/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/reducercommutativity/sum10-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:11:42,131 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:11:42,133 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:11:42,144 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 22:11:42,145 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 22:11:42,146 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 22:11:42,147 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 22:11:42,149 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 22:11:42,151 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 22:11:42,151 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 22:11:42,152 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 22:11:42,153 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 22:11:42,154 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:11:42,155 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:11:42,156 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:11:42,157 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:11:42,157 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:11:42,158 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:11:42,160 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:11:42,162 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:11:42,163 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:11:42,164 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:11:42,165 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:11:42,166 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:11:42,168 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:11:42,175 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:11:42,176 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:11:42,177 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:11:42,178 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 22:11:42,191 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:11:42,192 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:11:42,193 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:11:42,193 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:11:42,193 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:11:42,193 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:11:42,194 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:11:42,194 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:11:42,194 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:11:42,194 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:11:42,194 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:11:42,195 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:11:42,195 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:11:42,195 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:11:42,195 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:11:42,195 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:11:42,195 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:11:42,196 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:11:42,196 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:11:42,196 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:11:42,196 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:11:42,197 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:11:42,197 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:11:42,197 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:11:42,197 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:11:42,197 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:11:42,198 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:11:42,198 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:11:42,198 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 22:11:42,522 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:11:42,545 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:11:42,548 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:11:42,550 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:11:42,551 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:11:42,551 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/sum10-1.i [2019-11-06 22:11:42,627 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc19a289a/9640e40e26a34d629eb52b59741697f0/FLAGebe07e9b7 [2019-11-06 22:11:43,116 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:11:43,117 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/sum10-1.i [2019-11-06 22:11:43,124 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc19a289a/9640e40e26a34d629eb52b59741697f0/FLAGebe07e9b7 [2019-11-06 22:11:43,462 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc19a289a/9640e40e26a34d629eb52b59741697f0 [2019-11-06 22:11:43,471 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:11:43,472 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:11:43,473 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:11:43,474 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:11:43,477 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:11:43,478 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:11:43" (1/1) ... [2019-11-06 22:11:43,481 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a42d297 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:11:43, skipping insertion in model container [2019-11-06 22:11:43,482 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:11:43" (1/1) ... [2019-11-06 22:11:43,489 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:11:43,507 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:11:43,697 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:11:43,708 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:11:43,732 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:11:43,749 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:11:43,749 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:11:43 WrapperNode [2019-11-06 22:11:43,750 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:11:43,750 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:11:43,750 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:11:43,751 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:11:43,850 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:11:43" (1/1) ... [2019-11-06 22:11:43,850 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:11:43" (1/1) ... [2019-11-06 22:11:43,858 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:11:43" (1/1) ... [2019-11-06 22:11:43,858 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:11:43" (1/1) ... [2019-11-06 22:11:43,867 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:11:43" (1/1) ... [2019-11-06 22:11:43,873 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:11:43" (1/1) ... [2019-11-06 22:11:43,874 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:11:43" (1/1) ... [2019-11-06 22:11:43,877 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:11:43,877 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:11:43,878 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:11:43,878 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:11:43,879 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:11:43" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:11:43,932 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:11:43,932 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:11:43,932 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2019-11-06 22:11:43,932 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:11:43,932 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:11:43,933 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:11:43,933 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2019-11-06 22:11:43,933 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-06 22:11:43,933 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:11:43,933 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-06 22:11:43,933 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-06 22:11:43,933 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-06 22:11:43,934 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:11:43,934 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:11:44,234 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:11:44,234 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-11-06 22:11:44,235 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:11:44 BoogieIcfgContainer [2019-11-06 22:11:44,235 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:11:44,238 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:11:44,238 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:11:44,244 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:11:44,245 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:11:43" (1/3) ... [2019-11-06 22:11:44,245 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b1d782 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:11:44, skipping insertion in model container [2019-11-06 22:11:44,246 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:11:43" (2/3) ... [2019-11-06 22:11:44,246 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b1d782 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:11:44, skipping insertion in model container [2019-11-06 22:11:44,246 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:11:44" (3/3) ... [2019-11-06 22:11:44,252 INFO L109 eAbstractionObserver]: Analyzing ICFG sum10-1.i [2019-11-06 22:11:44,263 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:11:44,270 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:11:44,280 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:11:44,304 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:11:44,304 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:11:44,304 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:11:44,304 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:11:44,304 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:11:44,304 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:11:44,304 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:11:44,304 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:11:44,318 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2019-11-06 22:11:44,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-06 22:11:44,324 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:44,324 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:11:44,326 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:44,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:44,331 INFO L82 PathProgramCache]: Analyzing trace with hash -1461178031, now seen corresponding path program 1 times [2019-11-06 22:11:44,337 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:44,338 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137054493] [2019-11-06 22:11:44,338 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:44,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:44,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:44,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:44,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:44,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:44,550 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-06 22:11:44,551 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137054493] [2019-11-06 22:11:44,552 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:11:44,552 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:11:44,553 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168354628] [2019-11-06 22:11:44,558 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:11:44,559 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:44,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:11:44,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:11:44,577 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 3 states. [2019-11-06 22:11:44,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:44,687 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2019-11-06 22:11:44,687 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:11:44,689 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2019-11-06 22:11:44,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:44,699 INFO L225 Difference]: With dead ends: 54 [2019-11-06 22:11:44,699 INFO L226 Difference]: Without dead ends: 26 [2019-11-06 22:11:44,703 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 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 22:11:44,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-06 22:11:44,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-11-06 22:11:44,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-06 22:11:44,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2019-11-06 22:11:44,748 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 32 [2019-11-06 22:11:44,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:44,749 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2019-11-06 22:11:44,749 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:11:44,749 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2019-11-06 22:11:44,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-06 22:11:44,752 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:44,752 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:11:44,752 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:44,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:44,753 INFO L82 PathProgramCache]: Analyzing trace with hash -595992629, now seen corresponding path program 1 times [2019-11-06 22:11:44,753 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:44,753 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549049643] [2019-11-06 22:11:44,753 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:44,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:44,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:44,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:44,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:44,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:44,907 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-06 22:11:44,907 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549049643] [2019-11-06 22:11:44,908 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892432471] [2019-11-06 22:11:44,908 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 22:11:44,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:45,000 INFO L256 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-06 22:11:45,007 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:11:45,045 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-06 22:11:45,046 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:11:45,046 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2019-11-06 22:11:45,047 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860893086] [2019-11-06 22:11:45,050 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:11:45,050 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:45,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:11:45,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:11:45,052 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 3 states. [2019-11-06 22:11:45,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:45,078 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2019-11-06 22:11:45,080 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:11:45,080 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2019-11-06 22:11:45,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:45,081 INFO L225 Difference]: With dead ends: 46 [2019-11-06 22:11:45,082 INFO L226 Difference]: Without dead ends: 28 [2019-11-06 22:11:45,083 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:11:45,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-06 22:11:45,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2019-11-06 22:11:45,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-06 22:11:45,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2019-11-06 22:11:45,100 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 32 [2019-11-06 22:11:45,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:45,102 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2019-11-06 22:11:45,102 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:11:45,102 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2019-11-06 22:11:45,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-06 22:11:45,104 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:45,104 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:11:45,308 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:45,308 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:45,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:45,309 INFO L82 PathProgramCache]: Analyzing trace with hash 169606189, now seen corresponding path program 1 times [2019-11-06 22:11:45,310 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:45,310 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252086000] [2019-11-06 22:11:45,310 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:45,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:45,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:45,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:45,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:45,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:45,450 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-06 22:11:45,452 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252086000] [2019-11-06 22:11:45,452 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037168326] [2019-11-06 22:11:45,453 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 22:11:45,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:45,517 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-06 22:11:45,520 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:11:45,526 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-06 22:11:45,527 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:11:45,527 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2019-11-06 22:11:45,527 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96361120] [2019-11-06 22:11:45,528 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:11:45,528 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:45,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:11:45,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:11:45,529 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 3 states. [2019-11-06 22:11:45,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:45,551 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2019-11-06 22:11:45,552 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:11:45,552 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 34 [2019-11-06 22:11:45,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:45,553 INFO L225 Difference]: With dead ends: 46 [2019-11-06 22:11:45,553 INFO L226 Difference]: Without dead ends: 29 [2019-11-06 22:11:45,554 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:11:45,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-06 22:11:45,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-11-06 22:11:45,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-06 22:11:45,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2019-11-06 22:11:45,561 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 34 [2019-11-06 22:11:45,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:45,562 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2019-11-06 22:11:45,562 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:11:45,562 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2019-11-06 22:11:45,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-11-06 22:11:45,564 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:45,564 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:11:45,773 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:45,774 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:45,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:45,775 INFO L82 PathProgramCache]: Analyzing trace with hash -1462689141, now seen corresponding path program 1 times [2019-11-06 22:11:45,775 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:45,776 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580739063] [2019-11-06 22:11:45,776 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:45,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:45,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:45,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:45,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:45,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:45,927 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-06 22:11:45,928 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580739063] [2019-11-06 22:11:45,928 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375770649] [2019-11-06 22:11:45,928 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 22:11:46,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:46,003 INFO L256 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-06 22:11:46,005 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:11:46,021 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-11-06 22:11:46,021 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:11:46,022 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-11-06 22:11:46,022 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191758864] [2019-11-06 22:11:46,022 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:11:46,023 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:46,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:11:46,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:11:46,023 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 3 states. [2019-11-06 22:11:46,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:46,040 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2019-11-06 22:11:46,040 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:11:46,040 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 40 [2019-11-06 22:11:46,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:46,042 INFO L225 Difference]: With dead ends: 43 [2019-11-06 22:11:46,042 INFO L226 Difference]: Without dead ends: 30 [2019-11-06 22:11:46,042 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:11:46,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-06 22:11:46,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2019-11-06 22:11:46,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-06 22:11:46,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2019-11-06 22:11:46,057 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 40 [2019-11-06 22:11:46,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:46,059 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2019-11-06 22:11:46,060 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:11:46,060 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2019-11-06 22:11:46,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-11-06 22:11:46,064 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:46,064 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:11:46,270 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:46,270 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:46,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:46,272 INFO L82 PathProgramCache]: Analyzing trace with hash -233991671, now seen corresponding path program 1 times [2019-11-06 22:11:46,272 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:46,273 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945587638] [2019-11-06 22:11:46,273 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:46,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:46,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:46,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:46,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:46,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:46,419 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-06 22:11:46,420 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945587638] [2019-11-06 22:11:46,420 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663956641] [2019-11-06 22:11:46,420 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 22:11:46,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:46,482 INFO L256 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 22:11:46,486 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:11:46,509 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-11-06 22:11:46,509 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:11:46,509 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 8 [2019-11-06 22:11:46,510 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035744378] [2019-11-06 22:11:46,510 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 22:11:46,511 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:46,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 22:11:46,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-06 22:11:46,514 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 8 states. [2019-11-06 22:11:46,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:46,659 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2019-11-06 22:11:46,659 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:11:46,659 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 42 [2019-11-06 22:11:46,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:46,660 INFO L225 Difference]: With dead ends: 55 [2019-11-06 22:11:46,661 INFO L226 Difference]: Without dead ends: 35 [2019-11-06 22:11:46,661 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2019-11-06 22:11:46,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-06 22:11:46,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2019-11-06 22:11:46,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-06 22:11:46,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2019-11-06 22:11:46,668 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 42 [2019-11-06 22:11:46,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:46,668 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2019-11-06 22:11:46,668 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 22:11:46,669 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2019-11-06 22:11:46,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-11-06 22:11:46,670 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:46,670 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:11:46,873 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:46,874 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:46,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:46,874 INFO L82 PathProgramCache]: Analyzing trace with hash -52274487, now seen corresponding path program 2 times [2019-11-06 22:11:46,874 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:46,876 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062444792] [2019-11-06 22:11:46,876 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:46,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:46,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:46,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:46,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:46,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:46,996 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-06 22:11:46,997 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062444792] [2019-11-06 22:11:46,997 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513609459] [2019-11-06 22:11:46,997 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 22:11:47,056 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 22:11:47,057 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:11:47,058 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:11:47,072 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:11:47,086 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-06 22:11:47,087 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:11:47,087 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-11-06 22:11:47,088 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275573964] [2019-11-06 22:11:47,088 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 22:11:47,088 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:47,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 22:11:47,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:11:47,089 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 7 states. [2019-11-06 22:11:47,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:47,171 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2019-11-06 22:11:47,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 22:11:47,171 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 50 [2019-11-06 22:11:47,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:47,172 INFO L225 Difference]: With dead ends: 58 [2019-11-06 22:11:47,172 INFO L226 Difference]: Without dead ends: 36 [2019-11-06 22:11:47,173 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:11:47,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-06 22:11:47,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2019-11-06 22:11:47,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-06 22:11:47,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2019-11-06 22:11:47,180 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 50 [2019-11-06 22:11:47,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:47,180 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2019-11-06 22:11:47,180 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 22:11:47,181 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2019-11-06 22:11:47,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-11-06 22:11:47,182 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:47,182 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:11:47,383 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:47,383 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:47,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:47,384 INFO L82 PathProgramCache]: Analyzing trace with hash 602858155, now seen corresponding path program 3 times [2019-11-06 22:11:47,384 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:47,384 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176535446] [2019-11-06 22:11:47,384 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:47,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:47,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:47,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:47,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:47,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:47,522 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-06 22:11:47,525 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176535446] [2019-11-06 22:11:47,525 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545563981] [2019-11-06 22:11:47,526 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 22:11:47,577 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-06 22:11:47,577 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:11:47,578 INFO L256 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 22:11:47,580 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:11:47,607 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 34 proven. 1 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-11-06 22:11:47,607 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:11:47,607 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 9 [2019-11-06 22:11:47,607 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120714721] [2019-11-06 22:11:47,608 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 22:11:47,608 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:47,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 22:11:47,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:11:47,609 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 9 states. [2019-11-06 22:11:47,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:47,714 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2019-11-06 22:11:47,715 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 22:11:47,715 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 52 [2019-11-06 22:11:47,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:47,716 INFO L225 Difference]: With dead ends: 63 [2019-11-06 22:11:47,716 INFO L226 Difference]: Without dead ends: 41 [2019-11-06 22:11:47,717 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:11:47,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-06 22:11:47,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2019-11-06 22:11:47,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-06 22:11:47,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2019-11-06 22:11:47,729 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 52 [2019-11-06 22:11:47,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:47,729 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2019-11-06 22:11:47,730 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 22:11:47,732 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2019-11-06 22:11:47,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-11-06 22:11:47,733 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:47,733 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:11:47,933 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:47,934 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:47,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:47,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1804278027, now seen corresponding path program 4 times [2019-11-06 22:11:47,935 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:47,935 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374315727] [2019-11-06 22:11:47,936 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:47,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:48,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:48,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:48,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:48,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:48,058 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-11-06 22:11:48,058 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374315727] [2019-11-06 22:11:48,059 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343955948] [2019-11-06 22:11:48,059 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 22:11:48,107 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 22:11:48,107 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:11:48,108 INFO L256 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:11:48,119 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:11:48,159 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 28 proven. 4 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-11-06 22:11:48,160 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:11:48,160 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-11-06 22:11:48,160 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225114514] [2019-11-06 22:11:48,161 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 22:11:48,162 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:48,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 22:11:48,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2019-11-06 22:11:48,162 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 11 states. [2019-11-06 22:11:48,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:48,326 INFO L93 Difference]: Finished difference Result 69 states and 81 transitions. [2019-11-06 22:11:48,327 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 22:11:48,327 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 56 [2019-11-06 22:11:48,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:48,328 INFO L225 Difference]: With dead ends: 69 [2019-11-06 22:11:48,328 INFO L226 Difference]: Without dead ends: 45 [2019-11-06 22:11:48,329 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2019-11-06 22:11:48,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-11-06 22:11:48,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2019-11-06 22:11:48,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-11-06 22:11:48,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2019-11-06 22:11:48,340 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 56 [2019-11-06 22:11:48,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:48,341 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2019-11-06 22:11:48,341 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 22:11:48,341 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2019-11-06 22:11:48,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-11-06 22:11:48,342 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:48,342 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:11:48,543 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:48,543 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:48,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:48,544 INFO L82 PathProgramCache]: Analyzing trace with hash -1261247541, now seen corresponding path program 5 times [2019-11-06 22:11:48,544 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:48,545 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634194945] [2019-11-06 22:11:48,545 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:48,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:48,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:48,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:48,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:48,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:48,650 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2019-11-06 22:11:48,650 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634194945] [2019-11-06 22:11:48,651 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212442508] [2019-11-06 22:11:48,651 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:48,750 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2019-11-06 22:11:48,750 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:11:48,751 INFO L256 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-06 22:11:48,753 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:11:48,804 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 52 proven. 9 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2019-11-06 22:11:48,804 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:11:48,804 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 13 [2019-11-06 22:11:48,807 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048609086] [2019-11-06 22:11:48,809 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-06 22:11:48,809 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:48,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-06 22:11:48,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2019-11-06 22:11:48,810 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 13 states. [2019-11-06 22:11:48,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:48,967 INFO L93 Difference]: Finished difference Result 75 states and 87 transitions. [2019-11-06 22:11:48,967 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 22:11:48,967 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 64 [2019-11-06 22:11:48,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:48,968 INFO L225 Difference]: With dead ends: 75 [2019-11-06 22:11:48,968 INFO L226 Difference]: Without dead ends: 49 [2019-11-06 22:11:48,969 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2019-11-06 22:11:48,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-11-06 22:11:48,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2019-11-06 22:11:48,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-11-06 22:11:48,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2019-11-06 22:11:48,975 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 64 [2019-11-06 22:11:48,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:48,976 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2019-11-06 22:11:48,976 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-06 22:11:48,976 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2019-11-06 22:11:48,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-11-06 22:11:48,977 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:48,977 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:11:49,180 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:49,181 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:49,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:49,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1705696395, now seen corresponding path program 6 times [2019-11-06 22:11:49,181 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:49,182 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117966805] [2019-11-06 22:11:49,182 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:49,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:49,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:49,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:49,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:49,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:49,292 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-11-06 22:11:49,292 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117966805] [2019-11-06 22:11:49,292 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271089197] [2019-11-06 22:11:49,292 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:49,358 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-06 22:11:49,358 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:11:49,359 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:11:49,361 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:11:49,405 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 90 proven. 4 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2019-11-06 22:11:49,406 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:11:49,406 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 13 [2019-11-06 22:11:49,406 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266409200] [2019-11-06 22:11:49,409 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-06 22:11:49,409 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:49,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-06 22:11:49,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2019-11-06 22:11:49,410 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 13 states. [2019-11-06 22:11:49,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:49,534 INFO L93 Difference]: Finished difference Result 81 states and 90 transitions. [2019-11-06 22:11:49,534 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 22:11:49,534 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 72 [2019-11-06 22:11:49,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:49,535 INFO L225 Difference]: With dead ends: 81 [2019-11-06 22:11:49,536 INFO L226 Difference]: Without dead ends: 53 [2019-11-06 22:11:49,537 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2019-11-06 22:11:49,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-11-06 22:11:49,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2019-11-06 22:11:49,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-11-06 22:11:49,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2019-11-06 22:11:49,542 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 72 [2019-11-06 22:11:49,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:49,542 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2019-11-06 22:11:49,543 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-06 22:11:49,543 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2019-11-06 22:11:49,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-11-06 22:11:49,544 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:49,544 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 7, 7, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:11:49,747 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:49,747 INFO L410 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:49,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:49,748 INFO L82 PathProgramCache]: Analyzing trace with hash 1060038123, now seen corresponding path program 7 times [2019-11-06 22:11:49,749 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:49,749 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074540439] [2019-11-06 22:11:49,749 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:49,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:49,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:49,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:49,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:49,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:49,861 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2019-11-06 22:11:49,861 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074540439] [2019-11-06 22:11:49,862 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324318178] [2019-11-06 22:11:49,862 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:49,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:49,939 INFO L256 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-06 22:11:49,942 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:11:49,982 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2019-11-06 22:11:49,983 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:11:49,983 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-11-06 22:11:49,983 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651243209] [2019-11-06 22:11:49,984 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 22:11:49,984 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:49,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 22:11:49,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-11-06 22:11:49,985 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 12 states. [2019-11-06 22:11:50,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:50,097 INFO L93 Difference]: Finished difference Result 84 states and 92 transitions. [2019-11-06 22:11:50,097 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 22:11:50,097 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 76 [2019-11-06 22:11:50,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:50,098 INFO L225 Difference]: With dead ends: 84 [2019-11-06 22:11:50,099 INFO L226 Difference]: Without dead ends: 54 [2019-11-06 22:11:50,099 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-11-06 22:11:50,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-06 22:11:50,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2019-11-06 22:11:50,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-11-06 22:11:50,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2019-11-06 22:11:50,105 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 76 [2019-11-06 22:11:50,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:50,105 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2019-11-06 22:11:50,105 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 22:11:50,106 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2019-11-06 22:11:50,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-11-06 22:11:50,107 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:50,107 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 8, 8, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:11:50,310 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:50,311 INFO L410 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:50,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:50,311 INFO L82 PathProgramCache]: Analyzing trace with hash -928942259, now seen corresponding path program 8 times [2019-11-06 22:11:50,311 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:50,312 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585641732] [2019-11-06 22:11:50,312 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:50,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:50,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:50,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:50,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:50,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:50,438 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2019-11-06 22:11:50,439 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585641732] [2019-11-06 22:11:50,439 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136418] [2019-11-06 22:11:50,439 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:50,506 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 22:11:50,506 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:11:50,507 INFO L256 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-06 22:11:50,509 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:11:50,531 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2019-11-06 22:11:50,532 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:11:50,532 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-11-06 22:11:50,532 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222966541] [2019-11-06 22:11:50,533 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-06 22:11:50,533 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:50,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-06 22:11:50,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-11-06 22:11:50,535 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand 13 states. [2019-11-06 22:11:50,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:50,655 INFO L93 Difference]: Finished difference Result 86 states and 94 transitions. [2019-11-06 22:11:50,655 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 22:11:50,655 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 78 [2019-11-06 22:11:50,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:50,656 INFO L225 Difference]: With dead ends: 86 [2019-11-06 22:11:50,656 INFO L226 Difference]: Without dead ends: 56 [2019-11-06 22:11:50,657 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-11-06 22:11:50,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-11-06 22:11:50,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2019-11-06 22:11:50,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-11-06 22:11:50,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2019-11-06 22:11:50,670 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 78 [2019-11-06 22:11:50,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:50,672 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2019-11-06 22:11:50,672 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-06 22:11:50,672 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2019-11-06 22:11:50,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2019-11-06 22:11:50,673 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:50,674 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 9, 9, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:11:50,878 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:50,878 INFO L410 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:50,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:50,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1078642641, now seen corresponding path program 9 times [2019-11-06 22:11:50,879 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:50,879 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523087803] [2019-11-06 22:11:50,880 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:50,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:51,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:51,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:51,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:51,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:51,045 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2019-11-06 22:11:51,046 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523087803] [2019-11-06 22:11:51,046 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245316134] [2019-11-06 22:11:51,046 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:51,110 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-11-06 22:11:51,111 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:11:51,112 INFO L256 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 22:11:51,113 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:11:51,189 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 88 proven. 16 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2019-11-06 22:11:51,190 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:11:51,190 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7] total 18 [2019-11-06 22:11:51,191 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128244718] [2019-11-06 22:11:51,192 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-06 22:11:51,193 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:51,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-06 22:11:51,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2019-11-06 22:11:51,194 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand 18 states. [2019-11-06 22:11:51,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:51,463 INFO L93 Difference]: Finished difference Result 90 states and 102 transitions. [2019-11-06 22:11:51,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-06 22:11:51,463 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 80 [2019-11-06 22:11:51,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:51,464 INFO L225 Difference]: With dead ends: 90 [2019-11-06 22:11:51,464 INFO L226 Difference]: Without dead ends: 60 [2019-11-06 22:11:51,465 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2019-11-06 22:11:51,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-11-06 22:11:51,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2019-11-06 22:11:51,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-11-06 22:11:51,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2019-11-06 22:11:51,471 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 80 [2019-11-06 22:11:51,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:51,472 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2019-11-06 22:11:51,472 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-06 22:11:51,472 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2019-11-06 22:11:51,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-11-06 22:11:51,473 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:51,473 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 10, 10, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:11:51,677 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:51,677 INFO L410 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:51,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:51,678 INFO L82 PathProgramCache]: Analyzing trace with hash 678539503, now seen corresponding path program 10 times [2019-11-06 22:11:51,679 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:51,679 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280141890] [2019-11-06 22:11:51,679 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:51,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:51,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:51,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:51,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:51,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:51,855 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2019-11-06 22:11:51,856 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280141890] [2019-11-06 22:11:51,856 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909158885] [2019-11-06 22:11:51,856 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:51,925 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 22:11:51,926 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:11:51,927 INFO L256 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 22:11:51,929 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:11:51,943 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 124 proven. 25 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked. [2019-11-06 22:11:51,944 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:11:51,944 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2019-11-06 22:11:51,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50342374] [2019-11-06 22:11:51,945 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 22:11:51,945 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:51,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 22:11:51,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:11:51,945 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand 9 states. [2019-11-06 22:11:52,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:52,086 INFO L93 Difference]: Finished difference Result 93 states and 103 transitions. [2019-11-06 22:11:52,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 22:11:52,086 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 88 [2019-11-06 22:11:52,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:52,087 INFO L225 Difference]: With dead ends: 93 [2019-11-06 22:11:52,088 INFO L226 Difference]: Without dead ends: 62 [2019-11-06 22:11:52,088 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2019-11-06 22:11:52,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-11-06 22:11:52,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2019-11-06 22:11:52,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-11-06 22:11:52,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2019-11-06 22:11:52,102 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 88 [2019-11-06 22:11:52,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:52,102 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2019-11-06 22:11:52,102 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 22:11:52,103 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2019-11-06 22:11:52,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-11-06 22:11:52,103 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:52,104 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 10, 10, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:11:52,307 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:52,308 INFO L410 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:52,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:52,308 INFO L82 PathProgramCache]: Analyzing trace with hash 338893517, now seen corresponding path program 11 times [2019-11-06 22:11:52,308 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:52,308 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224006146] [2019-11-06 22:11:52,308 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:52,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:52,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:52,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:52,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:52,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:52,437 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 176 proven. 36 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2019-11-06 22:11:52,438 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224006146] [2019-11-06 22:11:52,438 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286880905] [2019-11-06 22:11:52,438 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:52,754 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2019-11-06 22:11:52,754 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:11:52,756 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-06 22:11:52,758 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:11:52,769 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 172 proven. 36 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2019-11-06 22:11:52,769 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:11:52,769 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2019-11-06 22:11:52,770 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189868158] [2019-11-06 22:11:52,770 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-06 22:11:52,770 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:52,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-06 22:11:52,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-11-06 22:11:52,771 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand 10 states. [2019-11-06 22:11:52,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:52,947 INFO L93 Difference]: Finished difference Result 97 states and 107 transitions. [2019-11-06 22:11:52,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-06 22:11:52,947 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 94 [2019-11-06 22:11:52,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:52,948 INFO L225 Difference]: With dead ends: 97 [2019-11-06 22:11:52,948 INFO L226 Difference]: Without dead ends: 64 [2019-11-06 22:11:52,949 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2019-11-06 22:11:52,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-11-06 22:11:52,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2019-11-06 22:11:52,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-11-06 22:11:52,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 67 transitions. [2019-11-06 22:11:52,955 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 67 transitions. Word has length 94 [2019-11-06 22:11:52,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:52,955 INFO L462 AbstractCegarLoop]: Abstraction has 63 states and 67 transitions. [2019-11-06 22:11:52,955 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-06 22:11:52,955 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 67 transitions. [2019-11-06 22:11:52,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-11-06 22:11:52,956 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:52,956 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 10, 10, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:11:53,161 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:53,161 INFO L410 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:53,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:53,162 INFO L82 PathProgramCache]: Analyzing trace with hash -1202133461, now seen corresponding path program 12 times [2019-11-06 22:11:53,162 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:53,162 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130602691] [2019-11-06 22:11:53,162 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:53,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:53,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:53,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:53,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:53,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:53,294 INFO L134 CoverageAnalysis]: Checked inductivity of 607 backedges. 232 proven. 49 refuted. 0 times theorem prover too weak. 326 trivial. 0 not checked. [2019-11-06 22:11:53,294 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130602691] [2019-11-06 22:11:53,294 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210870781] [2019-11-06 22:11:53,295 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:53,384 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-11-06 22:11:53,384 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:11:53,386 INFO L256 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-06 22:11:53,388 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:11:53,447 INFO L134 CoverageAnalysis]: Checked inductivity of 607 backedges. 234 proven. 9 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2019-11-06 22:11:53,448 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:11:53,448 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 15 [2019-11-06 22:11:53,448 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203578256] [2019-11-06 22:11:53,449 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-06 22:11:53,450 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:53,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-06 22:11:53,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2019-11-06 22:11:53,450 INFO L87 Difference]: Start difference. First operand 63 states and 67 transitions. Second operand 15 states. [2019-11-06 22:11:53,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:53,697 INFO L93 Difference]: Finished difference Result 104 states and 115 transitions. [2019-11-06 22:11:53,698 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-06 22:11:53,698 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 100 [2019-11-06 22:11:53,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:53,699 INFO L225 Difference]: With dead ends: 104 [2019-11-06 22:11:53,699 INFO L226 Difference]: Without dead ends: 69 [2019-11-06 22:11:53,700 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2019-11-06 22:11:53,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-11-06 22:11:53,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2019-11-06 22:11:53,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-11-06 22:11:53,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 71 transitions. [2019-11-06 22:11:53,706 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 71 transitions. Word has length 100 [2019-11-06 22:11:53,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:53,706 INFO L462 AbstractCegarLoop]: Abstraction has 67 states and 71 transitions. [2019-11-06 22:11:53,706 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-06 22:11:53,706 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 71 transitions. [2019-11-06 22:11:53,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2019-11-06 22:11:53,708 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:53,708 INFO L410 BasicCegarLoop]: trace histogram [24, 24, 10, 10, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:11:53,919 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:53,919 INFO L410 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:53,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:53,920 INFO L82 PathProgramCache]: Analyzing trace with hash 1362260743, now seen corresponding path program 13 times [2019-11-06 22:11:53,920 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:53,921 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156444996] [2019-11-06 22:11:53,921 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:53,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:53,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:53,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:53,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:53,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:54,052 INFO L134 CoverageAnalysis]: Checked inductivity of 755 backedges. 296 proven. 64 refuted. 0 times theorem prover too weak. 395 trivial. 0 not checked. [2019-11-06 22:11:54,052 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156444996] [2019-11-06 22:11:54,053 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415351794] [2019-11-06 22:11:54,053 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:54,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:54,139 INFO L256 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-06 22:11:54,141 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:11:54,159 INFO L134 CoverageAnalysis]: Checked inductivity of 755 backedges. 292 proven. 64 refuted. 0 times theorem prover too weak. 399 trivial. 0 not checked. [2019-11-06 22:11:54,159 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:11:54,159 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2019-11-06 22:11:54,160 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503038455] [2019-11-06 22:11:54,160 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 22:11:54,160 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:54,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 22:11:54,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-11-06 22:11:54,161 INFO L87 Difference]: Start difference. First operand 67 states and 71 transitions. Second operand 12 states. [2019-11-06 22:11:54,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:54,376 INFO L93 Difference]: Finished difference Result 109 states and 119 transitions. [2019-11-06 22:11:54,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 22:11:54,377 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 108 [2019-11-06 22:11:54,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:54,378 INFO L225 Difference]: With dead ends: 109 [2019-11-06 22:11:54,378 INFO L226 Difference]: Without dead ends: 70 [2019-11-06 22:11:54,379 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2019-11-06 22:11:54,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-11-06 22:11:54,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2019-11-06 22:11:54,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-11-06 22:11:54,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 73 transitions. [2019-11-06 22:11:54,392 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 73 transitions. Word has length 108 [2019-11-06 22:11:54,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:54,392 INFO L462 AbstractCegarLoop]: Abstraction has 69 states and 73 transitions. [2019-11-06 22:11:54,392 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 22:11:54,392 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 73 transitions. [2019-11-06 22:11:54,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2019-11-06 22:11:54,393 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:54,393 INFO L410 BasicCegarLoop]: trace histogram [27, 27, 10, 10, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:11:54,594 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:54,594 INFO L410 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:54,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:54,595 INFO L82 PathProgramCache]: Analyzing trace with hash 345475557, now seen corresponding path program 14 times [2019-11-06 22:11:54,595 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:54,595 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624977891] [2019-11-06 22:11:54,596 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:54,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:54,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:54,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:54,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:54,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:54,738 INFO L134 CoverageAnalysis]: Checked inductivity of 914 backedges. 184 proven. 265 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2019-11-06 22:11:54,738 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624977891] [2019-11-06 22:11:54,738 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796564934] [2019-11-06 22:11:54,739 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:54,826 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 22:11:54,826 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:11:54,827 INFO L256 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-06 22:11:54,829 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:11:54,844 INFO L134 CoverageAnalysis]: Checked inductivity of 914 backedges. 364 proven. 81 refuted. 0 times theorem prover too weak. 469 trivial. 0 not checked. [2019-11-06 22:11:54,844 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:11:54,844 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2019-11-06 22:11:54,844 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321286057] [2019-11-06 22:11:54,845 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-06 22:11:54,845 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:54,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-06 22:11:54,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-11-06 22:11:54,846 INFO L87 Difference]: Start difference. First operand 69 states and 73 transitions. Second operand 13 states. [2019-11-06 22:11:55,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:55,072 INFO L93 Difference]: Finished difference Result 112 states and 122 transitions. [2019-11-06 22:11:55,072 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 22:11:55,072 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 114 [2019-11-06 22:11:55,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:55,073 INFO L225 Difference]: With dead ends: 112 [2019-11-06 22:11:55,073 INFO L226 Difference]: Without dead ends: 71 [2019-11-06 22:11:55,074 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2019-11-06 22:11:55,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-11-06 22:11:55,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2019-11-06 22:11:55,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-11-06 22:11:55,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2019-11-06 22:11:55,078 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 114 [2019-11-06 22:11:55,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:55,079 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2019-11-06 22:11:55,079 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-06 22:11:55,079 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2019-11-06 22:11:55,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-11-06 22:11:55,080 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:55,080 INFO L410 BasicCegarLoop]: trace histogram [30, 30, 10, 10, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:11:55,284 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:55,284 INFO L410 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:55,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:55,284 INFO L82 PathProgramCache]: Analyzing trace with hash -2122464701, now seen corresponding path program 15 times [2019-11-06 22:11:55,285 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:55,285 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016454982] [2019-11-06 22:11:55,285 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:55,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:55,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:55,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:55,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:55,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:55,379 INFO L134 CoverageAnalysis]: Checked inductivity of 1091 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1075 trivial. 0 not checked. [2019-11-06 22:11:55,379 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016454982] [2019-11-06 22:11:55,380 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046472622] [2019-11-06 22:11:55,380 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:55,464 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-06 22:11:55,465 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:11:55,466 INFO L256 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 22:11:55,468 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:11:55,501 INFO L134 CoverageAnalysis]: Checked inductivity of 1091 backedges. 450 proven. 16 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2019-11-06 22:11:55,501 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:11:55,502 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-11-06 22:11:55,502 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768621452] [2019-11-06 22:11:55,502 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 22:11:55,502 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:55,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 22:11:55,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:11:55,503 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand 9 states. [2019-11-06 22:11:55,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:55,577 INFO L93 Difference]: Finished difference Result 105 states and 110 transitions. [2019-11-06 22:11:55,577 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 22:11:55,577 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 120 [2019-11-06 22:11:55,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:55,578 INFO L225 Difference]: With dead ends: 105 [2019-11-06 22:11:55,578 INFO L226 Difference]: Without dead ends: 74 [2019-11-06 22:11:55,579 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:11:55,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-11-06 22:11:55,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2019-11-06 22:11:55,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-11-06 22:11:55,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2019-11-06 22:11:55,583 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 120 [2019-11-06 22:11:55,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:55,584 INFO L462 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2019-11-06 22:11:55,584 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 22:11:55,584 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2019-11-06 22:11:55,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2019-11-06 22:11:55,585 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:55,586 INFO L410 BasicCegarLoop]: trace histogram [30, 30, 10, 10, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:11:55,789 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:55,790 INFO L410 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:55,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:55,790 INFO L82 PathProgramCache]: Analyzing trace with hash 1227025345, now seen corresponding path program 16 times [2019-11-06 22:11:55,791 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:55,791 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007855092] [2019-11-06 22:11:55,791 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:55,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:55,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:55,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:55,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:55,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:55,907 INFO L134 CoverageAnalysis]: Checked inductivity of 1100 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 1075 trivial. 0 not checked. [2019-11-06 22:11:55,910 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007855092] [2019-11-06 22:11:55,910 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441950238] [2019-11-06 22:11:55,910 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:56,018 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 22:11:56,018 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:11:56,020 INFO L256 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 22:11:56,022 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:11:56,047 INFO L134 CoverageAnalysis]: Checked inductivity of 1100 backedges. 450 proven. 25 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2019-11-06 22:11:56,047 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:11:56,047 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2019-11-06 22:11:56,048 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004408745] [2019-11-06 22:11:56,049 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-06 22:11:56,049 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:56,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-06 22:11:56,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-11-06 22:11:56,049 INFO L87 Difference]: Start difference. First operand 73 states and 77 transitions. Second operand 10 states. [2019-11-06 22:11:56,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:56,137 INFO L93 Difference]: Finished difference Result 107 states and 112 transitions. [2019-11-06 22:11:56,139 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 22:11:56,139 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 122 [2019-11-06 22:11:56,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:56,140 INFO L225 Difference]: With dead ends: 107 [2019-11-06 22:11:56,140 INFO L226 Difference]: Without dead ends: 76 [2019-11-06 22:11:56,140 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-11-06 22:11:56,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-11-06 22:11:56,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2019-11-06 22:11:56,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-11-06 22:11:56,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 79 transitions. [2019-11-06 22:11:56,144 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 79 transitions. Word has length 122 [2019-11-06 22:11:56,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:56,145 INFO L462 AbstractCegarLoop]: Abstraction has 75 states and 79 transitions. [2019-11-06 22:11:56,145 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-06 22:11:56,145 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 79 transitions. [2019-11-06 22:11:56,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-11-06 22:11:56,146 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:56,147 INFO L410 BasicCegarLoop]: trace histogram [30, 30, 10, 10, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:11:56,350 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:56,351 INFO L410 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:56,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:56,352 INFO L82 PathProgramCache]: Analyzing trace with hash -1138512449, now seen corresponding path program 17 times [2019-11-06 22:11:56,352 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:56,352 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408411173] [2019-11-06 22:11:56,352 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:56,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:56,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:56,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:56,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:56,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:56,464 INFO L134 CoverageAnalysis]: Checked inductivity of 1111 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1075 trivial. 0 not checked. [2019-11-06 22:11:56,465 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408411173] [2019-11-06 22:11:56,465 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981554535] [2019-11-06 22:11:56,465 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:57,097 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2019-11-06 22:11:57,097 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:11:57,100 INFO L256 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-06 22:11:57,102 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:11:57,128 INFO L134 CoverageAnalysis]: Checked inductivity of 1111 backedges. 450 proven. 36 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2019-11-06 22:11:57,129 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:11:57,129 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2019-11-06 22:11:57,129 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313090571] [2019-11-06 22:11:57,131 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 22:11:57,131 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:57,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 22:11:57,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-11-06 22:11:57,131 INFO L87 Difference]: Start difference. First operand 75 states and 79 transitions. Second operand 11 states. [2019-11-06 22:11:57,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:57,245 INFO L93 Difference]: Finished difference Result 109 states and 114 transitions. [2019-11-06 22:11:57,245 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-06 22:11:57,245 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 124 [2019-11-06 22:11:57,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:57,247 INFO L225 Difference]: With dead ends: 109 [2019-11-06 22:11:57,247 INFO L226 Difference]: Without dead ends: 78 [2019-11-06 22:11:57,247 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-11-06 22:11:57,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-11-06 22:11:57,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2019-11-06 22:11:57,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-11-06 22:11:57,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2019-11-06 22:11:57,253 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 124 [2019-11-06 22:11:57,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:57,254 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2019-11-06 22:11:57,254 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 22:11:57,254 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2019-11-06 22:11:57,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-11-06 22:11:57,255 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:57,256 INFO L410 BasicCegarLoop]: trace histogram [30, 30, 10, 10, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:11:57,460 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:57,461 INFO L410 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:57,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:57,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1912334397, now seen corresponding path program 18 times [2019-11-06 22:11:57,462 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:57,462 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235840133] [2019-11-06 22:11:57,462 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:57,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:57,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:57,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:57,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:57,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:57,620 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 1075 trivial. 0 not checked. [2019-11-06 22:11:57,621 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235840133] [2019-11-06 22:11:57,621 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783342560] [2019-11-06 22:11:57,621 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:57,967 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2019-11-06 22:11:57,967 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:11:57,971 INFO L256 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-06 22:11:57,973 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:11:58,003 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 450 proven. 49 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2019-11-06 22:11:58,004 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:11:58,004 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-11-06 22:11:58,005 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665023667] [2019-11-06 22:11:58,006 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 22:11:58,006 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:58,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 22:11:58,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-11-06 22:11:58,007 INFO L87 Difference]: Start difference. First operand 77 states and 81 transitions. Second operand 12 states. [2019-11-06 22:11:58,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:58,117 INFO L93 Difference]: Finished difference Result 111 states and 116 transitions. [2019-11-06 22:11:58,119 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 22:11:58,119 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 126 [2019-11-06 22:11:58,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:58,120 INFO L225 Difference]: With dead ends: 111 [2019-11-06 22:11:58,120 INFO L226 Difference]: Without dead ends: 80 [2019-11-06 22:11:58,120 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-11-06 22:11:58,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-11-06 22:11:58,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2019-11-06 22:11:58,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-11-06 22:11:58,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2019-11-06 22:11:58,127 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 126 [2019-11-06 22:11:58,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:58,128 INFO L462 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2019-11-06 22:11:58,128 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 22:11:58,128 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2019-11-06 22:11:58,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2019-11-06 22:11:58,129 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:58,129 INFO L410 BasicCegarLoop]: trace histogram [30, 30, 10, 10, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:11:58,334 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:58,334 INFO L410 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:58,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:58,335 INFO L82 PathProgramCache]: Analyzing trace with hash 313490235, now seen corresponding path program 19 times [2019-11-06 22:11:58,335 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:58,335 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591446091] [2019-11-06 22:11:58,335 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:58,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:58,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:58,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:58,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:58,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:58,475 INFO L134 CoverageAnalysis]: Checked inductivity of 1139 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 1075 trivial. 0 not checked. [2019-11-06 22:11:58,475 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591446091] [2019-11-06 22:11:58,475 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800811423] [2019-11-06 22:11:58,475 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:58,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:58,568 INFO L256 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-06 22:11:58,569 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:11:58,591 INFO L134 CoverageAnalysis]: Checked inductivity of 1139 backedges. 450 proven. 64 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2019-11-06 22:11:58,591 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:11:58,592 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-11-06 22:11:58,592 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116924313] [2019-11-06 22:11:58,592 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-06 22:11:58,593 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:58,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-06 22:11:58,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-11-06 22:11:58,593 INFO L87 Difference]: Start difference. First operand 79 states and 83 transitions. Second operand 13 states. [2019-11-06 22:11:58,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:58,694 INFO L93 Difference]: Finished difference Result 112 states and 117 transitions. [2019-11-06 22:11:58,695 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 22:11:58,695 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 128 [2019-11-06 22:11:58,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:58,696 INFO L225 Difference]: With dead ends: 112 [2019-11-06 22:11:58,696 INFO L226 Difference]: Without dead ends: 81 [2019-11-06 22:11:58,696 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-11-06 22:11:58,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-11-06 22:11:58,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2019-11-06 22:11:58,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-11-06 22:11:58,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 85 transitions. [2019-11-06 22:11:58,701 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 85 transitions. Word has length 128 [2019-11-06 22:11:58,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:58,701 INFO L462 AbstractCegarLoop]: Abstraction has 81 states and 85 transitions. [2019-11-06 22:11:58,701 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-06 22:11:58,701 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 85 transitions. [2019-11-06 22:11:58,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-11-06 22:11:58,702 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:58,702 INFO L410 BasicCegarLoop]: trace histogram [30, 30, 10, 10, 9, 9, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:11:58,905 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:58,906 INFO L410 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:58,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:58,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1422542521, now seen corresponding path program 20 times [2019-11-06 22:11:58,906 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:58,907 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612308965] [2019-11-06 22:11:58,907 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:59,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:12:02,911 WARN L191 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 59 [2019-11-06 22:12:03,223 WARN L191 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 57 [2019-11-06 22:12:03,629 WARN L191 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 49 [2019-11-06 22:12:04,105 WARN L191 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 50 [2019-11-06 22:12:04,568 WARN L191 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 48 [2019-11-06 22:12:11,240 WARN L191 SmtUtils]: Spent 6.48 s on a formula simplification. DAG size of input: 157 DAG size of output: 55 [2019-11-06 22:12:17,798 WARN L191 SmtUtils]: Spent 6.41 s on a formula simplification. DAG size of input: 158 DAG size of output: 53 [2019-11-06 22:12:18,291 WARN L191 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 54 [2019-11-06 22:12:22,910 WARN L191 SmtUtils]: Spent 4.40 s on a formula simplification. DAG size of input: 147 DAG size of output: 52