/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/nla-digbench/lcm2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 21:26:27,092 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 21:26:27,095 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 21:26:27,111 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 21:26:27,111 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 21:26:27,112 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 21:26:27,114 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 21:26:27,115 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 21:26:27,126 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 21:26:27,127 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 21:26:27,128 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 21:26:27,130 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 21:26:27,131 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 21:26:27,132 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 21:26:27,134 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 21:26:27,136 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 21:26:27,136 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 21:26:27,139 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 21:26:27,141 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 21:26:27,142 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 21:26:27,144 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 21:26:27,145 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 21:26:27,146 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 21:26:27,146 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 21:26:27,148 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 21:26:27,155 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 21:26:27,156 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 21:26:27,156 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 21:26:27,157 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 21:26:27,171 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 21:26:27,171 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 21:26:27,173 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 21:26:27,174 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 21:26:27,174 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 21:26:27,174 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 21:26:27,174 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 21:26:27,174 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 21:26:27,175 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 21:26:27,175 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 21:26:27,175 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 21:26:27,175 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 21:26:27,175 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 21:26:27,175 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 21:26:27,176 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 21:26:27,176 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 21:26:27,177 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 21:26:27,177 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 21:26:27,177 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 21:26:27,177 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 21:26:27,177 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 21:26:27,178 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 21:26:27,178 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 21:26:27,178 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 21:26:27,178 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 21:26:27,179 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 21:26:27,179 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 21:26:27,179 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 21:26:27,180 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 21:26:27,433 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 21:26:27,445 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 21:26:27,449 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 21:26:27,450 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 21:26:27,451 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 21:26:27,451 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/lcm2.c [2019-11-06 21:26:27,509 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36a7da77e/45787c92de1d4c1ca2ccea1b944438e9/FLAGfa27ed239 [2019-11-06 21:26:27,933 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 21:26:27,934 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/lcm2.c [2019-11-06 21:26:27,940 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36a7da77e/45787c92de1d4c1ca2ccea1b944438e9/FLAGfa27ed239 [2019-11-06 21:26:28,348 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36a7da77e/45787c92de1d4c1ca2ccea1b944438e9 [2019-11-06 21:26:28,357 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 21:26:28,359 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 21:26:28,360 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 21:26:28,360 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 21:26:28,364 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 21:26:28,365 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:26:28" (1/1) ... [2019-11-06 21:26:28,367 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20dc3582 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:26:28, skipping insertion in model container [2019-11-06 21:26:28,368 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:26:28" (1/1) ... [2019-11-06 21:26:28,375 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 21:26:28,393 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 21:26:28,578 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 21:26:28,582 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 21:26:28,601 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 21:26:28,615 INFO L192 MainTranslator]: Completed translation [2019-11-06 21:26:28,615 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:26:28 WrapperNode [2019-11-06 21:26:28,616 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 21:26:28,616 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 21:26:28,616 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 21:26:28,617 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 21:26:28,703 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:26:28" (1/1) ... [2019-11-06 21:26:28,703 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:26:28" (1/1) ... [2019-11-06 21:26:28,709 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:26:28" (1/1) ... [2019-11-06 21:26:28,709 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:26:28" (1/1) ... [2019-11-06 21:26:28,713 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:26:28" (1/1) ... [2019-11-06 21:26:28,718 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:26:28" (1/1) ... [2019-11-06 21:26:28,718 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:26:28" (1/1) ... [2019-11-06 21:26:28,720 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 21:26:28,720 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 21:26:28,721 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 21:26:28,721 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 21:26:28,722 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:26:28" (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 21:26:28,773 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 21:26:28,773 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 21:26:28,773 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-06 21:26:28,773 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 21:26:28,773 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 21:26:28,773 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 21:26:28,774 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-11-06 21:26:28,774 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-06 21:26:28,774 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 21:26:28,774 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 21:26:28,774 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 21:26:28,956 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 21:26:28,956 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 21:26:28,958 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:26:28 BoogieIcfgContainer [2019-11-06 21:26:28,960 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 21:26:28,962 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 21:26:28,962 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 21:26:28,970 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 21:26:28,974 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 09:26:28" (1/3) ... [2019-11-06 21:26:28,975 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a80e123 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:26:28, skipping insertion in model container [2019-11-06 21:26:28,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:26:28" (2/3) ... [2019-11-06 21:26:28,979 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a80e123 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:26:28, skipping insertion in model container [2019-11-06 21:26:28,980 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:26:28" (3/3) ... [2019-11-06 21:26:28,982 INFO L109 eAbstractionObserver]: Analyzing ICFG lcm2.c [2019-11-06 21:26:29,010 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 21:26:29,028 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 21:26:29,047 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 21:26:29,087 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 21:26:29,087 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 21:26:29,087 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 21:26:29,087 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 21:26:29,087 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 21:26:29,088 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 21:26:29,088 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 21:26:29,088 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 21:26:29,103 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2019-11-06 21:26:29,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-06 21:26:29,107 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:26:29,108 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:26:29,109 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:26:29,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:26:29,114 INFO L82 PathProgramCache]: Analyzing trace with hash -858950785, now seen corresponding path program 1 times [2019-11-06 21:26:29,120 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:26:29,121 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231580691] [2019-11-06 21:26:29,121 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:26:29,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:26:29,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:26:29,237 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 21:26:29,238 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231580691] [2019-11-06 21:26:29,239 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 21:26:29,239 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-06 21:26:29,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485264501] [2019-11-06 21:26:29,245 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-06 21:26:29,245 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:26:29,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-06 21:26:29,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-06 21:26:29,262 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2019-11-06 21:26:29,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:26:29,285 INFO L93 Difference]: Finished difference Result 37 states and 49 transitions. [2019-11-06 21:26:29,285 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-06 21:26:29,286 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-11-06 21:26:29,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:26:29,295 INFO L225 Difference]: With dead ends: 37 [2019-11-06 21:26:29,296 INFO L226 Difference]: Without dead ends: 16 [2019-11-06 21:26:29,299 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-06 21:26:29,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-11-06 21:26:29,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-11-06 21:26:29,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-06 21:26:29,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2019-11-06 21:26:29,337 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 10 [2019-11-06 21:26:29,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:26:29,338 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2019-11-06 21:26:29,338 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-06 21:26:29,338 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2019-11-06 21:26:29,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-06 21:26:29,339 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:26:29,339 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:26:29,339 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:26:29,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:26:29,340 INFO L82 PathProgramCache]: Analyzing trace with hash -871939661, now seen corresponding path program 1 times [2019-11-06 21:26:29,340 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:26:29,341 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886003803] [2019-11-06 21:26:29,341 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:26:29,351 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:26:29,351 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [113423090] [2019-11-06 21:26:29,351 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 21:26:29,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:26:29,408 INFO L256 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-06 21:26:29,413 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:26:29,481 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:26:29,519 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 21:26:29,520 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886003803] [2019-11-06 21:26:29,520 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:26:29,520 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113423090] [2019-11-06 21:26:29,521 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 21:26:29,521 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 21:26:29,521 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536552474] [2019-11-06 21:26:29,523 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 21:26:29,523 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:26:29,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 21:26:29,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-06 21:26:29,524 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 5 states. [2019-11-06 21:26:29,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:26:29,602 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2019-11-06 21:26:29,602 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 21:26:29,603 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-11-06 21:26:29,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:26:29,605 INFO L225 Difference]: With dead ends: 27 [2019-11-06 21:26:29,605 INFO L226 Difference]: Without dead ends: 24 [2019-11-06 21:26:29,606 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 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 21:26:29,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-11-06 21:26:29,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2019-11-06 21:26:29,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-06 21:26:29,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2019-11-06 21:26:29,615 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 10 [2019-11-06 21:26:29,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:26:29,615 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2019-11-06 21:26:29,615 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 21:26:29,616 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2019-11-06 21:26:29,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-06 21:26:29,616 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:26:29,617 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:26:29,820 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:26:29,820 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:26:29,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:26:29,822 INFO L82 PathProgramCache]: Analyzing trace with hash 427538464, now seen corresponding path program 1 times [2019-11-06 21:26:29,822 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:26:29,823 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683833881] [2019-11-06 21:26:29,823 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:26:29,831 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:26:29,832 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [54865060] [2019-11-06 21:26:29,832 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 21:26:29,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:26:29,869 INFO L256 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-06 21:26:29,871 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:26:29,931 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:26:29,969 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:26:29,969 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683833881] [2019-11-06 21:26:29,969 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:26:29,970 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54865060] [2019-11-06 21:26:29,973 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:26:29,973 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-11-06 21:26:29,973 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642285833] [2019-11-06 21:26:29,974 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 21:26:29,974 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:26:29,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 21:26:29,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-06 21:26:29,975 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 6 states. [2019-11-06 21:26:30,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:26:30,105 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2019-11-06 21:26:30,106 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 21:26:30,107 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2019-11-06 21:26:30,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:26:30,108 INFO L225 Difference]: With dead ends: 35 [2019-11-06 21:26:30,108 INFO L226 Difference]: Without dead ends: 32 [2019-11-06 21:26:30,109 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-06 21:26:30,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-06 21:26:30,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2019-11-06 21:26:30,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-11-06 21:26:30,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2019-11-06 21:26:30,124 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 18 [2019-11-06 21:26:30,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:26:30,124 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2019-11-06 21:26:30,124 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 21:26:30,124 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2019-11-06 21:26:30,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-06 21:26:30,126 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:26:30,126 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:26:30,327 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:26:30,328 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:26:30,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:26:30,329 INFO L82 PathProgramCache]: Analyzing trace with hash 484796766, now seen corresponding path program 1 times [2019-11-06 21:26:30,329 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:26:30,330 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568685891] [2019-11-06 21:26:30,330 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:26:30,349 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:26:30,350 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [74850335] [2019-11-06 21:26:30,350 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 21:26:30,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:26:30,393 INFO L256 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-06 21:26:30,395 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:26:30,452 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:26:30,481 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:26:30,482 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568685891] [2019-11-06 21:26:30,482 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:26:30,483 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74850335] [2019-11-06 21:26:30,483 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:26:30,483 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-11-06 21:26:30,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730607241] [2019-11-06 21:26:30,484 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 21:26:30,485 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:26:30,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 21:26:30,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-06 21:26:30,486 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand 6 states. [2019-11-06 21:26:30,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:26:30,606 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2019-11-06 21:26:30,606 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 21:26:30,606 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2019-11-06 21:26:30,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:26:30,608 INFO L225 Difference]: With dead ends: 42 [2019-11-06 21:26:30,608 INFO L226 Difference]: Without dead ends: 39 [2019-11-06 21:26:30,608 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-06 21:26:30,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-11-06 21:26:30,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 31. [2019-11-06 21:26:30,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-11-06 21:26:30,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2019-11-06 21:26:30,618 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 18 [2019-11-06 21:26:30,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:26:30,620 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2019-11-06 21:26:30,620 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 21:26:30,620 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2019-11-06 21:26:30,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-06 21:26:30,621 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:26:30,621 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:26:30,826 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:26:30,827 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:26:30,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:26:30,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1597862285, now seen corresponding path program 2 times [2019-11-06 21:26:30,827 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:26:30,828 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120735604] [2019-11-06 21:26:30,828 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:26:30,836 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:26:30,837 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [725565907] [2019-11-06 21:26:30,837 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 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 21:26:30,875 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 21:26:30,875 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:26:30,876 INFO L256 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 23 conjunts are in the unsatisfiable core [2019-11-06 21:26:30,878 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:26:30,951 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:26:30,980 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 21:26:30,981 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120735604] [2019-11-06 21:26:30,981 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:26:30,981 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725565907] [2019-11-06 21:26:30,982 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:26:30,982 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-11-06 21:26:30,982 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074282283] [2019-11-06 21:26:30,983 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 21:26:30,983 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:26:30,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 21:26:30,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-06 21:26:30,984 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand 7 states. [2019-11-06 21:26:31,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:26:31,126 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2019-11-06 21:26:31,127 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 21:26:31,128 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2019-11-06 21:26:31,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:26:31,129 INFO L225 Difference]: With dead ends: 50 [2019-11-06 21:26:31,130 INFO L226 Difference]: Without dead ends: 47 [2019-11-06 21:26:31,130 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-11-06 21:26:31,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-11-06 21:26:31,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 39. [2019-11-06 21:26:31,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-06 21:26:31,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2019-11-06 21:26:31,148 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 26 [2019-11-06 21:26:31,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:26:31,151 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2019-11-06 21:26:31,151 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 21:26:31,151 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2019-11-06 21:26:31,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-06 21:26:31,156 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:26:31,156 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:26:31,360 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:26:31,360 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:26:31,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:26:31,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1655120587, now seen corresponding path program 1 times [2019-11-06 21:26:31,361 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:26:31,361 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094049944] [2019-11-06 21:26:31,361 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:26:31,368 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:26:31,368 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1009230297] [2019-11-06 21:26:31,368 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:26:31,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:26:31,410 INFO L256 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 23 conjunts are in the unsatisfiable core [2019-11-06 21:26:31,412 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:26:31,474 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:26:31,496 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 21:26:31,497 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094049944] [2019-11-06 21:26:31,497 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:26:31,497 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009230297] [2019-11-06 21:26:31,498 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:26:31,498 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-11-06 21:26:31,499 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781473176] [2019-11-06 21:26:31,500 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 21:26:31,500 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:26:31,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 21:26:31,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-06 21:26:31,501 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 7 states. [2019-11-06 21:26:31,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:26:31,629 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2019-11-06 21:26:31,629 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 21:26:31,629 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2019-11-06 21:26:31,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:26:31,631 INFO L225 Difference]: With dead ends: 50 [2019-11-06 21:26:31,631 INFO L226 Difference]: Without dead ends: 47 [2019-11-06 21:26:31,631 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-11-06 21:26:31,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-11-06 21:26:31,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 39. [2019-11-06 21:26:31,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-06 21:26:31,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2019-11-06 21:26:31,640 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 26 [2019-11-06 21:26:31,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:26:31,640 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2019-11-06 21:26:31,640 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 21:26:31,640 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2019-11-06 21:26:31,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-06 21:26:31,641 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:26:31,641 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:26:31,843 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:26:31,844 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:26:31,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:26:31,845 INFO L82 PathProgramCache]: Analyzing trace with hash 586745035, now seen corresponding path program 2 times [2019-11-06 21:26:31,845 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:26:31,846 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18007437] [2019-11-06 21:26:31,846 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:26:31,852 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:26:31,853 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [145957275] [2019-11-06 21:26:31,853 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 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 21:26:31,886 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 21:26:31,886 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:26:31,887 INFO L256 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 23 conjunts are in the unsatisfiable core [2019-11-06 21:26:31,889 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:26:31,954 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:26:31,983 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 21:26:31,983 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18007437] [2019-11-06 21:26:31,983 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:26:31,983 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145957275] [2019-11-06 21:26:31,984 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:26:31,984 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-11-06 21:26:31,984 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146190898] [2019-11-06 21:26:31,984 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 21:26:31,985 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:26:31,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 21:26:31,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-06 21:26:31,985 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 7 states. [2019-11-06 21:26:32,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:26:32,100 INFO L93 Difference]: Finished difference Result 58 states and 65 transitions. [2019-11-06 21:26:32,101 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 21:26:32,101 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2019-11-06 21:26:32,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:26:32,102 INFO L225 Difference]: With dead ends: 58 [2019-11-06 21:26:32,102 INFO L226 Difference]: Without dead ends: 55 [2019-11-06 21:26:32,103 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-11-06 21:26:32,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-11-06 21:26:32,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 47. [2019-11-06 21:26:32,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-11-06 21:26:32,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2019-11-06 21:26:32,112 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 26 [2019-11-06 21:26:32,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:26:32,113 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2019-11-06 21:26:32,113 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 21:26:32,113 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2019-11-06 21:26:32,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-06 21:26:32,114 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:26:32,114 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:26:32,317 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:26:32,318 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:26:32,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:26:32,319 INFO L82 PathProgramCache]: Analyzing trace with hash 644003337, now seen corresponding path program 2 times [2019-11-06 21:26:32,319 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:26:32,320 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636142934] [2019-11-06 21:26:32,320 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:26:32,326 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:26:32,327 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [575257583] [2019-11-06 21:26:32,327 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 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 21:26:32,371 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 21:26:32,371 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:26:32,372 INFO L256 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 23 conjunts are in the unsatisfiable core [2019-11-06 21:26:32,374 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:26:32,436 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:26:32,459 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 21:26:32,459 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636142934] [2019-11-06 21:26:32,459 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:26:32,459 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575257583] [2019-11-06 21:26:32,460 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:26:32,460 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-11-06 21:26:32,460 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897573854] [2019-11-06 21:26:32,461 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 21:26:32,461 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:26:32,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 21:26:32,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-06 21:26:32,462 INFO L87 Difference]: Start difference. First operand 47 states and 52 transitions. Second operand 7 states. [2019-11-06 21:26:32,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:26:32,570 INFO L93 Difference]: Finished difference Result 58 states and 65 transitions. [2019-11-06 21:26:32,570 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 21:26:32,570 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2019-11-06 21:26:32,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:26:32,571 INFO L225 Difference]: With dead ends: 58 [2019-11-06 21:26:32,572 INFO L226 Difference]: Without dead ends: 55 [2019-11-06 21:26:32,572 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-11-06 21:26:32,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-11-06 21:26:32,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 39. [2019-11-06 21:26:32,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-06 21:26:32,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2019-11-06 21:26:32,580 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 26 [2019-11-06 21:26:32,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:26:32,580 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2019-11-06 21:26:32,580 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 21:26:32,580 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2019-11-06 21:26:32,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-06 21:26:32,581 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:26:32,582 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:26:32,785 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:26:32,786 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:26:32,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:26:32,786 INFO L82 PathProgramCache]: Analyzing trace with hash -380015110, now seen corresponding path program 3 times [2019-11-06 21:26:32,787 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:26:32,787 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818923699] [2019-11-06 21:26:32,787 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:26:32,796 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:26:32,796 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [213152233] [2019-11-06 21:26:32,796 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 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 21:26:32,818 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-06 21:26:32,819 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:26:32,821 INFO L256 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-06 21:26:32,823 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:26:32,880 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:26:32,906 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-06 21:26:32,907 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818923699] [2019-11-06 21:26:32,907 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:26:32,907 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213152233] [2019-11-06 21:26:32,907 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:26:32,907 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-11-06 21:26:32,908 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279706177] [2019-11-06 21:26:32,908 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 21:26:32,908 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:26:32,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 21:26:32,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-11-06 21:26:32,909 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 8 states. [2019-11-06 21:26:32,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:26:32,999 INFO L93 Difference]: Finished difference Result 65 states and 72 transitions. [2019-11-06 21:26:33,000 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 21:26:33,000 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 34 [2019-11-06 21:26:33,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:26:33,002 INFO L225 Difference]: With dead ends: 65 [2019-11-06 21:26:33,002 INFO L226 Difference]: Without dead ends: 62 [2019-11-06 21:26:33,003 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-11-06 21:26:33,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-11-06 21:26:33,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 55. [2019-11-06 21:26:33,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-11-06 21:26:33,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2019-11-06 21:26:33,011 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 34 [2019-11-06 21:26:33,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:26:33,012 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2019-11-06 21:26:33,012 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 21:26:33,012 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2019-11-06 21:26:33,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-06 21:26:33,013 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:26:33,013 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:26:33,216 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:26:33,217 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:26:33,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:26:33,217 INFO L82 PathProgramCache]: Analyzing trace with hash -322756808, now seen corresponding path program 3 times [2019-11-06 21:26:33,218 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:26:33,218 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149607280] [2019-11-06 21:26:33,218 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:26:33,225 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:26:33,225 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1601460110] [2019-11-06 21:26:33,226 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 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 21:26:33,249 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-06 21:26:33,249 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:26:33,250 INFO L256 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-06 21:26:33,252 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:26:33,365 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:26:33,396 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-06 21:26:33,397 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149607280] [2019-11-06 21:26:33,397 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:26:33,397 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601460110] [2019-11-06 21:26:33,397 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:26:33,397 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-11-06 21:26:33,398 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745099335] [2019-11-06 21:26:33,398 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 21:26:33,398 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:26:33,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 21:26:33,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2019-11-06 21:26:33,399 INFO L87 Difference]: Start difference. First operand 55 states and 61 transitions. Second operand 9 states. [2019-11-06 21:26:33,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:26:33,512 INFO L93 Difference]: Finished difference Result 73 states and 81 transitions. [2019-11-06 21:26:33,513 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 21:26:33,513 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 34 [2019-11-06 21:26:33,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:26:33,515 INFO L225 Difference]: With dead ends: 73 [2019-11-06 21:26:33,515 INFO L226 Difference]: Without dead ends: 70 [2019-11-06 21:26:33,516 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-11-06 21:26:33,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-11-06 21:26:33,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 47. [2019-11-06 21:26:33,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-11-06 21:26:33,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2019-11-06 21:26:33,525 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 34 [2019-11-06 21:26:33,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:26:33,526 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2019-11-06 21:26:33,526 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 21:26:33,526 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2019-11-06 21:26:33,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-06 21:26:33,527 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:26:33,527 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:26:33,731 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:26:33,732 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:26:33,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:26:33,732 INFO L82 PathProgramCache]: Analyzing trace with hash -1391132360, now seen corresponding path program 4 times [2019-11-06 21:26:33,733 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:26:33,733 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84982324] [2019-11-06 21:26:33,733 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:26:33,739 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:26:33,739 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1299132387] [2019-11-06 21:26:33,739 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 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 21:26:33,775 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 21:26:33,776 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:26:33,777 INFO L256 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-06 21:26:33,779 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:26:36,694 WARN L191 SmtUtils]: Spent 841.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2019-11-06 21:26:44,785 WARN L191 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 24 [2019-11-06 21:26:55,044 WARN L191 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 30 [2019-11-06 21:26:55,050 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:26:57,254 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 8 refuted. 10 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-06 21:26:57,254 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84982324] [2019-11-06 21:26:57,254 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:26:57,255 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299132387] [2019-11-06 21:26:57,255 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:26:57,255 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-11-06 21:26:57,255 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151381856] [2019-11-06 21:26:57,256 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-06 21:26:57,256 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:26:57,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-06 21:26:57,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=61, Unknown=10, NotChecked=0, Total=90 [2019-11-06 21:26:57,256 INFO L87 Difference]: Start difference. First operand 47 states and 52 transitions. Second operand 10 states. [2019-11-06 21:27:15,445 WARN L191 SmtUtils]: Spent 8.06 s on a formula simplification. DAG size of input: 33 DAG size of output: 29