFO L482 AbstractCegarLoop]: Abstraction has 194204 states and 562474 transitions. [2021-06-05 07:00:41,133 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.1875) internal successors, (67), 16 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:41,133 INFO L276 IsEmpty]: Start isEmpty. Operand 194204 states and 562474 transitions. [2021-06-05 07:00:42,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 07:00:42,210 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:42,210 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 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 07:00:42,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:42,429 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:42,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:42,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1078113994, now seen corresponding path program 194 times [2021-06-05 07:00:42,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:42,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331321014] [2021-06-05 07:00:42,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:42,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:42,459 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:00:42,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:42,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331321014] [2021-06-05 07:00:42,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331321014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:42,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739068436] [2021-06-05 07:00:42,459 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 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:42,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:00:42,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:42,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 07:00:42,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:42,608 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:42,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739068436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:42,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:42,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 16 [2021-06-05 07:00:42,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198680868] [2021-06-05 07:00:42,608 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:00:42,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:42,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:00:42,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:00:42,609 INFO L87 Difference]: Start difference. First operand 194204 states and 562474 transitions. Second operand has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:44,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:44,044 INFO L93 Difference]: Finished difference Result 220222 states and 634358 transitions. [2021-06-05 07:00:44,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 07:00:44,045 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 07:00:44,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:45,225 INFO L225 Difference]: With dead ends: 220222 [2021-06-05 07:00:45,225 INFO L226 Difference]: Without dead ends: 220208 [2021-06-05 07:00:45,225 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1198 ImplicationChecksByTransitivity, 530.6ms TimeCoverageRelationStatistics Valid=1091, Invalid=2449, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 07:00:45,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220208 states. [2021-06-05 07:00:49,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220208 to 192400. [2021-06-05 07:00:49,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192400 states, 192399 states have (on average 2.8951605777576805) internal successors, (557026), 192399 states have internal predecessors, (557026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:49,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192400 states to 192400 states and 557026 transitions. [2021-06-05 07:00:49,807 INFO L78 Accepts]: Start accepts. Automaton has 192400 states and 557026 transitions. Word has length 43 [2021-06-05 07:00:49,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:49,807 INFO L482 AbstractCegarLoop]: Abstraction has 192400 states and 557026 transitions. [2021-06-05 07:00:49,807 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:49,807 INFO L276 IsEmpty]: Start isEmpty. Operand 192400 states and 557026 transitions. [2021-06-05 07:00:50,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 07:00:50,768 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:50,769 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 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 07:00:50,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable291,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:50,985 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:50,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:50,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1162512768, now seen corresponding path program 195 times [2021-06-05 07:00:50,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:50,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522954186] [2021-06-05 07:00:50,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:50,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:51,018 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:00:51,018 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:51,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522954186] [2021-06-05 07:00:51,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522954186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:51,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890797714] [2021-06-05 07:00:51,019 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 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:51,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 07:00:51,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:51,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 07:00:51,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:51,165 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:51,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890797714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:51,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:51,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 07:00:51,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847346797] [2021-06-05 07:00:51,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:00:51,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:51,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:00:51,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:00:51,166 INFO L87 Difference]: Start difference. First operand 192400 states and 557026 transitions. Second operand has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:52,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:52,545 INFO L93 Difference]: Finished difference Result 221539 states and 638003 transitions. [2021-06-05 07:00:52,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 07:00:52,546 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 07:00:52,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:53,653 INFO L225 Difference]: With dead ends: 221539 [2021-06-05 07:00:53,653 INFO L226 Difference]: Without dead ends: 221483 [2021-06-05 07:00:53,654 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1033 ImplicationChecksByTransitivity, 483.2ms TimeCoverageRelationStatistics Valid=940, Invalid=2252, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 07:00:53,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221483 states. [2021-06-05 07:00:57,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221483 to 195688. [2021-06-05 07:00:57,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195688 states, 195687 states have (on average 2.894111514817029) internal successors, (566340), 195687 states have internal predecessors, (566340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:58,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195688 states to 195688 states and 566340 transitions. [2021-06-05 07:00:58,234 INFO L78 Accepts]: Start accepts. Automaton has 195688 states and 566340 transitions. Word has length 43 [2021-06-05 07:00:58,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:58,234 INFO L482 AbstractCegarLoop]: Abstraction has 195688 states and 566340 transitions. [2021-06-05 07:00:58,234 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:58,234 INFO L276 IsEmpty]: Start isEmpty. Operand 195688 states and 566340 transitions. [2021-06-05 07:00:58,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 07:00:58,545 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:58,545 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 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 07:00:58,746 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable292 [2021-06-05 07:00:58,746 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:58,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:58,746 INFO L82 PathProgramCache]: Analyzing trace with hash -1492417018, now seen corresponding path program 196 times [2021-06-05 07:00:58,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:58,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988013962] [2021-06-05 07:00:58,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:58,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:58,784 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:00:58,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:58,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988013962] [2021-06-05 07:00:58,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988013962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:58,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454119655] [2021-06-05 07:00:58,785 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 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:58,811 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:00:58,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:58,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 07:00:58,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:58,929 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:58,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454119655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:58,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:58,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 07:00:58,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171586953] [2021-06-05 07:00:58,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:00:58,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:58,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:00:58,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:00:58,930 INFO L87 Difference]: Start difference. First operand 195688 states and 566340 transitions. Second operand has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 18 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:01,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:01,085 INFO L93 Difference]: Finished difference Result 229009 states and 659218 transitions. [2021-06-05 07:01:01,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 07:01:01,085 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 18 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 07:01:01,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:01,558 INFO L225 Difference]: With dead ends: 229009 [2021-06-05 07:01:01,558 INFO L226 Difference]: Without dead ends: 228911 [2021-06-05 07:01:01,558 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 484.7ms TimeCoverageRelationStatistics Valid=806, Invalid=2056, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 07:01:02,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228911 states. [2021-06-05 07:01:06,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228911 to 202580. [2021-06-05 07:01:06,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202580 states, 202579 states have (on average 2.892817123196383) internal successors, (586024), 202579 states have internal predecessors, (586024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:06,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202580 states to 202580 states and 586024 transitions. [2021-06-05 07:01:06,988 INFO L78 Accepts]: Start accepts. Automaton has 202580 states and 586024 transitions. Word has length 43 [2021-06-05 07:01:06,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:06,988 INFO L482 AbstractCegarLoop]: Abstraction has 202580 states and 586024 transitions. [2021-06-05 07:01:06,988 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 18 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:06,988 INFO L276 IsEmpty]: Start isEmpty. Operand 202580 states and 586024 transitions. [2021-06-05 07:01:07,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 07:01:07,274 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:07,274 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 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 07:01:07,475 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable293,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:07,475 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:07,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:07,475 INFO L82 PathProgramCache]: Analyzing trace with hash 1612051392, now seen corresponding path program 197 times [2021-06-05 07:01:07,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:07,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976068361] [2021-06-05 07:01:07,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:07,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:07,524 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:07,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:07,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976068361] [2021-06-05 07:01:07,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976068361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:07,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558054639] [2021-06-05 07:01:07,525 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 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:07,551 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 07:01:07,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:01:07,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 07:01:07,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:01:08,412 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:08,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558054639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:08,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:08,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 07:01:08,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931818208] [2021-06-05 07:01:08,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 07:01:08,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:08,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 07:01:08,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:01:08,413 INFO L87 Difference]: Start difference. First operand 202580 states and 586024 transitions. Second operand has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:09,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:09,788 INFO L93 Difference]: Finished difference Result 232294 states and 668787 transitions. [2021-06-05 07:01:09,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 07:01:09,788 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 07:01:09,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:10,267 INFO L225 Difference]: With dead ends: 232294 [2021-06-05 07:01:10,267 INFO L226 Difference]: Without dead ends: 232154 [2021-06-05 07:01:10,267 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 751 ImplicationChecksByTransitivity, 433.2ms TimeCoverageRelationStatistics Valid=694, Invalid=1856, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 07:01:11,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232154 states. [2021-06-05 07:01:15,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232154 to 206255. [2021-06-05 07:01:15,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206255 states, 206254 states have (on average 2.892002094504834) internal successors, (596487), 206254 states have internal predecessors, (596487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:16,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206255 states to 206255 states and 596487 transitions. [2021-06-05 07:01:16,394 INFO L78 Accepts]: Start accepts. Automaton has 206255 states and 596487 transitions. Word has length 43 [2021-06-05 07:01:16,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:16,394 INFO L482 AbstractCegarLoop]: Abstraction has 206255 states and 596487 transitions. [2021-06-05 07:01:16,394 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:16,394 INFO L276 IsEmpty]: Start isEmpty. Operand 206255 states and 596487 transitions. [2021-06-05 07:01:16,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-05 07:01:16,732 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:16,732 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 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 07:01:16,933 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:16,933 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:16,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:16,933 INFO L82 PathProgramCache]: Analyzing trace with hash 993831136, now seen corresponding path program 198 times [2021-06-05 07:01:16,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:16,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556200006] [2021-06-05 07:01:16,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:16,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:17,140 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:17,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:17,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556200006] [2021-06-05 07:01:17,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556200006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:17,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882443357] [2021-06-05 07:01:17,140 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 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:17,167 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 07:01:17,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:01:17,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:01:17,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:01:18,090 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:18,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882443357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:18,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:18,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 23 [2021-06-05 07:01:18,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617415465] [2021-06-05 07:01:18,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 07:01:18,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:18,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 07:01:18,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-06-05 07:01:18,091 INFO L87 Difference]: Start difference. First operand 206255 states and 596487 transitions. Second operand has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 23 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:19,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:19,544 INFO L93 Difference]: Finished difference Result 283800 states and 818276 transitions. [2021-06-05 07:01:19,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 07:01:19,545 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 23 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-06-05 07:01:19,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:20,760 INFO L225 Difference]: With dead ends: 283800 [2021-06-05 07:01:20,760 INFO L226 Difference]: Without dead ends: 283762 [2021-06-05 07:01:20,761 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 1164.1ms TimeCoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2021-06-05 07:01:20,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283762 states. [2021-06-05 07:01:24,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283762 to 206283. [2021-06-05 07:01:24,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206283 states, 206282 states have (on average 2.8919004081790947) internal successors, (596547), 206282 states have internal predecessors, (596547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:25,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206283 states to 206283 states and 596547 transitions. [2021-06-05 07:01:25,386 INFO L78 Accepts]: Start accepts. Automaton has 206283 states and 596547 transitions. Word has length 46 [2021-06-05 07:01:25,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:25,386 INFO L482 AbstractCegarLoop]: Abstraction has 206283 states and 596547 transitions. [2021-06-05 07:01:25,386 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 23 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:25,386 INFO L276 IsEmpty]: Start isEmpty. Operand 206283 states and 596547 transitions. [2021-06-05 07:01:25,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-05 07:01:25,718 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:25,718 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 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 07:01:25,919 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:25,919 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:25,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:25,919 INFO L82 PathProgramCache]: Analyzing trace with hash -290942774, now seen corresponding path program 199 times [2021-06-05 07:01:25,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:25,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377746778] [2021-06-05 07:01:25,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:25,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:26,087 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:26,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:26,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377746778] [2021-06-05 07:01:26,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377746778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:26,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608795095] [2021-06-05 07:01:26,088 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 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:26,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:26,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 07:01:26,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:01:27,018 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:27,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608795095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:27,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:27,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-05 07:01:27,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574170359] [2021-06-05 07:01:27,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 07:01:27,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:27,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 07:01:27,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:01:27,019 INFO L87 Difference]: Start difference. First operand 206283 states and 596547 transitions. Second operand has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:29,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:29,232 INFO L93 Difference]: Finished difference Result 306545 states and 884487 transitions. [2021-06-05 07:01:29,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 07:01:29,245 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-06-05 07:01:29,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:29,922 INFO L225 Difference]: With dead ends: 306545 [2021-06-05 07:01:29,922 INFO L226 Difference]: Without dead ends: 306463 [2021-06-05 07:01:29,922 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 1112.9ms TimeCoverageRelationStatistics Valid=136, Invalid=1124, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 07:01:30,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306463 states. [2021-06-05 07:01:33,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306463 to 226606. [2021-06-05 07:01:34,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226606 states, 226605 states have (on average 2.8947110610975044) internal successors, (655956), 226605 states have internal predecessors, (655956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:35,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226606 states to 226606 states and 655956 transitions. [2021-06-05 07:01:35,446 INFO L78 Accepts]: Start accepts. Automaton has 226606 states and 655956 transitions. Word has length 46 [2021-06-05 07:01:35,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:35,446 INFO L482 AbstractCegarLoop]: Abstraction has 226606 states and 655956 transitions. [2021-06-05 07:01:35,446 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:35,446 INFO L276 IsEmpty]: Start isEmpty. Operand 226606 states and 655956 transitions. [2021-06-05 07:01:35,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-05 07:01:35,841 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:35,841 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 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 07:01:36,042 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:36,042 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:36,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:36,042 INFO L82 PathProgramCache]: Analyzing trace with hash 305163142, now seen corresponding path program 200 times [2021-06-05 07:01:36,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:36,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176230380] [2021-06-05 07:01:36,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:36,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:36,234 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:36,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:36,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176230380] [2021-06-05 07:01:36,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176230380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:36,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190062737] [2021-06-05 07:01:36,234 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 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:36,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:01:36,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:01:36,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 07:01:36,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:01:36,466 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:36,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190062737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:36,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:36,466 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-05 07:01:36,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354450683] [2021-06-05 07:01:36,466 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 07:01:36,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:36,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 07:01:36,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:01:36,467 INFO L87 Difference]: Start difference. First operand 226606 states and 655956 transitions. Second operand has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:38,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:38,898 INFO L93 Difference]: Finished difference Result 306514 states and 884419 transitions. [2021-06-05 07:01:38,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 07:01:38,898 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-06-05 07:01:38,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:39,805 INFO L225 Difference]: With dead ends: 306514 [2021-06-05 07:01:39,805 INFO L226 Difference]: Without dead ends: 306402 [2021-06-05 07:01:39,805 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 438.9ms TimeCoverageRelationStatistics Valid=136, Invalid=1124, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 07:01:40,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306402 states. [2021-06-05 07:01:44,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306402 to 223282. [2021-06-05 07:01:44,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223282 states, 223281 states have (on average 2.892543476605712) internal successors, (645850), 223281 states have internal predecessors, (645850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:45,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223282 states to 223282 states and 645850 transitions. [2021-06-05 07:01:45,477 INFO L78 Accepts]: Start accepts. Automaton has 223282 states and 645850 transitions. Word has length 46 [2021-06-05 07:01:45,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:45,477 INFO L482 AbstractCegarLoop]: Abstraction has 223282 states and 645850 transitions. [2021-06-05 07:01:45,477 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:45,477 INFO L276 IsEmpty]: Start isEmpty. Operand 223282 states and 645850 transitions. [2021-06-05 07:01:45,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-05 07:01:45,849 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:45,849 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 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 07:01:46,049 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable299,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:46,050 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:46,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:46,050 INFO L82 PathProgramCache]: Analyzing trace with hash -752360386, now seen corresponding path program 201 times [2021-06-05 07:01:46,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:46,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707275232] [2021-06-05 07:01:46,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:46,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:46,198 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:46,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:46,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707275232] [2021-06-05 07:01:46,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707275232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:46,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437068699] [2021-06-05 07:01:46,198 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 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:46,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 07:01:46,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:01:46,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:01:46,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:01:47,200 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:47,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437068699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:47,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:47,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 23 [2021-06-05 07:01:47,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600349870] [2021-06-05 07:01:47,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 07:01:47,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:47,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 07:01:47,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-06-05 07:01:47,202 INFO L87 Difference]: Start difference. First operand 223282 states and 645850 transitions. Second operand has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:49,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:49,369 INFO L93 Difference]: Finished difference Result 306804 states and 884969 transitions. [2021-06-05 07:01:49,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 07:01:49,385 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-06-05 07:01:49,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:50,046 INFO L225 Difference]: With dead ends: 306804 [2021-06-05 07:01:50,046 INFO L226 Difference]: Without dead ends: 306680 [2021-06-05 07:01:50,047 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 1208.0ms TimeCoverageRelationStatistics Valid=126, Invalid=1064, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 07:01:50,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306680 states. [2021-06-05 07:01:54,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306680 to 225174. [2021-06-05 07:01:54,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225174 states, 225173 states have (on average 2.8930644437832242) internal successors, (651440), 225173 states have internal predecessors, (651440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:55,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225174 states to 225174 states and 651440 transitions. [2021-06-05 07:01:55,569 INFO L78 Accepts]: Start accepts. Automaton has 225174 states and 651440 transitions. Word has length 46 [2021-06-05 07:01:55,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:55,569 INFO L482 AbstractCegarLoop]: Abstraction has 225174 states and 651440 transitions. [2021-06-05 07:01:55,569 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:55,569 INFO L276 IsEmpty]: Start isEmpty. Operand 225174 states and 651440 transitions. [2021-06-05 07:01:55,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-05 07:01:55,957 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:55,957 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 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 07:01:56,158 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2021-06-05 07:01:56,158 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:56,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:56,158 INFO L82 PathProgramCache]: Analyzing trace with hash 426214436, now seen corresponding path program 202 times [2021-06-05 07:01:56,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:56,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278335789] [2021-06-05 07:01:56,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:56,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:56,313 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:56,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:56,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278335789] [2021-06-05 07:01:56,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278335789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:56,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59528949] [2021-06-05 07:01:56,313 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 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:56,340 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:01:56,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:01:56,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 07:01:56,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:01:56,539 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:56,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59528949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:56,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:56,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-05 07:01:56,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845177178] [2021-06-05 07:01:56,539 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 07:01:56,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:56,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 07:01:56,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:01:56,540 INFO L87 Difference]: Start difference. First operand 225174 states and 651440 transitions. Second operand has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:58,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:58,560 INFO L93 Difference]: Finished difference Result 307154 states and 885951 transitions. [2021-06-05 07:01:58,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 07:01:58,560 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-06-05 07:01:58,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:59,253 INFO L225 Difference]: With dead ends: 307154 [2021-06-05 07:01:59,253 INFO L226 Difference]: Without dead ends: 307024 [2021-06-05 07:01:59,253 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 324.2ms TimeCoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2021-06-05 07:01:59,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307024 states. [2021-06-05 07:02:03,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307024 to 226798. [2021-06-05 07:02:04,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226798 states, 226797 states have (on average 2.893636159208455) internal successors, (656268), 226797 states have internal predecessors, (656268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:05,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226798 states to 226798 states and 656268 transitions. [2021-06-05 07:02:05,605 INFO L78 Accepts]: Start accepts. Automaton has 226798 states and 656268 transitions. Word has length 46 [2021-06-05 07:02:05,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:05,605 INFO L482 AbstractCegarLoop]: Abstraction has 226798 states and 656268 transitions. [2021-06-05 07:02:05,605 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:05,606 INFO L276 IsEmpty]: Start isEmpty. Operand 226798 states and 656268 transitions. [2021-06-05 07:02:06,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-05 07:02:06,135 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:06,135 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 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 07:02:06,358 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable303 [2021-06-05 07:02:06,358 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:06,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:06,358 INFO L82 PathProgramCache]: Analyzing trace with hash -8908162, now seen corresponding path program 203 times [2021-06-05 07:02:06,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:06,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007034733] [2021-06-05 07:02:06,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:06,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:06,556 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:06,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:06,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007034733] [2021-06-05 07:02:06,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007034733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:06,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264497447] [2021-06-05 07:02:06,556 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 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:06,590 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 07:02:06,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:02:06,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 07:02:06,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:06,834 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:06,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264497447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:06,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:06,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-05 07:02:06,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042213407] [2021-06-05 07:02:06,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 07:02:06,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:06,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 07:02:06,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:02:06,836 INFO L87 Difference]: Start difference. First operand 226798 states and 656268 transitions. Second operand has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:09,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:09,400 INFO L93 Difference]: Finished difference Result 307138 states and 885982 transitions. [2021-06-05 07:02:09,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 07:02:09,401 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-06-05 07:02:09,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:10,203 INFO L225 Difference]: With dead ends: 307138 [2021-06-05 07:02:10,203 INFO L226 Difference]: Without dead ends: 307062 [2021-06-05 07:02:10,203 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 363.6ms TimeCoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2021-06-05 07:02:10,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307062 states. [2021-06-05 07:02:14,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307062 to 227686. [2021-06-05 07:02:15,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227686 states, 227685 states have (on average 2.8936644926104047) internal successors, (658844), 227685 states have internal predecessors, (658844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:15,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227686 states to 227686 states and 658844 transitions. [2021-06-05 07:02:15,733 INFO L78 Accepts]: Start accepts. Automaton has 227686 states and 658844 transitions. Word has length 46 [2021-06-05 07:02:15,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:15,733 INFO L482 AbstractCegarLoop]: Abstraction has 227686 states and 658844 transitions. [2021-06-05 07:02:15,734 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:15,734 INFO L276 IsEmpty]: Start isEmpty. Operand 227686 states and 658844 transitions. [2021-06-05 07:02:16,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-05 07:02:16,119 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:16,119 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 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 07:02:16,319 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable305 [2021-06-05 07:02:16,320 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:16,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:16,320 INFO L82 PathProgramCache]: Analyzing trace with hash -534925852, now seen corresponding path program 204 times [2021-06-05 07:02:16,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:16,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915529606] [2021-06-05 07:02:16,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:16,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:16,499 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:16,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:16,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915529606] [2021-06-05 07:02:16,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915529606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:16,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334694502] [2021-06-05 07:02:16,499 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 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:16,528 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 07:02:16,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:02:16,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:02:16,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:17,341 WARN L205 SmtUtils]: Spent 725.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 13 [2021-06-05 07:02:17,551 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:17,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334694502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:17,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:17,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 23 [2021-06-05 07:02:17,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504712107] [2021-06-05 07:02:17,551 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 07:02:17,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:17,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 07:02:17,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=497, Unknown=0, NotChecked=0, Total=552 [2021-06-05 07:02:17,552 INFO L87 Difference]: Start difference. First operand 227686 states and 658844 transitions. Second operand has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:19,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:19,496 INFO L93 Difference]: Finished difference Result 307114 states and 885933 transitions. [2021-06-05 07:02:19,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 07:02:19,501 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-06-05 07:02:19,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:20,157 INFO L225 Difference]: With dead ends: 307114 [2021-06-05 07:02:20,157 INFO L226 Difference]: Without dead ends: 307076 [2021-06-05 07:02:20,158 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 543.9ms TimeCoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2021-06-05 07:02:20,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307076 states. [2021-06-05 07:02:24,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307076 to 227708. [2021-06-05 07:02:24,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227708 states, 227707 states have (on average 2.8936703746481225) internal successors, (658909), 227707 states have internal predecessors, (658909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:25,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227708 states to 227708 states and 658909 transitions. [2021-06-05 07:02:25,724 INFO L78 Accepts]: Start accepts. Automaton has 227708 states and 658909 transitions. Word has length 46 [2021-06-05 07:02:25,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:25,724 INFO L482 AbstractCegarLoop]: Abstraction has 227708 states and 658909 transitions. [2021-06-05 07:02:25,724 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:25,725 INFO L276 IsEmpty]: Start isEmpty. Operand 227708 states and 658909 transitions. [2021-06-05 07:02:26,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-05 07:02:26,128 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:26,128 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 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 07:02:26,329 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable307 [2021-06-05 07:02:26,329 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:26,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:26,329 INFO L82 PathProgramCache]: Analyzing trace with hash 250764184, now seen corresponding path program 205 times [2021-06-05 07:02:26,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:26,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031490641] [2021-06-05 07:02:26,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:26,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:26,478 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:26,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:26,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031490641] [2021-06-05 07:02:26,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031490641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:26,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217593446] [2021-06-05 07:02:26,479 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 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:26,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:26,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 07:02:26,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:26,730 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:26,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217593446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:26,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:26,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-06-05 07:02:26,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242197430] [2021-06-05 07:02:26,730 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 07:02:26,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:26,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 07:02:26,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-06-05 07:02:26,730 INFO L87 Difference]: Start difference. First operand 227708 states and 658909 transitions. Second operand has 24 states, 24 states have (on average 2.875) internal successors, (69), 23 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:28,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:28,887 INFO L93 Difference]: Finished difference Result 276784 states and 800858 transitions. [2021-06-05 07:02:28,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 07:02:28,887 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.875) internal successors, (69), 23 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-06-05 07:02:28,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:29,531 INFO L225 Difference]: With dead ends: 276784 [2021-06-05 07:02:29,531 INFO L226 Difference]: Without dead ends: 276678 [2021-06-05 07:02:29,531 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 420.1ms TimeCoverageRelationStatistics Valid=127, Invalid=1063, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 07:02:29,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276678 states. [2021-06-05 07:02:34,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276678 to 258936. [2021-06-05 07:02:34,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258936 states, 258935 states have (on average 2.9008554270376736) internal successors, (751133), 258935 states have internal predecessors, (751133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:35,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258936 states to 258936 states and 751133 transitions. [2021-06-05 07:02:35,136 INFO L78 Accepts]: Start accepts. Automaton has 258936 states and 751133 transitions. Word has length 46 [2021-06-05 07:02:35,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:35,136 INFO L482 AbstractCegarLoop]: Abstraction has 258936 states and 751133 transitions. [2021-06-05 07:02:35,136 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.875) internal successors, (69), 23 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:35,136 INFO L276 IsEmpty]: Start isEmpty. Operand 258936 states and 751133 transitions. [2021-06-05 07:02:36,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-05 07:02:36,416 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:36,416 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 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 07:02:36,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable309 [2021-06-05 07:02:36,617 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:36,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:36,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1527268248, now seen corresponding path program 206 times [2021-06-05 07:02:36,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:36,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420092010] [2021-06-05 07:02:36,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:36,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:36,751 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:36,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:36,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420092010] [2021-06-05 07:02:36,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420092010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:36,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758477453] [2021-06-05 07:02:36,752 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 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:36,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:02:36,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:02:36,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 07:02:36,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:37,002 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:37,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758477453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:37,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:37,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 22 [2021-06-05 07:02:37,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377687810] [2021-06-05 07:02:37,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 07:02:37,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:37,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 07:02:37,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:02:37,003 INFO L87 Difference]: Start difference. First operand 258936 states and 751133 transitions. Second operand has 23 states, 23 states have (on average 3.0) internal successors, (69), 22 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:39,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:39,038 INFO L93 Difference]: Finished difference Result 279301 states and 807945 transitions. [2021-06-05 07:02:39,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 07:02:39,038 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0) internal successors, (69), 22 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-06-05 07:02:39,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:39,685 INFO L225 Difference]: With dead ends: 279301 [2021-06-05 07:02:39,685 INFO L226 Difference]: Without dead ends: 279177 [2021-06-05 07:02:39,686 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 403.9ms TimeCoverageRelationStatistics Valid=127, Invalid=995, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 07:02:39,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279177 states. [2021-06-05 07:02:44,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279177 to 255508. [2021-06-05 07:02:44,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255508 states, 255507 states have (on average 2.898515500553801) internal successors, (740591), 255507 states have internal predecessors, (740591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:45,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255508 states to 255508 states and 740591 transitions. [2021-06-05 07:02:45,390 INFO L78 Accepts]: Start accepts. Automaton has 255508 states and 740591 transitions. Word has length 46 [2021-06-05 07:02:45,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:45,390 INFO L482 AbstractCegarLoop]: Abstraction has 255508 states and 740591 transitions. [2021-06-05 07:02:45,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.0) internal successors, (69), 22 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:45,390 INFO L276 IsEmpty]: Start isEmpty. Operand 255508 states and 740591 transitions. [2021-06-05 07:02:45,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-05 07:02:45,762 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:45,762 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 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 07:02:45,962 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable311,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:45,962 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:45,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:45,963 INFO L82 PathProgramCache]: Analyzing trace with hash -1217093792, now seen corresponding path program 207 times [2021-06-05 07:02:45,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:45,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293340423] [2021-06-05 07:02:45,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:45,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:46,111 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:46,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:46,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293340423] [2021-06-05 07:02:46,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293340423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:46,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194851376] [2021-06-05 07:02:46,111 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 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:46,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 07:02:46,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:02:46,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:02:46,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:47,151 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:47,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194851376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:47,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:47,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 23 [2021-06-05 07:02:47,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474107887] [2021-06-05 07:02:47,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 07:02:47,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:47,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 07:02:47,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-06-05 07:02:47,152 INFO L87 Difference]: Start difference. First operand 255508 states and 740591 transitions. Second operand has 24 states, 24 states have (on average 2.875) internal successors, (69), 23 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:48,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:48,676 INFO L93 Difference]: Finished difference Result 274555 states and 793544 transitions. [2021-06-05 07:02:48,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 07:02:48,677 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.875) internal successors, (69), 23 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-06-05 07:02:48,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:50,197 INFO L225 Difference]: With dead ends: 274555 [2021-06-05 07:02:50,197 INFO L226 Difference]: Without dead ends: 274424 [2021-06-05 07:02:50,197 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 1227.2ms TimeCoverageRelationStatistics Valid=127, Invalid=1063, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 07:02:50,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274424 states. [2021-06-05 07:02:54,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274424 to 253574. [2021-06-05 07:02:54,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253574 states, 253573 states have (on average 2.8976665496720866) internal successors, (734770), 253573 states have internal predecessors, (734770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:56,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253574 states to 253574 states and 734770 transitions. [2021-06-05 07:02:56,431 INFO L78 Accepts]: Start accepts. Automaton has 253574 states and 734770 transitions. Word has length 46 [2021-06-05 07:02:56,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:56,431 INFO L482 AbstractCegarLoop]: Abstraction has 253574 states and 734770 transitions. [2021-06-05 07:02:56,431 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.875) internal successors, (69), 23 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:56,431 INFO L276 IsEmpty]: Start isEmpty. Operand 253574 states and 734770 transitions. [2021-06-05 07:02:56,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-05 07:02:56,814 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:56,814 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 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 07:02:57,014 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable313 [2021-06-05 07:02:57,014 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:57,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:57,015 INFO L82 PathProgramCache]: Analyzing trace with hash -1861204456, now seen corresponding path program 208 times [2021-06-05 07:02:57,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:57,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697626867] [2021-06-05 07:02:57,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:57,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:57,158 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:57,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:57,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697626867] [2021-06-05 07:02:57,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697626867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:57,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719828792] [2021-06-05 07:02:57,158 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 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:57,185 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:02:57,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:02:57,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 07:02:57,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:57,404 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:57,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719828792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:57,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:57,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 22 [2021-06-05 07:02:57,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297068748] [2021-06-05 07:02:57,404 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 07:02:57,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:57,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 07:02:57,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:02:57,404 INFO L87 Difference]: Start difference. First operand 253574 states and 734770 transitions. Second operand has 23 states, 23 states have (on average 3.0) internal successors, (69), 22 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:59,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:59,263 INFO L93 Difference]: Finished difference Result 271446 states and 784470 transitions. [2021-06-05 07:02:59,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 07:02:59,263 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0) internal successors, (69), 22 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-06-05 07:02:59,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:59,842 INFO L225 Difference]: With dead ends: 271446 [2021-06-05 07:02:59,842 INFO L226 Difference]: Without dead ends: 271292 [2021-06-05 07:02:59,842 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 324.9ms TimeCoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2021-06-05 07:03:00,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271292 states. [2021-06-05 07:03:04,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271292 to 252854. [2021-06-05 07:03:04,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252854 states, 252853 states have (on average 2.897572898087031) internal successors, (732660), 252853 states have internal predecessors, (732660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:05,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252854 states to 252854 states and 732660 transitions. [2021-06-05 07:03:05,391 INFO L78 Accepts]: Start accepts. Automaton has 252854 states and 732660 transitions. Word has length 46 [2021-06-05 07:03:05,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:05,391 INFO L482 AbstractCegarLoop]: Abstraction has 252854 states and 732660 transitions. [2021-06-05 07:03:05,391 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.0) internal successors, (69), 22 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:05,391 INFO L276 IsEmpty]: Start isEmpty. Operand 252854 states and 732660 transitions. [2021-06-05 07:03:06,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-05 07:03:06,557 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:06,558 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 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 07:03:06,758 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable315,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:06,758 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:06,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:06,758 INFO L82 PathProgramCache]: Analyzing trace with hash -648117152, now seen corresponding path program 209 times [2021-06-05 07:03:06,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:06,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178459792] [2021-06-05 07:03:06,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:06,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:06,920 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:06,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:06,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178459792] [2021-06-05 07:03:06,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178459792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:06,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007958633] [2021-06-05 07:03:06,921 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 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:06,948 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 07:03:06,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:03:06,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:03:06,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:03:07,190 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:07,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007958633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:07,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:03:07,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 23 [2021-06-05 07:03:07,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234411398] [2021-06-05 07:03:07,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 07:03:07,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:07,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 07:03:07,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2021-06-05 07:03:07,191 INFO L87 Difference]: Start difference. First operand 252854 states and 732660 transitions. Second operand has 24 states, 24 states have (on average 2.875) internal successors, (69), 23 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:09,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:09,152 INFO L93 Difference]: Finished difference Result 270419 states and 781520 transitions. [2021-06-05 07:03:09,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 07:03:09,152 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.875) internal successors, (69), 23 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-06-05 07:03:09,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:09,778 INFO L225 Difference]: With dead ends: 270419 [2021-06-05 07:03:09,779 INFO L226 Difference]: Without dead ends: 270343 [2021-06-05 07:03:09,779 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 469.7ms TimeCoverageRelationStatistics Valid=104, Invalid=888, Unknown=0, NotChecked=0, Total=992 [2021-06-05 07:03:10,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270343 states. [2021-06-05 07:03:14,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270343 to 252092. [2021-06-05 07:03:14,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252092 states, 252091 states have (on average 2.8975131995985577) internal successors, (730437), 252091 states have internal predecessors, (730437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:15,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252092 states to 252092 states and 730437 transitions. [2021-06-05 07:03:15,336 INFO L78 Accepts]: Start accepts. Automaton has 252092 states and 730437 transitions. Word has length 46 [2021-06-05 07:03:15,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:15,336 INFO L482 AbstractCegarLoop]: Abstraction has 252092 states and 730437 transitions. [2021-06-05 07:03:15,337 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.875) internal successors, (69), 23 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:15,337 INFO L276 IsEmpty]: Start isEmpty. Operand 252092 states and 730437 transitions. [2021-06-05 07:03:15,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-05 07:03:15,733 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:15,733 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 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 07:03:15,933 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable317,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:15,934 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:15,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:15,934 INFO L82 PathProgramCache]: Analyzing trace with hash 580927768, now seen corresponding path program 210 times [2021-06-05 07:03:15,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:15,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791217138] [2021-06-05 07:03:15,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:15,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:16,105 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:16,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:16,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791217138] [2021-06-05 07:03:16,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791217138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:16,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995800747] [2021-06-05 07:03:16,106 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 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:16,133 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 07:03:16,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:03:16,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:03:16,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:03:17,103 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:17,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995800747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:17,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:03:17,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 24 [2021-06-05 07:03:17,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362730158] [2021-06-05 07:03:17,104 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 07:03:17,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:17,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 07:03:17,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-06-05 07:03:17,104 INFO L87 Difference]: Start difference. First operand 252092 states and 730437 transitions. Second operand has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:18,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:18,521 INFO L93 Difference]: Finished difference Result 270325 states and 781258 transitions. [2021-06-05 07:03:18,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 07:03:18,522 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-06-05 07:03:18,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:19,580 INFO L225 Difference]: With dead ends: 270325 [2021-06-05 07:03:19,580 INFO L226 Difference]: Without dead ends: 270249 [2021-06-05 07:03:19,580 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 1220.0ms TimeCoverageRelationStatistics Valid=103, Invalid=953, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:03:19,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270249 states. [2021-06-05 07:03:23,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270249 to 252843. [2021-06-05 07:03:23,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252843 states, 252842 states have (on average 2.8974379256610847) internal successors, (732594), 252842 states have internal predecessors, (732594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:24,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252843 states to 252843 states and 732594 transitions. [2021-06-05 07:03:24,994 INFO L78 Accepts]: Start accepts. Automaton has 252843 states and 732594 transitions. Word has length 46 [2021-06-05 07:03:24,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:24,994 INFO L482 AbstractCegarLoop]: Abstraction has 252843 states and 732594 transitions. [2021-06-05 07:03:24,995 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:24,995 INFO L276 IsEmpty]: Start isEmpty. Operand 252843 states and 732594 transitions. [2021-06-05 07:03:25,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-05 07:03:25,422 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:25,422 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 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 07:03:25,622 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable319,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:25,623 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:25,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:25,623 INFO L82 PathProgramCache]: Analyzing trace with hash 372500588, now seen corresponding path program 211 times [2021-06-05 07:03:25,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:25,623 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62244368] [2021-06-05 07:03:25,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:25,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:25,777 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:25,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:25,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62244368] [2021-06-05 07:03:25,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62244368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:25,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434976832] [2021-06-05 07:03:25,778 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 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:25,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:25,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 07:03:25,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:03:26,046 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:26,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434976832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:26,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:03:26,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-06-05 07:03:26,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442317793] [2021-06-05 07:03:26,046 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 07:03:26,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:26,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 07:03:26,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-06-05 07:03:26,047 INFO L87 Difference]: Start difference. First operand 252843 states and 732594 transitions. Second operand has 25 states, 25 states have (on average 2.88) internal successors, (72), 24 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:28,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:28,071 INFO L93 Difference]: Finished difference Result 284097 states and 824904 transitions. [2021-06-05 07:03:28,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 07:03:28,071 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.88) internal successors, (72), 24 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-06-05 07:03:28,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:28,669 INFO L225 Difference]: With dead ends: 284097 [2021-06-05 07:03:28,669 INFO L226 Difference]: Without dead ends: 283975 [2021-06-05 07:03:28,669 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 414.8ms TimeCoverageRelationStatistics Valid=119, Invalid=1003, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 07:03:29,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283975 states. [2021-06-05 07:03:34,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283975 to 283015. [2021-06-05 07:03:34,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283015 states, 283014 states have (on average 2.9055665090772895) internal successors, (822316), 283014 states have internal predecessors, (822316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:35,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283015 states to 283015 states and 822316 transitions. [2021-06-05 07:03:35,273 INFO L78 Accepts]: Start accepts. Automaton has 283015 states and 822316 transitions. Word has length 46 [2021-06-05 07:03:35,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:35,273 INFO L482 AbstractCegarLoop]: Abstraction has 283015 states and 822316 transitions. [2021-06-05 07:03:35,273 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.88) internal successors, (72), 24 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:35,273 INFO L276 IsEmpty]: Start isEmpty. Operand 283015 states and 822316 transitions. [2021-06-05 07:03:35,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-05 07:03:35,763 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:35,763 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 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 07:03:35,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable321 [2021-06-05 07:03:35,964 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:35,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:35,964 INFO L82 PathProgramCache]: Analyzing trace with hash -850429848, now seen corresponding path program 212 times [2021-06-05 07:03:35,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:35,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872816707] [2021-06-05 07:03:35,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:35,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:36,958 WARN L205 SmtUtils]: Spent 882.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 10 [2021-06-05 07:03:36,989 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:36,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:36,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872816707] [2021-06-05 07:03:36,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872816707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:36,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181431280] [2021-06-05 07:03:36,990 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 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:37,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:03:37,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:03:37,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 07:03:37,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:03:37,329 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:37,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181431280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:37,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:03:37,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 22 [2021-06-05 07:03:37,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035165657] [2021-06-05 07:03:37,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 07:03:37,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:37,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 07:03:37,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:03:37,330 INFO L87 Difference]: Start difference. First operand 283015 states and 822316 transitions. Second operand has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 22 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:39,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:39,177 INFO L93 Difference]: Finished difference Result 286594 states and 831909 transitions. [2021-06-05 07:03:39,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 07:03:39,178 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 22 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-06-05 07:03:39,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:39,957 INFO L225 Difference]: With dead ends: 286594 [2021-06-05 07:03:39,957 INFO L226 Difference]: Without dead ends: 286464 [2021-06-05 07:03:39,957 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 1275.1ms TimeCoverageRelationStatistics Valid=118, Invalid=874, Unknown=0, NotChecked=0, Total=992 [2021-06-05 07:03:40,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286464 states. [2021-06-05 07:03:44,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286464 to 280445. [2021-06-05 07:03:44,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280445 states, 280444 states have (on average 2.9030644264095504) internal successors, (814147), 280444 states have internal predecessors, (814147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:46,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280445 states to 280445 states and 814147 transitions. [2021-06-05 07:03:46,564 INFO L78 Accepts]: Start accepts. Automaton has 280445 states and 814147 transitions. Word has length 46 [2021-06-05 07:03:46,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:46,564 INFO L482 AbstractCegarLoop]: Abstraction has 280445 states and 814147 transitions. [2021-06-05 07:03:46,564 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 22 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:46,565 INFO L276 IsEmpty]: Start isEmpty. Operand 280445 states and 814147 transitions. [2021-06-05 07:03:47,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-05 07:03:47,002 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:47,002 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 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 07:03:47,205 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable323 [2021-06-05 07:03:47,205 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:47,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:47,205 INFO L82 PathProgramCache]: Analyzing trace with hash -454634690, now seen corresponding path program 213 times [2021-06-05 07:03:47,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:47,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828678897] [2021-06-05 07:03:47,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:47,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:47,325 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:47,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:47,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828678897] [2021-06-05 07:03:47,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828678897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:47,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578205981] [2021-06-05 07:03:47,326 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 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:47,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 07:03:47,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:03:47,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:03:47,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:03:47,608 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:47,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578205981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:47,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:03:47,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 23 [2021-06-05 07:03:47,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904131047] [2021-06-05 07:03:47,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 07:03:47,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:47,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 07:03:47,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2021-06-05 07:03:47,609 INFO L87 Difference]: Start difference. First operand 280445 states and 814147 transitions. Second operand has 24 states, 24 states have (on average 3.0) internal successors, (72), 23 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:49,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:49,727 INFO L93 Difference]: Finished difference Result 282908 states and 820344 transitions. [2021-06-05 07:03:49,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 07:03:49,727 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.0) internal successors, (72), 23 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-06-05 07:03:49,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:50,309 INFO L225 Difference]: With dead ends: 282908 [2021-06-05 07:03:50,309 INFO L226 Difference]: Without dead ends: 282777 [2021-06-05 07:03:50,310 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 436.5ms TimeCoverageRelationStatistics Valid=123, Invalid=999, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 07:03:51,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282777 states. [2021-06-05 07:03:54,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282777 to 277559. [2021-06-05 07:03:55,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277559 states, 277558 states have (on average 2.903148170832763) internal successors, (805792), 277558 states have internal predecessors, (805792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:56,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277559 states to 277559 states and 805792 transitions. [2021-06-05 07:03:56,755 INFO L78 Accepts]: Start accepts. Automaton has 277559 states and 805792 transitions. Word has length 46 [2021-06-05 07:03:56,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:56,755 INFO L482 AbstractCegarLoop]: Abstraction has 277559 states and 805792 transitions. [2021-06-05 07:03:56,755 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 3.0) internal successors, (72), 23 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:56,755 INFO L276 IsEmpty]: Start isEmpty. Operand 277559 states and 805792 transitions. [2021-06-05 07:03:57,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-05 07:03:57,187 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:57,187 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 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 07:03:57,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable325,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:57,388 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:57,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:57,388 INFO L82 PathProgramCache]: Analyzing trace with hash 1743048966, now seen corresponding path program 214 times [2021-06-05 07:03:57,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:57,388 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712712664] [2021-06-05 07:03:57,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:57,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:57,556 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:57,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:57,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712712664] [2021-06-05 07:03:57,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712712664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:57,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759654245] [2021-06-05 07:03:57,556 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 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:57,583 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:03:57,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:03:57,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 07:03:57,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:03:57,815 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:57,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759654245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:57,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:03:57,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 22 [2021-06-05 07:03:57,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11874011] [2021-06-05 07:03:57,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 07:03:57,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:57,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 07:03:57,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:03:57,815 INFO L87 Difference]: Start difference. First operand 277559 states and 805792 transitions. Second operand has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 22 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:58,651 WARN L205 SmtUtils]: Spent 723.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2021-06-05 07:03:59,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:59,788 INFO L93 Difference]: Finished difference Result 278792 states and 808737 transitions. [2021-06-05 07:03:59,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 07:03:59,788 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 22 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-06-05 07:03:59,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:00,844 INFO L225 Difference]: With dead ends: 278792 [2021-06-05 07:04:00,844 INFO L226 Difference]: Without dead ends: 278662 [2021-06-05 07:04:00,845 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 1051.5ms TimeCoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2021-06-05 07:04:01,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278662 states. [2021-06-05 07:04:05,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278662 to 275335. [2021-06-05 07:04:05,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275335 states, 275334 states have (on average 2.9027944242265757) internal successors, (799238), 275334 states have internal predecessors, (799238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:06,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275335 states to 275335 states and 799238 transitions. [2021-06-05 07:04:06,484 INFO L78 Accepts]: Start accepts. Automaton has 275335 states and 799238 transitions. Word has length 46 [2021-06-05 07:04:06,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:06,484 INFO L482 AbstractCegarLoop]: Abstraction has 275335 states and 799238 transitions. [2021-06-05 07:04:06,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 22 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:06,484 INFO L276 IsEmpty]: Start isEmpty. Operand 275335 states and 799238 transitions. [2021-06-05 07:04:06,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-05 07:04:06,924 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:06,924 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 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 07:04:07,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable327 [2021-06-05 07:04:07,124 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:07,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:07,125 INFO L82 PathProgramCache]: Analyzing trace with hash 455384638, now seen corresponding path program 215 times [2021-06-05 07:04:07,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:07,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028997585] [2021-06-05 07:04:07,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:07,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:07,276 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:07,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:07,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028997585] [2021-06-05 07:04:07,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028997585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:07,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751571715] [2021-06-05 07:04:07,276 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 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:07,304 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 07:04:07,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:07,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:04:07,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:08,350 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:08,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751571715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:08,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:08,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 24 [2021-06-05 07:04:08,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250698872] [2021-06-05 07:04:08,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 07:04:08,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:08,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 07:04:08,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2021-06-05 07:04:08,351 INFO L87 Difference]: Start difference. First operand 275335 states and 799238 transitions. Second operand has 25 states, 25 states have (on average 2.88) internal successors, (72), 24 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:09,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:09,799 INFO L93 Difference]: Finished difference Result 278625 states and 808471 transitions. [2021-06-05 07:04:09,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 07:04:09,800 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.88) internal successors, (72), 24 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-06-05 07:04:09,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:10,812 INFO L225 Difference]: With dead ends: 278625 [2021-06-05 07:04:10,813 INFO L226 Difference]: Without dead ends: 278549 [2021-06-05 07:04:10,813 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 1261.3ms TimeCoverageRelationStatistics Valid=108, Invalid=948, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:04:11,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278549 states. Received shutdown request... [2021-06-05 07:04:12,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable329,220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:12,096 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 07:04:12,097 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 07:04:12,099 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 07:04:12,099 INFO L202 PluginConnector]: Adding new model multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 07:04:12 BasicIcfg [2021-06-05 07:04:12,099 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 07:04:12,100 INFO L168 Benchmark]: Toolchain (without parser) took 687056.79 ms. Allocated memory was 356.5 MB in the beginning and 16.0 GB in the end (delta: 15.6 GB). Free memory was 336.8 MB in the beginning and 10.3 GB in the end (delta: -9.9 GB). Peak memory consumption was 6.4 GB. Max. memory is 16.0 GB. [2021-06-05 07:04:12,100 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.17 ms. Allocated memory is still 356.5 MB. Free memory was 337.9 MB in the beginning and 337.9 MB in the end (delta: 71.4 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 07:04:12,100 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.08 ms. Allocated memory is still 356.5 MB. Free memory was 336.7 MB in the beginning and 335.3 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 07:04:12,100 INFO L168 Benchmark]: Boogie Preprocessor took 14.33 ms. Allocated memory is still 356.5 MB. Free memory was 335.3 MB in the beginning and 334.3 MB in the end (delta: 985.7 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 07:04:12,100 INFO L168 Benchmark]: RCFGBuilder took 248.61 ms. Allocated memory is still 356.5 MB. Free memory was 334.2 MB in the beginning and 321.5 MB in the end (delta: 12.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. [2021-06-05 07:04:12,100 INFO L168 Benchmark]: TraceAbstraction took 686764.47 ms. Allocated memory was 356.5 MB in the beginning and 16.0 GB in the end (delta: 15.6 GB). Free memory was 321.1 MB in the beginning and 10.3 GB in the end (delta: -10.0 GB). Peak memory consumption was 6.4 GB. Max. memory is 16.0 GB. [2021-06-05 07:04:12,100 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 0.17 ms. Allocated memory is still 356.5 MB. Free memory was 337.9 MB in the beginning and 337.9 MB in the end (delta: 71.4 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 24.08 ms. Allocated memory is still 356.5 MB. Free memory was 336.7 MB in the beginning and 335.3 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 14.33 ms. Allocated memory is still 356.5 MB. Free memory was 335.3 MB in the beginning and 334.3 MB in the end (delta: 985.7 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 248.61 ms. Allocated memory is still 356.5 MB. Free memory was 334.2 MB in the beginning and 321.5 MB in the end (delta: 12.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. * TraceAbstraction took 686764.47 ms. Allocated memory was 356.5 MB in the beginning and 16.0 GB in the end (delta: 15.6 GB). Free memory was 321.1 MB in the beginning and 10.3 GB in the end (delta: -10.0 GB). Peak memory consumption was 6.4 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - 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 executing MinimizeSevpa. - TimeoutResultAtElement [Line: 61]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing MinimizeSevpa. - TimeoutResultAtElement [Line: 61]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing MinimizeSevpa. - TimeoutResultAtElement [Line: 68]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while executing MinimizeSevpa. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 55 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 686687.4ms, OverallIterations: 233, TraceHistogramMax: 4, EmptinessCheckTime: 28889.1ms, AutomataDifference: 208962.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 79.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 21064 SDtfs, 44040 SDslu, 188189 SDs, 0 SdLazy, 84945 SolverSat, 4720 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 35571.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 15603 GetRequests, 8919 SyntacticMatches, 158 SemanticMatches, 6526 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61560 ImplicationChecksByTransitivity, 76356.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=283015occurred in iteration=229, InterpolantAutomatonStates: 6099, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 335535.9ms AutomataMinimizationTime, 233 MinimizatonAttempts, 2505205 StatesRemovedByMinimization, 232 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 888.6ms SsaConstructionTime, 2413.3ms SatisfiabilityAnalysisTime, 59924.6ms InterpolantComputationTime, 16952 NumberOfCodeBlocks, 16949 NumberOfCodeBlocksAsserted, 856 NumberOfCheckSat, 16500 ConstructedInterpolants, 0 QuantifiedInterpolants, 120831 SizeOfPredicates, 905 NumberOfNonLiveVariables, 17641 ConjunctsInSsa, 3704 ConjunctsInUnsatCore, 452 InterpolantComputations, 14 PerfectInterpolantSequences, 2163/9326 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