/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-crafted/bor3.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 18:35:32,267 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 18:35:32,270 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 18:35:32,282 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 18:35:32,282 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 18:35:32,283 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 18:35:32,284 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 18:35:32,286 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 18:35:32,288 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 18:35:32,289 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 18:35:32,290 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 18:35:32,291 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 18:35:32,291 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 18:35:32,292 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 18:35:32,293 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 18:35:32,294 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 18:35:32,295 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 18:35:32,296 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 18:35:32,298 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 18:35:32,300 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 18:35:32,303 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 18:35:32,304 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 18:35:32,305 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 18:35:32,306 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 18:35:32,308 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 18:35:32,327 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 18:35:32,330 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 18:35:32,331 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 18:35:32,333 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-06 18:35:32,348 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 18:35:32,348 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 18:35:32,349 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 18:35:32,350 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 18:35:32,350 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 18:35:32,350 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 18:35:32,350 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 18:35:32,351 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 18:35:32,351 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 18:35:32,351 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 18:35:32,351 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 18:35:32,351 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 18:35:32,352 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 18:35:32,352 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 18:35:32,352 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 18:35:32,352 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 18:35:32,352 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 18:35:32,353 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 18:35:32,353 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 18:35:32,353 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 18:35:32,353 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 18:35:32,354 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 18:35:32,354 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 18:35:32,354 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 18:35:32,354 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 18:35:32,354 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 18:35:32,355 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 18:35:32,355 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 18:35:32,355 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 18:35:32,687 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 18:35:32,707 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 18:35:32,711 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 18:35:32,713 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 18:35:32,713 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 18:35:32,714 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/bor3.i [2019-11-06 18:35:32,778 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ac43d961/0a09c3d971f14633b851b6526fc1ca30/FLAG4a119eb9c [2019-11-06 18:35:33,229 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 18:35:33,231 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/bor3.i [2019-11-06 18:35:33,237 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ac43d961/0a09c3d971f14633b851b6526fc1ca30/FLAG4a119eb9c [2019-11-06 18:35:33,641 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ac43d961/0a09c3d971f14633b851b6526fc1ca30 [2019-11-06 18:35:33,650 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 18:35:33,651 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 18:35:33,652 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 18:35:33,652 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 18:35:33,655 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 18:35:33,656 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:35:33" (1/1) ... [2019-11-06 18:35:33,658 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67b930ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:35:33, skipping insertion in model container [2019-11-06 18:35:33,659 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:35:33" (1/1) ... [2019-11-06 18:35:33,665 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 18:35:33,680 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 18:35:33,871 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:35:33,883 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 18:35:33,913 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:35:34,015 INFO L192 MainTranslator]: Completed translation [2019-11-06 18:35:34,016 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:35:34 WrapperNode [2019-11-06 18:35:34,017 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 18:35:34,018 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 18:35:34,018 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 18:35:34,018 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 18:35:34,030 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:35:34" (1/1) ... [2019-11-06 18:35:34,030 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:35:34" (1/1) ... [2019-11-06 18:35:34,038 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:35:34" (1/1) ... [2019-11-06 18:35:34,038 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:35:34" (1/1) ... [2019-11-06 18:35:34,048 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:35:34" (1/1) ... [2019-11-06 18:35:34,056 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:35:34" (1/1) ... [2019-11-06 18:35:34,058 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:35:34" (1/1) ... [2019-11-06 18:35:34,060 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 18:35:34,061 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 18:35:34,061 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 18:35:34,061 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 18:35:34,062 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:35:34" (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 [2019-11-06 18:35:34,112 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 18:35:34,113 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 18:35:34,113 INFO L138 BoogieDeclarations]: Found implementation of procedure bor [2019-11-06 18:35:34,113 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 18:35:34,113 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 18:35:34,113 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 18:35:34,114 INFO L130 BoogieDeclarations]: Found specification of procedure bor [2019-11-06 18:35:34,114 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-06 18:35:34,114 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 18:35:34,114 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-06 18:35:34,114 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-06 18:35:34,115 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-06 18:35:34,115 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 18:35:34,115 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 18:35:34,375 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 18:35:34,375 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-11-06 18:35:34,376 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:35:34 BoogieIcfgContainer [2019-11-06 18:35:34,377 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 18:35:34,378 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 18:35:34,378 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 18:35:34,381 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 18:35:34,381 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 06:35:33" (1/3) ... [2019-11-06 18:35:34,382 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c6465ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:35:34, skipping insertion in model container [2019-11-06 18:35:34,382 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:35:34" (2/3) ... [2019-11-06 18:35:34,383 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c6465ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:35:34, skipping insertion in model container [2019-11-06 18:35:34,383 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:35:34" (3/3) ... [2019-11-06 18:35:34,384 INFO L109 eAbstractionObserver]: Analyzing ICFG bor3.i [2019-11-06 18:35:34,395 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 18:35:34,403 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 18:35:34,415 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 18:35:34,474 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 18:35:34,474 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 18:35:34,474 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 18:35:34,474 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 18:35:34,474 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 18:35:34,475 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 18:35:34,475 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 18:35:34,475 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 18:35:34,497 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2019-11-06 18:35:34,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-06 18:35:34,506 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:34,509 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:35:34,511 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:34,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:34,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1283808693, now seen corresponding path program 1 times [2019-11-06 18:35:34,526 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:34,527 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596373713] [2019-11-06 18:35:34,527 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:34,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:34,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:34,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:34,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:34,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:34,749 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-06 18:35:34,750 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596373713] [2019-11-06 18:35:34,751 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:35:34,752 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 18:35:34,756 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090282680] [2019-11-06 18:35:34,767 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 18:35:34,768 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:34,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 18:35:34,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:35:34,786 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 3 states. [2019-11-06 18:35:34,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:34,915 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2019-11-06 18:35:34,916 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 18:35:34,917 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2019-11-06 18:35:34,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:34,934 INFO L225 Difference]: With dead ends: 54 [2019-11-06 18:35:34,934 INFO L226 Difference]: Without dead ends: 26 [2019-11-06 18:35:34,940 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:35:34,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-06 18:35:34,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-11-06 18:35:34,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-06 18:35:34,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2019-11-06 18:35:34,979 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 32 [2019-11-06 18:35:34,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:34,980 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2019-11-06 18:35:34,980 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 18:35:34,981 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2019-11-06 18:35:34,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-06 18:35:34,983 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:34,983 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:35:34,984 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:34,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:34,984 INFO L82 PathProgramCache]: Analyzing trace with hash 721846027, now seen corresponding path program 1 times [2019-11-06 18:35:34,985 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:34,985 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432385812] [2019-11-06 18:35:34,986 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:35,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:35,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:35,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:35,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:35,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:35,122 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-06 18:35:35,122 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432385812] [2019-11-06 18:35:35,124 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708074367] [2019-11-06 18:35:35,124 INFO L94 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 [2019-11-06 18:35:35,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:35,195 INFO L256 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-06 18:35:35,202 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:35,238 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-06 18:35:35,238 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:35:35,238 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2019-11-06 18:35:35,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634792230] [2019-11-06 18:35:35,241 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 18:35:35,241 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:35,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 18:35:35,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:35:35,242 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 3 states. [2019-11-06 18:35:35,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:35,258 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2019-11-06 18:35:35,259 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 18:35:35,259 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2019-11-06 18:35:35,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:35,260 INFO L225 Difference]: With dead ends: 46 [2019-11-06 18:35:35,260 INFO L226 Difference]: Without dead ends: 28 [2019-11-06 18:35:35,261 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:35:35,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-06 18:35:35,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2019-11-06 18:35:35,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-06 18:35:35,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2019-11-06 18:35:35,269 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 32 [2019-11-06 18:35:35,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:35,269 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2019-11-06 18:35:35,269 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 18:35:35,269 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2019-11-06 18:35:35,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-06 18:35:35,271 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:35,271 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-06 18:35:35,475 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:35,476 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:35,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:35,476 INFO L82 PathProgramCache]: Analyzing trace with hash 1487444845, now seen corresponding path program 1 times [2019-11-06 18:35:35,477 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:35,477 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370506975] [2019-11-06 18:35:35,477 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:35,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:35,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:35,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:35,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:35,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:35,605 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-06 18:35:35,606 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370506975] [2019-11-06 18:35:35,606 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058672575] [2019-11-06 18:35:35,606 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:35,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:35,683 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-06 18:35:35,689 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:35,703 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-06 18:35:35,703 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:35:35,704 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2019-11-06 18:35:35,704 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32618932] [2019-11-06 18:35:35,705 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 18:35:35,716 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:35,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 18:35:35,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:35:35,717 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 3 states. [2019-11-06 18:35:35,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:35,733 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2019-11-06 18:35:35,734 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 18:35:35,734 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 34 [2019-11-06 18:35:35,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:35,735 INFO L225 Difference]: With dead ends: 46 [2019-11-06 18:35:35,735 INFO L226 Difference]: Without dead ends: 29 [2019-11-06 18:35:35,736 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:35:35,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-06 18:35:35,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-11-06 18:35:35,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-06 18:35:35,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2019-11-06 18:35:35,743 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 34 [2019-11-06 18:35:35,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:35,743 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2019-11-06 18:35:35,743 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 18:35:35,743 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2019-11-06 18:35:35,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-11-06 18:35:35,745 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:35,745 INFO L410 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] [2019-11-06 18:35:35,948 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:35,948 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:35,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:35,949 INFO L82 PathProgramCache]: Analyzing trace with hash 2063023467, now seen corresponding path program 1 times [2019-11-06 18:35:35,949 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:35,949 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522423161] [2019-11-06 18:35:35,949 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:36,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:36,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:36,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:36,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:36,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:36,111 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-06 18:35:36,112 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522423161] [2019-11-06 18:35:36,112 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198125674] [2019-11-06 18:35:36,112 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:36,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:36,180 INFO L256 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-06 18:35:36,186 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:36,204 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-11-06 18:35:36,205 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:35:36,205 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-11-06 18:35:36,205 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003581978] [2019-11-06 18:35:36,206 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 18:35:36,206 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:36,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 18:35:36,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:35:36,207 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 3 states. [2019-11-06 18:35:36,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:36,219 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2019-11-06 18:35:36,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 18:35:36,220 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 40 [2019-11-06 18:35:36,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:36,221 INFO L225 Difference]: With dead ends: 43 [2019-11-06 18:35:36,221 INFO L226 Difference]: Without dead ends: 30 [2019-11-06 18:35:36,222 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:35:36,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-06 18:35:36,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2019-11-06 18:35:36,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-06 18:35:36,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2019-11-06 18:35:36,228 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 40 [2019-11-06 18:35:36,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:36,230 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2019-11-06 18:35:36,231 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 18:35:36,231 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2019-11-06 18:35:36,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-11-06 18:35:36,232 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:36,232 INFO L410 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, 1, 1] [2019-11-06 18:35:36,433 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:36,441 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:36,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:36,442 INFO L82 PathProgramCache]: Analyzing trace with hash -1550668567, now seen corresponding path program 1 times [2019-11-06 18:35:36,442 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:36,442 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324227046] [2019-11-06 18:35:36,442 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:36,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:36,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:36,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:36,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:36,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:36,565 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-06 18:35:36,565 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324227046] [2019-11-06 18:35:36,565 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731453156] [2019-11-06 18:35:36,566 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-11-06 18:35:36,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:36,628 INFO L256 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 18:35:36,633 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:36,650 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-11-06 18:35:36,651 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:36,651 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 8 [2019-11-06 18:35:36,652 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600053928] [2019-11-06 18:35:36,652 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 18:35:36,652 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:36,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 18:35:36,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-06 18:35:36,653 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 8 states. [2019-11-06 18:35:36,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:36,780 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2019-11-06 18:35:36,780 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 18:35:36,781 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 42 [2019-11-06 18:35:36,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:36,782 INFO L225 Difference]: With dead ends: 55 [2019-11-06 18:35:36,782 INFO L226 Difference]: Without dead ends: 35 [2019-11-06 18:35:36,783 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2019-11-06 18:35:36,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-06 18:35:36,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2019-11-06 18:35:36,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-06 18:35:36,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2019-11-06 18:35:36,790 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 42 [2019-11-06 18:35:36,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:36,790 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2019-11-06 18:35:36,790 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 18:35:36,790 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2019-11-06 18:35:36,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-11-06 18:35:36,792 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:36,792 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:35:37,000 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:37,001 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:37,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:37,001 INFO L82 PathProgramCache]: Analyzing trace with hash 948091209, now seen corresponding path program 2 times [2019-11-06 18:35:37,001 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:37,002 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718507133] [2019-11-06 18:35:37,002 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:37,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:37,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:37,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:37,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:37,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:37,152 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-06 18:35:37,153 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718507133] [2019-11-06 18:35:37,154 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157383255] [2019-11-06 18:35:37,154 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2019-11-06 18:35:37,224 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:35:37,225 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:35:37,226 INFO L256 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 18:35:37,239 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:37,267 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-06 18:35:37,267 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:37,267 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-11-06 18:35:37,270 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623877943] [2019-11-06 18:35:37,273 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 18:35:37,273 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:37,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 18:35:37,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:35:37,274 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 7 states. [2019-11-06 18:35:37,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:37,365 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2019-11-06 18:35:37,365 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 18:35:37,365 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 50 [2019-11-06 18:35:37,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:37,366 INFO L225 Difference]: With dead ends: 58 [2019-11-06 18:35:37,366 INFO L226 Difference]: Without dead ends: 36 [2019-11-06 18:35:37,367 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:35:37,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-06 18:35:37,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2019-11-06 18:35:37,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-06 18:35:37,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2019-11-06 18:35:37,374 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 50 [2019-11-06 18:35:37,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:37,374 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2019-11-06 18:35:37,375 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 18:35:37,375 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2019-11-06 18:35:37,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-11-06 18:35:37,376 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:37,376 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 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] [2019-11-06 18:35:37,580 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:37,581 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:37,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:37,582 INFO L82 PathProgramCache]: Analyzing trace with hash 1603223851, now seen corresponding path program 3 times [2019-11-06 18:35:37,582 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:37,582 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060198622] [2019-11-06 18:35:37,583 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:37,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:37,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:37,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:37,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:37,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:37,701 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-06 18:35:37,702 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060198622] [2019-11-06 18:35:37,703 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776469589] [2019-11-06 18:35:37,703 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2019-11-06 18:35:37,780 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-06 18:35:37,781 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:35:37,782 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 18:35:37,795 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:37,828 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 34 proven. 1 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-11-06 18:35:37,828 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:37,828 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 9 [2019-11-06 18:35:37,829 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241364940] [2019-11-06 18:35:37,829 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 18:35:37,830 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:37,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 18:35:37,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-06 18:35:37,830 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 9 states. [2019-11-06 18:35:37,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:37,941 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2019-11-06 18:35:37,941 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 18:35:37,941 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 52 [2019-11-06 18:35:37,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:37,942 INFO L225 Difference]: With dead ends: 63 [2019-11-06 18:35:37,942 INFO L226 Difference]: Without dead ends: 41 [2019-11-06 18:35:37,942 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-06 18:35:37,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-06 18:35:37,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2019-11-06 18:35:37,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-06 18:35:37,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2019-11-06 18:35:37,949 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 52 [2019-11-06 18:35:37,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:37,950 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2019-11-06 18:35:37,950 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 18:35:37,950 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2019-11-06 18:35:37,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-11-06 18:35:37,951 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:37,951 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:35:38,164 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:38,165 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:38,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:38,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1402505333, now seen corresponding path program 4 times [2019-11-06 18:35:38,166 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:38,166 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709965215] [2019-11-06 18:35:38,167 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:38,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:38,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:38,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:38,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:38,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:38,257 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-11-06 18:35:38,259 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709965215] [2019-11-06 18:35:38,259 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346615595] [2019-11-06 18:35:38,259 INFO L92 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 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 [2019-11-06 18:35:38,317 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:35:38,317 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:35:38,319 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 18:35:38,321 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:38,344 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-11-06 18:35:38,345 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:38,345 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-11-06 18:35:38,345 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302806589] [2019-11-06 18:35:38,347 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 18:35:38,348 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:38,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 18:35:38,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-11-06 18:35:38,348 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 9 states. [2019-11-06 18:35:38,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:38,452 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2019-11-06 18:35:38,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 18:35:38,453 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 56 [2019-11-06 18:35:38,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:38,454 INFO L225 Difference]: With dead ends: 66 [2019-11-06 18:35:38,454 INFO L226 Difference]: Without dead ends: 42 [2019-11-06 18:35:38,454 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-11-06 18:35:38,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-11-06 18:35:38,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2019-11-06 18:35:38,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-06 18:35:38,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2019-11-06 18:35:38,460 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 56 [2019-11-06 18:35:38,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:38,461 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2019-11-06 18:35:38,461 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 18:35:38,461 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2019-11-06 18:35:38,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-11-06 18:35:38,462 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:38,462 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:35:38,666 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:38,666 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:38,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:38,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1995640301, now seen corresponding path program 5 times [2019-11-06 18:35:38,667 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:38,667 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611850814] [2019-11-06 18:35:38,667 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:38,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:38,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:38,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:38,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:38,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:38,789 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-11-06 18:35:38,789 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611850814] [2019-11-06 18:35:38,790 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309059812] [2019-11-06 18:35:38,790 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2019-11-06 18:35:38,899 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-06 18:35:38,899 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:35:38,901 INFO L256 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 18:35:38,903 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:38,982 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 28 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-11-06 18:35:38,983 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:38,984 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2019-11-06 18:35:38,984 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279737613] [2019-11-06 18:35:38,988 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 18:35:38,989 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:38,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 18:35:38,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-11-06 18:35:38,990 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 12 states. [2019-11-06 18:35:39,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:39,190 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2019-11-06 18:35:39,190 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 18:35:39,190 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 58 [2019-11-06 18:35:39,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:39,191 INFO L225 Difference]: With dead ends: 71 [2019-11-06 18:35:39,191 INFO L226 Difference]: Without dead ends: 47 [2019-11-06 18:35:39,192 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2019-11-06 18:35:39,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-11-06 18:35:39,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2019-11-06 18:35:39,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-11-06 18:35:39,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2019-11-06 18:35:39,203 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 58 [2019-11-06 18:35:39,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:39,203 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2019-11-06 18:35:39,203 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 18:35:39,203 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2019-11-06 18:35:39,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-11-06 18:35:39,205 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:39,205 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:35:39,408 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:39,409 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:39,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:39,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1611767219, now seen corresponding path program 6 times [2019-11-06 18:35:39,409 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:39,410 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296295585] [2019-11-06 18:35:39,410 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:39,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:39,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:39,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:39,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:39,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:39,549 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2019-11-06 18:35:39,549 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296295585] [2019-11-06 18:35:39,549 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565878012] [2019-11-06 18:35:39,549 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2019-11-06 18:35:39,626 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-06 18:35:39,626 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:35:39,627 INFO L256 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-06 18:35:39,629 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:39,698 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 56 proven. 9 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2019-11-06 18:35:39,698 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:39,698 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 14 [2019-11-06 18:35:39,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765331578] [2019-11-06 18:35:39,699 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-06 18:35:39,699 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:39,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-06 18:35:39,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-11-06 18:35:39,700 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 14 states. [2019-11-06 18:35:39,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:39,884 INFO L93 Difference]: Finished difference Result 77 states and 89 transitions. [2019-11-06 18:35:39,884 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-06 18:35:39,885 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 66 [2019-11-06 18:35:39,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:39,885 INFO L225 Difference]: With dead ends: 77 [2019-11-06 18:35:39,885 INFO L226 Difference]: Without dead ends: 51 [2019-11-06 18:35:39,886 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2019-11-06 18:35:39,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-11-06 18:35:39,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2019-11-06 18:35:39,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-11-06 18:35:39,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2019-11-06 18:35:39,892 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 66 [2019-11-06 18:35:39,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:39,892 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2019-11-06 18:35:39,892 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-06 18:35:39,893 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2019-11-06 18:35:39,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2019-11-06 18:35:39,894 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:39,894 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 7, 7, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:35:40,094 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:40,095 INFO L410 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:40,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:40,096 INFO L82 PathProgramCache]: Analyzing trace with hash -133387091, now seen corresponding path program 7 times [2019-11-06 18:35:40,096 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:40,096 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030518341] [2019-11-06 18:35:40,097 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:40,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:40,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:40,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:40,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:40,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:40,205 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-11-06 18:35:40,205 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030518341] [2019-11-06 18:35:40,206 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982932438] [2019-11-06 18:35:40,206 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2019-11-06 18:35:40,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:40,278 INFO L256 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-06 18:35:40,280 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:40,301 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-11-06 18:35:40,301 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:40,302 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-11-06 18:35:40,302 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194023861] [2019-11-06 18:35:40,302 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 18:35:40,303 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:40,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 18:35:40,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-11-06 18:35:40,303 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 12 states. [2019-11-06 18:35:40,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:40,371 INFO L93 Difference]: Finished difference Result 80 states and 88 transitions. [2019-11-06 18:35:40,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 18:35:40,371 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 74 [2019-11-06 18:35:40,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:40,372 INFO L225 Difference]: With dead ends: 80 [2019-11-06 18:35:40,372 INFO L226 Difference]: Without dead ends: 52 [2019-11-06 18:35:40,373 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-11-06 18:35:40,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-11-06 18:35:40,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2019-11-06 18:35:40,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-11-06 18:35:40,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2019-11-06 18:35:40,379 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 74 [2019-11-06 18:35:40,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:40,379 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2019-11-06 18:35:40,379 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 18:35:40,380 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2019-11-06 18:35:40,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-11-06 18:35:40,381 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:40,381 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 8, 8, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:35:40,584 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:40,585 INFO L410 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:40,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:40,586 INFO L82 PathProgramCache]: Analyzing trace with hash -430428529, now seen corresponding path program 8 times [2019-11-06 18:35:40,586 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:40,587 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914614594] [2019-11-06 18:35:40,587 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:40,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:40,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:40,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:40,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:40,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:40,707 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-11-06 18:35:40,707 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914614594] [2019-11-06 18:35:40,708 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143622390] [2019-11-06 18:35:40,708 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:40,795 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:35:40,795 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:35:40,796 INFO L256 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-06 18:35:40,802 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:40,827 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-11-06 18:35:40,827 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:40,828 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-11-06 18:35:40,828 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072774045] [2019-11-06 18:35:40,829 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-06 18:35:40,829 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:40,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-06 18:35:40,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-11-06 18:35:40,831 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 13 states. [2019-11-06 18:35:40,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:40,937 INFO L93 Difference]: Finished difference Result 82 states and 90 transitions. [2019-11-06 18:35:40,937 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 18:35:40,938 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 76 [2019-11-06 18:35:40,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:40,939 INFO L225 Difference]: With dead ends: 82 [2019-11-06 18:35:40,939 INFO L226 Difference]: Without dead ends: 54 [2019-11-06 18:35:40,940 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-11-06 18:35:40,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-06 18:35:40,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2019-11-06 18:35:40,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-11-06 18:35:40,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2019-11-06 18:35:40,950 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 76 [2019-11-06 18:35:40,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:40,950 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2019-11-06 18:35:40,950 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-06 18:35:40,950 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2019-11-06 18:35:40,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-11-06 18:35:40,952 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:40,952 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 9, 9, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:35:41,156 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:41,157 INFO L410 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:41,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:41,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1875558385, now seen corresponding path program 9 times [2019-11-06 18:35:41,157 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:41,158 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051236578] [2019-11-06 18:35:41,158 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:41,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:41,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:41,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:41,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:41,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:41,309 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-11-06 18:35:41,309 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051236578] [2019-11-06 18:35:41,309 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510976103] [2019-11-06 18:35:41,310 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2019-11-06 18:35:41,397 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-06 18:35:41,397 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:35:41,398 INFO L256 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 18:35:41,401 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:41,468 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 90 proven. 4 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2019-11-06 18:35:41,469 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:41,469 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5] total 16 [2019-11-06 18:35:41,470 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094214093] [2019-11-06 18:35:41,472 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-06 18:35:41,472 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:41,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-06 18:35:41,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2019-11-06 18:35:41,474 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand 16 states. [2019-11-06 18:35:41,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:41,632 INFO L93 Difference]: Finished difference Result 87 states and 96 transitions. [2019-11-06 18:35:41,632 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-06 18:35:41,632 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 78 [2019-11-06 18:35:41,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:41,633 INFO L225 Difference]: With dead ends: 87 [2019-11-06 18:35:41,633 INFO L226 Difference]: Without dead ends: 59 [2019-11-06 18:35:41,634 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2019-11-06 18:35:41,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-11-06 18:35:41,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 57. [2019-11-06 18:35:41,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-11-06 18:35:41,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2019-11-06 18:35:41,645 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 78 [2019-11-06 18:35:41,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:41,649 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2019-11-06 18:35:41,649 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-06 18:35:41,649 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2019-11-06 18:35:41,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-11-06 18:35:41,650 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:41,650 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 10, 10, 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] [2019-11-06 18:35:41,854 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:41,855 INFO L410 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:41,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:41,855 INFO L82 PathProgramCache]: Analyzing trace with hash 237602385, now seen corresponding path program 10 times [2019-11-06 18:35:41,856 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:41,856 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906035039] [2019-11-06 18:35:41,856 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:41,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:41,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:41,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:41,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:42,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:42,010 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2019-11-06 18:35:42,010 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906035039] [2019-11-06 18:35:42,011 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820805515] [2019-11-06 18:35:42,011 INFO L92 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 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 [2019-11-06 18:35:42,078 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:35:42,078 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:35:42,079 INFO L256 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 18:35:42,081 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:42,154 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 88 proven. 16 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2019-11-06 18:35:42,155 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:42,155 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7] total 19 [2019-11-06 18:35:42,155 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743931835] [2019-11-06 18:35:42,156 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-06 18:35:42,156 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:42,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-06 18:35:42,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2019-11-06 18:35:42,157 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand 19 states. [2019-11-06 18:35:42,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:42,409 INFO L93 Difference]: Finished difference Result 93 states and 105 transitions. [2019-11-06 18:35:42,409 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-06 18:35:42,409 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 82 [2019-11-06 18:35:42,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:42,410 INFO L225 Difference]: With dead ends: 93 [2019-11-06 18:35:42,410 INFO L226 Difference]: Without dead ends: 63 [2019-11-06 18:35:42,411 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=140, Invalid=412, Unknown=0, NotChecked=0, Total=552 [2019-11-06 18:35:42,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-11-06 18:35:42,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2019-11-06 18:35:42,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-11-06 18:35:42,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2019-11-06 18:35:42,421 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 82 [2019-11-06 18:35:42,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:42,422 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2019-11-06 18:35:42,422 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-06 18:35:42,422 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2019-11-06 18:35:42,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-11-06 18:35:42,424 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:42,424 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 11, 11, 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] [2019-11-06 18:35:42,625 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:42,625 INFO L410 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:42,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:42,626 INFO L82 PathProgramCache]: Analyzing trace with hash 537663665, now seen corresponding path program 11 times [2019-11-06 18:35:42,626 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:42,627 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177585649] [2019-11-06 18:35:42,627 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:42,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:42,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:42,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:42,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:42,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:42,803 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2019-11-06 18:35:42,803 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177585649] [2019-11-06 18:35:42,804 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837630733] [2019-11-06 18:35:42,804 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:42,961 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-11-06 18:35:42,961 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:35:42,963 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 18:35:42,965 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:43,067 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 124 proven. 25 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2019-11-06 18:35:43,067 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:43,068 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8] total 21 [2019-11-06 18:35:43,068 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251261297] [2019-11-06 18:35:43,068 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-06 18:35:43,069 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:43,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-06 18:35:43,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2019-11-06 18:35:43,069 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand 21 states. [2019-11-06 18:35:43,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:43,317 INFO L93 Difference]: Finished difference Result 99 states and 111 transitions. [2019-11-06 18:35:43,317 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-06 18:35:43,317 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 90 [2019-11-06 18:35:43,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:43,318 INFO L225 Difference]: With dead ends: 99 [2019-11-06 18:35:43,318 INFO L226 Difference]: Without dead ends: 67 [2019-11-06 18:35:43,319 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=174, Invalid=528, Unknown=0, NotChecked=0, Total=702 [2019-11-06 18:35:43,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-11-06 18:35:43,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2019-11-06 18:35:43,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-11-06 18:35:43,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2019-11-06 18:35:43,325 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 90 [2019-11-06 18:35:43,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:43,325 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2019-11-06 18:35:43,325 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-06 18:35:43,325 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2019-11-06 18:35:43,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-11-06 18:35:43,326 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:43,326 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 12, 12, 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] [2019-11-06 18:35:43,530 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:43,530 INFO L410 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:43,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:43,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1797792017, now seen corresponding path program 12 times [2019-11-06 18:35:43,531 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:43,532 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092964724] [2019-11-06 18:35:43,532 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:43,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:43,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:43,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:43,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:43,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:43,689 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2019-11-06 18:35:43,690 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092964724] [2019-11-06 18:35:43,690 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363767240] [2019-11-06 18:35:43,690 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2019-11-06 18:35:43,810 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-11-06 18:35:43,810 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:35:43,811 INFO L256 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-06 18:35:43,813 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:43,910 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 178 proven. 9 refuted. 0 times theorem prover too weak. 341 trivial. 0 not checked. [2019-11-06 18:35:43,911 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:43,911 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 6] total 20 [2019-11-06 18:35:43,911 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388943169] [2019-11-06 18:35:43,912 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-06 18:35:43,912 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:43,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-06 18:35:43,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2019-11-06 18:35:43,913 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand 20 states. [2019-11-06 18:35:44,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:44,085 INFO L93 Difference]: Finished difference Result 105 states and 114 transitions. [2019-11-06 18:35:44,085 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-06 18:35:44,086 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 98 [2019-11-06 18:35:44,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:44,086 INFO L225 Difference]: With dead ends: 105 [2019-11-06 18:35:44,087 INFO L226 Difference]: Without dead ends: 71 [2019-11-06 18:35:44,087 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2019-11-06 18:35:44,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-11-06 18:35:44,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69. [2019-11-06 18:35:44,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-11-06 18:35:44,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 73 transitions. [2019-11-06 18:35:44,093 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 73 transitions. Word has length 98 [2019-11-06 18:35:44,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:44,093 INFO L462 AbstractCegarLoop]: Abstraction has 69 states and 73 transitions. [2019-11-06 18:35:44,093 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-06 18:35:44,093 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 73 transitions. [2019-11-06 18:35:44,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-11-06 18:35:44,094 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:44,095 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 13, 13, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:35:44,298 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:44,298 INFO L410 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:44,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:44,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1464793713, now seen corresponding path program 13 times [2019-11-06 18:35:44,299 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:44,299 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644629735] [2019-11-06 18:35:44,299 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:44,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:44,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:44,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:44,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:44,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:44,476 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-11-06 18:35:44,477 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644629735] [2019-11-06 18:35:44,477 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898437832] [2019-11-06 18:35:44,477 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2019-11-06 18:35:44,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:44,549 INFO L256 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-06 18:35:44,551 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:44,578 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-11-06 18:35:44,578 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:44,578 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2019-11-06 18:35:44,579 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937069161] [2019-11-06 18:35:44,579 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-06 18:35:44,579 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:44,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-06 18:35:44,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-11-06 18:35:44,580 INFO L87 Difference]: Start difference. First operand 69 states and 73 transitions. Second operand 18 states. [2019-11-06 18:35:44,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:44,696 INFO L93 Difference]: Finished difference Result 108 states and 116 transitions. [2019-11-06 18:35:44,696 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-06 18:35:44,697 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 102 [2019-11-06 18:35:44,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:44,698 INFO L225 Difference]: With dead ends: 108 [2019-11-06 18:35:44,698 INFO L226 Difference]: Without dead ends: 72 [2019-11-06 18:35:44,698 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-11-06 18:35:44,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-11-06 18:35:44,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2019-11-06 18:35:44,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-11-06 18:35:44,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2019-11-06 18:35:44,708 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 102 [2019-11-06 18:35:44,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:44,708 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2019-11-06 18:35:44,708 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-06 18:35:44,708 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2019-11-06 18:35:44,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-11-06 18:35:44,709 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:44,710 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 14, 14, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:35:44,911 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:44,911 INFO L410 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:44,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:44,912 INFO L82 PathProgramCache]: Analyzing trace with hash -238635693, now seen corresponding path program 14 times [2019-11-06 18:35:44,912 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:44,912 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025640593] [2019-11-06 18:35:44,913 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:44,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:45,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:45,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:45,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:45,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:45,137 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-11-06 18:35:45,137 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025640593] [2019-11-06 18:35:45,138 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023767323] [2019-11-06 18:35:45,138 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:45,220 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:35:45,220 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:35:45,221 INFO L256 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-06 18:35:45,223 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:45,243 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-11-06 18:35:45,243 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:45,243 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2019-11-06 18:35:45,244 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794236220] [2019-11-06 18:35:45,244 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-06 18:35:45,244 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:45,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-06 18:35:45,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-11-06 18:35:45,245 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand 19 states. [2019-11-06 18:35:45,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:45,379 INFO L93 Difference]: Finished difference Result 110 states and 118 transitions. [2019-11-06 18:35:45,379 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-06 18:35:45,379 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 104 [2019-11-06 18:35:45,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:45,381 INFO L225 Difference]: With dead ends: 110 [2019-11-06 18:35:45,381 INFO L226 Difference]: Without dead ends: 74 [2019-11-06 18:35:45,382 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-11-06 18:35:45,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-11-06 18:35:45,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2019-11-06 18:35:45,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-11-06 18:35:45,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2019-11-06 18:35:45,386 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 104 [2019-11-06 18:35:45,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:45,387 INFO L462 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2019-11-06 18:35:45,387 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-06 18:35:45,387 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2019-11-06 18:35:45,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2019-11-06 18:35:45,388 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:45,388 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 15, 15, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:35:45,592 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:45,592 INFO L410 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:45,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:45,593 INFO L82 PathProgramCache]: Analyzing trace with hash -851755083, now seen corresponding path program 15 times [2019-11-06 18:35:45,593 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:45,594 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242435283] [2019-11-06 18:35:45,594 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:45,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:45,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:45,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:45,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:45,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:45,807 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-11-06 18:35:45,807 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242435283] [2019-11-06 18:35:45,807 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818006251] [2019-11-06 18:35:45,807 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:45,910 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-06 18:35:45,910 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:35:45,911 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 18:35:45,914 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:46,018 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 178 proven. 16 refuted. 0 times theorem prover too weak. 422 trivial. 0 not checked. [2019-11-06 18:35:46,019 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:46,019 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 7] total 24 [2019-11-06 18:35:46,019 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020731919] [2019-11-06 18:35:46,020 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-06 18:35:46,021 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:46,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-06 18:35:46,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=377, Unknown=0, NotChecked=0, Total=552 [2019-11-06 18:35:46,022 INFO L87 Difference]: Start difference. First operand 73 states and 77 transitions. Second operand 24 states. [2019-11-06 18:35:46,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:46,224 INFO L93 Difference]: Finished difference Result 115 states and 124 transitions. [2019-11-06 18:35:46,224 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-06 18:35:46,225 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 106 [2019-11-06 18:35:46,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:46,226 INFO L225 Difference]: With dead ends: 115 [2019-11-06 18:35:46,226 INFO L226 Difference]: Without dead ends: 79 [2019-11-06 18:35:46,227 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=175, Invalid=377, Unknown=0, NotChecked=0, Total=552 [2019-11-06 18:35:46,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-11-06 18:35:46,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2019-11-06 18:35:46,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-11-06 18:35:46,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2019-11-06 18:35:46,233 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 106 [2019-11-06 18:35:46,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:46,233 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2019-11-06 18:35:46,233 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-06 18:35:46,233 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2019-11-06 18:35:46,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-11-06 18:35:46,234 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:46,234 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 16, 16, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:35:46,440 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:46,440 INFO L410 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:46,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:46,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1460436501, now seen corresponding path program 16 times [2019-11-06 18:35:46,441 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:46,441 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259920719] [2019-11-06 18:35:46,442 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:46,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:46,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:46,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:46,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:46,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:46,674 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-11-06 18:35:46,674 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259920719] [2019-11-06 18:35:46,675 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932012692] [2019-11-06 18:35:46,675 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:46,755 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:35:46,755 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:35:46,756 INFO L256 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-06 18:35:46,759 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:46,781 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-11-06 18:35:46,782 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:46,782 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2019-11-06 18:35:46,782 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566428487] [2019-11-06 18:35:46,782 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-06 18:35:46,783 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:46,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-06 18:35:46,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-11-06 18:35:46,783 INFO L87 Difference]: Start difference. First operand 77 states and 81 transitions. Second operand 21 states. [2019-11-06 18:35:46,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:46,988 INFO L93 Difference]: Finished difference Result 118 states and 126 transitions. [2019-11-06 18:35:46,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-06 18:35:46,988 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 110 [2019-11-06 18:35:46,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:46,989 INFO L225 Difference]: With dead ends: 118 [2019-11-06 18:35:46,990 INFO L226 Difference]: Without dead ends: 80 [2019-11-06 18:35:46,991 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-11-06 18:35:46,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-11-06 18:35:46,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2019-11-06 18:35:46,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-11-06 18:35:46,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2019-11-06 18:35:46,995 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 110 [2019-11-06 18:35:46,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:46,995 INFO L462 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2019-11-06 18:35:46,995 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-06 18:35:46,996 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2019-11-06 18:35:46,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-11-06 18:35:46,996 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:46,997 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:35:47,201 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:47,202 INFO L410 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:47,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:47,202 INFO L82 PathProgramCache]: Analyzing trace with hash 664024823, now seen corresponding path program 17 times [2019-11-06 18:35:47,203 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:47,203 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886696991] [2019-11-06 18:35:47,203 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:47,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:47,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:47,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:47,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:47,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:47,496 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-11-06 18:35:47,497 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886696991] [2019-11-06 18:35:47,497 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008602164] [2019-11-06 18:35:47,497 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:48,175 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2019-11-06 18:35:48,176 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:35:48,178 INFO L256 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-06 18:35:48,179 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:48,295 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 172 proven. 36 refuted. 0 times theorem prover too weak. 481 trivial. 0 not checked. [2019-11-06 18:35:48,296 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:48,296 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 9] total 28 [2019-11-06 18:35:48,296 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370748948] [2019-11-06 18:35:48,297 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-06 18:35:48,298 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:48,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-06 18:35:48,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=529, Unknown=0, NotChecked=0, Total=756 [2019-11-06 18:35:48,298 INFO L87 Difference]: Start difference. First operand 79 states and 83 transitions. Second operand 28 states. [2019-11-06 18:35:48,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:48,648 INFO L93 Difference]: Finished difference Result 123 states and 135 transitions. [2019-11-06 18:35:48,648 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-06 18:35:48,648 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 112 [2019-11-06 18:35:48,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:48,649 INFO L225 Difference]: With dead ends: 123 [2019-11-06 18:35:48,649 INFO L226 Difference]: Without dead ends: 85 [2019-11-06 18:35:48,650 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=297, Invalid=893, Unknown=0, NotChecked=0, Total=1190 [2019-11-06 18:35:48,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-11-06 18:35:48,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 83. [2019-11-06 18:35:48,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-11-06 18:35:48,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 87 transitions. [2019-11-06 18:35:48,655 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 87 transitions. Word has length 112 [2019-11-06 18:35:48,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:48,655 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 87 transitions. [2019-11-06 18:35:48,655 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-06 18:35:48,655 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 87 transitions. [2019-11-06 18:35:48,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-11-06 18:35:48,656 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:48,656 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 18, 18, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:35:48,861 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:48,861 INFO L410 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:48,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:48,862 INFO L82 PathProgramCache]: Analyzing trace with hash -683189417, now seen corresponding path program 18 times [2019-11-06 18:35:48,862 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:48,863 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352028818] [2019-11-06 18:35:48,863 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:48,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:49,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:49,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:49,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:49,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:49,128 INFO L134 CoverageAnalysis]: Checked inductivity of 847 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 523 trivial. 0 not checked. [2019-11-06 18:35:49,128 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352028818] [2019-11-06 18:35:49,128 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997604443] [2019-11-06 18:35:49,128 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:49,541 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-11-06 18:35:49,542 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:35:49,543 INFO L256 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 18:35:49,545 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:49,659 INFO L134 CoverageAnalysis]: Checked inductivity of 847 backedges. 234 proven. 25 refuted. 0 times theorem prover too weak. 588 trivial. 0 not checked. [2019-11-06 18:35:49,659 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:49,659 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 8] total 28 [2019-11-06 18:35:49,660 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595776020] [2019-11-06 18:35:49,660 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-06 18:35:49,660 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:49,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-06 18:35:49,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=517, Unknown=0, NotChecked=0, Total=756 [2019-11-06 18:35:49,661 INFO L87 Difference]: Start difference. First operand 83 states and 87 transitions. Second operand 28 states. [2019-11-06 18:35:49,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:49,929 INFO L93 Difference]: Finished difference Result 129 states and 138 transitions. [2019-11-06 18:35:49,932 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-06 18:35:49,932 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 120 [2019-11-06 18:35:49,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:49,933 INFO L225 Difference]: With dead ends: 129 [2019-11-06 18:35:49,934 INFO L226 Difference]: Without dead ends: 89 [2019-11-06 18:35:49,934 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=239, Invalid=517, Unknown=0, NotChecked=0, Total=756 [2019-11-06 18:35:49,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-11-06 18:35:49,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 87. [2019-11-06 18:35:49,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-11-06 18:35:49,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 91 transitions. [2019-11-06 18:35:49,940 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 91 transitions. Word has length 120 [2019-11-06 18:35:49,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:49,941 INFO L462 AbstractCegarLoop]: Abstraction has 87 states and 91 transitions. [2019-11-06 18:35:49,941 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-06 18:35:49,941 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 91 transitions. [2019-11-06 18:35:49,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-11-06 18:35:49,943 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:49,943 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 19, 19, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:35:50,148 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:50,148 INFO L410 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:50,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:50,149 INFO L82 PathProgramCache]: Analyzing trace with hash 272373175, now seen corresponding path program 19 times [2019-11-06 18:35:50,149 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:50,149 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539980687] [2019-11-06 18:35:50,149 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:50,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:50,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:50,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:50,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:50,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:50,429 INFO L134 CoverageAnalysis]: Checked inductivity of 895 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2019-11-06 18:35:50,429 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539980687] [2019-11-06 18:35:50,429 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925743747] [2019-11-06 18:35:50,429 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:50,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:50,510 INFO L256 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-06 18:35:50,512 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:50,535 INFO L134 CoverageAnalysis]: Checked inductivity of 895 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2019-11-06 18:35:50,535 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:50,535 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 24 [2019-11-06 18:35:50,536 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637479912] [2019-11-06 18:35:50,536 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-06 18:35:50,536 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:50,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-06 18:35:50,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2019-11-06 18:35:50,537 INFO L87 Difference]: Start difference. First operand 87 states and 91 transitions. Second operand 24 states. [2019-11-06 18:35:50,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:50,705 INFO L93 Difference]: Finished difference Result 132 states and 140 transitions. [2019-11-06 18:35:50,705 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-06 18:35:50,705 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 124 [2019-11-06 18:35:50,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:50,706 INFO L225 Difference]: With dead ends: 132 [2019-11-06 18:35:50,707 INFO L226 Difference]: Without dead ends: 90 [2019-11-06 18:35:50,707 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2019-11-06 18:35:50,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-11-06 18:35:50,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2019-11-06 18:35:50,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-11-06 18:35:50,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 93 transitions. [2019-11-06 18:35:50,712 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 93 transitions. Word has length 124 [2019-11-06 18:35:50,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:50,712 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 93 transitions. [2019-11-06 18:35:50,712 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-06 18:35:50,712 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 93 transitions. [2019-11-06 18:35:50,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-11-06 18:35:50,713 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:50,713 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:35:50,916 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:50,916 INFO L410 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:50,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:50,917 INFO L82 PathProgramCache]: Analyzing trace with hash -258630887, now seen corresponding path program 20 times [2019-11-06 18:35:50,918 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:50,918 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402983880] [2019-11-06 18:35:50,918 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:50,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:51,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:51,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:51,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:51,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:51,224 INFO L134 CoverageAnalysis]: Checked inductivity of 934 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2019-11-06 18:35:51,225 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402983880] [2019-11-06 18:35:51,225 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773121036] [2019-11-06 18:35:51,225 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:51,317 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:35:51,317 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:35:51,318 INFO L256 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-06 18:35:51,321 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:51,359 INFO L134 CoverageAnalysis]: Checked inductivity of 934 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2019-11-06 18:35:51,359 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:51,359 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2019-11-06 18:35:51,359 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130118651] [2019-11-06 18:35:51,360 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-06 18:35:51,360 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:51,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-06 18:35:51,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2019-11-06 18:35:51,361 INFO L87 Difference]: Start difference. First operand 89 states and 93 transitions. Second operand 25 states. [2019-11-06 18:35:51,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:51,551 INFO L93 Difference]: Finished difference Result 134 states and 142 transitions. [2019-11-06 18:35:51,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-06 18:35:51,551 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 126 [2019-11-06 18:35:51,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:51,553 INFO L225 Difference]: With dead ends: 134 [2019-11-06 18:35:51,553 INFO L226 Difference]: Without dead ends: 92 [2019-11-06 18:35:51,553 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2019-11-06 18:35:51,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-11-06 18:35:51,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2019-11-06 18:35:51,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-11-06 18:35:51,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 95 transitions. [2019-11-06 18:35:51,561 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 95 transitions. Word has length 126 [2019-11-06 18:35:51,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:51,561 INFO L462 AbstractCegarLoop]: Abstraction has 91 states and 95 transitions. [2019-11-06 18:35:51,561 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-06 18:35:51,561 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 95 transitions. [2019-11-06 18:35:51,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2019-11-06 18:35:51,562 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:51,562 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:35:51,766 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:51,766 INFO L410 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:51,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:51,767 INFO L82 PathProgramCache]: Analyzing trace with hash 547573755, now seen corresponding path program 21 times [2019-11-06 18:35:51,767 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:51,767 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87927561] [2019-11-06 18:35:51,767 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:51,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:52,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:52,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:52,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:52,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:52,057 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2019-11-06 18:35:52,058 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87927561] [2019-11-06 18:35:52,058 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106790078] [2019-11-06 18:35:52,058 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:52,193 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-11-06 18:35:52,193 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:35:52,194 INFO L256 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-06 18:35:52,196 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:52,325 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 234 proven. 36 refuted. 0 times theorem prover too weak. 705 trivial. 0 not checked. [2019-11-06 18:35:52,325 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:52,325 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 9] total 32 [2019-11-06 18:35:52,325 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484849599] [2019-11-06 18:35:52,326 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-11-06 18:35:52,326 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:52,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-11-06 18:35:52,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=679, Unknown=0, NotChecked=0, Total=992 [2019-11-06 18:35:52,327 INFO L87 Difference]: Start difference. First operand 91 states and 95 transitions. Second operand 32 states. [2019-11-06 18:35:52,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:52,629 INFO L93 Difference]: Finished difference Result 139 states and 148 transitions. [2019-11-06 18:35:52,630 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-11-06 18:35:52,630 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 128 [2019-11-06 18:35:52,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:52,631 INFO L225 Difference]: With dead ends: 139 [2019-11-06 18:35:52,631 INFO L226 Difference]: Without dead ends: 97 [2019-11-06 18:35:52,632 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=313, Invalid=679, Unknown=0, NotChecked=0, Total=992 [2019-11-06 18:35:52,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-11-06 18:35:52,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2019-11-06 18:35:52,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2019-11-06 18:35:52,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 99 transitions. [2019-11-06 18:35:52,636 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 99 transitions. Word has length 128 [2019-11-06 18:35:52,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:52,637 INFO L462 AbstractCegarLoop]: Abstraction has 95 states and 99 transitions. [2019-11-06 18:35:52,637 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-11-06 18:35:52,637 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 99 transitions. [2019-11-06 18:35:52,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-11-06 18:35:52,638 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:52,638 INFO L410 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:35:52,842 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:52,842 INFO L410 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:52,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:52,842 INFO L82 PathProgramCache]: Analyzing trace with hash -829264037, now seen corresponding path program 22 times [2019-11-06 18:35:52,842 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:52,843 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126107406] [2019-11-06 18:35:52,843 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:52,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:53,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:53,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:53,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:53,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:53,184 INFO L134 CoverageAnalysis]: Checked inductivity of 1031 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 547 trivial. 0 not checked. [2019-11-06 18:35:53,184 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126107406] [2019-11-06 18:35:53,185 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005722365] [2019-11-06 18:35:53,185 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:53,279 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:35:53,279 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:35:53,281 INFO L256 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-06 18:35:53,283 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:53,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1031 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 547 trivial. 0 not checked. [2019-11-06 18:35:53,326 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:53,326 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 27 [2019-11-06 18:35:53,326 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47581408] [2019-11-06 18:35:53,327 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-06 18:35:53,327 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:53,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-06 18:35:53,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2019-11-06 18:35:53,328 INFO L87 Difference]: Start difference. First operand 95 states and 99 transitions. Second operand 27 states. [2019-11-06 18:35:53,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:53,617 INFO L93 Difference]: Finished difference Result 142 states and 150 transitions. [2019-11-06 18:35:53,618 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-11-06 18:35:53,618 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 132 [2019-11-06 18:35:53,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:53,620 INFO L225 Difference]: With dead ends: 142 [2019-11-06 18:35:53,620 INFO L226 Difference]: Without dead ends: 98 [2019-11-06 18:35:53,621 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2019-11-06 18:35:53,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-11-06 18:35:53,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2019-11-06 18:35:53,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-11-06 18:35:53,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 101 transitions. [2019-11-06 18:35:53,630 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 101 transitions. Word has length 132 [2019-11-06 18:35:53,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:53,631 INFO L462 AbstractCegarLoop]: Abstraction has 97 states and 101 transitions. [2019-11-06 18:35:53,631 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-06 18:35:53,631 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 101 transitions. [2019-11-06 18:35:53,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-11-06 18:35:53,633 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:53,633 INFO L410 BasicCegarLoop]: trace histogram [23, 23, 21, 21, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:35:53,834 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:53,834 INFO L410 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:53,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:53,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1781960003, now seen corresponding path program 23 times [2019-11-06 18:35:53,835 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:53,835 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092550087] [2019-11-06 18:35:53,835 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:53,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:54,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:54,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:54,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:54,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:54,360 INFO L134 CoverageAnalysis]: Checked inductivity of 1076 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 547 trivial. 0 not checked. [2019-11-06 18:35:54,361 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092550087] [2019-11-06 18:35:54,361 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832354491] [2019-11-06 18:35:54,361 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:55,914 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2019-11-06 18:35:55,915 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:35:55,918 INFO L256 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-06 18:35:55,921 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:56,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1076 backedges. 228 proven. 49 refuted. 0 times theorem prover too weak. 799 trivial. 0 not checked. [2019-11-06 18:35:56,083 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:56,083 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 10] total 35 [2019-11-06 18:35:56,083 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246269063] [2019-11-06 18:35:56,084 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-06 18:35:56,084 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:56,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-06 18:35:56,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=819, Unknown=0, NotChecked=0, Total=1190 [2019-11-06 18:35:56,085 INFO L87 Difference]: Start difference. First operand 97 states and 101 transitions. Second operand 35 states. [2019-11-06 18:35:56,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:56,699 INFO L93 Difference]: Finished difference Result 147 states and 159 transitions. [2019-11-06 18:35:56,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-11-06 18:35:56,699 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 134 [2019-11-06 18:35:56,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:56,701 INFO L225 Difference]: With dead ends: 147 [2019-11-06 18:35:56,701 INFO L226 Difference]: Without dead ends: 103 [2019-11-06 18:35:56,703 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=459, Invalid=1347, Unknown=0, NotChecked=0, Total=1806 [2019-11-06 18:35:56,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-11-06 18:35:56,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 101. [2019-11-06 18:35:56,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-11-06 18:35:56,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 105 transitions. [2019-11-06 18:35:56,710 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 105 transitions. Word has length 134 [2019-11-06 18:35:56,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:56,710 INFO L462 AbstractCegarLoop]: Abstraction has 101 states and 105 transitions. [2019-11-06 18:35:56,711 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-11-06 18:35:56,711 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 105 transitions. [2019-11-06 18:35:56,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-11-06 18:35:56,715 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:56,715 INFO L410 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:35:56,923 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:56,923 INFO L410 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:56,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:56,924 INFO L82 PathProgramCache]: Analyzing trace with hash 1049703197, now seen corresponding path program 24 times [2019-11-06 18:35:56,924 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:56,924 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771505349] [2019-11-06 18:35:56,925 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:56,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:57,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:57,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:57,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:57,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:57,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2019-11-06 18:35:57,423 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771505349] [2019-11-06 18:35:57,423 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771057199] [2019-11-06 18:35:57,423 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:58,052 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2019-11-06 18:35:58,052 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:35:58,055 INFO L256 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-06 18:35:58,056 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:58,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 298 proven. 49 refuted. 0 times theorem prover too weak. 917 trivial. 0 not checked. [2019-11-06 18:35:58,197 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:58,197 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 10] total 36 [2019-11-06 18:35:58,198 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019811978] [2019-11-06 18:35:58,198 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-11-06 18:35:58,198 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:58,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-11-06 18:35:58,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=397, Invalid=863, Unknown=0, NotChecked=0, Total=1260 [2019-11-06 18:35:58,199 INFO L87 Difference]: Start difference. First operand 101 states and 105 transitions. Second operand 36 states. [2019-11-06 18:35:58,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:58,513 INFO L93 Difference]: Finished difference Result 153 states and 162 transitions. [2019-11-06 18:35:58,513 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-11-06 18:35:58,513 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 142 [2019-11-06 18:35:58,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:58,514 INFO L225 Difference]: With dead ends: 153 [2019-11-06 18:35:58,515 INFO L226 Difference]: Without dead ends: 107 [2019-11-06 18:35:58,516 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=397, Invalid=863, Unknown=0, NotChecked=0, Total=1260 [2019-11-06 18:35:58,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-11-06 18:35:58,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 105. [2019-11-06 18:35:58,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2019-11-06 18:35:58,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 109 transitions. [2019-11-06 18:35:58,521 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 109 transitions. Word has length 142 [2019-11-06 18:35:58,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:58,522 INFO L462 AbstractCegarLoop]: Abstraction has 105 states and 109 transitions. [2019-11-06 18:35:58,522 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-11-06 18:35:58,522 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 109 transitions. [2019-11-06 18:35:58,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-11-06 18:35:58,522 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:58,523 INFO L410 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:35:58,726 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:58,726 INFO L410 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:58,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:58,727 INFO L82 PathProgramCache]: Analyzing trace with hash -932737411, now seen corresponding path program 25 times [2019-11-06 18:35:58,727 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:58,728 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309451174] [2019-11-06 18:35:58,728 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:58,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:59,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:59,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:59,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:59,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:59,283 INFO L134 CoverageAnalysis]: Checked inductivity of 1328 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2019-11-06 18:35:59,284 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309451174] [2019-11-06 18:35:59,284 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571132782] [2019-11-06 18:35:59,284 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:59,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:59,426 INFO L256 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 27 conjunts are in the unsatisfiable core [2019-11-06 18:35:59,430 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:59,474 INFO L134 CoverageAnalysis]: Checked inductivity of 1328 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2019-11-06 18:35:59,474 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:59,475 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 30 [2019-11-06 18:35:59,475 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220355815] [2019-11-06 18:35:59,476 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-11-06 18:35:59,476 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:59,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-11-06 18:35:59,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2019-11-06 18:35:59,477 INFO L87 Difference]: Start difference. First operand 105 states and 109 transitions. Second operand 30 states. [2019-11-06 18:35:59,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:59,691 INFO L93 Difference]: Finished difference Result 156 states and 164 transitions. [2019-11-06 18:35:59,691 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-11-06 18:35:59,692 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 146 [2019-11-06 18:35:59,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:59,693 INFO L225 Difference]: With dead ends: 156 [2019-11-06 18:35:59,693 INFO L226 Difference]: Without dead ends: 108 [2019-11-06 18:35:59,694 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2019-11-06 18:35:59,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2019-11-06 18:35:59,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2019-11-06 18:35:59,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2019-11-06 18:35:59,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 111 transitions. [2019-11-06 18:35:59,701 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 111 transitions. Word has length 146 [2019-11-06 18:35:59,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:59,701 INFO L462 AbstractCegarLoop]: Abstraction has 107 states and 111 transitions. [2019-11-06 18:35:59,701 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-11-06 18:35:59,701 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 111 transitions. [2019-11-06 18:35:59,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2019-11-06 18:35:59,702 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:59,702 INFO L410 BasicCegarLoop]: trace histogram [26, 26, 24, 24, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:35:59,906 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:59,906 INFO L410 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:59,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:59,906 INFO L82 PathProgramCache]: Analyzing trace with hash 463208031, now seen corresponding path program 26 times [2019-11-06 18:35:59,906 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:59,906 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716758489] [2019-11-06 18:35:59,907 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:59,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:00,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:00,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:00,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:00,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:00,495 INFO L134 CoverageAnalysis]: Checked inductivity of 1379 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2019-11-06 18:36:00,495 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716758489] [2019-11-06 18:36:00,495 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812520488] [2019-11-06 18:36:00,495 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:00,599 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:36:00,599 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:36:00,601 INFO L256 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-06 18:36:00,603 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:36:00,640 INFO L134 CoverageAnalysis]: Checked inductivity of 1379 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2019-11-06 18:36:00,640 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:36:00,640 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 31 [2019-11-06 18:36:00,640 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138369600] [2019-11-06 18:36:00,641 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-11-06 18:36:00,641 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:36:00,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-11-06 18:36:00,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2019-11-06 18:36:00,642 INFO L87 Difference]: Start difference. First operand 107 states and 111 transitions. Second operand 31 states. [2019-11-06 18:36:00,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:36:00,821 INFO L93 Difference]: Finished difference Result 158 states and 166 transitions. [2019-11-06 18:36:00,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-11-06 18:36:00,821 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 148 [2019-11-06 18:36:00,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:36:00,822 INFO L225 Difference]: With dead ends: 158 [2019-11-06 18:36:00,822 INFO L226 Difference]: Without dead ends: 110 [2019-11-06 18:36:00,824 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2019-11-06 18:36:00,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2019-11-06 18:36:00,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2019-11-06 18:36:00,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2019-11-06 18:36:00,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 113 transitions. [2019-11-06 18:36:00,828 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 113 transitions. Word has length 148 [2019-11-06 18:36:00,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:36:00,829 INFO L462 AbstractCegarLoop]: Abstraction has 109 states and 113 transitions. [2019-11-06 18:36:00,829 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-11-06 18:36:00,829 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 113 transitions. [2019-11-06 18:36:00,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-11-06 18:36:00,830 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:36:00,830 INFO L410 BasicCegarLoop]: trace histogram [27, 27, 24, 24, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:36:01,033 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:01,034 INFO L410 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:36:01,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:36:01,035 INFO L82 PathProgramCache]: Analyzing trace with hash 1936981441, now seen corresponding path program 27 times [2019-11-06 18:36:01,035 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:36:01,035 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541087694] [2019-11-06 18:36:01,036 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:36:01,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:01,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:01,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:01,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:01,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:01,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1432 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2019-11-06 18:36:01,471 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541087694] [2019-11-06 18:36:01,471 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510778104] [2019-11-06 18:36:01,471 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:01,705 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-11-06 18:36:01,706 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:36:01,707 INFO L256 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-06 18:36:01,709 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:36:01,983 INFO L134 CoverageAnalysis]: Checked inductivity of 1432 backedges. 296 proven. 64 refuted. 0 times theorem prover too weak. 1072 trivial. 0 not checked. [2019-11-06 18:36:01,983 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:36:01,984 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 11] total 40 [2019-11-06 18:36:01,984 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135203263] [2019-11-06 18:36:01,985 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-11-06 18:36:01,985 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:36:01,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-11-06 18:36:01,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=491, Invalid=1069, Unknown=0, NotChecked=0, Total=1560 [2019-11-06 18:36:01,987 INFO L87 Difference]: Start difference. First operand 109 states and 113 transitions. Second operand 40 states. [2019-11-06 18:36:02,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:36:02,528 INFO L93 Difference]: Finished difference Result 163 states and 175 transitions. [2019-11-06 18:36:02,528 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-11-06 18:36:02,529 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 150 [2019-11-06 18:36:02,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:36:02,530 INFO L225 Difference]: With dead ends: 163 [2019-11-06 18:36:02,530 INFO L226 Difference]: Without dead ends: 115 [2019-11-06 18:36:02,531 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=599, Invalid=1753, Unknown=0, NotChecked=0, Total=2352 [2019-11-06 18:36:02,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-11-06 18:36:02,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 113. [2019-11-06 18:36:02,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-11-06 18:36:02,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 117 transitions. [2019-11-06 18:36:02,536 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 117 transitions. Word has length 150 [2019-11-06 18:36:02,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:36:02,537 INFO L462 AbstractCegarLoop]: Abstraction has 113 states and 117 transitions. [2019-11-06 18:36:02,537 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-11-06 18:36:02,537 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 117 transitions. [2019-11-06 18:36:02,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2019-11-06 18:36:02,538 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:36:02,538 INFO L410 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:36:02,742 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:02,742 INFO L410 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:36:02,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:36:02,743 INFO L82 PathProgramCache]: Analyzing trace with hash 495191585, now seen corresponding path program 28 times [2019-11-06 18:36:02,743 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:36:02,743 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256944678] [2019-11-06 18:36:02,744 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:36:02,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:03,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:03,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:03,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:03,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:03,366 INFO L134 CoverageAnalysis]: Checked inductivity of 1646 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 862 trivial. 0 not checked. [2019-11-06 18:36:03,366 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256944678] [2019-11-06 18:36:03,366 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716715030] [2019-11-06 18:36:03,367 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:03,536 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:36:03,536 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:36:03,539 INFO L256 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-06 18:36:03,549 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:36:03,786 INFO L134 CoverageAnalysis]: Checked inductivity of 1646 backedges. 368 proven. 81 refuted. 0 times theorem prover too weak. 1197 trivial. 0 not checked. [2019-11-06 18:36:03,787 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:36:03,787 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 12] total 42 [2019-11-06 18:36:03,787 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811773330] [2019-11-06 18:36:03,788 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-11-06 18:36:03,788 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:36:03,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-11-06 18:36:03,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=532, Invalid=1190, Unknown=0, NotChecked=0, Total=1722 [2019-11-06 18:36:03,789 INFO L87 Difference]: Start difference. First operand 113 states and 117 transitions. Second operand 42 states. [2019-11-06 18:36:04,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:36:04,288 INFO L93 Difference]: Finished difference Result 169 states and 181 transitions. [2019-11-06 18:36:04,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-11-06 18:36:04,288 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 158 [2019-11-06 18:36:04,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:36:04,289 INFO L225 Difference]: With dead ends: 169 [2019-11-06 18:36:04,289 INFO L226 Difference]: Without dead ends: 119 [2019-11-06 18:36:04,291 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=662, Invalid=1990, Unknown=0, NotChecked=0, Total=2652 [2019-11-06 18:36:04,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2019-11-06 18:36:04,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 117. [2019-11-06 18:36:04,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-11-06 18:36:04,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 121 transitions. [2019-11-06 18:36:04,295 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 121 transitions. Word has length 158 [2019-11-06 18:36:04,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:36:04,296 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 121 transitions. [2019-11-06 18:36:04,296 INFO L463 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-11-06 18:36:04,296 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 121 transitions. [2019-11-06 18:36:04,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-11-06 18:36:04,297 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:36:04,300 INFO L410 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:36:04,500 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:04,501 INFO L410 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:36:04,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:36:04,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1033632639, now seen corresponding path program 29 times [2019-11-06 18:36:04,502 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:36:04,502 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074565855] [2019-11-06 18:36:04,502 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:36:04,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:05,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:05,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:05,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:05,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:05,069 INFO L134 CoverageAnalysis]: Checked inductivity of 1880 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 1039 trivial. 0 not checked. [2019-11-06 18:36:05,070 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074565855] [2019-11-06 18:36:05,070 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558597143] [2019-11-06 18:36:05,071 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:09,251 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) [2019-11-06 18:36:09,251 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:36:09,260 INFO L256 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-06 18:36:09,262 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:36:09,493 INFO L134 CoverageAnalysis]: Checked inductivity of 1880 backedges. 444 proven. 100 refuted. 0 times theorem prover too weak. 1336 trivial. 0 not checked. [2019-11-06 18:36:09,494 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:36:09,494 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 13] total 44 [2019-11-06 18:36:09,494 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628165638] [2019-11-06 18:36:09,495 INFO L442 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-11-06 18:36:09,495 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:36:09,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-11-06 18:36:09,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=575, Invalid=1317, Unknown=0, NotChecked=0, Total=1892 [2019-11-06 18:36:09,496 INFO L87 Difference]: Start difference. First operand 117 states and 121 transitions. Second operand 44 states. [2019-11-06 18:36:10,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:36:10,089 INFO L93 Difference]: Finished difference Result 175 states and 187 transitions. [2019-11-06 18:36:10,090 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-11-06 18:36:10,090 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 166 [2019-11-06 18:36:10,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:36:10,091 INFO L225 Difference]: With dead ends: 175 [2019-11-06 18:36:10,091 INFO L226 Difference]: Without dead ends: 123 [2019-11-06 18:36:10,093 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=729, Invalid=2241, Unknown=0, NotChecked=0, Total=2970 [2019-11-06 18:36:10,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2019-11-06 18:36:10,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 121. [2019-11-06 18:36:10,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-11-06 18:36:10,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 125 transitions. [2019-11-06 18:36:10,098 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 125 transitions. Word has length 166 [2019-11-06 18:36:10,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:36:10,099 INFO L462 AbstractCegarLoop]: Abstraction has 121 states and 125 transitions. [2019-11-06 18:36:10,099 INFO L463 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-11-06 18:36:10,099 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 125 transitions. [2019-11-06 18:36:10,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2019-11-06 18:36:10,100 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:36:10,100 INFO L410 BasicCegarLoop]: trace histogram [33, 33, 30, 30, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:36:10,304 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:10,304 INFO L410 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:36:10,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:36:10,305 INFO L82 PathProgramCache]: Analyzing trace with hash 2110585057, now seen corresponding path program 30 times [2019-11-06 18:36:10,305 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:36:10,306 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662727417] [2019-11-06 18:36:10,306 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:36:10,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:10,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:10,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:10,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:10,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:10,792 INFO L134 CoverageAnalysis]: Checked inductivity of 2134 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 1234 trivial. 0 not checked. [2019-11-06 18:36:10,792 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662727417] [2019-11-06 18:36:10,792 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302246149] [2019-11-06 18:36:10,792 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:11,672 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-11-06 18:36:11,672 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:36:11,675 INFO L256 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-06 18:36:11,678 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:36:11,909 INFO L134 CoverageAnalysis]: Checked inductivity of 2134 backedges. 538 proven. 64 refuted. 0 times theorem prover too weak. 1532 trivial. 0 not checked. [2019-11-06 18:36:11,909 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:36:11,910 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 11] total 43 [2019-11-06 18:36:11,910 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047617075] [2019-11-06 18:36:11,911 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-11-06 18:36:11,911 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:36:11,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-11-06 18:36:11,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=584, Invalid=1222, Unknown=0, NotChecked=0, Total=1806 [2019-11-06 18:36:11,912 INFO L87 Difference]: Start difference. First operand 121 states and 125 transitions. Second operand 43 states. [2019-11-06 18:36:12,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:36:12,141 INFO L93 Difference]: Finished difference Result 181 states and 190 transitions. [2019-11-06 18:36:12,142 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-11-06 18:36:12,142 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 174 [2019-11-06 18:36:12,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:36:12,143 INFO L225 Difference]: With dead ends: 181 [2019-11-06 18:36:12,143 INFO L226 Difference]: Without dead ends: 127 [2019-11-06 18:36:12,145 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=584, Invalid=1222, Unknown=0, NotChecked=0, Total=1806 [2019-11-06 18:36:12,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2019-11-06 18:36:12,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 125. [2019-11-06 18:36:12,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-11-06 18:36:12,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 129 transitions. [2019-11-06 18:36:12,152 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 129 transitions. Word has length 174 [2019-11-06 18:36:12,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:36:12,152 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 129 transitions. [2019-11-06 18:36:12,152 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-11-06 18:36:12,152 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 129 transitions. [2019-11-06 18:36:12,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2019-11-06 18:36:12,153 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:36:12,153 INFO L410 BasicCegarLoop]: trace histogram [33, 33, 31, 31, 9, 9, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:36:12,353 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:12,354 INFO L410 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:36:12,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:36:12,354 INFO L82 PathProgramCache]: Analyzing trace with hash -89801919, now seen corresponding path program 31 times [2019-11-06 18:36:12,354 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:36:12,355 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522171139] [2019-11-06 18:36:12,355 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:36:12,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:13,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:13,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:13,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:13,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:13,238 INFO L134 CoverageAnalysis]: Checked inductivity of 2212 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 1251 trivial. 0 not checked. [2019-11-06 18:36:13,238 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522171139] [2019-11-06 18:36:13,241 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949632853] [2019-11-06 18:36:13,241 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:13,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:13,363 INFO L256 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 33 conjunts are in the unsatisfiable core [2019-11-06 18:36:13,366 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:36:13,415 INFO L134 CoverageAnalysis]: Checked inductivity of 2212 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 1251 trivial. 0 not checked. [2019-11-06 18:36:13,415 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:36:13,416 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 36 [2019-11-06 18:36:13,416 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616118036] [2019-11-06 18:36:13,418 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-11-06 18:36:13,419 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:36:13,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-11-06 18:36:13,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2019-11-06 18:36:13,420 INFO L87 Difference]: Start difference. First operand 125 states and 129 transitions. Second operand 36 states. [2019-11-06 18:36:13,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:36:13,644 INFO L93 Difference]: Finished difference Result 184 states and 192 transitions. [2019-11-06 18:36:13,645 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-11-06 18:36:13,645 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 178 [2019-11-06 18:36:13,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:36:13,646 INFO L225 Difference]: With dead ends: 184 [2019-11-06 18:36:13,646 INFO L226 Difference]: Without dead ends: 128 [2019-11-06 18:36:13,647 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2019-11-06 18:36:13,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2019-11-06 18:36:13,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2019-11-06 18:36:13,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2019-11-06 18:36:13,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 131 transitions. [2019-11-06 18:36:13,654 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 131 transitions. Word has length 178 [2019-11-06 18:36:13,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:36:13,655 INFO L462 AbstractCegarLoop]: Abstraction has 127 states and 131 transitions. [2019-11-06 18:36:13,655 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-11-06 18:36:13,655 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 131 transitions. [2019-11-06 18:36:13,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2019-11-06 18:36:13,656 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:36:13,656 INFO L410 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 9, 9, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:36:13,857 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:13,857 INFO L410 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:36:13,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:36:13,858 INFO L82 PathProgramCache]: Analyzing trace with hash 550642467, now seen corresponding path program 32 times [2019-11-06 18:36:13,858 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:36:13,858 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624781981] [2019-11-06 18:36:13,858 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:36:13,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat