/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-industry-pattern/check_removal_from_set_after_insertion.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 18:49:09,124 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 18:49:09,127 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 18:49:09,145 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 18:49:09,145 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 18:49:09,146 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 18:49:09,147 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 18:49:09,162 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 18:49:09,164 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 18:49:09,165 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 18:49:09,167 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 18:49:09,169 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 18:49:09,169 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 18:49:09,172 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 18:49:09,173 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 18:49:09,174 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 18:49:09,175 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 18:49:09,177 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 18:49:09,179 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 18:49:09,183 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 18:49:09,184 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 18:49:09,186 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 18:49:09,187 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 18:49:09,188 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 18:49:09,190 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 18:49:09,197 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 18:49:09,198 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 18:49:09,199 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 18:49:09,199 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 18:49:09,216 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 18:49:09,216 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 18:49:09,220 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 18:49:09,220 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 18:49:09,220 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 18:49:09,221 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 18:49:09,221 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 18:49:09,221 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 18:49:09,221 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 18:49:09,222 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 18:49:09,222 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 18:49:09,223 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 18:49:09,223 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 18:49:09,223 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 18:49:09,223 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 18:49:09,223 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 18:49:09,224 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 18:49:09,224 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 18:49:09,224 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 18:49:09,224 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 18:49:09,224 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 18:49:09,225 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 18:49:09,226 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 18:49:09,226 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 18:49:09,227 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 18:49:09,227 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 18:49:09,227 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 18:49:09,227 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 18:49:09,227 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 18:49:09,505 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 18:49:09,518 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 18:49:09,521 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 18:49:09,523 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 18:49:09,523 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 18:49:09,524 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/check_removal_from_set_after_insertion.c [2019-11-06 18:49:09,591 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/781ad85ab/8858992b87f34aeca2c6ff44981f784e/FLAG9cb8b6018 [2019-11-06 18:49:10,061 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 18:49:10,062 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-industry-pattern/check_removal_from_set_after_insertion.c [2019-11-06 18:49:10,069 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/781ad85ab/8858992b87f34aeca2c6ff44981f784e/FLAG9cb8b6018 [2019-11-06 18:49:10,452 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/781ad85ab/8858992b87f34aeca2c6ff44981f784e [2019-11-06 18:49:10,463 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 18:49:10,464 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 18:49:10,465 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 18:49:10,466 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 18:49:10,469 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 18:49:10,470 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:49:10" (1/1) ... [2019-11-06 18:49:10,473 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e97d402 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:49:10, skipping insertion in model container [2019-11-06 18:49:10,473 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:49:10" (1/1) ... [2019-11-06 18:49:10,481 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 18:49:10,502 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 18:49:10,702 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:49:10,714 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 18:49:10,738 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:49:10,752 INFO L192 MainTranslator]: Completed translation [2019-11-06 18:49:10,752 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:49:10 WrapperNode [2019-11-06 18:49:10,752 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 18:49:10,753 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 18:49:10,753 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 18:49:10,753 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 18:49:10,850 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:49:10" (1/1) ... [2019-11-06 18:49:10,850 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:49:10" (1/1) ... [2019-11-06 18:49:10,859 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:49:10" (1/1) ... [2019-11-06 18:49:10,859 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:49:10" (1/1) ... [2019-11-06 18:49:10,869 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:49:10" (1/1) ... [2019-11-06 18:49:10,875 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:49:10" (1/1) ... [2019-11-06 18:49:10,878 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:49:10" (1/1) ... [2019-11-06 18:49:10,881 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 18:49:10,881 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 18:49:10,881 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 18:49:10,881 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 18:49:10,882 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:49:10" (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 18:49:10,943 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 18:49:10,943 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 18:49:10,943 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-06 18:49:10,943 INFO L138 BoogieDeclarations]: Found implementation of procedure insert [2019-11-06 18:49:10,943 INFO L138 BoogieDeclarations]: Found implementation of procedure elem_exists [2019-11-06 18:49:10,943 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 18:49:10,944 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 18:49:10,944 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-06 18:49:10,944 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 18:49:10,944 INFO L130 BoogieDeclarations]: Found specification of procedure insert [2019-11-06 18:49:10,944 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-06 18:49:10,944 INFO L130 BoogieDeclarations]: Found specification of procedure elem_exists [2019-11-06 18:49:10,945 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-06 18:49:10,945 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 18:49:10,945 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-06 18:49:10,945 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-06 18:49:10,945 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 18:49:10,945 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 18:49:11,309 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 18:49:11,309 INFO L284 CfgBuilder]: Removed 6 assume(true) statements. [2019-11-06 18:49:11,311 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:49:11 BoogieIcfgContainer [2019-11-06 18:49:11,311 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 18:49:11,312 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 18:49:11,312 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 18:49:11,315 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 18:49:11,315 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 06:49:10" (1/3) ... [2019-11-06 18:49:11,316 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23b661f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:49:11, skipping insertion in model container [2019-11-06 18:49:11,316 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:49:10" (2/3) ... [2019-11-06 18:49:11,317 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23b661f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:49:11, skipping insertion in model container [2019-11-06 18:49:11,317 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:49:11" (3/3) ... [2019-11-06 18:49:11,318 INFO L109 eAbstractionObserver]: Analyzing ICFG check_removal_from_set_after_insertion.c [2019-11-06 18:49:11,326 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 18:49:11,333 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 18:49:11,344 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 18:49:11,368 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 18:49:11,368 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 18:49:11,369 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 18:49:11,369 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 18:49:11,369 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 18:49:11,369 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 18:49:11,369 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 18:49:11,369 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 18:49:11,385 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states. [2019-11-06 18:49:11,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-06 18:49:11,391 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:49:11,392 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:49:11,394 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:49:11,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:49:11,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1521704262, now seen corresponding path program 1 times [2019-11-06 18:49:11,406 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:49:11,406 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017152657] [2019-11-06 18:49:11,407 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:49:11,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:11,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:11,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:49:11,586 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017152657] [2019-11-06 18:49:11,587 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:49:11,587 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 18:49:11,589 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721893891] [2019-11-06 18:49:11,595 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 18:49:11,595 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:49:11,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 18:49:11,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:49:11,611 INFO L87 Difference]: Start difference. First operand 49 states. Second operand 3 states. [2019-11-06 18:49:11,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:49:11,785 INFO L93 Difference]: Finished difference Result 90 states and 124 transitions. [2019-11-06 18:49:11,786 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 18:49:11,787 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2019-11-06 18:49:11,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:49:11,797 INFO L225 Difference]: With dead ends: 90 [2019-11-06 18:49:11,798 INFO L226 Difference]: Without dead ends: 44 [2019-11-06 18:49:11,802 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 18:49:11,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-11-06 18:49:11,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-11-06 18:49:11,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-06 18:49:11,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2019-11-06 18:49:11,850 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 18 [2019-11-06 18:49:11,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:49:11,850 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2019-11-06 18:49:11,850 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 18:49:11,851 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2019-11-06 18:49:11,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-06 18:49:11,852 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:49:11,852 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:49:11,853 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:49:11,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:49:11,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1816604960, now seen corresponding path program 1 times [2019-11-06 18:49:11,854 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:49:11,854 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203245942] [2019-11-06 18:49:11,854 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:49:11,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:11,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:11,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:49:11,982 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203245942] [2019-11-06 18:49:11,982 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:49:11,982 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 18:49:11,983 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003280935] [2019-11-06 18:49:11,984 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:49:11,988 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:49:11,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:49:11,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:49:11,989 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand 4 states. [2019-11-06 18:49:12,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:49:12,157 INFO L93 Difference]: Finished difference Result 61 states and 73 transitions. [2019-11-06 18:49:12,158 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:49:12,158 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2019-11-06 18:49:12,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:49:12,160 INFO L225 Difference]: With dead ends: 61 [2019-11-06 18:49:12,160 INFO L226 Difference]: Without dead ends: 46 [2019-11-06 18:49:12,161 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 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 18:49:12,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-11-06 18:49:12,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2019-11-06 18:49:12,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-11-06 18:49:12,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2019-11-06 18:49:12,172 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 18 [2019-11-06 18:49:12,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:49:12,172 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2019-11-06 18:49:12,173 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:49:12,173 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2019-11-06 18:49:12,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-06 18:49:12,174 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:49:12,174 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:49:12,175 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:49:12,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:49:12,175 INFO L82 PathProgramCache]: Analyzing trace with hash -1871306430, now seen corresponding path program 1 times [2019-11-06 18:49:12,176 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:49:12,176 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256082847] [2019-11-06 18:49:12,176 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:49:12,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:12,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:12,298 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:49:12,299 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256082847] [2019-11-06 18:49:12,299 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612188449] [2019-11-06 18:49:12,299 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 18:49:12,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:12,371 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 18:49:12,378 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:49:12,430 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 18:49:12,431 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:49:12,431 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2019-11-06 18:49:12,432 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169585934] [2019-11-06 18:49:12,432 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:49:12,432 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:49:12,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:49:12,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:49:12,433 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand 4 states. [2019-11-06 18:49:12,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:49:12,528 INFO L93 Difference]: Finished difference Result 94 states and 112 transitions. [2019-11-06 18:49:12,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:49:12,529 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2019-11-06 18:49:12,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:49:12,532 INFO L225 Difference]: With dead ends: 94 [2019-11-06 18:49:12,532 INFO L226 Difference]: Without dead ends: 56 [2019-11-06 18:49:12,533 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:49:12,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-11-06 18:49:12,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 47. [2019-11-06 18:49:12,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-11-06 18:49:12,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2019-11-06 18:49:12,547 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 22 [2019-11-06 18:49:12,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:49:12,547 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2019-11-06 18:49:12,547 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:49:12,547 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2019-11-06 18:49:12,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-06 18:49:12,548 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:49:12,549 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:49:12,752 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:49:12,752 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:49:12,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:49:12,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1487912228, now seen corresponding path program 1 times [2019-11-06 18:49:12,753 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:49:12,754 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911466060] [2019-11-06 18:49:12,754 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:49:12,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:12,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:12,867 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 18:49:12,868 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911466060] [2019-11-06 18:49:12,868 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513758944] [2019-11-06 18:49:12,868 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 18:49:12,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:12,924 INFO L256 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 18:49:12,926 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:49:12,967 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 18:49:12,967 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:49:12,967 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2019-11-06 18:49:12,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994664344] [2019-11-06 18:49:12,968 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 18:49:12,968 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:49:12,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 18:49:12,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-06 18:49:12,974 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand 8 states. [2019-11-06 18:49:13,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:49:13,400 INFO L93 Difference]: Finished difference Result 130 states and 159 transitions. [2019-11-06 18:49:13,401 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-06 18:49:13,401 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2019-11-06 18:49:13,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:49:13,403 INFO L225 Difference]: With dead ends: 130 [2019-11-06 18:49:13,403 INFO L226 Difference]: Without dead ends: 92 [2019-11-06 18:49:13,404 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2019-11-06 18:49:13,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-11-06 18:49:13,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 57. [2019-11-06 18:49:13,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-11-06 18:49:13,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2019-11-06 18:49:13,415 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 24 [2019-11-06 18:49:13,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:49:13,415 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2019-11-06 18:49:13,415 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 18:49:13,415 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2019-11-06 18:49:13,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-06 18:49:13,416 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:49:13,417 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:49:13,628 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:49:13,629 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:49:13,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:49:13,629 INFO L82 PathProgramCache]: Analyzing trace with hash 200624820, now seen corresponding path program 2 times [2019-11-06 18:49:13,630 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:49:13,630 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717600145] [2019-11-06 18:49:13,631 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:49:13,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:13,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:13,692 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 18:49:13,693 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717600145] [2019-11-06 18:49:13,693 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:49:13,693 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 18:49:13,694 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160022393] [2019-11-06 18:49:13,694 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:49:13,694 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:49:13,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:49:13,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:49:13,695 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand 4 states. [2019-11-06 18:49:13,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:49:13,804 INFO L93 Difference]: Finished difference Result 76 states and 89 transitions. [2019-11-06 18:49:13,804 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:49:13,805 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2019-11-06 18:49:13,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:49:13,806 INFO L225 Difference]: With dead ends: 76 [2019-11-06 18:49:13,806 INFO L226 Difference]: Without dead ends: 57 [2019-11-06 18:49:13,807 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 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 18:49:13,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-11-06 18:49:13,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2019-11-06 18:49:13,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-11-06 18:49:13,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 65 transitions. [2019-11-06 18:49:13,816 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 65 transitions. Word has length 29 [2019-11-06 18:49:13,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:49:13,816 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 65 transitions. [2019-11-06 18:49:13,816 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:49:13,817 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 65 transitions. [2019-11-06 18:49:13,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-06 18:49:13,818 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:49:13,818 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:49:13,818 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:49:13,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:49:13,819 INFO L82 PathProgramCache]: Analyzing trace with hash -810492430, now seen corresponding path program 1 times [2019-11-06 18:49:13,819 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:49:13,819 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910240737] [2019-11-06 18:49:13,819 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:49:13,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:13,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:13,902 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-06 18:49:13,902 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910240737] [2019-11-06 18:49:13,902 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:49:13,903 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 18:49:13,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103218147] [2019-11-06 18:49:13,904 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 18:49:13,904 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:49:13,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 18:49:13,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 18:49:13,905 INFO L87 Difference]: Start difference. First operand 57 states and 65 transitions. Second operand 5 states. [2019-11-06 18:49:14,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:49:14,069 INFO L93 Difference]: Finished difference Result 92 states and 107 transitions. [2019-11-06 18:49:14,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 18:49:14,069 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 29 [2019-11-06 18:49:14,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:49:14,070 INFO L225 Difference]: With dead ends: 92 [2019-11-06 18:49:14,071 INFO L226 Difference]: Without dead ends: 64 [2019-11-06 18:49:14,071 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:49:14,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-11-06 18:49:14,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 58. [2019-11-06 18:49:14,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-06 18:49:14,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2019-11-06 18:49:14,079 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 29 [2019-11-06 18:49:14,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:49:14,080 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2019-11-06 18:49:14,080 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 18:49:14,080 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2019-11-06 18:49:14,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-06 18:49:14,081 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:49:14,081 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:49:14,082 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:49:14,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:49:14,082 INFO L82 PathProgramCache]: Analyzing trace with hash -1051127576, now seen corresponding path program 1 times [2019-11-06 18:49:14,082 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:49:14,082 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189570784] [2019-11-06 18:49:14,083 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:49:14,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:14,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:14,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:14,143 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-06 18:49:14,144 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189570784] [2019-11-06 18:49:14,144 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:49:14,144 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 18:49:14,144 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447174094] [2019-11-06 18:49:14,145 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 18:49:14,145 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:49:14,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 18:49:14,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-06 18:49:14,145 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand 5 states. [2019-11-06 18:49:14,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:49:14,262 INFO L93 Difference]: Finished difference Result 107 states and 123 transitions. [2019-11-06 18:49:14,262 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 18:49:14,262 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 39 [2019-11-06 18:49:14,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:49:14,264 INFO L225 Difference]: With dead ends: 107 [2019-11-06 18:49:14,264 INFO L226 Difference]: Without dead ends: 62 [2019-11-06 18:49:14,265 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:49:14,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-11-06 18:49:14,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2019-11-06 18:49:14,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-11-06 18:49:14,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 70 transitions. [2019-11-06 18:49:14,280 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 70 transitions. Word has length 39 [2019-11-06 18:49:14,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:49:14,282 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 70 transitions. [2019-11-06 18:49:14,282 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 18:49:14,283 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 70 transitions. [2019-11-06 18:49:14,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-06 18:49:14,286 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:49:14,286 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:49:14,286 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:49:14,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:49:14,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1308557857, now seen corresponding path program 1 times [2019-11-06 18:49:14,286 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:49:14,287 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049202683] [2019-11-06 18:49:14,287 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:49:14,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:14,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:14,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:14,404 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-06 18:49:14,404 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049202683] [2019-11-06 18:49:14,404 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:49:14,404 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 18:49:14,405 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850474105] [2019-11-06 18:49:14,405 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 18:49:14,405 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:49:14,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 18:49:14,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:49:14,406 INFO L87 Difference]: Start difference. First operand 62 states and 70 transitions. Second operand 6 states. [2019-11-06 18:49:14,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:49:14,587 INFO L93 Difference]: Finished difference Result 120 states and 140 transitions. [2019-11-06 18:49:14,587 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 18:49:14,588 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 39 [2019-11-06 18:49:14,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:49:14,590 INFO L225 Difference]: With dead ends: 120 [2019-11-06 18:49:14,591 INFO L226 Difference]: Without dead ends: 71 [2019-11-06 18:49:14,591 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-11-06 18:49:14,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-11-06 18:49:14,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 67. [2019-11-06 18:49:14,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-11-06 18:49:14,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 77 transitions. [2019-11-06 18:49:14,601 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 77 transitions. Word has length 39 [2019-11-06 18:49:14,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:49:14,601 INFO L462 AbstractCegarLoop]: Abstraction has 67 states and 77 transitions. [2019-11-06 18:49:14,602 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 18:49:14,602 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 77 transitions. [2019-11-06 18:49:14,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-11-06 18:49:14,604 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:49:14,604 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:49:14,604 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:49:14,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:49:14,605 INFO L82 PathProgramCache]: Analyzing trace with hash 998134748, now seen corresponding path program 1 times [2019-11-06 18:49:14,605 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:49:14,605 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108181139] [2019-11-06 18:49:14,605 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:49:14,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:14,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:14,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:14,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:14,738 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-06 18:49:14,738 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108181139] [2019-11-06 18:49:14,739 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027601556] [2019-11-06 18:49:14,739 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 18:49:14,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:14,804 INFO L256 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-06 18:49:14,810 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:49:14,851 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-06 18:49:14,851 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:49:14,851 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2019-11-06 18:49:14,852 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109139478] [2019-11-06 18:49:14,852 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-06 18:49:14,852 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:49:14,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-06 18:49:14,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-11-06 18:49:14,853 INFO L87 Difference]: Start difference. First operand 67 states and 77 transitions. Second operand 10 states. [2019-11-06 18:49:15,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:49:15,312 INFO L93 Difference]: Finished difference Result 163 states and 195 transitions. [2019-11-06 18:49:15,313 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 18:49:15,313 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 44 [2019-11-06 18:49:15,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:49:15,315 INFO L225 Difference]: With dead ends: 163 [2019-11-06 18:49:15,315 INFO L226 Difference]: Without dead ends: 107 [2019-11-06 18:49:15,316 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2019-11-06 18:49:15,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-11-06 18:49:15,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 75. [2019-11-06 18:49:15,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-11-06 18:49:15,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 86 transitions. [2019-11-06 18:49:15,327 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 86 transitions. Word has length 44 [2019-11-06 18:49:15,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:49:15,327 INFO L462 AbstractCegarLoop]: Abstraction has 75 states and 86 transitions. [2019-11-06 18:49:15,327 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-06 18:49:15,328 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 86 transitions. [2019-11-06 18:49:15,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-11-06 18:49:15,329 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:49:15,329 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:49:15,540 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:49:15,540 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:49:15,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:49:15,541 INFO L82 PathProgramCache]: Analyzing trace with hash 2077043499, now seen corresponding path program 1 times [2019-11-06 18:49:15,541 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:49:15,541 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340208729] [2019-11-06 18:49:15,541 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:49:15,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:15,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:15,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:15,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:15,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:15,680 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-06 18:49:15,681 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340208729] [2019-11-06 18:49:15,681 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425230588] [2019-11-06 18:49:15,681 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 18:49:15,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:15,753 INFO L256 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 18:49:15,756 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:49:15,827 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-06 18:49:15,827 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:49:15,828 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 13 [2019-11-06 18:49:15,828 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685864410] [2019-11-06 18:49:15,830 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-06 18:49:15,830 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:49:15,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-06 18:49:15,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2019-11-06 18:49:15,831 INFO L87 Difference]: Start difference. First operand 75 states and 86 transitions. Second operand 13 states. [2019-11-06 18:49:16,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:49:16,251 INFO L93 Difference]: Finished difference Result 173 states and 202 transitions. [2019-11-06 18:49:16,251 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 18:49:16,251 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 56 [2019-11-06 18:49:16,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:49:16,253 INFO L225 Difference]: With dead ends: 173 [2019-11-06 18:49:16,253 INFO L226 Difference]: Without dead ends: 111 [2019-11-06 18:49:16,254 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2019-11-06 18:49:16,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2019-11-06 18:49:16,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 77. [2019-11-06 18:49:16,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-11-06 18:49:16,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 88 transitions. [2019-11-06 18:49:16,265 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 88 transitions. Word has length 56 [2019-11-06 18:49:16,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:49:16,266 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 88 transitions. [2019-11-06 18:49:16,266 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-06 18:49:16,266 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 88 transitions. [2019-11-06 18:49:16,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-11-06 18:49:16,267 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:49:16,267 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:49:16,470 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:49:16,471 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:49:16,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:49:16,472 INFO L82 PathProgramCache]: Analyzing trace with hash -46575987, now seen corresponding path program 2 times [2019-11-06 18:49:16,472 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:49:16,472 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696578444] [2019-11-06 18:49:16,473 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:49:16,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:16,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:16,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:16,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:16,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:16,570 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-06 18:49:16,571 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696578444] [2019-11-06 18:49:16,571 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648889629] [2019-11-06 18:49:16,571 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 18:49:16,649 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:49:16,649 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:49:16,650 INFO L256 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 18:49:16,653 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:49:16,738 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-06 18:49:16,739 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:49:16,739 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2019-11-06 18:49:16,739 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722586139] [2019-11-06 18:49:16,740 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-06 18:49:16,740 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:49:16,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-06 18:49:16,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2019-11-06 18:49:16,741 INFO L87 Difference]: Start difference. First operand 77 states and 88 transitions. Second operand 15 states. [2019-11-06 18:49:17,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:49:17,151 INFO L93 Difference]: Finished difference Result 185 states and 216 transitions. [2019-11-06 18:49:17,151 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 18:49:17,151 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 58 [2019-11-06 18:49:17,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:49:17,153 INFO L225 Difference]: With dead ends: 185 [2019-11-06 18:49:17,153 INFO L226 Difference]: Without dead ends: 123 [2019-11-06 18:49:17,154 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2019-11-06 18:49:17,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2019-11-06 18:49:17,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 79. [2019-11-06 18:49:17,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-11-06 18:49:17,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 90 transitions. [2019-11-06 18:49:17,164 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 90 transitions. Word has length 58 [2019-11-06 18:49:17,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:49:17,164 INFO L462 AbstractCegarLoop]: Abstraction has 79 states and 90 transitions. [2019-11-06 18:49:17,164 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-06 18:49:17,164 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 90 transitions. [2019-11-06 18:49:17,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-11-06 18:49:17,165 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:49:17,165 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:49:17,368 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:49:17,371 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:49:17,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:49:17,372 INFO L82 PathProgramCache]: Analyzing trace with hash -735436433, now seen corresponding path program 3 times [2019-11-06 18:49:17,372 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:49:17,372 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154958108] [2019-11-06 18:49:17,372 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:49:17,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:17,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:17,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:17,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:17,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:17,527 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-06 18:49:17,527 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154958108] [2019-11-06 18:49:17,528 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882935948] [2019-11-06 18:49:17,528 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 18:49:17,643 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-06 18:49:17,644 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:49:17,645 INFO L256 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-06 18:49:17,665 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:49:17,788 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-11-06 18:49:17,788 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:49:17,789 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 14 [2019-11-06 18:49:17,790 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056257191] [2019-11-06 18:49:17,790 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-06 18:49:17,790 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:49:17,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-06 18:49:17,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-11-06 18:49:17,792 INFO L87 Difference]: Start difference. First operand 79 states and 90 transitions. Second operand 14 states. [2019-11-06 18:49:18,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:49:18,362 INFO L93 Difference]: Finished difference Result 214 states and 258 transitions. [2019-11-06 18:49:18,362 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-06 18:49:18,362 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 60 [2019-11-06 18:49:18,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:49:18,364 INFO L225 Difference]: With dead ends: 214 [2019-11-06 18:49:18,364 INFO L226 Difference]: Without dead ends: 152 [2019-11-06 18:49:18,365 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2019-11-06 18:49:18,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2019-11-06 18:49:18,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 90. [2019-11-06 18:49:18,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2019-11-06 18:49:18,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 106 transitions. [2019-11-06 18:49:18,377 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 106 transitions. Word has length 60 [2019-11-06 18:49:18,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:49:18,378 INFO L462 AbstractCegarLoop]: Abstraction has 90 states and 106 transitions. [2019-11-06 18:49:18,378 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-06 18:49:18,378 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 106 transitions. [2019-11-06 18:49:18,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-11-06 18:49:18,379 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:49:18,379 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:49:18,591 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:49:18,591 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:49:18,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:49:18,592 INFO L82 PathProgramCache]: Analyzing trace with hash -1147184898, now seen corresponding path program 4 times [2019-11-06 18:49:18,593 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:49:18,593 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318317348] [2019-11-06 18:49:18,594 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:49:18,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:18,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:18,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:18,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:18,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:18,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:18,742 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2019-11-06 18:49:18,743 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318317348] [2019-11-06 18:49:18,743 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615126853] [2019-11-06 18:49:18,743 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 18:49:18,831 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:49:18,832 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:49:18,834 INFO L256 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-06 18:49:18,846 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:49:18,989 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2019-11-06 18:49:18,990 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:49:18,993 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:49:18,993 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:49:18,993 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:16, output treesize:4 [2019-11-06 18:49:19,007 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:49:19,048 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2019-11-06 18:49:19,049 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:49:19,049 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2019-11-06 18:49:19,049 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132174931] [2019-11-06 18:49:19,050 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-06 18:49:19,050 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:49:19,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-06 18:49:19,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2019-11-06 18:49:19,051 INFO L87 Difference]: Start difference. First operand 90 states and 106 transitions. Second operand 17 states. [2019-11-06 18:49:20,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:49:20,012 INFO L93 Difference]: Finished difference Result 150 states and 183 transitions. [2019-11-06 18:49:20,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-06 18:49:20,013 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 72 [2019-11-06 18:49:20,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:49:20,015 INFO L225 Difference]: With dead ends: 150 [2019-11-06 18:49:20,015 INFO L226 Difference]: Without dead ends: 122 [2019-11-06 18:49:20,017 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=182, Invalid=1078, Unknown=0, NotChecked=0, Total=1260 [2019-11-06 18:49:20,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2019-11-06 18:49:20,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 107. [2019-11-06 18:49:20,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2019-11-06 18:49:20,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 129 transitions. [2019-11-06 18:49:20,030 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 129 transitions. Word has length 72 [2019-11-06 18:49:20,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:49:20,031 INFO L462 AbstractCegarLoop]: Abstraction has 107 states and 129 transitions. [2019-11-06 18:49:20,031 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-06 18:49:20,031 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 129 transitions. [2019-11-06 18:49:20,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2019-11-06 18:49:20,032 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:49:20,032 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:49:20,235 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:49:20,235 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:49:20,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:49:20,236 INFO L82 PathProgramCache]: Analyzing trace with hash 1991284329, now seen corresponding path program 1 times [2019-11-06 18:49:20,236 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:49:20,236 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187385531] [2019-11-06 18:49:20,236 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:49:20,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:20,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:20,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:20,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:20,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:20,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:20,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:20,363 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2019-11-06 18:49:20,364 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187385531] [2019-11-06 18:49:20,364 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167014982] [2019-11-06 18:49:20,364 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:49:20,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:20,452 INFO L256 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-06 18:49:20,454 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:49:20,571 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-11-06 18:49:20,572 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:49:20,572 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2019-11-06 18:49:20,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560735631] [2019-11-06 18:49:20,573 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-06 18:49:20,573 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:49:20,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-06 18:49:20,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2019-11-06 18:49:20,574 INFO L87 Difference]: Start difference. First operand 107 states and 129 transitions. Second operand 16 states. [2019-11-06 18:49:21,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:49:21,196 INFO L93 Difference]: Finished difference Result 307 states and 378 transitions. [2019-11-06 18:49:21,196 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-06 18:49:21,196 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 83 [2019-11-06 18:49:21,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:49:21,198 INFO L225 Difference]: With dead ends: 307 [2019-11-06 18:49:21,198 INFO L226 Difference]: Without dead ends: 219 [2019-11-06 18:49:21,199 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=564, Unknown=0, NotChecked=0, Total=756 [2019-11-06 18:49:21,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2019-11-06 18:49:21,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 119. [2019-11-06 18:49:21,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2019-11-06 18:49:21,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 141 transitions. [2019-11-06 18:49:21,214 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 141 transitions. Word has length 83 [2019-11-06 18:49:21,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:49:21,215 INFO L462 AbstractCegarLoop]: Abstraction has 119 states and 141 transitions. [2019-11-06 18:49:21,215 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-06 18:49:21,215 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 141 transitions. [2019-11-06 18:49:21,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-11-06 18:49:21,216 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:49:21,216 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:49:21,420 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:49:21,421 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:49:21,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:49:21,421 INFO L82 PathProgramCache]: Analyzing trace with hash -655094229, now seen corresponding path program 1 times [2019-11-06 18:49:21,422 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:49:21,422 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624095839] [2019-11-06 18:49:21,422 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:49:21,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:21,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:21,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:21,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:21,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:21,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:21,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:21,553 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2019-11-06 18:49:21,554 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624095839] [2019-11-06 18:49:21,554 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673450116] [2019-11-06 18:49:21,554 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:49:21,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:21,646 INFO L256 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-06 18:49:21,648 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:49:21,777 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-11-06 18:49:21,778 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:49:21,778 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2019-11-06 18:49:21,778 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120229981] [2019-11-06 18:49:21,779 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-06 18:49:21,779 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:49:21,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-06 18:49:21,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2019-11-06 18:49:21,780 INFO L87 Difference]: Start difference. First operand 119 states and 141 transitions. Second operand 18 states. [2019-11-06 18:49:22,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:49:22,580 INFO L93 Difference]: Finished difference Result 310 states and 380 transitions. [2019-11-06 18:49:22,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-06 18:49:22,581 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 86 [2019-11-06 18:49:22,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:49:22,582 INFO L225 Difference]: With dead ends: 310 [2019-11-06 18:49:22,583 INFO L226 Difference]: Without dead ends: 212 [2019-11-06 18:49:22,584 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=557, Unknown=0, NotChecked=0, Total=702 [2019-11-06 18:49:22,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2019-11-06 18:49:22,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 130. [2019-11-06 18:49:22,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2019-11-06 18:49:22,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 157 transitions. [2019-11-06 18:49:22,602 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 157 transitions. Word has length 86 [2019-11-06 18:49:22,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:49:22,603 INFO L462 AbstractCegarLoop]: Abstraction has 130 states and 157 transitions. [2019-11-06 18:49:22,603 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-06 18:49:22,603 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 157 transitions. [2019-11-06 18:49:22,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-11-06 18:49:22,604 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:49:22,605 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:49:22,811 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:49:22,811 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:49:22,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:49:22,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1400710534, now seen corresponding path program 2 times [2019-11-06 18:49:22,812 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:49:22,812 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60574238] [2019-11-06 18:49:22,812 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:49:22,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:22,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:22,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:22,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:22,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:22,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:22,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:22,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:22,988 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2019-11-06 18:49:22,989 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60574238] [2019-11-06 18:49:22,989 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509343686] [2019-11-06 18:49:22,989 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 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 18:49:23,084 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:49:23,085 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:49:23,086 INFO L256 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-06 18:49:23,088 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:49:23,273 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2019-11-06 18:49:23,273 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:49:23,273 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2019-11-06 18:49:23,274 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998536308] [2019-11-06 18:49:23,274 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-06 18:49:23,274 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:49:23,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-06 18:49:23,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2019-11-06 18:49:23,275 INFO L87 Difference]: Start difference. First operand 130 states and 157 transitions. Second operand 20 states. [2019-11-06 18:49:24,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:49:24,100 INFO L93 Difference]: Finished difference Result 340 states and 422 transitions. [2019-11-06 18:49:24,101 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-06 18:49:24,101 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 98 [2019-11-06 18:49:24,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:49:24,103 INFO L225 Difference]: With dead ends: 340 [2019-11-06 18:49:24,103 INFO L226 Difference]: Without dead ends: 233 [2019-11-06 18:49:24,104 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=177, Invalid=693, Unknown=0, NotChecked=0, Total=870 [2019-11-06 18:49:24,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2019-11-06 18:49:24,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 141. [2019-11-06 18:49:24,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-11-06 18:49:24,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 173 transitions. [2019-11-06 18:49:24,118 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 173 transitions. Word has length 98 [2019-11-06 18:49:24,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:49:24,119 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 173 transitions. [2019-11-06 18:49:24,119 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-06 18:49:24,119 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 173 transitions. [2019-11-06 18:49:24,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-11-06 18:49:24,120 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:49:24,121 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:49:24,324 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:49:24,325 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:49:24,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:49:24,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1323250423, now seen corresponding path program 3 times [2019-11-06 18:49:24,326 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:49:24,326 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726301202] [2019-11-06 18:49:24,326 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:49:24,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:24,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:24,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:24,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:24,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:24,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:24,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:24,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:24,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:24,493 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2019-11-06 18:49:24,494 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726301202] [2019-11-06 18:49:24,494 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094342295] [2019-11-06 18:49:24,494 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 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 18:49:24,596 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-06 18:49:24,596 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:49:24,597 INFO L256 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 18:49:24,599 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:49:24,662 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2019-11-06 18:49:24,663 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:49:24,663 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 7] total 19 [2019-11-06 18:49:24,663 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682421689] [2019-11-06 18:49:24,664 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-06 18:49:24,664 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:49:24,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-06 18:49:24,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=225, Unknown=0, NotChecked=0, Total=342 [2019-11-06 18:49:24,665 INFO L87 Difference]: Start difference. First operand 141 states and 173 transitions. Second operand 19 states. [2019-11-06 18:49:25,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:49:25,890 INFO L93 Difference]: Finished difference Result 418 states and 522 transitions. [2019-11-06 18:49:25,891 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-11-06 18:49:25,891 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 110 [2019-11-06 18:49:25,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:49:25,894 INFO L225 Difference]: With dead ends: 418 [2019-11-06 18:49:25,895 INFO L226 Difference]: Without dead ends: 302 [2019-11-06 18:49:25,899 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=455, Invalid=1185, Unknown=0, NotChecked=0, Total=1640 [2019-11-06 18:49:25,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2019-11-06 18:49:25,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 150. [2019-11-06 18:49:25,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2019-11-06 18:49:25,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 183 transitions. [2019-11-06 18:49:25,925 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 183 transitions. Word has length 110 [2019-11-06 18:49:25,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:49:25,925 INFO L462 AbstractCegarLoop]: Abstraction has 150 states and 183 transitions. [2019-11-06 18:49:25,926 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-06 18:49:25,926 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 183 transitions. [2019-11-06 18:49:25,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-11-06 18:49:25,929 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:49:25,929 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:49:26,133 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:49:26,134 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:49:26,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:49:26,134 INFO L82 PathProgramCache]: Analyzing trace with hash 2110925161, now seen corresponding path program 4 times [2019-11-06 18:49:26,134 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:49:26,135 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36137679] [2019-11-06 18:49:26,135 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:49:26,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:26,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:26,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:26,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:26,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:26,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:26,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:26,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:26,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:26,477 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2019-11-06 18:49:26,477 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36137679] [2019-11-06 18:49:26,478 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102365240] [2019-11-06 18:49:26,478 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 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 18:49:26,596 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:49:26,597 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:49:26,598 INFO L256 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 25 conjunts are in the unsatisfiable core [2019-11-06 18:49:26,602 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:49:26,769 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:49:26,771 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:49:26,772 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:49:26,773 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:49:26,774 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 35 [2019-11-06 18:49:26,775 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:49:26,783 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:49:26,784 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-06 18:49:26,784 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:35 [2019-11-06 18:49:35,403 WARN L191 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 23 [2019-11-06 18:49:39,480 WARN L191 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 25 [2019-11-06 18:49:39,489 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:49:39,490 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:49:39,490 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:49:39,491 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:49:39,492 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 11 [2019-11-06 18:49:39,492 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:49:39,502 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:49:39,502 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:49:39,502 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:4 [2019-11-06 18:49:39,527 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:49:39,609 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2019-11-06 18:49:39,609 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:49:39,609 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2019-11-06 18:49:39,610 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011660595] [2019-11-06 18:49:39,610 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-06 18:49:39,610 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:49:39,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-06 18:49:39,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=638, Unknown=5, NotChecked=0, Total=756 [2019-11-06 18:49:39,611 INFO L87 Difference]: Start difference. First operand 150 states and 183 transitions. Second operand 28 states.