/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/float-benchs/rlim_exit.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 16:01:34,042 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 16:01:34,044 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 16:01:34,092 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 16:01:34,093 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 16:01:34,098 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 16:01:34,101 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 16:01:34,106 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 16:01:34,110 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 16:01:34,115 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 16:01:34,119 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 16:01:34,121 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 16:01:34,121 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 16:01:34,124 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 16:01:34,126 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 16:01:34,128 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 16:01:34,129 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 16:01:34,132 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 16:01:34,147 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 16:01:34,150 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 16:01:34,151 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 16:01:34,153 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 16:01:34,154 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 16:01:34,155 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 16:01:34,158 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 16:01:34,162 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 16:01:34,163 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 16:01:34,164 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 16:01:34,165 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 16:01:34,166 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 16:01:34,166 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 16:01:34,167 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 16:01:34,168 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 16:01:34,168 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 16:01:34,169 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 16:01:34,170 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 16:01:34,171 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 16:01:34,200 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 16:01:34,201 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 16:01:34,202 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 16:01:34,203 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 16:01:34,203 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 16:01:34,203 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 16:01:34,203 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 16:01:34,204 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 16:01:34,204 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 16:01:34,204 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 16:01:34,204 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 16:01:34,204 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 16:01:34,205 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 16:01:34,205 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 16:01:34,205 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 16:01:34,205 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 16:01:34,206 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 16:01:34,206 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 16:01:34,206 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 16:01:34,206 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 16:01:34,207 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 16:01:34,207 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 16:01:34,207 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 16:01:34,207 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 16:01:34,207 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 16:01:34,208 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 16:01:34,720 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 16:01:34,750 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 16:01:34,754 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 16:01:34,755 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 16:01:34,756 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 16:01:34,760 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/rlim_exit.c [2021-01-06 16:01:34,834 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/ab2184235/aa8085d6307d4307b591324aad86c366/FLAGd239550bc [2021-01-06 16:01:35,413 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 16:01:35,414 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/float-benchs/rlim_exit.c [2021-01-06 16:01:35,421 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/ab2184235/aa8085d6307d4307b591324aad86c366/FLAGd239550bc [2021-01-06 16:01:35,790 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/ab2184235/aa8085d6307d4307b591324aad86c366 [2021-01-06 16:01:35,793 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 16:01:35,796 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 16:01:35,801 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 16:01:35,801 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 16:01:35,806 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 16:01:35,806 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:01:35" (1/1) ... [2021-01-06 16:01:35,809 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68fe0d37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:01:35, skipping insertion in model container [2021-01-06 16:01:35,809 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:01:35" (1/1) ... [2021-01-06 16:01:35,818 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 16:01:35,835 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 16:01:35,981 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/float-benchs/rlim_exit.c[446,459] left hand side expression in assignment: lhs: VariableLHS[~Y~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~X~0,] left hand side expression in assignment: lhs: VariableLHS[~D~0,] left hand side expression in assignment: lhs: VariableLHS[~S~0,] left hand side expression in assignment: lhs: VariableLHS[~Y~0,] left hand side expression in assignment: lhs: VariableLHS[~R~0,] left hand side expression in assignment: lhs: VariableLHS[~Y~0,] left hand side expression in assignment: lhs: VariableLHS[~Y~0,] [2021-01-06 16:01:36,009 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:01:36,020 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 16:01:36,035 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/float-benchs/rlim_exit.c[446,459] left hand side expression in assignment: lhs: VariableLHS[~Y~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~X~0,] left hand side expression in assignment: lhs: VariableLHS[~D~0,] left hand side expression in assignment: lhs: VariableLHS[~S~0,] left hand side expression in assignment: lhs: VariableLHS[~Y~0,] left hand side expression in assignment: lhs: VariableLHS[~R~0,] left hand side expression in assignment: lhs: VariableLHS[~Y~0,] left hand side expression in assignment: lhs: VariableLHS[~Y~0,] [2021-01-06 16:01:36,041 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:01:36,058 INFO L208 MainTranslator]: Completed translation [2021-01-06 16:01:36,059 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:01:36 WrapperNode [2021-01-06 16:01:36,059 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 16:01:36,060 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 16:01:36,061 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 16:01:36,061 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 16:01:36,070 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:01:36" (1/1) ... [2021-01-06 16:01:36,079 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:01:36" (1/1) ... [2021-01-06 16:01:36,101 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 16:01:36,102 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 16:01:36,102 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 16:01:36,102 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 16:01:36,111 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:01:36" (1/1) ... [2021-01-06 16:01:36,112 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:01:36" (1/1) ... [2021-01-06 16:01:36,113 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:01:36" (1/1) ... [2021-01-06 16:01:36,114 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:01:36" (1/1) ... [2021-01-06 16:01:36,119 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:01:36" (1/1) ... [2021-01-06 16:01:36,123 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:01:36" (1/1) ... [2021-01-06 16:01:36,125 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:01:36" (1/1) ... [2021-01-06 16:01:36,127 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 16:01:36,128 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 16:01:36,128 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 16:01:36,128 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 16:01:36,129 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:01:36" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 16:01:36,239 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 16:01:36,239 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 16:01:36,239 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 16:01:36,240 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 16:01:36,533 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 16:01:36,533 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-01-06 16:01:36,535 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:01:36 BoogieIcfgContainer [2021-01-06 16:01:36,535 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 16:01:36,537 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 16:01:36,537 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 16:01:36,541 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 16:01:36,541 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 04:01:35" (1/3) ... [2021-01-06 16:01:36,542 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a1548a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:01:36, skipping insertion in model container [2021-01-06 16:01:36,543 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:01:36" (2/3) ... [2021-01-06 16:01:36,543 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a1548a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:01:36, skipping insertion in model container [2021-01-06 16:01:36,546 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:01:36" (3/3) ... [2021-01-06 16:01:36,548 INFO L111 eAbstractionObserver]: Analyzing ICFG rlim_exit.c [2021-01-06 16:01:36,556 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 16:01:36,562 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 16:01:36,612 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 16:01:36,644 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 16:01:36,644 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 16:01:36,644 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 16:01:36,644 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 16:01:36,645 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 16:01:36,645 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 16:01:36,645 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 16:01:36,645 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 16:01:36,691 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2021-01-06 16:01:36,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-01-06 16:01:36,697 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:36,698 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-01-06 16:01:36,698 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:36,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:36,711 INFO L82 PathProgramCache]: Analyzing trace with hash 890522599, now seen corresponding path program 1 times [2021-01-06 16:01:36,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:36,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327806006] [2021-01-06 16:01:36,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:36,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:36,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:36,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327806006] [2021-01-06 16:01:36,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:01:36,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 16:01:36,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714888598] [2021-01-06 16:01:36,938 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 16:01:36,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:01:36,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 16:01:36,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 16:01:36,966 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 2 states. [2021-01-06 16:01:36,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:01:36,986 INFO L93 Difference]: Finished difference Result 34 states and 46 transitions. [2021-01-06 16:01:36,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 16:01:36,988 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2021-01-06 16:01:36,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:01:37,009 INFO L225 Difference]: With dead ends: 34 [2021-01-06 16:01:37,009 INFO L226 Difference]: Without dead ends: 14 [2021-01-06 16:01:37,013 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 16:01:37,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-01-06 16:01:37,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-01-06 16:01:37,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-01-06 16:01:37,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2021-01-06 16:01:37,070 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 6 [2021-01-06 16:01:37,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:01:37,071 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2021-01-06 16:01:37,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 16:01:37,071 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2021-01-06 16:01:37,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-01-06 16:01:37,072 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:37,072 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-01-06 16:01:37,073 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 16:01:37,074 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:37,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:37,078 INFO L82 PathProgramCache]: Analyzing trace with hash 889628869, now seen corresponding path program 1 times [2021-01-06 16:01:37,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:37,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876690946] [2021-01-06 16:01:37,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:37,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:37,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:37,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876690946] [2021-01-06 16:01:37,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:01:37,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 16:01:37,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232578541] [2021-01-06 16:01:37,160 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 16:01:37,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:01:37,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 16:01:37,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 16:01:37,162 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 3 states. [2021-01-06 16:01:37,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:01:37,187 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2021-01-06 16:01:37,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 16:01:37,188 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2021-01-06 16:01:37,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:01:37,189 INFO L225 Difference]: With dead ends: 26 [2021-01-06 16:01:37,191 INFO L226 Difference]: Without dead ends: 22 [2021-01-06 16:01:37,192 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 16:01:37,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-01-06 16:01:37,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 15. [2021-01-06 16:01:37,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-01-06 16:01:37,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2021-01-06 16:01:37,200 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 6 [2021-01-06 16:01:37,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:01:37,201 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2021-01-06 16:01:37,201 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 16:01:37,202 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2021-01-06 16:01:37,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 16:01:37,202 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:37,202 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:37,203 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 16:01:37,204 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:37,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:37,205 INFO L82 PathProgramCache]: Analyzing trace with hash -32842122, now seen corresponding path program 1 times [2021-01-06 16:01:37,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:37,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815437567] [2021-01-06 16:01:37,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:37,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:37,324 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:37,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815437567] [2021-01-06 16:01:37,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010608206] [2021-01-06 16:01:37,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:01:37,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:37,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 16:01:37,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:01:37,499 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:37,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:01:37,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 16:01:37,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207675262] [2021-01-06 16:01:37,501 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 16:01:37,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:01:37,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 16:01:37,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 16:01:37,503 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 5 states. [2021-01-06 16:01:37,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:01:37,537 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2021-01-06 16:01:37,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 16:01:37,538 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2021-01-06 16:01:37,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:01:37,539 INFO L225 Difference]: With dead ends: 34 [2021-01-06 16:01:37,539 INFO L226 Difference]: Without dead ends: 30 [2021-01-06 16:01:37,540 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 16:01:37,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-01-06 16:01:37,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 23. [2021-01-06 16:01:37,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-01-06 16:01:37,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-01-06 16:01:37,545 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 13 [2021-01-06 16:01:37,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:01:37,546 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-01-06 16:01:37,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 16:01:37,546 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-01-06 16:01:37,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 16:01:37,547 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:37,547 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:37,761 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-01-06 16:01:37,762 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:37,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:37,763 INFO L82 PathProgramCache]: Analyzing trace with hash 964759461, now seen corresponding path program 2 times [2021-01-06 16:01:37,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:37,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324201461] [2021-01-06 16:01:37,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:37,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:37,909 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:37,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324201461] [2021-01-06 16:01:37,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189025790] [2021-01-06 16:01:37,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:01:38,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:01:38,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:01:38,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 16:01:38,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:01:38,101 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:38,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:01:38,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-01-06 16:01:38,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099763799] [2021-01-06 16:01:38,103 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 16:01:38,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:01:38,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 16:01:38,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 16:01:38,105 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 6 states. [2021-01-06 16:01:38,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:01:38,139 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2021-01-06 16:01:38,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 16:01:38,140 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2021-01-06 16:01:38,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:01:38,142 INFO L225 Difference]: With dead ends: 42 [2021-01-06 16:01:38,142 INFO L226 Difference]: Without dead ends: 38 [2021-01-06 16:01:38,142 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 16:01:38,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-01-06 16:01:38,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2021-01-06 16:01:38,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-01-06 16:01:38,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2021-01-06 16:01:38,149 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 20 [2021-01-06 16:01:38,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:01:38,150 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2021-01-06 16:01:38,150 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 16:01:38,150 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2021-01-06 16:01:38,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-01-06 16:01:38,151 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:38,151 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:38,364 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:01:38,365 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:38,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:38,365 INFO L82 PathProgramCache]: Analyzing trace with hash 2033777558, now seen corresponding path program 3 times [2021-01-06 16:01:38,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:38,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560749100] [2021-01-06 16:01:38,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:38,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:38,487 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:38,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560749100] [2021-01-06 16:01:38,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846803336] [2021-01-06 16:01:38,488 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:01:38,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 16:01:38,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:01:38,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 16:01:38,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:01:38,666 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:38,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:01:38,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-01-06 16:01:38,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543455453] [2021-01-06 16:01:38,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 16:01:38,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:01:38,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 16:01:38,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 16:01:38,670 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand 7 states. [2021-01-06 16:01:38,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:01:38,725 INFO L93 Difference]: Finished difference Result 50 states and 60 transitions. [2021-01-06 16:01:38,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 16:01:38,726 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2021-01-06 16:01:38,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:01:38,728 INFO L225 Difference]: With dead ends: 50 [2021-01-06 16:01:38,728 INFO L226 Difference]: Without dead ends: 46 [2021-01-06 16:01:38,729 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 16:01:38,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-01-06 16:01:38,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 39. [2021-01-06 16:01:38,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-01-06 16:01:38,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2021-01-06 16:01:38,735 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 27 [2021-01-06 16:01:38,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:01:38,735 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2021-01-06 16:01:38,735 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 16:01:38,735 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2021-01-06 16:01:38,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-01-06 16:01:38,737 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:38,737 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:38,951 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:01:38,952 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:38,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:38,953 INFO L82 PathProgramCache]: Analyzing trace with hash -322048379, now seen corresponding path program 4 times [2021-01-06 16:01:38,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:38,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054917801] [2021-01-06 16:01:38,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:38,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:39,091 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:39,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054917801] [2021-01-06 16:01:39,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994943324] [2021-01-06 16:01:39,092 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:01:39,196 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:01:39,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:01:39,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 16:01:39,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:01:39,298 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:39,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:01:39,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-01-06 16:01:39,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518911293] [2021-01-06 16:01:39,300 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 16:01:39,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:01:39,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 16:01:39,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 16:01:39,303 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand 8 states. [2021-01-06 16:01:39,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:01:39,373 INFO L93 Difference]: Finished difference Result 58 states and 70 transitions. [2021-01-06 16:01:39,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 16:01:39,374 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 34 [2021-01-06 16:01:39,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:01:39,378 INFO L225 Difference]: With dead ends: 58 [2021-01-06 16:01:39,378 INFO L226 Difference]: Without dead ends: 54 [2021-01-06 16:01:39,379 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 16:01:39,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-01-06 16:01:39,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 47. [2021-01-06 16:01:39,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2021-01-06 16:01:39,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 57 transitions. [2021-01-06 16:01:39,394 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 57 transitions. Word has length 34 [2021-01-06 16:01:39,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:01:39,397 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 57 transitions. [2021-01-06 16:01:39,397 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 16:01:39,398 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 57 transitions. [2021-01-06 16:01:39,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-01-06 16:01:39,399 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:39,399 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:39,599 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:01:39,600 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:39,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:39,602 INFO L82 PathProgramCache]: Analyzing trace with hash -497180490, now seen corresponding path program 5 times [2021-01-06 16:01:39,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:39,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386630902] [2021-01-06 16:01:39,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:39,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:39,755 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:39,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386630902] [2021-01-06 16:01:39,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826718998] [2021-01-06 16:01:39,758 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:01:39,832 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-01-06 16:01:39,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:01:39,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 16:01:39,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:01:39,955 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:39,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:01:39,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-01-06 16:01:39,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547563724] [2021-01-06 16:01:39,959 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 16:01:39,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:01:39,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 16:01:39,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 16:01:39,965 INFO L87 Difference]: Start difference. First operand 47 states and 57 transitions. Second operand 9 states. [2021-01-06 16:01:40,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:01:40,008 INFO L93 Difference]: Finished difference Result 66 states and 80 transitions. [2021-01-06 16:01:40,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 16:01:40,009 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 41 [2021-01-06 16:01:40,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:01:40,012 INFO L225 Difference]: With dead ends: 66 [2021-01-06 16:01:40,012 INFO L226 Difference]: Without dead ends: 62 [2021-01-06 16:01:40,013 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 16:01:40,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-01-06 16:01:40,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 55. [2021-01-06 16:01:40,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2021-01-06 16:01:40,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 67 transitions. [2021-01-06 16:01:40,030 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 67 transitions. Word has length 41 [2021-01-06 16:01:40,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:01:40,032 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 67 transitions. [2021-01-06 16:01:40,032 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 16:01:40,032 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 67 transitions. [2021-01-06 16:01:40,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-06 16:01:40,036 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:40,036 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:40,252 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-01-06 16:01:40,253 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:40,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:40,254 INFO L82 PathProgramCache]: Analyzing trace with hash -784644763, now seen corresponding path program 6 times [2021-01-06 16:01:40,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:40,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342948202] [2021-01-06 16:01:40,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:40,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:40,453 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:40,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342948202] [2021-01-06 16:01:40,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602110183] [2021-01-06 16:01:40,456 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:01:40,556 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-01-06 16:01:40,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:01:40,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 16:01:40,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:01:40,654 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:40,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:01:40,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-01-06 16:01:40,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287685281] [2021-01-06 16:01:40,656 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 16:01:40,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:01:40,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 16:01:40,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 16:01:40,657 INFO L87 Difference]: Start difference. First operand 55 states and 67 transitions. Second operand 10 states. [2021-01-06 16:01:40,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:01:40,693 INFO L93 Difference]: Finished difference Result 74 states and 90 transitions. [2021-01-06 16:01:40,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 16:01:40,694 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 48 [2021-01-06 16:01:40,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:01:40,695 INFO L225 Difference]: With dead ends: 74 [2021-01-06 16:01:40,695 INFO L226 Difference]: Without dead ends: 70 [2021-01-06 16:01:40,696 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 16:01:40,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-01-06 16:01:40,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 63. [2021-01-06 16:01:40,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2021-01-06 16:01:40,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 77 transitions. [2021-01-06 16:01:40,700 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 77 transitions. Word has length 48 [2021-01-06 16:01:40,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:01:40,701 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 77 transitions. [2021-01-06 16:01:40,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 16:01:40,701 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 77 transitions. [2021-01-06 16:01:40,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-01-06 16:01:40,702 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:40,702 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:40,916 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:01:40,917 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:40,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:40,918 INFO L82 PathProgramCache]: Analyzing trace with hash 594202070, now seen corresponding path program 7 times [2021-01-06 16:01:40,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:40,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976302727] [2021-01-06 16:01:40,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:40,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:41,039 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:41,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976302727] [2021-01-06 16:01:41,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177856380] [2021-01-06 16:01:41,040 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:01:41,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:41,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 16:01:41,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:01:41,201 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:41,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:01:41,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-01-06 16:01:41,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763719812] [2021-01-06 16:01:41,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 16:01:41,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:01:41,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 16:01:41,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 16:01:41,204 INFO L87 Difference]: Start difference. First operand 63 states and 77 transitions. Second operand 11 states. [2021-01-06 16:01:41,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:01:41,249 INFO L93 Difference]: Finished difference Result 82 states and 100 transitions. [2021-01-06 16:01:41,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 16:01:41,250 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 55 [2021-01-06 16:01:41,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:01:41,251 INFO L225 Difference]: With dead ends: 82 [2021-01-06 16:01:41,251 INFO L226 Difference]: Without dead ends: 78 [2021-01-06 16:01:41,251 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 16:01:41,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-01-06 16:01:41,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 71. [2021-01-06 16:01:41,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2021-01-06 16:01:41,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 87 transitions. [2021-01-06 16:01:41,257 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 87 transitions. Word has length 55 [2021-01-06 16:01:41,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:01:41,257 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 87 transitions. [2021-01-06 16:01:41,257 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 16:01:41,257 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 87 transitions. [2021-01-06 16:01:41,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-01-06 16:01:41,258 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:41,258 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:41,471 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:01:41,472 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:41,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:41,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1217860677, now seen corresponding path program 8 times [2021-01-06 16:01:41,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:41,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056143583] [2021-01-06 16:01:41,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:41,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:41,668 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 204 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:41,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056143583] [2021-01-06 16:01:41,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682360202] [2021-01-06 16:01:41,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:01:41,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:01:41,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:01:41,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 16:01:41,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:01:41,843 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 204 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:41,843 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:01:41,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-01-06 16:01:41,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246909364] [2021-01-06 16:01:41,844 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 16:01:41,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:01:41,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 16:01:41,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 16:01:41,845 INFO L87 Difference]: Start difference. First operand 71 states and 87 transitions. Second operand 12 states. [2021-01-06 16:01:41,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:01:41,887 INFO L93 Difference]: Finished difference Result 90 states and 110 transitions. [2021-01-06 16:01:41,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 16:01:41,888 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 62 [2021-01-06 16:01:41,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:01:41,889 INFO L225 Difference]: With dead ends: 90 [2021-01-06 16:01:41,889 INFO L226 Difference]: Without dead ends: 86 [2021-01-06 16:01:41,890 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 16:01:41,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-01-06 16:01:41,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 79. [2021-01-06 16:01:41,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2021-01-06 16:01:41,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 97 transitions. [2021-01-06 16:01:41,895 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 97 transitions. Word has length 62 [2021-01-06 16:01:41,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:01:41,895 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 97 transitions. [2021-01-06 16:01:41,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 16:01:41,896 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 97 transitions. [2021-01-06 16:01:41,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-01-06 16:01:41,897 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:41,897 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:42,110 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-01-06 16:01:42,111 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:42,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:42,112 INFO L82 PathProgramCache]: Analyzing trace with hash -690846986, now seen corresponding path program 9 times [2021-01-06 16:01:42,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:42,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718574365] [2021-01-06 16:01:42,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:42,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:42,276 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 0 proven. 261 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:42,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718574365] [2021-01-06 16:01:42,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089081581] [2021-01-06 16:01:42,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:01:42,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-01-06 16:01:42,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:01:42,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 16:01:42,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:01:42,512 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 0 proven. 261 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:42,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:01:42,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-01-06 16:01:42,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186248451] [2021-01-06 16:01:42,514 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 16:01:42,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:01:42,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 16:01:42,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 16:01:42,515 INFO L87 Difference]: Start difference. First operand 79 states and 97 transitions. Second operand 13 states. [2021-01-06 16:01:42,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:01:42,560 INFO L93 Difference]: Finished difference Result 98 states and 120 transitions. [2021-01-06 16:01:42,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 16:01:42,561 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 69 [2021-01-06 16:01:42,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:01:42,562 INFO L225 Difference]: With dead ends: 98 [2021-01-06 16:01:42,562 INFO L226 Difference]: Without dead ends: 94 [2021-01-06 16:01:42,563 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 16:01:42,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-01-06 16:01:42,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 87. [2021-01-06 16:01:42,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2021-01-06 16:01:42,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 107 transitions. [2021-01-06 16:01:42,567 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 107 transitions. Word has length 69 [2021-01-06 16:01:42,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:01:42,568 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 107 transitions. [2021-01-06 16:01:42,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 16:01:42,568 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 107 transitions. [2021-01-06 16:01:42,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-01-06 16:01:42,569 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:42,569 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:42,783 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:01:42,784 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:42,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:42,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1949260581, now seen corresponding path program 10 times [2021-01-06 16:01:42,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:42,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533704005] [2021-01-06 16:01:42,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:42,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:42,952 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:42,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533704005] [2021-01-06 16:01:42,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119843653] [2021-01-06 16:01:42,953 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:01:43,052 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:01:43,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:01:43,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 16:01:43,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:01:43,153 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:43,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:01:43,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-01-06 16:01:43,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562057466] [2021-01-06 16:01:43,154 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 16:01:43,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:01:43,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 16:01:43,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-01-06 16:01:43,155 INFO L87 Difference]: Start difference. First operand 87 states and 107 transitions. Second operand 14 states. [2021-01-06 16:01:43,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:01:43,208 INFO L93 Difference]: Finished difference Result 106 states and 130 transitions. [2021-01-06 16:01:43,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 16:01:43,208 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 76 [2021-01-06 16:01:43,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:01:43,209 INFO L225 Difference]: With dead ends: 106 [2021-01-06 16:01:43,210 INFO L226 Difference]: Without dead ends: 102 [2021-01-06 16:01:43,210 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-01-06 16:01:43,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-01-06 16:01:43,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 95. [2021-01-06 16:01:43,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2021-01-06 16:01:43,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 117 transitions. [2021-01-06 16:01:43,214 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 117 transitions. Word has length 76 [2021-01-06 16:01:43,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:01:43,215 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 117 transitions. [2021-01-06 16:01:43,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 16:01:43,215 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 117 transitions. [2021-01-06 16:01:43,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-01-06 16:01:43,216 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:43,216 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:43,431 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:01:43,432 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:43,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:43,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1736884246, now seen corresponding path program 11 times [2021-01-06 16:01:43,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:43,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005143567] [2021-01-06 16:01:43,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:43,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:43,631 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:43,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005143567] [2021-01-06 16:01:43,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543375599] [2021-01-06 16:01:43,632 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:01:43,747 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-01-06 16:01:43,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:01:43,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 16:01:43,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:01:43,872 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:43,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:01:43,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-01-06 16:01:43,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070217950] [2021-01-06 16:01:43,876 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 16:01:43,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:01:43,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 16:01:43,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-01-06 16:01:43,878 INFO L87 Difference]: Start difference. First operand 95 states and 117 transitions. Second operand 15 states. [2021-01-06 16:01:43,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:01:43,938 INFO L93 Difference]: Finished difference Result 114 states and 140 transitions. [2021-01-06 16:01:43,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 16:01:43,938 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 83 [2021-01-06 16:01:43,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:01:43,939 INFO L225 Difference]: With dead ends: 114 [2021-01-06 16:01:43,939 INFO L226 Difference]: Without dead ends: 110 [2021-01-06 16:01:43,940 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-01-06 16:01:43,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-01-06 16:01:43,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 103. [2021-01-06 16:01:43,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2021-01-06 16:01:43,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 127 transitions. [2021-01-06 16:01:43,947 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 127 transitions. Word has length 83 [2021-01-06 16:01:43,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:01:43,948 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 127 transitions. [2021-01-06 16:01:43,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 16:01:43,948 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 127 transitions. [2021-01-06 16:01:43,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-01-06 16:01:43,960 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:43,960 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:44,177 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 16:01:44,178 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:44,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:44,179 INFO L82 PathProgramCache]: Analyzing trace with hash 349313541, now seen corresponding path program 12 times [2021-01-06 16:01:44,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:44,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759403180] [2021-01-06 16:01:44,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:44,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:44,431 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 0 proven. 474 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:44,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759403180] [2021-01-06 16:01:44,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608858943] [2021-01-06 16:01:44,432 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:01:44,558 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-01-06 16:01:44,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:01:44,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 16:01:44,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:01:44,667 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 0 proven. 474 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:44,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:01:44,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-01-06 16:01:44,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586508273] [2021-01-06 16:01:44,669 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 16:01:44,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:01:44,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 16:01:44,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-01-06 16:01:44,670 INFO L87 Difference]: Start difference. First operand 103 states and 127 transitions. Second operand 16 states. [2021-01-06 16:01:44,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:01:44,725 INFO L93 Difference]: Finished difference Result 122 states and 150 transitions. [2021-01-06 16:01:44,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 16:01:44,726 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 90 [2021-01-06 16:01:44,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:01:44,727 INFO L225 Difference]: With dead ends: 122 [2021-01-06 16:01:44,727 INFO L226 Difference]: Without dead ends: 118 [2021-01-06 16:01:44,727 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-01-06 16:01:44,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-01-06 16:01:44,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 111. [2021-01-06 16:01:44,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2021-01-06 16:01:44,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 137 transitions. [2021-01-06 16:01:44,731 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 137 transitions. Word has length 90 [2021-01-06 16:01:44,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:01:44,732 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 137 transitions. [2021-01-06 16:01:44,732 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 16:01:44,732 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 137 transitions. [2021-01-06 16:01:44,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-01-06 16:01:44,733 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:44,733 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:44,944 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 16:01:44,945 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:44,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:44,946 INFO L82 PathProgramCache]: Analyzing trace with hash 821658934, now seen corresponding path program 13 times [2021-01-06 16:01:44,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:44,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802292887] [2021-01-06 16:01:44,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:44,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:45,168 INFO L134 CoverageAnalysis]: Checked inductivity of 559 backedges. 0 proven. 559 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:45,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802292887] [2021-01-06 16:01:45,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631187267] [2021-01-06 16:01:45,169 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:01:45,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:45,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 16:01:45,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:01:45,400 INFO L134 CoverageAnalysis]: Checked inductivity of 559 backedges. 0 proven. 559 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:45,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:01:45,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-01-06 16:01:45,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338231509] [2021-01-06 16:01:45,401 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 16:01:45,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:01:45,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 16:01:45,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-01-06 16:01:45,402 INFO L87 Difference]: Start difference. First operand 111 states and 137 transitions. Second operand 17 states. [2021-01-06 16:01:45,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:01:45,468 INFO L93 Difference]: Finished difference Result 130 states and 160 transitions. [2021-01-06 16:01:45,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 16:01:45,469 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 97 [2021-01-06 16:01:45,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:01:45,470 INFO L225 Difference]: With dead ends: 130 [2021-01-06 16:01:45,470 INFO L226 Difference]: Without dead ends: 126 [2021-01-06 16:01:45,470 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-01-06 16:01:45,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-01-06 16:01:45,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 119. [2021-01-06 16:01:45,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2021-01-06 16:01:45,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 147 transitions. [2021-01-06 16:01:45,475 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 147 transitions. Word has length 97 [2021-01-06 16:01:45,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:01:45,475 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 147 transitions. [2021-01-06 16:01:45,475 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 16:01:45,475 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 147 transitions. [2021-01-06 16:01:45,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-01-06 16:01:45,476 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:45,476 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:45,692 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-01-06 16:01:45,693 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:45,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:45,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1791840485, now seen corresponding path program 14 times [2021-01-06 16:01:45,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:45,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146244037] [2021-01-06 16:01:45,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:45,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:45,910 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:45,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146244037] [2021-01-06 16:01:45,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921077858] [2021-01-06 16:01:45,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:01:46,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:01:46,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:01:46,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 16:01:46,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:01:46,179 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:46,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:01:46,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-01-06 16:01:46,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481254716] [2021-01-06 16:01:46,181 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 16:01:46,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:01:46,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 16:01:46,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-01-06 16:01:46,182 INFO L87 Difference]: Start difference. First operand 119 states and 147 transitions. Second operand 18 states. [2021-01-06 16:01:46,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:01:46,256 INFO L93 Difference]: Finished difference Result 138 states and 170 transitions. [2021-01-06 16:01:46,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 16:01:46,256 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 104 [2021-01-06 16:01:46,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:01:46,257 INFO L225 Difference]: With dead ends: 138 [2021-01-06 16:01:46,258 INFO L226 Difference]: Without dead ends: 134 [2021-01-06 16:01:46,258 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-01-06 16:01:46,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-01-06 16:01:46,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 127. [2021-01-06 16:01:46,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2021-01-06 16:01:46,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 157 transitions. [2021-01-06 16:01:46,263 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 157 transitions. Word has length 104 [2021-01-06 16:01:46,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:01:46,263 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 157 transitions. [2021-01-06 16:01:46,263 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 16:01:46,264 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 157 transitions. [2021-01-06 16:01:46,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-01-06 16:01:46,265 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:46,265 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:46,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:01:46,480 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:46,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:46,480 INFO L82 PathProgramCache]: Analyzing trace with hash -1625501098, now seen corresponding path program 15 times [2021-01-06 16:01:46,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:46,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868790302] [2021-01-06 16:01:46,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:46,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:46,762 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 0 proven. 750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:46,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868790302] [2021-01-06 16:01:46,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775297309] [2021-01-06 16:01:46,763 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:01:46,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-01-06 16:01:46,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:01:46,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 16:01:46,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:01:47,124 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 0 proven. 750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:47,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:01:47,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-01-06 16:01:47,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864255806] [2021-01-06 16:01:47,126 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 16:01:47,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:01:47,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 16:01:47,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-01-06 16:01:47,127 INFO L87 Difference]: Start difference. First operand 127 states and 157 transitions. Second operand 19 states. [2021-01-06 16:01:47,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:01:47,204 INFO L93 Difference]: Finished difference Result 146 states and 180 transitions. [2021-01-06 16:01:47,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 16:01:47,205 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 111 [2021-01-06 16:01:47,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:01:47,206 INFO L225 Difference]: With dead ends: 146 [2021-01-06 16:01:47,207 INFO L226 Difference]: Without dead ends: 142 [2021-01-06 16:01:47,207 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-01-06 16:01:47,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-01-06 16:01:47,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 135. [2021-01-06 16:01:47,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2021-01-06 16:01:47,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 167 transitions. [2021-01-06 16:01:47,212 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 167 transitions. Word has length 111 [2021-01-06 16:01:47,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:01:47,212 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 167 transitions. [2021-01-06 16:01:47,212 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 16:01:47,212 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 167 transitions. [2021-01-06 16:01:47,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-01-06 16:01:47,213 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:47,214 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:47,427 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 16:01:47,428 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:47,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:47,428 INFO L82 PathProgramCache]: Analyzing trace with hash 367984581, now seen corresponding path program 16 times [2021-01-06 16:01:47,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:47,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092203170] [2021-01-06 16:01:47,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:47,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:47,747 INFO L134 CoverageAnalysis]: Checked inductivity of 856 backedges. 0 proven. 856 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:47,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092203170] [2021-01-06 16:01:47,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212357227] [2021-01-06 16:01:47,748 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:01:47,879 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:01:47,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:01:47,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 16:01:47,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:01:48,050 INFO L134 CoverageAnalysis]: Checked inductivity of 856 backedges. 0 proven. 856 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:48,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:01:48,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-01-06 16:01:48,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902110750] [2021-01-06 16:01:48,051 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 16:01:48,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:01:48,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 16:01:48,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-01-06 16:01:48,052 INFO L87 Difference]: Start difference. First operand 135 states and 167 transitions. Second operand 20 states. [2021-01-06 16:01:48,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:01:48,136 INFO L93 Difference]: Finished difference Result 154 states and 190 transitions. [2021-01-06 16:01:48,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 16:01:48,137 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 118 [2021-01-06 16:01:48,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:01:48,138 INFO L225 Difference]: With dead ends: 154 [2021-01-06 16:01:48,138 INFO L226 Difference]: Without dead ends: 150 [2021-01-06 16:01:48,139 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-01-06 16:01:48,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-01-06 16:01:48,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 143. [2021-01-06 16:01:48,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2021-01-06 16:01:48,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 177 transitions. [2021-01-06 16:01:48,143 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 177 transitions. Word has length 118 [2021-01-06 16:01:48,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:01:48,144 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 177 transitions. [2021-01-06 16:01:48,144 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 16:01:48,144 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 177 transitions. [2021-01-06 16:01:48,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-01-06 16:01:48,145 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:48,146 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:48,354 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-06 16:01:48,355 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:48,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:48,356 INFO L82 PathProgramCache]: Analyzing trace with hash 1315088246, now seen corresponding path program 17 times [2021-01-06 16:01:48,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:48,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510929620] [2021-01-06 16:01:48,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:48,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:48,653 INFO L134 CoverageAnalysis]: Checked inductivity of 969 backedges. 0 proven. 969 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:48,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510929620] [2021-01-06 16:01:48,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184578479] [2021-01-06 16:01:48,654 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:01:48,821 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-01-06 16:01:48,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:01:48,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 16:01:48,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:01:48,974 INFO L134 CoverageAnalysis]: Checked inductivity of 969 backedges. 0 proven. 969 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:48,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:01:48,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-01-06 16:01:48,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907870510] [2021-01-06 16:01:48,975 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 16:01:48,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:01:48,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 16:01:48,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-01-06 16:01:48,976 INFO L87 Difference]: Start difference. First operand 143 states and 177 transitions. Second operand 21 states. [2021-01-06 16:01:49,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:01:49,055 INFO L93 Difference]: Finished difference Result 162 states and 200 transitions. [2021-01-06 16:01:49,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 16:01:49,055 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 125 [2021-01-06 16:01:49,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:01:49,056 INFO L225 Difference]: With dead ends: 162 [2021-01-06 16:01:49,057 INFO L226 Difference]: Without dead ends: 158 [2021-01-06 16:01:49,057 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-01-06 16:01:49,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-01-06 16:01:49,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 151. [2021-01-06 16:01:49,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2021-01-06 16:01:49,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 187 transitions. [2021-01-06 16:01:49,061 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 187 transitions. Word has length 125 [2021-01-06 16:01:49,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:01:49,062 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 187 transitions. [2021-01-06 16:01:49,062 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 16:01:49,062 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 187 transitions. [2021-01-06 16:01:49,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-01-06 16:01:49,063 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:49,063 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:49,278 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:01:49,279 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:49,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:49,280 INFO L82 PathProgramCache]: Analyzing trace with hash -175823195, now seen corresponding path program 18 times [2021-01-06 16:01:49,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:49,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023244170] [2021-01-06 16:01:49,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:49,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:49,587 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:49,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023244170] [2021-01-06 16:01:49,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14911760] [2021-01-06 16:01:49,587 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:01:49,741 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-01-06 16:01:49,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:01:49,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 16:01:49,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:01:49,966 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:49,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:01:49,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-01-06 16:01:49,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013818178] [2021-01-06 16:01:49,968 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 16:01:49,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:01:49,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 16:01:49,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-01-06 16:01:49,969 INFO L87 Difference]: Start difference. First operand 151 states and 187 transitions. Second operand 22 states. [2021-01-06 16:01:50,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:01:50,049 INFO L93 Difference]: Finished difference Result 170 states and 210 transitions. [2021-01-06 16:01:50,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 16:01:50,050 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 132 [2021-01-06 16:01:50,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:01:50,051 INFO L225 Difference]: With dead ends: 170 [2021-01-06 16:01:50,051 INFO L226 Difference]: Without dead ends: 166 [2021-01-06 16:01:50,052 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-01-06 16:01:50,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-01-06 16:01:50,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 159. [2021-01-06 16:01:50,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2021-01-06 16:01:50,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 197 transitions. [2021-01-06 16:01:50,056 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 197 transitions. Word has length 132 [2021-01-06 16:01:50,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:01:50,057 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 197 transitions. [2021-01-06 16:01:50,057 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 16:01:50,057 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 197 transitions. [2021-01-06 16:01:50,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-01-06 16:01:50,058 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:50,058 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:50,271 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:01:50,272 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:50,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:50,273 INFO L82 PathProgramCache]: Analyzing trace with hash 733807766, now seen corresponding path program 19 times [2021-01-06 16:01:50,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:50,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155880157] [2021-01-06 16:01:50,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:50,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:50,635 INFO L134 CoverageAnalysis]: Checked inductivity of 1216 backedges. 0 proven. 1216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:50,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155880157] [2021-01-06 16:01:50,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562870304] [2021-01-06 16:01:50,636 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:01:50,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:50,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 16:01:50,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:01:50,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1216 backedges. 0 proven. 1216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:50,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:01:50,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-01-06 16:01:50,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075246418] [2021-01-06 16:01:50,971 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-06 16:01:50,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:01:50,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-06 16:01:50,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-01-06 16:01:50,972 INFO L87 Difference]: Start difference. First operand 159 states and 197 transitions. Second operand 23 states. [2021-01-06 16:01:51,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:01:51,064 INFO L93 Difference]: Finished difference Result 178 states and 220 transitions. [2021-01-06 16:01:51,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 16:01:51,065 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 139 [2021-01-06 16:01:51,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:01:51,067 INFO L225 Difference]: With dead ends: 178 [2021-01-06 16:01:51,067 INFO L226 Difference]: Without dead ends: 174 [2021-01-06 16:01:51,068 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-01-06 16:01:51,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-01-06 16:01:51,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 167. [2021-01-06 16:01:51,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2021-01-06 16:01:51,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 207 transitions. [2021-01-06 16:01:51,073 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 207 transitions. Word has length 139 [2021-01-06 16:01:51,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:01:51,074 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 207 transitions. [2021-01-06 16:01:51,074 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-01-06 16:01:51,074 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 207 transitions. [2021-01-06 16:01:51,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-01-06 16:01:51,076 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:51,076 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:51,289 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:01:51,290 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:51,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:51,291 INFO L82 PathProgramCache]: Analyzing trace with hash 140363141, now seen corresponding path program 20 times [2021-01-06 16:01:51,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:51,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449455703] [2021-01-06 16:01:51,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:51,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:51,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1350 backedges. 0 proven. 1350 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:51,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449455703] [2021-01-06 16:01:51,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027373630] [2021-01-06 16:01:51,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:01:51,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:01:51,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:01:51,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 16:01:51,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:01:52,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1350 backedges. 0 proven. 1350 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:52,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:01:52,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-01-06 16:01:52,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162559890] [2021-01-06 16:01:52,036 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-01-06 16:01:52,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:01:52,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-01-06 16:01:52,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-01-06 16:01:52,037 INFO L87 Difference]: Start difference. First operand 167 states and 207 transitions. Second operand 24 states. [2021-01-06 16:01:52,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:01:52,148 INFO L93 Difference]: Finished difference Result 186 states and 230 transitions. [2021-01-06 16:01:52,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-06 16:01:52,150 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 146 [2021-01-06 16:01:52,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:01:52,152 INFO L225 Difference]: With dead ends: 186 [2021-01-06 16:01:52,152 INFO L226 Difference]: Without dead ends: 182 [2021-01-06 16:01:52,152 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-01-06 16:01:52,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-01-06 16:01:52,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 175. [2021-01-06 16:01:52,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2021-01-06 16:01:52,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 217 transitions. [2021-01-06 16:01:52,156 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 217 transitions. Word has length 146 [2021-01-06 16:01:52,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:01:52,157 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 217 transitions. [2021-01-06 16:01:52,157 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-01-06 16:01:52,157 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 217 transitions. [2021-01-06 16:01:52,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-01-06 16:01:52,159 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:52,159 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:52,374 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-01-06 16:01:52,375 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:52,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:52,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1801590346, now seen corresponding path program 21 times [2021-01-06 16:01:52,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:52,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88122710] [2021-01-06 16:01:52,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:52,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:52,763 INFO L134 CoverageAnalysis]: Checked inductivity of 1491 backedges. 0 proven. 1491 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:52,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88122710] [2021-01-06 16:01:52,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743868584] [2021-01-06 16:01:52,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:01:52,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-01-06 16:01:52,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:01:52,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 23 conjunts are in the unsatisfiable core [2021-01-06 16:01:52,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:01:53,175 INFO L134 CoverageAnalysis]: Checked inductivity of 1491 backedges. 0 proven. 1491 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:53,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:01:53,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-01-06 16:01:53,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146604346] [2021-01-06 16:01:53,176 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-01-06 16:01:53,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:01:53,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-01-06 16:01:53,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-01-06 16:01:53,178 INFO L87 Difference]: Start difference. First operand 175 states and 217 transitions. Second operand 25 states. [2021-01-06 16:01:53,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:01:53,265 INFO L93 Difference]: Finished difference Result 194 states and 240 transitions. [2021-01-06 16:01:53,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-06 16:01:53,266 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 153 [2021-01-06 16:01:53,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:01:53,271 INFO L225 Difference]: With dead ends: 194 [2021-01-06 16:01:53,271 INFO L226 Difference]: Without dead ends: 190 [2021-01-06 16:01:53,271 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-01-06 16:01:53,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-01-06 16:01:53,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 183. [2021-01-06 16:01:53,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2021-01-06 16:01:53,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 227 transitions. [2021-01-06 16:01:53,277 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 227 transitions. Word has length 153 [2021-01-06 16:01:53,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:01:53,277 INFO L481 AbstractCegarLoop]: Abstraction has 183 states and 227 transitions. [2021-01-06 16:01:53,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2021-01-06 16:01:53,277 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 227 transitions. [2021-01-06 16:01:53,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-01-06 16:01:53,279 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:53,279 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:53,492 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-01-06 16:01:53,493 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:53,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:53,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1288100965, now seen corresponding path program 22 times [2021-01-06 16:01:53,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:53,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809447399] [2021-01-06 16:01:53,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:53,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:53,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1639 backedges. 0 proven. 1639 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:53,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809447399] [2021-01-06 16:01:53,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444198246] [2021-01-06 16:01:53,938 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:01:54,086 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:01:54,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:01:54,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 16:01:54,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:01:54,282 INFO L134 CoverageAnalysis]: Checked inductivity of 1639 backedges. 0 proven. 1639 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:54,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:01:54,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-01-06 16:01:54,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346056331] [2021-01-06 16:01:54,283 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-01-06 16:01:54,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:01:54,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-01-06 16:01:54,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-01-06 16:01:54,284 INFO L87 Difference]: Start difference. First operand 183 states and 227 transitions. Second operand 26 states. [2021-01-06 16:01:54,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:01:54,380 INFO L93 Difference]: Finished difference Result 202 states and 250 transitions. [2021-01-06 16:01:54,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-06 16:01:54,380 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 160 [2021-01-06 16:01:54,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:01:54,382 INFO L225 Difference]: With dead ends: 202 [2021-01-06 16:01:54,382 INFO L226 Difference]: Without dead ends: 198 [2021-01-06 16:01:54,383 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-01-06 16:01:54,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-01-06 16:01:54,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 191. [2021-01-06 16:01:54,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2021-01-06 16:01:54,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 237 transitions. [2021-01-06 16:01:54,388 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 237 transitions. Word has length 160 [2021-01-06 16:01:54,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:01:54,388 INFO L481 AbstractCegarLoop]: Abstraction has 191 states and 237 transitions. [2021-01-06 16:01:54,388 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2021-01-06 16:01:54,388 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 237 transitions. [2021-01-06 16:01:54,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-01-06 16:01:54,390 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:54,390 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:54,604 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:01:54,605 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:54,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:54,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1995921110, now seen corresponding path program 23 times [2021-01-06 16:01:54,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:54,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130101559] [2021-01-06 16:01:54,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:54,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:55,079 INFO L134 CoverageAnalysis]: Checked inductivity of 1794 backedges. 0 proven. 1794 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:55,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130101559] [2021-01-06 16:01:55,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551763428] [2021-01-06 16:01:55,080 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:01:55,283 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-01-06 16:01:55,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:01:55,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 25 conjunts are in the unsatisfiable core [2021-01-06 16:01:55,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:01:55,513 INFO L134 CoverageAnalysis]: Checked inductivity of 1794 backedges. 0 proven. 1794 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:55,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:01:55,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-01-06 16:01:55,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791808275] [2021-01-06 16:01:55,514 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-01-06 16:01:55,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:01:55,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-01-06 16:01:55,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-01-06 16:01:55,515 INFO L87 Difference]: Start difference. First operand 191 states and 237 transitions. Second operand 27 states. [2021-01-06 16:01:55,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:01:55,628 INFO L93 Difference]: Finished difference Result 210 states and 260 transitions. [2021-01-06 16:01:55,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 16:01:55,629 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 167 [2021-01-06 16:01:55,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:01:55,630 INFO L225 Difference]: With dead ends: 210 [2021-01-06 16:01:55,630 INFO L226 Difference]: Without dead ends: 206 [2021-01-06 16:01:55,631 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-01-06 16:01:55,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-01-06 16:01:55,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 199. [2021-01-06 16:01:55,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2021-01-06 16:01:55,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 247 transitions. [2021-01-06 16:01:55,637 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 247 transitions. Word has length 167 [2021-01-06 16:01:55,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:01:55,637 INFO L481 AbstractCegarLoop]: Abstraction has 199 states and 247 transitions. [2021-01-06 16:01:55,637 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2021-01-06 16:01:55,637 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 247 transitions. [2021-01-06 16:01:55,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-01-06 16:01:55,638 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:55,638 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:55,851 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-01-06 16:01:55,852 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:55,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:55,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1601279163, now seen corresponding path program 24 times [2021-01-06 16:01:55,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:55,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443652988] [2021-01-06 16:01:55,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:55,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:56,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1956 backedges. 0 proven. 1956 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:56,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443652988] [2021-01-06 16:01:56,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899253958] [2021-01-06 16:01:56,368 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:01:56,563 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2021-01-06 16:01:56,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:01:56,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 569 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-06 16:01:56,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:01:56,760 INFO L134 CoverageAnalysis]: Checked inductivity of 1956 backedges. 0 proven. 1956 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:56,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:01:56,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-01-06 16:01:56,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718869779] [2021-01-06 16:01:56,761 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-01-06 16:01:56,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:01:56,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-01-06 16:01:56,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-01-06 16:01:56,762 INFO L87 Difference]: Start difference. First operand 199 states and 247 transitions. Second operand 28 states. [2021-01-06 16:01:56,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:01:56,895 INFO L93 Difference]: Finished difference Result 218 states and 270 transitions. [2021-01-06 16:01:56,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-06 16:01:56,895 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 174 [2021-01-06 16:01:56,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:01:56,897 INFO L225 Difference]: With dead ends: 218 [2021-01-06 16:01:56,897 INFO L226 Difference]: Without dead ends: 214 [2021-01-06 16:01:56,898 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-01-06 16:01:56,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-01-06 16:01:56,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 207. [2021-01-06 16:01:56,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2021-01-06 16:01:56,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 257 transitions. [2021-01-06 16:01:56,905 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 257 transitions. Word has length 174 [2021-01-06 16:01:56,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:01:56,905 INFO L481 AbstractCegarLoop]: Abstraction has 207 states and 257 transitions. [2021-01-06 16:01:56,905 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2021-01-06 16:01:56,906 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 257 transitions. [2021-01-06 16:01:56,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2021-01-06 16:01:56,907 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:56,907 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:57,114 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:01:57,115 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:57,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:57,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1899711478, now seen corresponding path program 25 times [2021-01-06 16:01:57,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:57,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052040685] [2021-01-06 16:01:57,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:57,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:57,647 INFO L134 CoverageAnalysis]: Checked inductivity of 2125 backedges. 0 proven. 2125 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:57,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052040685] [2021-01-06 16:01:57,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910053635] [2021-01-06 16:01:57,648 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:01:57,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:57,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 591 conjuncts, 27 conjunts are in the unsatisfiable core [2021-01-06 16:01:57,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:01:58,006 INFO L134 CoverageAnalysis]: Checked inductivity of 2125 backedges. 0 proven. 2125 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:58,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:01:58,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-01-06 16:01:58,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415633517] [2021-01-06 16:01:58,007 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-01-06 16:01:58,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:01:58,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-01-06 16:01:58,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-01-06 16:01:58,008 INFO L87 Difference]: Start difference. First operand 207 states and 257 transitions. Second operand 29 states. [2021-01-06 16:01:58,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:01:58,140 INFO L93 Difference]: Finished difference Result 226 states and 280 transitions. [2021-01-06 16:01:58,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-06 16:01:58,141 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 181 [2021-01-06 16:01:58,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:01:58,142 INFO L225 Difference]: With dead ends: 226 [2021-01-06 16:01:58,142 INFO L226 Difference]: Without dead ends: 222 [2021-01-06 16:01:58,143 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-01-06 16:01:58,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-01-06 16:01:58,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 215. [2021-01-06 16:01:58,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2021-01-06 16:01:58,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 267 transitions. [2021-01-06 16:01:58,149 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 267 transitions. Word has length 181 [2021-01-06 16:01:58,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:01:58,150 INFO L481 AbstractCegarLoop]: Abstraction has 215 states and 267 transitions. [2021-01-06 16:01:58,150 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2021-01-06 16:01:58,150 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 267 transitions. [2021-01-06 16:01:58,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-01-06 16:01:58,151 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:58,151 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:58,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-01-06 16:01:58,367 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:58,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:58,368 INFO L82 PathProgramCache]: Analyzing trace with hash -1593675227, now seen corresponding path program 26 times [2021-01-06 16:01:58,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:58,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921963095] [2021-01-06 16:01:58,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:58,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:58,954 INFO L134 CoverageAnalysis]: Checked inductivity of 2301 backedges. 0 proven. 2301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:58,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921963095] [2021-01-06 16:01:58,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038786009] [2021-01-06 16:01:58,954 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:01:59,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:01:59,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:01:59,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 613 conjuncts, 28 conjunts are in the unsatisfiable core [2021-01-06 16:01:59,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:01:59,353 INFO L134 CoverageAnalysis]: Checked inductivity of 2301 backedges. 0 proven. 2301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:59,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:01:59,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-01-06 16:01:59,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190383455] [2021-01-06 16:01:59,355 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-01-06 16:01:59,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:01:59,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-01-06 16:01:59,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-01-06 16:01:59,356 INFO L87 Difference]: Start difference. First operand 215 states and 267 transitions. Second operand 30 states. [2021-01-06 16:01:59,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:01:59,490 INFO L93 Difference]: Finished difference Result 234 states and 290 transitions. [2021-01-06 16:01:59,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-06 16:01:59,490 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 188 [2021-01-06 16:01:59,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:01:59,492 INFO L225 Difference]: With dead ends: 234 [2021-01-06 16:01:59,492 INFO L226 Difference]: Without dead ends: 230 [2021-01-06 16:01:59,493 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-01-06 16:01:59,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-01-06 16:01:59,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 223. [2021-01-06 16:01:59,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2021-01-06 16:01:59,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 277 transitions. [2021-01-06 16:01:59,501 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 277 transitions. Word has length 188 [2021-01-06 16:01:59,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:01:59,502 INFO L481 AbstractCegarLoop]: Abstraction has 223 states and 277 transitions. [2021-01-06 16:01:59,502 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2021-01-06 16:01:59,502 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 277 transitions. [2021-01-06 16:01:59,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-01-06 16:01:59,503 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:59,503 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:59,716 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-01-06 16:01:59,717 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:59,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:59,717 INFO L82 PathProgramCache]: Analyzing trace with hash -228865770, now seen corresponding path program 27 times [2021-01-06 16:01:59,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:59,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800433374] [2021-01-06 16:01:59,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:59,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:00,322 INFO L134 CoverageAnalysis]: Checked inductivity of 2484 backedges. 0 proven. 2484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:00,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800433374] [2021-01-06 16:02:00,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510562769] [2021-01-06 16:02:00,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:02:00,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2021-01-06 16:02:00,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:02:00,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 635 conjuncts, 29 conjunts are in the unsatisfiable core [2021-01-06 16:02:00,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:02:00,834 INFO L134 CoverageAnalysis]: Checked inductivity of 2484 backedges. 0 proven. 2484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:00,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:02:00,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-01-06 16:02:00,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940463654] [2021-01-06 16:02:00,835 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-01-06 16:02:00,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:02:00,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-01-06 16:02:00,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2021-01-06 16:02:00,837 INFO L87 Difference]: Start difference. First operand 223 states and 277 transitions. Second operand 31 states. [2021-01-06 16:02:00,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:02:00,995 INFO L93 Difference]: Finished difference Result 242 states and 300 transitions. [2021-01-06 16:02:00,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-06 16:02:00,996 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 195 [2021-01-06 16:02:00,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:02:00,998 INFO L225 Difference]: With dead ends: 242 [2021-01-06 16:02:00,998 INFO L226 Difference]: Without dead ends: 238 [2021-01-06 16:02:01,001 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2021-01-06 16:02:01,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-01-06 16:02:01,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 231. [2021-01-06 16:02:01,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2021-01-06 16:02:01,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 287 transitions. [2021-01-06 16:02:01,008 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 287 transitions. Word has length 195 [2021-01-06 16:02:01,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:02:01,008 INFO L481 AbstractCegarLoop]: Abstraction has 231 states and 287 transitions. [2021-01-06 16:02:01,008 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2021-01-06 16:02:01,008 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 287 transitions. [2021-01-06 16:02:01,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2021-01-06 16:02:01,010 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:02:01,010 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1] [2021-01-06 16:02:01,225 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-01-06 16:02:01,225 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:02:01,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:02:01,226 INFO L82 PathProgramCache]: Analyzing trace with hash -1963921147, now seen corresponding path program 28 times [2021-01-06 16:02:01,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:02:01,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461198994] [2021-01-06 16:02:01,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:02:01,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:01,876 INFO L134 CoverageAnalysis]: Checked inductivity of 2674 backedges. 0 proven. 2674 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:01,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461198994] [2021-01-06 16:02:01,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619459163] [2021-01-06 16:02:01,876 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:02:02,050 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:02:02,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:02:02,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 657 conjuncts, 30 conjunts are in the unsatisfiable core [2021-01-06 16:02:02,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:02:02,311 INFO L134 CoverageAnalysis]: Checked inductivity of 2674 backedges. 0 proven. 2674 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:02,311 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:02:02,311 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-01-06 16:02:02,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484468700] [2021-01-06 16:02:02,312 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-01-06 16:02:02,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:02:02,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-01-06 16:02:02,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-01-06 16:02:02,314 INFO L87 Difference]: Start difference. First operand 231 states and 287 transitions. Second operand 32 states. [2021-01-06 16:02:02,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:02:02,493 INFO L93 Difference]: Finished difference Result 250 states and 310 transitions. [2021-01-06 16:02:02,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-06 16:02:02,493 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 202 [2021-01-06 16:02:02,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:02:02,495 INFO L225 Difference]: With dead ends: 250 [2021-01-06 16:02:02,495 INFO L226 Difference]: Without dead ends: 246 [2021-01-06 16:02:02,496 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-01-06 16:02:02,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-01-06 16:02:02,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 239. [2021-01-06 16:02:02,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2021-01-06 16:02:02,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 297 transitions. [2021-01-06 16:02:02,505 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 297 transitions. Word has length 202 [2021-01-06 16:02:02,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:02:02,506 INFO L481 AbstractCegarLoop]: Abstraction has 239 states and 297 transitions. [2021-01-06 16:02:02,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2021-01-06 16:02:02,506 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 297 transitions. [2021-01-06 16:02:02,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2021-01-06 16:02:02,507 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:02:02,507 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1] [2021-01-06 16:02:02,721 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:02:02,721 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:02:02,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:02:02,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1506463286, now seen corresponding path program 29 times [2021-01-06 16:02:02,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:02:02,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127024426] [2021-01-06 16:02:02,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:02:02,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:03,456 INFO L134 CoverageAnalysis]: Checked inductivity of 2871 backedges. 0 proven. 2871 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:03,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127024426] [2021-01-06 16:02:03,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774252365] [2021-01-06 16:02:03,457 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:02:03,676 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2021-01-06 16:02:03,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:02:03,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 679 conjuncts, 31 conjunts are in the unsatisfiable core [2021-01-06 16:02:03,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:02:03,925 INFO L134 CoverageAnalysis]: Checked inductivity of 2871 backedges. 0 proven. 2871 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:03,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:02:03,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-01-06 16:02:03,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710957534] [2021-01-06 16:02:03,927 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-01-06 16:02:03,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:02:03,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-01-06 16:02:03,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 16:02:03,928 INFO L87 Difference]: Start difference. First operand 239 states and 297 transitions. Second operand 33 states. [2021-01-06 16:02:04,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:02:04,062 INFO L93 Difference]: Finished difference Result 258 states and 320 transitions. [2021-01-06 16:02:04,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-06 16:02:04,063 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 209 [2021-01-06 16:02:04,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:02:04,064 INFO L225 Difference]: With dead ends: 258 [2021-01-06 16:02:04,065 INFO L226 Difference]: Without dead ends: 254 [2021-01-06 16:02:04,065 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 16:02:04,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-01-06 16:02:04,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 247. [2021-01-06 16:02:04,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2021-01-06 16:02:04,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 307 transitions. [2021-01-06 16:02:04,072 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 307 transitions. Word has length 209 [2021-01-06 16:02:04,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:02:04,072 INFO L481 AbstractCegarLoop]: Abstraction has 247 states and 307 transitions. [2021-01-06 16:02:04,072 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2021-01-06 16:02:04,072 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 307 transitions. [2021-01-06 16:02:04,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2021-01-06 16:02:04,073 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:02:04,073 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1] [2021-01-06 16:02:04,287 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-01-06 16:02:04,288 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:02:04,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:02:04,288 INFO L82 PathProgramCache]: Analyzing trace with hash 447211493, now seen corresponding path program 30 times [2021-01-06 16:02:04,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:02:04,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100071433] [2021-01-06 16:02:04,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:02:04,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:05,011 INFO L134 CoverageAnalysis]: Checked inductivity of 3075 backedges. 0 proven. 3075 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:05,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100071433] [2021-01-06 16:02:05,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013455469] [2021-01-06 16:02:05,012 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:02:05,302 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2021-01-06 16:02:05,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:02:05,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 701 conjuncts, 32 conjunts are in the unsatisfiable core [2021-01-06 16:02:05,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:02:05,585 INFO L134 CoverageAnalysis]: Checked inductivity of 3075 backedges. 0 proven. 3075 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:05,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:02:05,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-01-06 16:02:05,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767149209] [2021-01-06 16:02:05,587 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-01-06 16:02:05,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:02:05,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-01-06 16:02:05,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 16:02:05,588 INFO L87 Difference]: Start difference. First operand 247 states and 307 transitions. Second operand 34 states. [2021-01-06 16:02:05,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:02:05,772 INFO L93 Difference]: Finished difference Result 266 states and 330 transitions. [2021-01-06 16:02:05,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-01-06 16:02:05,772 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 216 [2021-01-06 16:02:05,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:02:05,774 INFO L225 Difference]: With dead ends: 266 [2021-01-06 16:02:05,774 INFO L226 Difference]: Without dead ends: 262 [2021-01-06 16:02:05,775 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 16:02:05,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-01-06 16:02:05,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 255. [2021-01-06 16:02:05,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2021-01-06 16:02:05,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 317 transitions. [2021-01-06 16:02:05,783 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 317 transitions. Word has length 216 [2021-01-06 16:02:05,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:02:05,783 INFO L481 AbstractCegarLoop]: Abstraction has 255 states and 317 transitions. [2021-01-06 16:02:05,784 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2021-01-06 16:02:05,784 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 317 transitions. [2021-01-06 16:02:05,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2021-01-06 16:02:05,785 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:02:05,785 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1] [2021-01-06 16:02:06,000 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:02:06,001 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:02:06,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:02:06,002 INFO L82 PathProgramCache]: Analyzing trace with hash 393894742, now seen corresponding path program 31 times [2021-01-06 16:02:06,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:02:06,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741753531] [2021-01-06 16:02:06,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:02:06,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:06,710 INFO L134 CoverageAnalysis]: Checked inductivity of 3286 backedges. 0 proven. 3286 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:06,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741753531] [2021-01-06 16:02:06,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172270193] [2021-01-06 16:02:06,710 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:02:06,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:06,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 723 conjuncts, 33 conjunts are in the unsatisfiable core [2021-01-06 16:02:06,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:02:07,178 INFO L134 CoverageAnalysis]: Checked inductivity of 3286 backedges. 0 proven. 3286 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:07,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:02:07,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-01-06 16:02:07,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969458329] [2021-01-06 16:02:07,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-01-06 16:02:07,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:02:07,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-01-06 16:02:07,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 16:02:07,181 INFO L87 Difference]: Start difference. First operand 255 states and 317 transitions. Second operand 35 states. [2021-01-06 16:02:07,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:02:07,350 INFO L93 Difference]: Finished difference Result 274 states and 340 transitions. [2021-01-06 16:02:07,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-06 16:02:07,350 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 223 [2021-01-06 16:02:07,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:02:07,353 INFO L225 Difference]: With dead ends: 274 [2021-01-06 16:02:07,353 INFO L226 Difference]: Without dead ends: 270 [2021-01-06 16:02:07,354 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 16:02:07,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-01-06 16:02:07,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 263. [2021-01-06 16:02:07,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2021-01-06 16:02:07,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 327 transitions. [2021-01-06 16:02:07,360 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 327 transitions. Word has length 223 [2021-01-06 16:02:07,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:02:07,361 INFO L481 AbstractCegarLoop]: Abstraction has 263 states and 327 transitions. [2021-01-06 16:02:07,361 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2021-01-06 16:02:07,361 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 327 transitions. [2021-01-06 16:02:07,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2021-01-06 16:02:07,362 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:02:07,362 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1] [2021-01-06 16:02:07,577 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-01-06 16:02:07,578 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:02:07,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:02:07,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1811240645, now seen corresponding path program 32 times [2021-01-06 16:02:07,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:02:07,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128421378] [2021-01-06 16:02:07,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:02:07,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:08,377 INFO L134 CoverageAnalysis]: Checked inductivity of 3504 backedges. 0 proven. 3504 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:08,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128421378] [2021-01-06 16:02:08,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255501105] [2021-01-06 16:02:08,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:02:08,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:02:08,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:02:08,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 745 conjuncts, 34 conjunts are in the unsatisfiable core [2021-01-06 16:02:08,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:02:08,840 INFO L134 CoverageAnalysis]: Checked inductivity of 3504 backedges. 0 proven. 3504 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:08,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:02:08,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-01-06 16:02:08,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981588216] [2021-01-06 16:02:08,841 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-01-06 16:02:08,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:02:08,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-01-06 16:02:08,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 16:02:08,843 INFO L87 Difference]: Start difference. First operand 263 states and 327 transitions. Second operand 36 states. [2021-01-06 16:02:09,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:02:09,050 INFO L93 Difference]: Finished difference Result 282 states and 350 transitions. [2021-01-06 16:02:09,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-01-06 16:02:09,050 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 230 [2021-01-06 16:02:09,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:02:09,052 INFO L225 Difference]: With dead ends: 282 [2021-01-06 16:02:09,052 INFO L226 Difference]: Without dead ends: 278 [2021-01-06 16:02:09,053 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 16:02:09,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-01-06 16:02:09,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 271. [2021-01-06 16:02:09,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2021-01-06 16:02:09,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 337 transitions. [2021-01-06 16:02:09,060 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 337 transitions. Word has length 230 [2021-01-06 16:02:09,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:02:09,061 INFO L481 AbstractCegarLoop]: Abstraction has 271 states and 337 transitions. [2021-01-06 16:02:09,061 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2021-01-06 16:02:09,061 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 337 transitions. [2021-01-06 16:02:09,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2021-01-06 16:02:09,062 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:02:09,062 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1] [2021-01-06 16:02:09,276 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-01-06 16:02:09,276 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:02:09,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:02:09,277 INFO L82 PathProgramCache]: Analyzing trace with hash -874745738, now seen corresponding path program 33 times [2021-01-06 16:02:09,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:02:09,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955436607] [2021-01-06 16:02:09,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:02:09,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:10,128 INFO L134 CoverageAnalysis]: Checked inductivity of 3729 backedges. 0 proven. 3729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:10,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955436607] [2021-01-06 16:02:10,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432975055] [2021-01-06 16:02:10,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:02:10,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2021-01-06 16:02:10,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:02:10,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 767 conjuncts, 35 conjunts are in the unsatisfiable core [2021-01-06 16:02:10,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:02:10,647 INFO L134 CoverageAnalysis]: Checked inductivity of 3729 backedges. 0 proven. 3729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:10,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:02:10,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-01-06 16:02:10,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510556171] [2021-01-06 16:02:10,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-01-06 16:02:10,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:02:10,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-01-06 16:02:10,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 16:02:10,649 INFO L87 Difference]: Start difference. First operand 271 states and 337 transitions. Second operand 37 states. [2021-01-06 16:02:10,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:02:10,882 INFO L93 Difference]: Finished difference Result 290 states and 360 transitions. [2021-01-06 16:02:10,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-01-06 16:02:10,882 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 237 [2021-01-06 16:02:10,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:02:10,885 INFO L225 Difference]: With dead ends: 290 [2021-01-06 16:02:10,885 INFO L226 Difference]: Without dead ends: 286 [2021-01-06 16:02:10,885 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 16:02:10,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-01-06 16:02:10,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 279. [2021-01-06 16:02:10,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 279 states. [2021-01-06 16:02:10,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 347 transitions. [2021-01-06 16:02:10,892 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 347 transitions. Word has length 237 [2021-01-06 16:02:10,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:02:10,893 INFO L481 AbstractCegarLoop]: Abstraction has 279 states and 347 transitions. [2021-01-06 16:02:10,893 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2021-01-06 16:02:10,893 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 347 transitions. [2021-01-06 16:02:10,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2021-01-06 16:02:10,894 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:02:10,895 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1] [2021-01-06 16:02:11,107 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-01-06 16:02:11,108 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:02:11,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:02:11,108 INFO L82 PathProgramCache]: Analyzing trace with hash -634962523, now seen corresponding path program 34 times [2021-01-06 16:02:11,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:02:11,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556654869] [2021-01-06 16:02:11,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:02:11,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:12,086 INFO L134 CoverageAnalysis]: Checked inductivity of 3961 backedges. 0 proven. 3961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:12,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556654869] [2021-01-06 16:02:12,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897403032] [2021-01-06 16:02:12,086 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:02:12,296 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:02:12,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:02:12,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 789 conjuncts, 36 conjunts are in the unsatisfiable core [2021-01-06 16:02:12,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:02:12,642 INFO L134 CoverageAnalysis]: Checked inductivity of 3961 backedges. 0 proven. 3961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:12,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:02:12,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-01-06 16:02:12,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774380076] [2021-01-06 16:02:12,644 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-01-06 16:02:12,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:02:12,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-01-06 16:02:12,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 16:02:12,645 INFO L87 Difference]: Start difference. First operand 279 states and 347 transitions. Second operand 38 states. [2021-01-06 16:02:12,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:02:12,829 INFO L93 Difference]: Finished difference Result 298 states and 370 transitions. [2021-01-06 16:02:12,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-01-06 16:02:12,829 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 244 [2021-01-06 16:02:12,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:02:12,831 INFO L225 Difference]: With dead ends: 298 [2021-01-06 16:02:12,831 INFO L226 Difference]: Without dead ends: 294 [2021-01-06 16:02:12,832 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 16:02:12,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-01-06 16:02:12,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 287. [2021-01-06 16:02:12,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2021-01-06 16:02:12,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 357 transitions. [2021-01-06 16:02:12,839 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 357 transitions. Word has length 244 [2021-01-06 16:02:12,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:02:12,839 INFO L481 AbstractCegarLoop]: Abstraction has 287 states and 357 transitions. [2021-01-06 16:02:12,840 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2021-01-06 16:02:12,840 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 357 transitions. [2021-01-06 16:02:12,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2021-01-06 16:02:12,841 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:02:12,841 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1] [2021-01-06 16:02:13,055 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-01-06 16:02:13,056 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:02:13,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:02:13,056 INFO L82 PathProgramCache]: Analyzing trace with hash 1742933398, now seen corresponding path program 35 times [2021-01-06 16:02:13,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:02:13,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626968005] [2021-01-06 16:02:13,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:02:13,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:13,989 INFO L134 CoverageAnalysis]: Checked inductivity of 4200 backedges. 0 proven. 4200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:13,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626968005] [2021-01-06 16:02:13,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867999685] [2021-01-06 16:02:13,990 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:02:14,255 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2021-01-06 16:02:14,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:02:14,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 37 conjunts are in the unsatisfiable core [2021-01-06 16:02:14,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:02:14,569 INFO L134 CoverageAnalysis]: Checked inductivity of 4200 backedges. 0 proven. 4200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:14,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:02:14,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2021-01-06 16:02:14,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347778637] [2021-01-06 16:02:14,571 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-01-06 16:02:14,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:02:14,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-01-06 16:02:14,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-01-06 16:02:14,572 INFO L87 Difference]: Start difference. First operand 287 states and 357 transitions. Second operand 39 states. [2021-01-06 16:02:14,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:02:14,784 INFO L93 Difference]: Finished difference Result 306 states and 380 transitions. [2021-01-06 16:02:14,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-01-06 16:02:14,786 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 251 [2021-01-06 16:02:14,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:02:14,788 INFO L225 Difference]: With dead ends: 306 [2021-01-06 16:02:14,789 INFO L226 Difference]: Without dead ends: 302 [2021-01-06 16:02:14,789 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-01-06 16:02:14,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-01-06 16:02:14,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 295. [2021-01-06 16:02:14,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 295 states. [2021-01-06 16:02:14,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 367 transitions. [2021-01-06 16:02:14,796 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 367 transitions. Word has length 251 [2021-01-06 16:02:14,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:02:14,797 INFO L481 AbstractCegarLoop]: Abstraction has 295 states and 367 transitions. [2021-01-06 16:02:14,797 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2021-01-06 16:02:14,797 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 367 transitions. [2021-01-06 16:02:14,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2021-01-06 16:02:14,798 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:02:14,798 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1] [2021-01-06 16:02:15,011 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-01-06 16:02:15,012 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:02:15,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:02:15,012 INFO L82 PathProgramCache]: Analyzing trace with hash -536109947, now seen corresponding path program 36 times [2021-01-06 16:02:15,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:02:15,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563178377] [2021-01-06 16:02:15,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:02:15,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:16,027 INFO L134 CoverageAnalysis]: Checked inductivity of 4446 backedges. 0 proven. 4446 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:16,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563178377] [2021-01-06 16:02:16,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462797688] [2021-01-06 16:02:16,027 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:02:16,297 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2021-01-06 16:02:16,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:02:16,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 833 conjuncts, 38 conjunts are in the unsatisfiable core [2021-01-06 16:02:16,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:02:16,603 INFO L134 CoverageAnalysis]: Checked inductivity of 4446 backedges. 0 proven. 4446 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:16,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:02:16,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2021-01-06 16:02:16,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109955993] [2021-01-06 16:02:16,604 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-01-06 16:02:16,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:02:16,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-01-06 16:02:16,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 16:02:16,606 INFO L87 Difference]: Start difference. First operand 295 states and 367 transitions. Second operand 40 states. [2021-01-06 16:02:16,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:02:16,810 INFO L93 Difference]: Finished difference Result 314 states and 390 transitions. [2021-01-06 16:02:16,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-01-06 16:02:16,810 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 258 [2021-01-06 16:02:16,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:02:16,812 INFO L225 Difference]: With dead ends: 314 [2021-01-06 16:02:16,812 INFO L226 Difference]: Without dead ends: 310 [2021-01-06 16:02:16,813 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 16:02:16,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-01-06 16:02:16,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 303. [2021-01-06 16:02:16,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 303 states. [2021-01-06 16:02:16,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 377 transitions. [2021-01-06 16:02:16,820 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 377 transitions. Word has length 258 [2021-01-06 16:02:16,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:02:16,821 INFO L481 AbstractCegarLoop]: Abstraction has 303 states and 377 transitions. [2021-01-06 16:02:16,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2021-01-06 16:02:16,821 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 377 transitions. [2021-01-06 16:02:16,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2021-01-06 16:02:16,823 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:02:16,823 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1] [2021-01-06 16:02:17,038 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-01-06 16:02:17,039 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:02:17,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:02:17,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1291858614, now seen corresponding path program 37 times [2021-01-06 16:02:17,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:02:17,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351181475] [2021-01-06 16:02:17,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:02:17,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:18,132 INFO L134 CoverageAnalysis]: Checked inductivity of 4699 backedges. 0 proven. 4699 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:18,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351181475] [2021-01-06 16:02:18,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759262466] [2021-01-06 16:02:18,132 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:02:18,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:18,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 855 conjuncts, 39 conjunts are in the unsatisfiable core [2021-01-06 16:02:18,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:02:18,640 INFO L134 CoverageAnalysis]: Checked inductivity of 4699 backedges. 0 proven. 4699 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:18,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:02:18,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2021-01-06 16:02:18,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625081631] [2021-01-06 16:02:18,641 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-01-06 16:02:18,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:02:18,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-01-06 16:02:18,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 16:02:18,643 INFO L87 Difference]: Start difference. First operand 303 states and 377 transitions. Second operand 41 states. [2021-01-06 16:02:18,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:02:18,904 INFO L93 Difference]: Finished difference Result 322 states and 400 transitions. [2021-01-06 16:02:18,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-01-06 16:02:18,909 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 265 [2021-01-06 16:02:18,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:02:18,911 INFO L225 Difference]: With dead ends: 322 [2021-01-06 16:02:18,911 INFO L226 Difference]: Without dead ends: 318 [2021-01-06 16:02:18,912 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 265 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 16:02:18,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-01-06 16:02:18,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 311. [2021-01-06 16:02:18,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 311 states. [2021-01-06 16:02:18,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 387 transitions. [2021-01-06 16:02:18,919 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 387 transitions. Word has length 265 [2021-01-06 16:02:18,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:02:18,919 INFO L481 AbstractCegarLoop]: Abstraction has 311 states and 387 transitions. [2021-01-06 16:02:18,919 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2021-01-06 16:02:18,920 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 387 transitions. [2021-01-06 16:02:18,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2021-01-06 16:02:18,921 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:02:18,921 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1] [2021-01-06 16:02:19,134 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-01-06 16:02:19,134 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:02:19,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:02:19,135 INFO L82 PathProgramCache]: Analyzing trace with hash -135236763, now seen corresponding path program 38 times [2021-01-06 16:02:19,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:02:19,135 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540013834] [2021-01-06 16:02:19,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:02:19,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:20,239 INFO L134 CoverageAnalysis]: Checked inductivity of 4959 backedges. 0 proven. 4959 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:20,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540013834] [2021-01-06 16:02:20,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612828441] [2021-01-06 16:02:20,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:02:20,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:02:20,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:02:20,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 877 conjuncts, 40 conjunts are in the unsatisfiable core [2021-01-06 16:02:20,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:02:20,814 INFO L134 CoverageAnalysis]: Checked inductivity of 4959 backedges. 0 proven. 4959 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:20,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:02:20,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2021-01-06 16:02:20,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316454150] [2021-01-06 16:02:20,815 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-01-06 16:02:20,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:02:20,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-01-06 16:02:20,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-01-06 16:02:20,816 INFO L87 Difference]: Start difference. First operand 311 states and 387 transitions. Second operand 42 states. [2021-01-06 16:02:21,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:02:21,128 INFO L93 Difference]: Finished difference Result 330 states and 410 transitions. [2021-01-06 16:02:21,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-01-06 16:02:21,128 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 272 [2021-01-06 16:02:21,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:02:21,135 INFO L225 Difference]: With dead ends: 330 [2021-01-06 16:02:21,135 INFO L226 Difference]: Without dead ends: 326 [2021-01-06 16:02:21,136 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-01-06 16:02:21,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-01-06 16:02:21,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 319. [2021-01-06 16:02:21,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2021-01-06 16:02:21,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 397 transitions. [2021-01-06 16:02:21,148 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 397 transitions. Word has length 272 [2021-01-06 16:02:21,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:02:21,149 INFO L481 AbstractCegarLoop]: Abstraction has 319 states and 397 transitions. [2021-01-06 16:02:21,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2021-01-06 16:02:21,149 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 397 transitions. [2021-01-06 16:02:21,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2021-01-06 16:02:21,157 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:02:21,157 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1] [2021-01-06 16:02:21,371 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-01-06 16:02:21,371 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:02:21,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:02:21,372 INFO L82 PathProgramCache]: Analyzing trace with hash 1831198678, now seen corresponding path program 39 times [2021-01-06 16:02:21,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:02:21,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036910199] [2021-01-06 16:02:21,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:02:21,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:22,527 INFO L134 CoverageAnalysis]: Checked inductivity of 5226 backedges. 0 proven. 5226 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:22,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036910199] [2021-01-06 16:02:22,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008543184] [2021-01-06 16:02:22,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:02:22,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2021-01-06 16:02:22,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:02:22,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 899 conjuncts, 41 conjunts are in the unsatisfiable core [2021-01-06 16:02:22,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:02:23,169 INFO L134 CoverageAnalysis]: Checked inductivity of 5226 backedges. 0 proven. 5226 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:23,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:02:23,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2021-01-06 16:02:23,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53362395] [2021-01-06 16:02:23,170 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-01-06 16:02:23,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:02:23,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-01-06 16:02:23,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2021-01-06 16:02:23,171 INFO L87 Difference]: Start difference. First operand 319 states and 397 transitions. Second operand 43 states. [2021-01-06 16:02:23,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:02:23,419 INFO L93 Difference]: Finished difference Result 338 states and 420 transitions. [2021-01-06 16:02:23,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-01-06 16:02:23,419 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 279 [2021-01-06 16:02:23,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:02:23,421 INFO L225 Difference]: With dead ends: 338 [2021-01-06 16:02:23,421 INFO L226 Difference]: Without dead ends: 334 [2021-01-06 16:02:23,422 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 279 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2021-01-06 16:02:23,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-01-06 16:02:23,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 327. [2021-01-06 16:02:23,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 327 states. [2021-01-06 16:02:23,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 407 transitions. [2021-01-06 16:02:23,428 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 407 transitions. Word has length 279 [2021-01-06 16:02:23,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:02:23,429 INFO L481 AbstractCegarLoop]: Abstraction has 327 states and 407 transitions. [2021-01-06 16:02:23,429 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2021-01-06 16:02:23,429 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 407 transitions. [2021-01-06 16:02:23,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2021-01-06 16:02:23,431 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:02:23,431 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1] [2021-01-06 16:02:23,646 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:02:23,647 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:02:23,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:02:23,647 INFO L82 PathProgramCache]: Analyzing trace with hash 2074329669, now seen corresponding path program 40 times [2021-01-06 16:02:23,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:02:23,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503237052] [2021-01-06 16:02:23,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:02:23,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:24,920 INFO L134 CoverageAnalysis]: Checked inductivity of 5500 backedges. 0 proven. 5500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:24,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503237052] [2021-01-06 16:02:24,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602892522] [2021-01-06 16:02:24,921 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:02:25,165 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:02:25,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:02:25,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 921 conjuncts, 42 conjunts are in the unsatisfiable core [2021-01-06 16:02:25,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:02:25,520 INFO L134 CoverageAnalysis]: Checked inductivity of 5500 backedges. 0 proven. 5500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:25,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:02:25,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2021-01-06 16:02:25,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670630580] [2021-01-06 16:02:25,521 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-01-06 16:02:25,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:02:25,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-01-06 16:02:25,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2021-01-06 16:02:25,522 INFO L87 Difference]: Start difference. First operand 327 states and 407 transitions. Second operand 44 states. [2021-01-06 16:02:25,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:02:25,727 INFO L93 Difference]: Finished difference Result 346 states and 430 transitions. [2021-01-06 16:02:25,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-01-06 16:02:25,729 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 286 [2021-01-06 16:02:25,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:02:25,731 INFO L225 Difference]: With dead ends: 346 [2021-01-06 16:02:25,731 INFO L226 Difference]: Without dead ends: 342 [2021-01-06 16:02:25,732 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 286 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2021-01-06 16:02:25,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2021-01-06 16:02:25,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 335. [2021-01-06 16:02:25,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 335 states. [2021-01-06 16:02:25,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 417 transitions. [2021-01-06 16:02:25,739 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 417 transitions. Word has length 286 [2021-01-06 16:02:25,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:02:25,739 INFO L481 AbstractCegarLoop]: Abstraction has 335 states and 417 transitions. [2021-01-06 16:02:25,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2021-01-06 16:02:25,739 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 417 transitions. [2021-01-06 16:02:25,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2021-01-06 16:02:25,741 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:02:25,741 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1] [2021-01-06 16:02:25,956 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:02:25,957 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:02:25,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:02:25,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1791366390, now seen corresponding path program 41 times [2021-01-06 16:02:25,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:02:25,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071504629] [2021-01-06 16:02:25,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:02:25,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:27,211 INFO L134 CoverageAnalysis]: Checked inductivity of 5781 backedges. 0 proven. 5781 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:27,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071504629] [2021-01-06 16:02:27,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768338633] [2021-01-06 16:02:27,211 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:02:27,516 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2021-01-06 16:02:27,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:02:27,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 943 conjuncts, 43 conjunts are in the unsatisfiable core [2021-01-06 16:02:27,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:02:27,871 INFO L134 CoverageAnalysis]: Checked inductivity of 5781 backedges. 0 proven. 5781 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:27,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:02:27,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2021-01-06 16:02:27,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919893416] [2021-01-06 16:02:27,872 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-01-06 16:02:27,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:02:27,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-01-06 16:02:27,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2021-01-06 16:02:27,873 INFO L87 Difference]: Start difference. First operand 335 states and 417 transitions. Second operand 45 states. [2021-01-06 16:02:28,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:02:28,102 INFO L93 Difference]: Finished difference Result 354 states and 440 transitions. [2021-01-06 16:02:28,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-01-06 16:02:28,103 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 293 [2021-01-06 16:02:28,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:02:28,105 INFO L225 Difference]: With dead ends: 354 [2021-01-06 16:02:28,105 INFO L226 Difference]: Without dead ends: 350 [2021-01-06 16:02:28,109 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 293 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2021-01-06 16:02:28,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-01-06 16:02:28,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 343. [2021-01-06 16:02:28,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 343 states. [2021-01-06 16:02:28,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 427 transitions. [2021-01-06 16:02:28,118 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 427 transitions. Word has length 293 [2021-01-06 16:02:28,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:02:28,120 INFO L481 AbstractCegarLoop]: Abstraction has 343 states and 427 transitions. [2021-01-06 16:02:28,120 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2021-01-06 16:02:28,120 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 427 transitions. [2021-01-06 16:02:28,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2021-01-06 16:02:28,122 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:02:28,122 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 42, 42, 42, 1, 1, 1, 1, 1, 1] [2021-01-06 16:02:28,337 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-01-06 16:02:28,338 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:02:28,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:02:28,338 INFO L82 PathProgramCache]: Analyzing trace with hash -2072803035, now seen corresponding path program 42 times [2021-01-06 16:02:28,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:02:28,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962578071] [2021-01-06 16:02:28,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:02:28,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:29,638 INFO L134 CoverageAnalysis]: Checked inductivity of 6069 backedges. 0 proven. 6069 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:29,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962578071] [2021-01-06 16:02:29,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275156285] [2021-01-06 16:02:29,640 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:02:29,979 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2021-01-06 16:02:29,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:02:29,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 965 conjuncts, 44 conjunts are in the unsatisfiable core [2021-01-06 16:02:29,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:02:30,373 INFO L134 CoverageAnalysis]: Checked inductivity of 6069 backedges. 0 proven. 6069 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:30,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:02:30,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2021-01-06 16:02:30,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092654462] [2021-01-06 16:02:30,374 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-01-06 16:02:30,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:02:30,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-01-06 16:02:30,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2021-01-06 16:02:30,376 INFO L87 Difference]: Start difference. First operand 343 states and 427 transitions. Second operand 46 states. [2021-01-06 16:02:30,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:02:30,759 INFO L93 Difference]: Finished difference Result 362 states and 450 transitions. [2021-01-06 16:02:30,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-01-06 16:02:30,759 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 300 [2021-01-06 16:02:30,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:02:30,761 INFO L225 Difference]: With dead ends: 362 [2021-01-06 16:02:30,761 INFO L226 Difference]: Without dead ends: 358 [2021-01-06 16:02:30,761 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 300 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2021-01-06 16:02:30,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-01-06 16:02:30,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 351. [2021-01-06 16:02:30,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 351 states. [2021-01-06 16:02:30,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 437 transitions. [2021-01-06 16:02:30,767 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 437 transitions. Word has length 300 [2021-01-06 16:02:30,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:02:30,768 INFO L481 AbstractCegarLoop]: Abstraction has 351 states and 437 transitions. [2021-01-06 16:02:30,768 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2021-01-06 16:02:30,768 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 437 transitions. [2021-01-06 16:02:30,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2021-01-06 16:02:30,770 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:02:30,770 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 43, 43, 43, 1, 1, 1, 1, 1, 1] [2021-01-06 16:02:30,983 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:02:30,984 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:02:30,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:02:30,984 INFO L82 PathProgramCache]: Analyzing trace with hash -1194143210, now seen corresponding path program 43 times [2021-01-06 16:02:30,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:02:30,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373557896] [2021-01-06 16:02:30,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:02:31,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:32,407 INFO L134 CoverageAnalysis]: Checked inductivity of 6364 backedges. 0 proven. 6364 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:32,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373557896] [2021-01-06 16:02:32,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610804925] [2021-01-06 16:02:32,407 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:02:32,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:32,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 987 conjuncts, 45 conjunts are in the unsatisfiable core [2021-01-06 16:02:32,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:02:33,044 INFO L134 CoverageAnalysis]: Checked inductivity of 6364 backedges. 0 proven. 6364 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:33,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:02:33,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 47 [2021-01-06 16:02:33,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901972343] [2021-01-06 16:02:33,045 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-01-06 16:02:33,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:02:33,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-01-06 16:02:33,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2021-01-06 16:02:33,046 INFO L87 Difference]: Start difference. First operand 351 states and 437 transitions. Second operand 47 states. [2021-01-06 16:02:33,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:02:33,296 INFO L93 Difference]: Finished difference Result 370 states and 460 transitions. [2021-01-06 16:02:33,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-01-06 16:02:33,296 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 307 [2021-01-06 16:02:33,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:02:33,298 INFO L225 Difference]: With dead ends: 370 [2021-01-06 16:02:33,298 INFO L226 Difference]: Without dead ends: 366 [2021-01-06 16:02:33,299 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 307 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2021-01-06 16:02:33,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-01-06 16:02:33,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 359. [2021-01-06 16:02:33,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 359 states. [2021-01-06 16:02:33,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 447 transitions. [2021-01-06 16:02:33,306 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 447 transitions. Word has length 307 [2021-01-06 16:02:33,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:02:33,306 INFO L481 AbstractCegarLoop]: Abstraction has 359 states and 447 transitions. [2021-01-06 16:02:33,306 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2021-01-06 16:02:33,306 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 447 transitions. [2021-01-06 16:02:33,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2021-01-06 16:02:33,308 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:02:33,308 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 44, 44, 44, 1, 1, 1, 1, 1, 1] [2021-01-06 16:02:33,523 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:02:33,524 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:02:33,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:02:33,525 INFO L82 PathProgramCache]: Analyzing trace with hash -886192123, now seen corresponding path program 44 times [2021-01-06 16:02:33,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:02:33,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754406627] [2021-01-06 16:02:33,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:02:33,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:34,979 INFO L134 CoverageAnalysis]: Checked inductivity of 6666 backedges. 0 proven. 6666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:34,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754406627] [2021-01-06 16:02:34,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005710307] [2021-01-06 16:02:34,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:02:35,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:02:35,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:02:35,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 1009 conjuncts, 46 conjunts are in the unsatisfiable core [2021-01-06 16:02:35,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:02:35,651 INFO L134 CoverageAnalysis]: Checked inductivity of 6666 backedges. 0 proven. 6666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:35,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:02:35,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2021-01-06 16:02:35,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250099192] [2021-01-06 16:02:35,652 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-01-06 16:02:35,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:02:35,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-01-06 16:02:35,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2021-01-06 16:02:35,653 INFO L87 Difference]: Start difference. First operand 359 states and 447 transitions. Second operand 48 states. [2021-01-06 16:02:35,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:02:35,959 INFO L93 Difference]: Finished difference Result 378 states and 470 transitions. [2021-01-06 16:02:35,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-01-06 16:02:35,961 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 314 [2021-01-06 16:02:35,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:02:35,963 INFO L225 Difference]: With dead ends: 378 [2021-01-06 16:02:35,964 INFO L226 Difference]: Without dead ends: 374 [2021-01-06 16:02:35,964 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 314 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2021-01-06 16:02:35,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2021-01-06 16:02:35,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 367. [2021-01-06 16:02:35,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 367 states. [2021-01-06 16:02:35,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 457 transitions. [2021-01-06 16:02:35,972 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 457 transitions. Word has length 314 [2021-01-06 16:02:35,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:02:35,973 INFO L481 AbstractCegarLoop]: Abstraction has 367 states and 457 transitions. [2021-01-06 16:02:35,973 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2021-01-06 16:02:35,973 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 457 transitions. [2021-01-06 16:02:35,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2021-01-06 16:02:35,974 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:02:35,975 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 45, 45, 45, 45, 45, 1, 1, 1, 1, 1, 1] [2021-01-06 16:02:36,190 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-01-06 16:02:36,191 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:02:36,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:02:36,191 INFO L82 PathProgramCache]: Analyzing trace with hash -1161947338, now seen corresponding path program 45 times [2021-01-06 16:02:36,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:02:36,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486789629] [2021-01-06 16:02:36,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:02:36,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:37,685 INFO L134 CoverageAnalysis]: Checked inductivity of 6975 backedges. 0 proven. 6975 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:37,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486789629] [2021-01-06 16:02:37,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198351694] [2021-01-06 16:02:37,686 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:02:38,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2021-01-06 16:02:38,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:02:38,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 1031 conjuncts, 47 conjunts are in the unsatisfiable core [2021-01-06 16:02:38,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:02:38,468 INFO L134 CoverageAnalysis]: Checked inductivity of 6975 backedges. 0 proven. 6975 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:38,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:02:38,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 49 [2021-01-06 16:02:38,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200749907] [2021-01-06 16:02:38,469 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-01-06 16:02:38,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:02:38,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-01-06 16:02:38,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-01-06 16:02:38,471 INFO L87 Difference]: Start difference. First operand 367 states and 457 transitions. Second operand 49 states. [2021-01-06 16:02:38,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:02:38,721 INFO L93 Difference]: Finished difference Result 386 states and 480 transitions. [2021-01-06 16:02:38,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-01-06 16:02:38,721 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 321 [2021-01-06 16:02:38,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:02:38,723 INFO L225 Difference]: With dead ends: 386 [2021-01-06 16:02:38,723 INFO L226 Difference]: Without dead ends: 382 [2021-01-06 16:02:38,724 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 321 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-01-06 16:02:38,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-01-06 16:02:38,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 375. [2021-01-06 16:02:38,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 375 states. [2021-01-06 16:02:38,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 467 transitions. [2021-01-06 16:02:38,730 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 467 transitions. Word has length 321 [2021-01-06 16:02:38,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:02:38,731 INFO L481 AbstractCegarLoop]: Abstraction has 375 states and 467 transitions. [2021-01-06 16:02:38,731 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2021-01-06 16:02:38,731 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 467 transitions. [2021-01-06 16:02:38,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2021-01-06 16:02:38,733 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:02:38,733 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1] [2021-01-06 16:02:38,946 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-01-06 16:02:38,947 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:02:38,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:02:38,947 INFO L82 PathProgramCache]: Analyzing trace with hash -2011136283, now seen corresponding path program 46 times [2021-01-06 16:02:38,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:02:38,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244201352] [2021-01-06 16:02:38,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:02:38,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:40,541 INFO L134 CoverageAnalysis]: Checked inductivity of 7291 backedges. 0 proven. 7291 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:40,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244201352] [2021-01-06 16:02:40,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247277429] [2021-01-06 16:02:40,541 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:02:40,803 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:02:40,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:02:40,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 1053 conjuncts, 48 conjunts are in the unsatisfiable core [2021-01-06 16:02:40,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:02:41,209 INFO L134 CoverageAnalysis]: Checked inductivity of 7291 backedges. 0 proven. 7291 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:41,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:02:41,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 50 [2021-01-06 16:02:41,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941694852] [2021-01-06 16:02:41,210 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-01-06 16:02:41,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:02:41,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-01-06 16:02:41,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2021-01-06 16:02:41,211 INFO L87 Difference]: Start difference. First operand 375 states and 467 transitions. Second operand 50 states. [2021-01-06 16:02:41,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:02:41,509 INFO L93 Difference]: Finished difference Result 394 states and 490 transitions. [2021-01-06 16:02:41,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-01-06 16:02:41,510 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 328 [2021-01-06 16:02:41,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:02:41,511 INFO L225 Difference]: With dead ends: 394 [2021-01-06 16:02:41,511 INFO L226 Difference]: Without dead ends: 390 [2021-01-06 16:02:41,512 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2021-01-06 16:02:41,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-01-06 16:02:41,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 383. [2021-01-06 16:02:41,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 383 states. [2021-01-06 16:02:41,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 477 transitions. [2021-01-06 16:02:41,521 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 477 transitions. Word has length 328 [2021-01-06 16:02:41,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:02:41,522 INFO L481 AbstractCegarLoop]: Abstraction has 383 states and 477 transitions. [2021-01-06 16:02:41,522 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2021-01-06 16:02:41,522 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 477 transitions. [2021-01-06 16:02:41,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2021-01-06 16:02:41,524 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:02:41,525 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 47, 47, 47, 1, 1, 1, 1, 1, 1] [2021-01-06 16:02:41,738 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-01-06 16:02:41,739 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:02:41,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:02:41,739 INFO L82 PathProgramCache]: Analyzing trace with hash -461773738, now seen corresponding path program 47 times [2021-01-06 16:02:41,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:02:41,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996395290] [2021-01-06 16:02:41,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:02:41,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:43,476 INFO L134 CoverageAnalysis]: Checked inductivity of 7614 backedges. 0 proven. 7614 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:43,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996395290] [2021-01-06 16:02:43,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023044073] [2021-01-06 16:02:43,477 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:02:43,841 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2021-01-06 16:02:43,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:02:43,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 1075 conjuncts, 49 conjunts are in the unsatisfiable core [2021-01-06 16:02:43,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:02:44,271 INFO L134 CoverageAnalysis]: Checked inductivity of 7614 backedges. 0 proven. 7614 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:44,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:02:44,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 51 [2021-01-06 16:02:44,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914180099] [2021-01-06 16:02:44,272 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-01-06 16:02:44,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:02:44,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-01-06 16:02:44,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2021-01-06 16:02:44,273 INFO L87 Difference]: Start difference. First operand 383 states and 477 transitions. Second operand 51 states. [2021-01-06 16:02:44,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:02:44,521 INFO L93 Difference]: Finished difference Result 402 states and 500 transitions. [2021-01-06 16:02:44,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-01-06 16:02:44,522 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 335 [2021-01-06 16:02:44,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:02:44,523 INFO L225 Difference]: With dead ends: 402 [2021-01-06 16:02:44,523 INFO L226 Difference]: Without dead ends: 398 [2021-01-06 16:02:44,524 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 335 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2021-01-06 16:02:44,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2021-01-06 16:02:44,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 391. [2021-01-06 16:02:44,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 391 states. [2021-01-06 16:02:44,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 487 transitions. [2021-01-06 16:02:44,531 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 487 transitions. Word has length 335 [2021-01-06 16:02:44,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:02:44,532 INFO L481 AbstractCegarLoop]: Abstraction has 391 states and 487 transitions. [2021-01-06 16:02:44,532 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2021-01-06 16:02:44,532 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 487 transitions. [2021-01-06 16:02:44,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2021-01-06 16:02:44,534 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:02:44,534 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 48, 48, 48, 48, 48, 1, 1, 1, 1, 1, 1] [2021-01-06 16:02:44,749 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:02:44,750 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:02:44,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:02:44,750 INFO L82 PathProgramCache]: Analyzing trace with hash 1394191813, now seen corresponding path program 48 times [2021-01-06 16:02:44,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:02:44,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851432400] [2021-01-06 16:02:44,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:02:44,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:46,538 INFO L134 CoverageAnalysis]: Checked inductivity of 7944 backedges. 0 proven. 7944 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:46,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851432400] [2021-01-06 16:02:46,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046425424] [2021-01-06 16:02:46,538 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:02:46,968 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2021-01-06 16:02:46,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:02:46,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 1097 conjuncts, 50 conjunts are in the unsatisfiable core [2021-01-06 16:02:46,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:02:47,357 INFO L134 CoverageAnalysis]: Checked inductivity of 7944 backedges. 0 proven. 7944 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:47,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:02:47,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 52 [2021-01-06 16:02:47,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484878331] [2021-01-06 16:02:47,358 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-01-06 16:02:47,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:02:47,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-01-06 16:02:47,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2021-01-06 16:02:47,359 INFO L87 Difference]: Start difference. First operand 391 states and 487 transitions. Second operand 52 states. [2021-01-06 16:02:47,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:02:47,752 INFO L93 Difference]: Finished difference Result 410 states and 510 transitions. [2021-01-06 16:02:47,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-01-06 16:02:47,753 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 342 [2021-01-06 16:02:47,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:02:47,754 INFO L225 Difference]: With dead ends: 410 [2021-01-06 16:02:47,755 INFO L226 Difference]: Without dead ends: 406 [2021-01-06 16:02:47,755 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 342 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2021-01-06 16:02:47,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2021-01-06 16:02:47,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 399. [2021-01-06 16:02:47,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 399 states. [2021-01-06 16:02:47,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 497 transitions. [2021-01-06 16:02:47,776 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 497 transitions. Word has length 342 [2021-01-06 16:02:47,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:02:47,777 INFO L481 AbstractCegarLoop]: Abstraction has 399 states and 497 transitions. [2021-01-06 16:02:47,777 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2021-01-06 16:02:47,777 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 497 transitions. [2021-01-06 16:02:47,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2021-01-06 16:02:47,779 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:02:47,779 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 49, 49, 49, 49, 49, 1, 1, 1, 1, 1, 1] [2021-01-06 16:02:47,992 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-01-06 16:02:47,992 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:02:47,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:02:47,993 INFO L82 PathProgramCache]: Analyzing trace with hash -629655178, now seen corresponding path program 49 times [2021-01-06 16:02:47,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:02:47,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143486108] [2021-01-06 16:02:47,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:02:48,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:49,787 INFO L134 CoverageAnalysis]: Checked inductivity of 8281 backedges. 0 proven. 8281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:49,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143486108] [2021-01-06 16:02:49,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071658056] [2021-01-06 16:02:49,787 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:02:50,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:50,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 1119 conjuncts, 51 conjunts are in the unsatisfiable core [2021-01-06 16:02:50,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:02:50,515 INFO L134 CoverageAnalysis]: Checked inductivity of 8281 backedges. 0 proven. 8281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:50,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:02:50,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 53 [2021-01-06 16:02:50,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64571022] [2021-01-06 16:02:50,516 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-01-06 16:02:50,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:02:50,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-01-06 16:02:50,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2021-01-06 16:02:50,517 INFO L87 Difference]: Start difference. First operand 399 states and 497 transitions. Second operand 53 states. [2021-01-06 16:02:50,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:02:50,938 INFO L93 Difference]: Finished difference Result 418 states and 520 transitions. [2021-01-06 16:02:50,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-01-06 16:02:50,938 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 349 [2021-01-06 16:02:50,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:02:50,940 INFO L225 Difference]: With dead ends: 418 [2021-01-06 16:02:50,940 INFO L226 Difference]: Without dead ends: 414 [2021-01-06 16:02:50,941 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 349 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2021-01-06 16:02:50,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-01-06 16:02:50,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 407. [2021-01-06 16:02:50,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 407 states. [2021-01-06 16:02:50,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 507 transitions. [2021-01-06 16:02:50,946 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 507 transitions. Word has length 349 [2021-01-06 16:02:50,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:02:50,946 INFO L481 AbstractCegarLoop]: Abstraction has 407 states and 507 transitions. [2021-01-06 16:02:50,946 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2021-01-06 16:02:50,946 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 507 transitions. [2021-01-06 16:02:50,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2021-01-06 16:02:50,948 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:02:50,948 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 50, 50, 50, 50, 50, 1, 1, 1, 1, 1, 1] [2021-01-06 16:02:51,148 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:02:51,149 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:02:51,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:02:51,150 INFO L82 PathProgramCache]: Analyzing trace with hash 57103525, now seen corresponding path program 50 times [2021-01-06 16:02:51,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:02:51,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348072691] [2021-01-06 16:02:51,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:02:51,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:53,089 INFO L134 CoverageAnalysis]: Checked inductivity of 8625 backedges. 0 proven. 8625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:53,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348072691] [2021-01-06 16:02:53,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683369672] [2021-01-06 16:02:53,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:02:53,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:02:53,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:02:53,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 1141 conjuncts, 52 conjunts are in the unsatisfiable core [2021-01-06 16:02:53,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:02:53,816 INFO L134 CoverageAnalysis]: Checked inductivity of 8625 backedges. 0 proven. 8625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:53,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:02:53,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 54 [2021-01-06 16:02:53,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569820405] [2021-01-06 16:02:53,817 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-01-06 16:02:53,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:02:53,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-01-06 16:02:53,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2021-01-06 16:02:53,818 INFO L87 Difference]: Start difference. First operand 407 states and 507 transitions. Second operand 54 states. [2021-01-06 16:02:54,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:02:54,151 INFO L93 Difference]: Finished difference Result 426 states and 530 transitions. [2021-01-06 16:02:54,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-01-06 16:02:54,151 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 356 [2021-01-06 16:02:54,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:02:54,153 INFO L225 Difference]: With dead ends: 426 [2021-01-06 16:02:54,153 INFO L226 Difference]: Without dead ends: 422 [2021-01-06 16:02:54,154 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 356 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2021-01-06 16:02:54,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2021-01-06 16:02:54,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 415. [2021-01-06 16:02:54,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 415 states. [2021-01-06 16:02:54,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 517 transitions. [2021-01-06 16:02:54,160 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 517 transitions. Word has length 356 [2021-01-06 16:02:54,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:02:54,160 INFO L481 AbstractCegarLoop]: Abstraction has 415 states and 517 transitions. [2021-01-06 16:02:54,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2021-01-06 16:02:54,160 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 517 transitions. [2021-01-06 16:02:54,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2021-01-06 16:02:54,162 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:02:54,163 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 51, 51, 51, 51, 51, 1, 1, 1, 1, 1, 1] [2021-01-06 16:02:54,375 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:02:54,376 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:02:54,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:02:54,376 INFO L82 PathProgramCache]: Analyzing trace with hash -1851058538, now seen corresponding path program 51 times [2021-01-06 16:02:54,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:02:54,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413061996] [2021-01-06 16:02:54,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:02:54,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:56,391 INFO L134 CoverageAnalysis]: Checked inductivity of 8976 backedges. 0 proven. 8976 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:56,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413061996] [2021-01-06 16:02:56,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121993563] [2021-01-06 16:02:56,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:02:56,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2021-01-06 16:02:56,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:02:56,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 1163 conjuncts, 53 conjunts are in the unsatisfiable core [2021-01-06 16:02:56,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:02:57,310 INFO L134 CoverageAnalysis]: Checked inductivity of 8976 backedges. 0 proven. 8976 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:57,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:02:57,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 55 [2021-01-06 16:02:57,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454279316] [2021-01-06 16:02:57,311 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-01-06 16:02:57,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:02:57,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-01-06 16:02:57,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2021-01-06 16:02:57,312 INFO L87 Difference]: Start difference. First operand 415 states and 517 transitions. Second operand 55 states. [2021-01-06 16:02:57,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:02:57,707 INFO L93 Difference]: Finished difference Result 434 states and 540 transitions. [2021-01-06 16:02:57,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-01-06 16:02:57,708 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 363 [2021-01-06 16:02:57,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:02:57,710 INFO L225 Difference]: With dead ends: 434 [2021-01-06 16:02:57,710 INFO L226 Difference]: Without dead ends: 430 [2021-01-06 16:02:57,710 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 363 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2021-01-06 16:02:57,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2021-01-06 16:02:57,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 423. [2021-01-06 16:02:57,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 423 states. [2021-01-06 16:02:57,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 527 transitions. [2021-01-06 16:02:57,717 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 527 transitions. Word has length 363 [2021-01-06 16:02:57,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:02:57,718 INFO L481 AbstractCegarLoop]: Abstraction has 423 states and 527 transitions. [2021-01-06 16:02:57,718 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2021-01-06 16:02:57,718 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 527 transitions. [2021-01-06 16:02:57,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2021-01-06 16:02:57,720 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:02:57,720 INFO L422 BasicCegarLoop]: trace histogram [52, 52, 52, 52, 52, 52, 52, 1, 1, 1, 1, 1, 1] [2021-01-06 16:02:57,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-01-06 16:02:57,935 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:02:57,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:02:57,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1881705595, now seen corresponding path program 52 times [2021-01-06 16:02:57,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:02:57,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806869796] [2021-01-06 16:02:57,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:02:57,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:59,979 INFO L134 CoverageAnalysis]: Checked inductivity of 9334 backedges. 0 proven. 9334 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:59,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806869796] [2021-01-06 16:02:59,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328103994] [2021-01-06 16:02:59,980 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:03:00,301 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:03:00,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:03:00,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 1185 conjuncts, 54 conjunts are in the unsatisfiable core [2021-01-06 16:03:00,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:03:00,801 INFO L134 CoverageAnalysis]: Checked inductivity of 9334 backedges. 0 proven. 9334 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:03:00,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:03:00,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 56 [2021-01-06 16:03:00,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623345778] [2021-01-06 16:03:00,802 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2021-01-06 16:03:00,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:03:00,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-01-06 16:03:00,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2021-01-06 16:03:00,803 INFO L87 Difference]: Start difference. First operand 423 states and 527 transitions. Second operand 56 states. [2021-01-06 16:03:01,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:03:01,144 INFO L93 Difference]: Finished difference Result 442 states and 550 transitions. [2021-01-06 16:03:01,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-01-06 16:03:01,144 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 370 [2021-01-06 16:03:01,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:03:01,146 INFO L225 Difference]: With dead ends: 442 [2021-01-06 16:03:01,146 INFO L226 Difference]: Without dead ends: 438 [2021-01-06 16:03:01,147 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 424 GetRequests, 370 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2021-01-06 16:03:01,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-01-06 16:03:01,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 431. [2021-01-06 16:03:01,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 431 states. [2021-01-06 16:03:01,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 537 transitions. [2021-01-06 16:03:01,152 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 537 transitions. Word has length 370 [2021-01-06 16:03:01,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:03:01,152 INFO L481 AbstractCegarLoop]: Abstraction has 431 states and 537 transitions. [2021-01-06 16:03:01,152 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2021-01-06 16:03:01,152 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 537 transitions. [2021-01-06 16:03:01,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2021-01-06 16:03:01,154 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:03:01,154 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 53, 53, 53, 53, 53, 1, 1, 1, 1, 1, 1] [2021-01-06 16:03:01,354 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:03:01,355 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:03:01,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:03:01,356 INFO L82 PathProgramCache]: Analyzing trace with hash 1870953398, now seen corresponding path program 53 times [2021-01-06 16:03:01,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:03:01,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175354106] [2021-01-06 16:03:01,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:03:01,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:03:03,455 INFO L134 CoverageAnalysis]: Checked inductivity of 9699 backedges. 0 proven. 9699 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:03:03,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175354106] [2021-01-06 16:03:03,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239948658] [2021-01-06 16:03:03,456 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:03:03,897 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2021-01-06 16:03:03,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:03:03,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 1207 conjuncts, 55 conjunts are in the unsatisfiable core [2021-01-06 16:03:03,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:03:04,423 INFO L134 CoverageAnalysis]: Checked inductivity of 9699 backedges. 0 proven. 9699 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:03:04,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:03:04,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 57 [2021-01-06 16:03:04,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809725814] [2021-01-06 16:03:04,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2021-01-06 16:03:04,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:03:04,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-01-06 16:03:04,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2021-01-06 16:03:04,425 INFO L87 Difference]: Start difference. First operand 431 states and 537 transitions. Second operand 57 states. [2021-01-06 16:03:04,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:03:04,832 INFO L93 Difference]: Finished difference Result 450 states and 560 transitions. [2021-01-06 16:03:04,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-01-06 16:03:04,833 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 377 [2021-01-06 16:03:04,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:03:04,835 INFO L225 Difference]: With dead ends: 450 [2021-01-06 16:03:04,835 INFO L226 Difference]: Without dead ends: 446 [2021-01-06 16:03:04,835 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 377 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2021-01-06 16:03:04,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-01-06 16:03:04,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 439. [2021-01-06 16:03:04,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 439 states. [2021-01-06 16:03:04,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 547 transitions. [2021-01-06 16:03:04,840 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 547 transitions. Word has length 377 [2021-01-06 16:03:04,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:03:04,840 INFO L481 AbstractCegarLoop]: Abstraction has 439 states and 547 transitions. [2021-01-06 16:03:04,840 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2021-01-06 16:03:04,840 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 547 transitions. [2021-01-06 16:03:04,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 385 [2021-01-06 16:03:04,842 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:03:04,842 INFO L422 BasicCegarLoop]: trace histogram [54, 54, 54, 54, 54, 54, 54, 1, 1, 1, 1, 1, 1] [2021-01-06 16:03:05,042 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-01-06 16:03:05,043 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:03:05,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:03:05,044 INFO L82 PathProgramCache]: Analyzing trace with hash -289928603, now seen corresponding path program 54 times [2021-01-06 16:03:05,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:03:05,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904163269] [2021-01-06 16:03:05,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:03:05,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:03:07,181 INFO L134 CoverageAnalysis]: Checked inductivity of 10071 backedges. 0 proven. 10071 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:03:07,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904163269] [2021-01-06 16:03:07,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374106624] [2021-01-06 16:03:07,182 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:03:07,664 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2021-01-06 16:03:07,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:03:07,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 1229 conjuncts, 56 conjunts are in the unsatisfiable core [2021-01-06 16:03:07,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:03:08,171 INFO L134 CoverageAnalysis]: Checked inductivity of 10071 backedges. 0 proven. 10071 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:03:08,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:03:08,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 58 [2021-01-06 16:03:08,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398360270] [2021-01-06 16:03:08,172 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2021-01-06 16:03:08,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:03:08,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-01-06 16:03:08,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2021-01-06 16:03:08,173 INFO L87 Difference]: Start difference. First operand 439 states and 547 transitions. Second operand 58 states. [2021-01-06 16:03:08,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:03:08,549 INFO L93 Difference]: Finished difference Result 458 states and 570 transitions. [2021-01-06 16:03:08,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-01-06 16:03:08,549 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 384 [2021-01-06 16:03:08,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:03:08,551 INFO L225 Difference]: With dead ends: 458 [2021-01-06 16:03:08,551 INFO L226 Difference]: Without dead ends: 454 [2021-01-06 16:03:08,552 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 384 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2021-01-06 16:03:08,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-01-06 16:03:08,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 447. [2021-01-06 16:03:08,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 447 states. [2021-01-06 16:03:08,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 557 transitions. [2021-01-06 16:03:08,558 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 557 transitions. Word has length 384 [2021-01-06 16:03:08,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:03:08,558 INFO L481 AbstractCegarLoop]: Abstraction has 447 states and 557 transitions. [2021-01-06 16:03:08,558 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2021-01-06 16:03:08,559 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 557 transitions. [2021-01-06 16:03:08,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 392 [2021-01-06 16:03:08,561 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:03:08,561 INFO L422 BasicCegarLoop]: trace histogram [55, 55, 55, 55, 55, 55, 55, 1, 1, 1, 1, 1, 1] [2021-01-06 16:03:08,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-01-06 16:03:08,768 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:03:08,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:03:08,768 INFO L82 PathProgramCache]: Analyzing trace with hash 1777756374, now seen corresponding path program 55 times [2021-01-06 16:03:08,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:03:08,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714083275] [2021-01-06 16:03:08,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:03:08,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:03:11,063 INFO L134 CoverageAnalysis]: Checked inductivity of 10450 backedges. 0 proven. 10450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:03:11,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714083275] [2021-01-06 16:03:11,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291984264] [2021-01-06 16:03:11,064 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:03:11,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:03:11,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 1251 conjuncts, 57 conjunts are in the unsatisfiable core [2021-01-06 16:03:11,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:03:11,908 INFO L134 CoverageAnalysis]: Checked inductivity of 10450 backedges. 0 proven. 10450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:03:11,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:03:11,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 59 [2021-01-06 16:03:11,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611641991] [2021-01-06 16:03:11,909 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2021-01-06 16:03:11,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:03:11,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-01-06 16:03:11,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2021-01-06 16:03:11,910 INFO L87 Difference]: Start difference. First operand 447 states and 557 transitions. Second operand 59 states. [2021-01-06 16:03:12,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:03:12,456 INFO L93 Difference]: Finished difference Result 466 states and 580 transitions. [2021-01-06 16:03:12,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-01-06 16:03:12,457 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 391 [2021-01-06 16:03:12,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:03:12,459 INFO L225 Difference]: With dead ends: 466 [2021-01-06 16:03:12,459 INFO L226 Difference]: Without dead ends: 462 [2021-01-06 16:03:12,459 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 391 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2021-01-06 16:03:12,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-01-06 16:03:12,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 455. [2021-01-06 16:03:12,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 455 states. [2021-01-06 16:03:12,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 567 transitions. [2021-01-06 16:03:12,464 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 567 transitions. Word has length 391 [2021-01-06 16:03:12,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:03:12,465 INFO L481 AbstractCegarLoop]: Abstraction has 455 states and 567 transitions. [2021-01-06 16:03:12,465 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2021-01-06 16:03:12,465 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 567 transitions. [2021-01-06 16:03:12,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 399 [2021-01-06 16:03:12,467 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:03:12,468 INFO L422 BasicCegarLoop]: trace histogram [56, 56, 56, 56, 56, 56, 56, 1, 1, 1, 1, 1, 1] [2021-01-06 16:03:12,682 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:03:12,683 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:03:12,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:03:12,683 INFO L82 PathProgramCache]: Analyzing trace with hash -170452667, now seen corresponding path program 56 times [2021-01-06 16:03:12,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:03:12,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52166100] [2021-01-06 16:03:12,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:03:12,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:03:15,031 INFO L134 CoverageAnalysis]: Checked inductivity of 10836 backedges. 0 proven. 10836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:03:15,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52166100] [2021-01-06 16:03:15,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296587436] [2021-01-06 16:03:15,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:03:15,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:03:15,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:03:15,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 1273 conjuncts, 58 conjunts are in the unsatisfiable core [2021-01-06 16:03:15,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:03:15,982 INFO L134 CoverageAnalysis]: Checked inductivity of 10836 backedges. 0 proven. 10836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:03:15,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:03:15,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 60 [2021-01-06 16:03:15,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797896101] [2021-01-06 16:03:15,984 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2021-01-06 16:03:15,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:03:15,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-01-06 16:03:15,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2021-01-06 16:03:15,985 INFO L87 Difference]: Start difference. First operand 455 states and 567 transitions. Second operand 60 states. [2021-01-06 16:03:16,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:03:16,449 INFO L93 Difference]: Finished difference Result 474 states and 590 transitions. [2021-01-06 16:03:16,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-01-06 16:03:16,449 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 398 [2021-01-06 16:03:16,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:03:16,451 INFO L225 Difference]: With dead ends: 474 [2021-01-06 16:03:16,451 INFO L226 Difference]: Without dead ends: 470 [2021-01-06 16:03:16,452 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 456 GetRequests, 398 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2021-01-06 16:03:16,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2021-01-06 16:03:16,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 463. [2021-01-06 16:03:16,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 463 states. [2021-01-06 16:03:16,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 577 transitions. [2021-01-06 16:03:16,457 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 577 transitions. Word has length 398 [2021-01-06 16:03:16,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:03:16,458 INFO L481 AbstractCegarLoop]: Abstraction has 463 states and 577 transitions. [2021-01-06 16:03:16,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2021-01-06 16:03:16,458 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 577 transitions. [2021-01-06 16:03:16,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 406 [2021-01-06 16:03:16,460 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:03:16,461 INFO L422 BasicCegarLoop]: trace histogram [57, 57, 57, 57, 57, 57, 57, 1, 1, 1, 1, 1, 1] [2021-01-06 16:03:16,675 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-01-06 16:03:16,676 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:03:16,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:03:16,676 INFO L82 PathProgramCache]: Analyzing trace with hash 661839350, now seen corresponding path program 57 times [2021-01-06 16:03:16,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:03:16,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386700344] [2021-01-06 16:03:16,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:03:16,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:03:19,192 INFO L134 CoverageAnalysis]: Checked inductivity of 11229 backedges. 0 proven. 11229 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:03:19,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386700344] [2021-01-06 16:03:19,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194929152] [2021-01-06 16:03:19,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:03:19,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2021-01-06 16:03:19,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:03:19,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 1295 conjuncts, 59 conjunts are in the unsatisfiable core [2021-01-06 16:03:19,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:03:20,248 INFO L134 CoverageAnalysis]: Checked inductivity of 11229 backedges. 0 proven. 11229 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:03:20,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:03:20,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 61 [2021-01-06 16:03:20,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604937626] [2021-01-06 16:03:20,249 INFO L461 AbstractCegarLoop]: Interpolant automaton has 61 states [2021-01-06 16:03:20,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:03:20,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-01-06 16:03:20,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2021-01-06 16:03:20,250 INFO L87 Difference]: Start difference. First operand 463 states and 577 transitions. Second operand 61 states. [2021-01-06 16:03:20,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:03:20,638 INFO L93 Difference]: Finished difference Result 482 states and 600 transitions. [2021-01-06 16:03:20,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-01-06 16:03:20,639 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 405 [2021-01-06 16:03:20,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:03:20,641 INFO L225 Difference]: With dead ends: 482 [2021-01-06 16:03:20,641 INFO L226 Difference]: Without dead ends: 478 [2021-01-06 16:03:20,641 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 464 GetRequests, 405 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2021-01-06 16:03:20,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2021-01-06 16:03:20,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 471. [2021-01-06 16:03:20,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 471 states. [2021-01-06 16:03:20,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 587 transitions. [2021-01-06 16:03:20,647 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 587 transitions. Word has length 405 [2021-01-06 16:03:20,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:03:20,647 INFO L481 AbstractCegarLoop]: Abstraction has 471 states and 587 transitions. [2021-01-06 16:03:20,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2021-01-06 16:03:20,647 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 587 transitions. [2021-01-06 16:03:20,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 413 [2021-01-06 16:03:20,649 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:03:20,649 INFO L422 BasicCegarLoop]: trace histogram [58, 58, 58, 58, 58, 58, 58, 1, 1, 1, 1, 1, 1] [2021-01-06 16:03:20,859 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:03:20,860 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:03:20,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:03:20,860 INFO L82 PathProgramCache]: Analyzing trace with hash 981639205, now seen corresponding path program 58 times [2021-01-06 16:03:20,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:03:20,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799716381] [2021-01-06 16:03:20,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:03:20,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:03:23,415 INFO L134 CoverageAnalysis]: Checked inductivity of 11629 backedges. 0 proven. 11629 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:03:23,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799716381] [2021-01-06 16:03:23,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923010432] [2021-01-06 16:03:23,416 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:03:23,759 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:03:23,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:03:23,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 1317 conjuncts, 60 conjunts are in the unsatisfiable core [2021-01-06 16:03:23,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:03:24,440 INFO L134 CoverageAnalysis]: Checked inductivity of 11629 backedges. 0 proven. 11629 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:03:24,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:03:24,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 62 [2021-01-06 16:03:24,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529239056] [2021-01-06 16:03:24,441 INFO L461 AbstractCegarLoop]: Interpolant automaton has 62 states [2021-01-06 16:03:24,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:03:24,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-01-06 16:03:24,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2021-01-06 16:03:24,443 INFO L87 Difference]: Start difference. First operand 471 states and 587 transitions. Second operand 62 states. [2021-01-06 16:03:25,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:03:25,152 INFO L93 Difference]: Finished difference Result 490 states and 610 transitions. [2021-01-06 16:03:25,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-01-06 16:03:25,152 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 412 [2021-01-06 16:03:25,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:03:25,154 INFO L225 Difference]: With dead ends: 490 [2021-01-06 16:03:25,154 INFO L226 Difference]: Without dead ends: 486 [2021-01-06 16:03:25,155 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 412 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2021-01-06 16:03:25,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-01-06 16:03:25,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 479. [2021-01-06 16:03:25,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 479 states. [2021-01-06 16:03:25,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 597 transitions. [2021-01-06 16:03:25,161 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 597 transitions. Word has length 412 [2021-01-06 16:03:25,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:03:25,162 INFO L481 AbstractCegarLoop]: Abstraction has 479 states and 597 transitions. [2021-01-06 16:03:25,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2021-01-06 16:03:25,162 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 597 transitions. [2021-01-06 16:03:25,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2021-01-06 16:03:25,164 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:03:25,164 INFO L422 BasicCegarLoop]: trace histogram [59, 59, 59, 59, 59, 59, 59, 1, 1, 1, 1, 1, 1] [2021-01-06 16:03:25,378 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-01-06 16:03:25,379 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:03:25,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:03:25,379 INFO L82 PathProgramCache]: Analyzing trace with hash 518773526, now seen corresponding path program 59 times [2021-01-06 16:03:25,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:03:25,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967942740] [2021-01-06 16:03:25,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:03:25,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:03:28,001 INFO L134 CoverageAnalysis]: Checked inductivity of 12036 backedges. 0 proven. 12036 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:03:28,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967942740] [2021-01-06 16:03:28,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415021159] [2021-01-06 16:03:28,001 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:03:28,516 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2021-01-06 16:03:28,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:03:28,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 1339 conjuncts, 61 conjunts are in the unsatisfiable core [2021-01-06 16:03:28,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:03:29,099 INFO L134 CoverageAnalysis]: Checked inductivity of 12036 backedges. 0 proven. 12036 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:03:29,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:03:29,100 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 63 [2021-01-06 16:03:29,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964335079] [2021-01-06 16:03:29,100 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2021-01-06 16:03:29,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:03:29,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-01-06 16:03:29,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2021-01-06 16:03:29,103 INFO L87 Difference]: Start difference. First operand 479 states and 597 transitions. Second operand 63 states. [2021-01-06 16:03:29,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:03:29,539 INFO L93 Difference]: Finished difference Result 498 states and 620 transitions. [2021-01-06 16:03:29,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-01-06 16:03:29,540 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 419 [2021-01-06 16:03:29,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:03:29,542 INFO L225 Difference]: With dead ends: 498 [2021-01-06 16:03:29,542 INFO L226 Difference]: Without dead ends: 494 [2021-01-06 16:03:29,542 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 480 GetRequests, 419 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2021-01-06 16:03:29,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2021-01-06 16:03:29,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 487. [2021-01-06 16:03:29,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 487 states. [2021-01-06 16:03:29,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 607 transitions. [2021-01-06 16:03:29,548 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 607 transitions. Word has length 419 [2021-01-06 16:03:29,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:03:29,549 INFO L481 AbstractCegarLoop]: Abstraction has 487 states and 607 transitions. [2021-01-06 16:03:29,549 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2021-01-06 16:03:29,549 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 607 transitions. [2021-01-06 16:03:29,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 427 [2021-01-06 16:03:29,550 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:03:29,551 INFO L422 BasicCegarLoop]: trace histogram [60, 60, 60, 60, 60, 60, 60, 1, 1, 1, 1, 1, 1] [2021-01-06 16:03:29,751 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:03:29,751 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:03:29,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:03:29,752 INFO L82 PathProgramCache]: Analyzing trace with hash -242704635, now seen corresponding path program 60 times [2021-01-06 16:03:29,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:03:29,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783933911] [2021-01-06 16:03:29,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:03:29,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:03:32,476 INFO L134 CoverageAnalysis]: Checked inductivity of 12450 backedges. 0 proven. 12450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:03:32,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783933911] [2021-01-06 16:03:32,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069785518] [2021-01-06 16:03:32,477 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:03:33,017 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2021-01-06 16:03:33,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:03:33,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 1361 conjuncts, 62 conjunts are in the unsatisfiable core [2021-01-06 16:03:33,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:03:33,591 INFO L134 CoverageAnalysis]: Checked inductivity of 12450 backedges. 0 proven. 12450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:03:33,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:03:33,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 64 [2021-01-06 16:03:33,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727160766] [2021-01-06 16:03:33,592 INFO L461 AbstractCegarLoop]: Interpolant automaton has 64 states [2021-01-06 16:03:33,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:03:33,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-01-06 16:03:33,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2021-01-06 16:03:33,594 INFO L87 Difference]: Start difference. First operand 487 states and 607 transitions. Second operand 64 states. [2021-01-06 16:03:34,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:03:34,109 INFO L93 Difference]: Finished difference Result 506 states and 630 transitions. [2021-01-06 16:03:34,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-01-06 16:03:34,109 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 426 [2021-01-06 16:03:34,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:03:34,111 INFO L225 Difference]: With dead ends: 506 [2021-01-06 16:03:34,112 INFO L226 Difference]: Without dead ends: 502 [2021-01-06 16:03:34,112 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 426 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2021-01-06 16:03:34,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2021-01-06 16:03:34,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 495. [2021-01-06 16:03:34,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 495 states. [2021-01-06 16:03:34,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 617 transitions. [2021-01-06 16:03:34,118 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 617 transitions. Word has length 426 [2021-01-06 16:03:34,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:03:34,118 INFO L481 AbstractCegarLoop]: Abstraction has 495 states and 617 transitions. [2021-01-06 16:03:34,119 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2021-01-06 16:03:34,119 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 617 transitions. [2021-01-06 16:03:34,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2021-01-06 16:03:34,121 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:03:34,121 INFO L422 BasicCegarLoop]: trace histogram [61, 61, 61, 61, 61, 61, 61, 1, 1, 1, 1, 1, 1] [2021-01-06 16:03:34,336 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-01-06 16:03:34,337 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:03:34,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:03:34,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1210884042, now seen corresponding path program 61 times [2021-01-06 16:03:34,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:03:34,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063794616] [2021-01-06 16:03:34,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:03:34,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:03:37,142 INFO L134 CoverageAnalysis]: Checked inductivity of 12871 backedges. 0 proven. 12871 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:03:37,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063794616] [2021-01-06 16:03:37,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512892970] [2021-01-06 16:03:37,143 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:03:37,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:03:37,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 1383 conjuncts, 63 conjunts are in the unsatisfiable core [2021-01-06 16:03:37,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:03:38,085 INFO L134 CoverageAnalysis]: Checked inductivity of 12871 backedges. 0 proven. 12871 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:03:38,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:03:38,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 65 [2021-01-06 16:03:38,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567949191] [2021-01-06 16:03:38,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 65 states [2021-01-06 16:03:38,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:03:38,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-01-06 16:03:38,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2021-01-06 16:03:38,087 INFO L87 Difference]: Start difference. First operand 495 states and 617 transitions. Second operand 65 states. [2021-01-06 16:03:38,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:03:38,610 INFO L93 Difference]: Finished difference Result 514 states and 640 transitions. [2021-01-06 16:03:38,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-01-06 16:03:38,611 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 433 [2021-01-06 16:03:38,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:03:38,613 INFO L225 Difference]: With dead ends: 514 [2021-01-06 16:03:38,613 INFO L226 Difference]: Without dead ends: 510 [2021-01-06 16:03:38,613 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 496 GetRequests, 433 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2021-01-06 16:03:38,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-01-06 16:03:38,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 503. [2021-01-06 16:03:38,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 503 states. [2021-01-06 16:03:38,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 627 transitions. [2021-01-06 16:03:38,618 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 627 transitions. Word has length 433 [2021-01-06 16:03:38,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:03:38,618 INFO L481 AbstractCegarLoop]: Abstraction has 503 states and 627 transitions. [2021-01-06 16:03:38,618 INFO L482 AbstractCegarLoop]: Interpolant automaton has 65 states. [2021-01-06 16:03:38,618 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 627 transitions. [2021-01-06 16:03:38,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 441 [2021-01-06 16:03:38,620 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:03:38,620 INFO L422 BasicCegarLoop]: trace histogram [62, 62, 62, 62, 62, 62, 62, 1, 1, 1, 1, 1, 1] [2021-01-06 16:03:38,821 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:03:38,821 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:03:38,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:03:38,822 INFO L82 PathProgramCache]: Analyzing trace with hash -818473499, now seen corresponding path program 62 times [2021-01-06 16:03:38,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:03:38,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876407677] [2021-01-06 16:03:38,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:03:38,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:03:41,702 INFO L134 CoverageAnalysis]: Checked inductivity of 13299 backedges. 0 proven. 13299 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:03:41,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876407677] [2021-01-06 16:03:41,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220104281] [2021-01-06 16:03:41,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:03:42,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:03:42,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:03:42,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 1405 conjuncts, 64 conjunts are in the unsatisfiable core [2021-01-06 16:03:42,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:03:42,726 INFO L134 CoverageAnalysis]: Checked inductivity of 13299 backedges. 0 proven. 13299 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:03:42,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:03:42,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 66 [2021-01-06 16:03:42,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227879910] [2021-01-06 16:03:42,728 INFO L461 AbstractCegarLoop]: Interpolant automaton has 66 states [2021-01-06 16:03:42,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:03:42,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-01-06 16:03:42,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2021-01-06 16:03:42,729 INFO L87 Difference]: Start difference. First operand 503 states and 627 transitions. Second operand 66 states. [2021-01-06 16:03:43,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:03:43,404 INFO L93 Difference]: Finished difference Result 522 states and 650 transitions. [2021-01-06 16:03:43,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-01-06 16:03:43,405 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 440 [2021-01-06 16:03:43,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:03:43,407 INFO L225 Difference]: With dead ends: 522 [2021-01-06 16:03:43,407 INFO L226 Difference]: Without dead ends: 518 [2021-01-06 16:03:43,408 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 504 GetRequests, 440 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2021-01-06 16:03:43,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-01-06 16:03:43,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 511. [2021-01-06 16:03:43,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 511 states. [2021-01-06 16:03:43,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 637 transitions. [2021-01-06 16:03:43,414 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 637 transitions. Word has length 440 [2021-01-06 16:03:43,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:03:43,415 INFO L481 AbstractCegarLoop]: Abstraction has 511 states and 637 transitions. [2021-01-06 16:03:43,415 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2021-01-06 16:03:43,415 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 637 transitions. [2021-01-06 16:03:43,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 448 [2021-01-06 16:03:43,418 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:03:43,418 INFO L422 BasicCegarLoop]: trace histogram [63, 63, 63, 63, 63, 63, 63, 1, 1, 1, 1, 1, 1] [2021-01-06 16:03:43,630 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-01-06 16:03:43,631 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:03:43,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:03:43,631 INFO L82 PathProgramCache]: Analyzing trace with hash 1780182358, now seen corresponding path program 63 times [2021-01-06 16:03:43,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:03:43,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373340129] [2021-01-06 16:03:43,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:03:43,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:03:46,694 INFO L134 CoverageAnalysis]: Checked inductivity of 13734 backedges. 0 proven. 13734 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:03:46,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373340129] [2021-01-06 16:03:46,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469369664] [2021-01-06 16:03:46,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:03:47,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2021-01-06 16:03:47,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:03:47,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 1427 conjuncts, 65 conjunts are in the unsatisfiable core [2021-01-06 16:03:47,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:03:47,914 INFO L134 CoverageAnalysis]: Checked inductivity of 13734 backedges. 0 proven. 13734 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:03:47,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:03:47,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 67 [2021-01-06 16:03:47,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345947317] [2021-01-06 16:03:47,916 INFO L461 AbstractCegarLoop]: Interpolant automaton has 67 states [2021-01-06 16:03:47,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:03:47,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-01-06 16:03:47,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2021-01-06 16:03:47,917 INFO L87 Difference]: Start difference. First operand 511 states and 637 transitions. Second operand 67 states. [2021-01-06 16:03:48,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:03:48,563 INFO L93 Difference]: Finished difference Result 530 states and 660 transitions. [2021-01-06 16:03:48,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-01-06 16:03:48,564 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 447 [2021-01-06 16:03:48,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:03:48,566 INFO L225 Difference]: With dead ends: 530 [2021-01-06 16:03:48,566 INFO L226 Difference]: Without dead ends: 526 [2021-01-06 16:03:48,566 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 512 GetRequests, 447 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2021-01-06 16:03:48,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2021-01-06 16:03:48,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 519. [2021-01-06 16:03:48,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 519 states. [2021-01-06 16:03:48,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 647 transitions. [2021-01-06 16:03:48,571 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 647 transitions. Word has length 447 [2021-01-06 16:03:48,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:03:48,572 INFO L481 AbstractCegarLoop]: Abstraction has 519 states and 647 transitions. [2021-01-06 16:03:48,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has 67 states. [2021-01-06 16:03:48,572 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 647 transitions. [2021-01-06 16:03:48,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 455 [2021-01-06 16:03:48,574 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:03:48,574 INFO L422 BasicCegarLoop]: trace histogram [64, 64, 64, 64, 64, 64, 64, 1, 1, 1, 1, 1, 1] [2021-01-06 16:03:48,788 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:03:48,789 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:03:48,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:03:48,789 INFO L82 PathProgramCache]: Analyzing trace with hash -413399867, now seen corresponding path program 64 times [2021-01-06 16:03:48,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:03:48,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997383143] [2021-01-06 16:03:48,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:03:48,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:03:51,956 INFO L134 CoverageAnalysis]: Checked inductivity of 14176 backedges. 0 proven. 14176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:03:51,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997383143] [2021-01-06 16:03:51,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024044949] [2021-01-06 16:03:51,957 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:03:52,311 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:03:52,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:03:52,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 1449 conjuncts, 66 conjunts are in the unsatisfiable core [2021-01-06 16:03:52,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:03:52,965 INFO L134 CoverageAnalysis]: Checked inductivity of 14176 backedges. 0 proven. 14176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:03:52,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:03:52,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 68 [2021-01-06 16:03:52,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125083143] [2021-01-06 16:03:52,967 INFO L461 AbstractCegarLoop]: Interpolant automaton has 68 states [2021-01-06 16:03:52,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:03:52,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-01-06 16:03:52,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2021-01-06 16:03:52,967 INFO L87 Difference]: Start difference. First operand 519 states and 647 transitions. Second operand 68 states. [2021-01-06 16:03:53,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:03:53,764 INFO L93 Difference]: Finished difference Result 538 states and 670 transitions. [2021-01-06 16:03:53,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-01-06 16:03:53,765 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 454 [2021-01-06 16:03:53,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:03:53,767 INFO L225 Difference]: With dead ends: 538 [2021-01-06 16:03:53,768 INFO L226 Difference]: Without dead ends: 534 [2021-01-06 16:03:53,768 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 520 GetRequests, 454 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2021-01-06 16:03:53,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-01-06 16:03:53,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 527. [2021-01-06 16:03:53,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 527 states. [2021-01-06 16:03:53,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 657 transitions. [2021-01-06 16:03:53,774 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 657 transitions. Word has length 454 [2021-01-06 16:03:53,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:03:53,774 INFO L481 AbstractCegarLoop]: Abstraction has 527 states and 657 transitions. [2021-01-06 16:03:53,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2021-01-06 16:03:53,774 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 657 transitions. [2021-01-06 16:03:53,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 462 [2021-01-06 16:03:53,776 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:03:53,776 INFO L422 BasicCegarLoop]: trace histogram [65, 65, 65, 65, 65, 65, 65, 1, 1, 1, 1, 1, 1] [2021-01-06 16:03:53,977 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-01-06 16:03:53,977 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:03:53,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:03:53,978 INFO L82 PathProgramCache]: Analyzing trace with hash -566885770, now seen corresponding path program 65 times [2021-01-06 16:03:53,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:03:53,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832135235] [2021-01-06 16:03:53,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:03:54,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:03:57,264 INFO L134 CoverageAnalysis]: Checked inductivity of 14625 backedges. 0 proven. 14625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:03:57,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832135235] [2021-01-06 16:03:57,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685834538] [2021-01-06 16:03:57,264 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:03:57,845 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2021-01-06 16:03:57,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:03:57,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 1471 conjuncts, 67 conjunts are in the unsatisfiable core [2021-01-06 16:03:57,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:03:58,536 INFO L134 CoverageAnalysis]: Checked inductivity of 14625 backedges. 0 proven. 14625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:03:58,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:03:58,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 69 [2021-01-06 16:03:58,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636240419] [2021-01-06 16:03:58,537 INFO L461 AbstractCegarLoop]: Interpolant automaton has 69 states [2021-01-06 16:03:58,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:03:58,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-01-06 16:03:58,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2021-01-06 16:03:58,538 INFO L87 Difference]: Start difference. First operand 527 states and 657 transitions. Second operand 69 states. [2021-01-06 16:03:59,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:03:59,404 INFO L93 Difference]: Finished difference Result 546 states and 680 transitions. [2021-01-06 16:03:59,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-01-06 16:03:59,405 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 461 [2021-01-06 16:03:59,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:03:59,407 INFO L225 Difference]: With dead ends: 546 [2021-01-06 16:03:59,407 INFO L226 Difference]: Without dead ends: 542 [2021-01-06 16:03:59,408 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 528 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2021-01-06 16:03:59,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-01-06 16:03:59,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 535. [2021-01-06 16:03:59,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 535 states. [2021-01-06 16:03:59,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 667 transitions. [2021-01-06 16:03:59,413 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 667 transitions. Word has length 461 [2021-01-06 16:03:59,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:03:59,413 INFO L481 AbstractCegarLoop]: Abstraction has 535 states and 667 transitions. [2021-01-06 16:03:59,413 INFO L482 AbstractCegarLoop]: Interpolant automaton has 69 states. [2021-01-06 16:03:59,413 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 667 transitions. [2021-01-06 16:03:59,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 469 [2021-01-06 16:03:59,415 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:03:59,415 INFO L422 BasicCegarLoop]: trace histogram [66, 66, 66, 66, 66, 66, 66, 1, 1, 1, 1, 1, 1] [2021-01-06 16:03:59,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-01-06 16:03:59,616 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:03:59,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:03:59,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1924830299, now seen corresponding path program 66 times [2021-01-06 16:03:59,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:03:59,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291538783] [2021-01-06 16:03:59,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:03:59,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:04:03,014 INFO L134 CoverageAnalysis]: Checked inductivity of 15081 backedges. 0 proven. 15081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:04:03,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291538783] [2021-01-06 16:04:03,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794045667] [2021-01-06 16:04:03,015 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:04:03,654 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2021-01-06 16:04:03,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:04:03,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 1493 conjuncts, 68 conjunts are in the unsatisfiable core [2021-01-06 16:04:03,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:04:04,315 INFO L134 CoverageAnalysis]: Checked inductivity of 15081 backedges. 0 proven. 15081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:04:04,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:04:04,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 70 [2021-01-06 16:04:04,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92095562] [2021-01-06 16:04:04,316 INFO L461 AbstractCegarLoop]: Interpolant automaton has 70 states [2021-01-06 16:04:04,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:04:04,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-01-06 16:04:04,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2021-01-06 16:04:04,317 INFO L87 Difference]: Start difference. First operand 535 states and 667 transitions. Second operand 70 states. [2021-01-06 16:04:04,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:04:04,914 INFO L93 Difference]: Finished difference Result 554 states and 690 transitions. [2021-01-06 16:04:04,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-01-06 16:04:04,914 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 468 [2021-01-06 16:04:04,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:04:04,917 INFO L225 Difference]: With dead ends: 554 [2021-01-06 16:04:04,917 INFO L226 Difference]: Without dead ends: 550 [2021-01-06 16:04:04,917 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 536 GetRequests, 468 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2021-01-06 16:04:04,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-01-06 16:04:04,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 543. [2021-01-06 16:04:04,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 543 states. [2021-01-06 16:04:04,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 677 transitions. [2021-01-06 16:04:04,925 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 677 transitions. Word has length 468 [2021-01-06 16:04:04,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:04:04,925 INFO L481 AbstractCegarLoop]: Abstraction has 543 states and 677 transitions. [2021-01-06 16:04:04,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2021-01-06 16:04:04,926 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 677 transitions. [2021-01-06 16:04:04,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2021-01-06 16:04:04,928 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:04:04,928 INFO L422 BasicCegarLoop]: trace histogram [67, 67, 67, 67, 67, 67, 67, 1, 1, 1, 1, 1, 1] [2021-01-06 16:04:05,129 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-01-06 16:04:05,129 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:04:05,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:04:05,130 INFO L82 PathProgramCache]: Analyzing trace with hash 219488150, now seen corresponding path program 67 times [2021-01-06 16:04:05,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:04:05,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949877927] [2021-01-06 16:04:05,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:04:05,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:04:08,564 INFO L134 CoverageAnalysis]: Checked inductivity of 15544 backedges. 0 proven. 15544 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:04:08,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949877927] [2021-01-06 16:04:08,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405597809] [2021-01-06 16:04:08,564 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:04:08,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:04:08,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 1515 conjuncts, 69 conjunts are in the unsatisfiable core [2021-01-06 16:04:08,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:04:09,661 INFO L134 CoverageAnalysis]: Checked inductivity of 15544 backedges. 0 proven. 15544 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:04:09,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:04:09,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 71 [2021-01-06 16:04:09,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121755280] [2021-01-06 16:04:09,662 INFO L461 AbstractCegarLoop]: Interpolant automaton has 71 states [2021-01-06 16:04:09,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:04:09,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-01-06 16:04:09,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2021-01-06 16:04:09,663 INFO L87 Difference]: Start difference. First operand 543 states and 677 transitions. Second operand 71 states. [2021-01-06 16:04:10,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:04:10,482 INFO L93 Difference]: Finished difference Result 562 states and 700 transitions. [2021-01-06 16:04:10,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-01-06 16:04:10,483 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 475 [2021-01-06 16:04:10,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:04:10,485 INFO L225 Difference]: With dead ends: 562 [2021-01-06 16:04:10,485 INFO L226 Difference]: Without dead ends: 558 [2021-01-06 16:04:10,486 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 544 GetRequests, 475 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2021-01-06 16:04:10,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2021-01-06 16:04:10,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 551. [2021-01-06 16:04:10,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 551 states. [2021-01-06 16:04:10,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 551 states to 551 states and 687 transitions. [2021-01-06 16:04:10,491 INFO L78 Accepts]: Start accepts. Automaton has 551 states and 687 transitions. Word has length 475 [2021-01-06 16:04:10,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:04:10,491 INFO L481 AbstractCegarLoop]: Abstraction has 551 states and 687 transitions. [2021-01-06 16:04:10,491 INFO L482 AbstractCegarLoop]: Interpolant automaton has 71 states. [2021-01-06 16:04:10,492 INFO L276 IsEmpty]: Start isEmpty. Operand 551 states and 687 transitions. [2021-01-06 16:04:10,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2021-01-06 16:04:10,493 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:04:10,494 INFO L422 BasicCegarLoop]: trace histogram [68, 68, 68, 68, 68, 68, 68, 1, 1, 1, 1, 1, 1] [2021-01-06 16:04:10,694 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:04:10,694 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:04:10,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:04:10,695 INFO L82 PathProgramCache]: Analyzing trace with hash 868305541, now seen corresponding path program 68 times [2021-01-06 16:04:10,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:04:10,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644451683] [2021-01-06 16:04:10,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:04:10,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:04:14,234 INFO L134 CoverageAnalysis]: Checked inductivity of 16014 backedges. 0 proven. 16014 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:04:14,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644451683] [2021-01-06 16:04:14,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084605320] [2021-01-06 16:04:14,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:04:14,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:04:14,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:04:14,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 1537 conjuncts, 70 conjunts are in the unsatisfiable core [2021-01-06 16:04:14,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:04:15,337 INFO L134 CoverageAnalysis]: Checked inductivity of 16014 backedges. 0 proven. 16014 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:04:15,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:04:15,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 72 [2021-01-06 16:04:15,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614973053] [2021-01-06 16:04:15,338 INFO L461 AbstractCegarLoop]: Interpolant automaton has 72 states [2021-01-06 16:04:15,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:04:15,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-01-06 16:04:15,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2021-01-06 16:04:15,339 INFO L87 Difference]: Start difference. First operand 551 states and 687 transitions. Second operand 72 states. [2021-01-06 16:04:16,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:04:16,214 INFO L93 Difference]: Finished difference Result 570 states and 710 transitions. [2021-01-06 16:04:16,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-01-06 16:04:16,214 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 482 [2021-01-06 16:04:16,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:04:16,216 INFO L225 Difference]: With dead ends: 570 [2021-01-06 16:04:16,216 INFO L226 Difference]: Without dead ends: 566 [2021-01-06 16:04:16,217 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 552 GetRequests, 482 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2021-01-06 16:04:16,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-01-06 16:04:16,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 559. [2021-01-06 16:04:16,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 559 states. [2021-01-06 16:04:16,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 697 transitions. [2021-01-06 16:04:16,223 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 697 transitions. Word has length 482 [2021-01-06 16:04:16,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:04:16,223 INFO L481 AbstractCegarLoop]: Abstraction has 559 states and 697 transitions. [2021-01-06 16:04:16,223 INFO L482 AbstractCegarLoop]: Interpolant automaton has 72 states. [2021-01-06 16:04:16,223 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 697 transitions. [2021-01-06 16:04:16,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2021-01-06 16:04:16,225 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:04:16,225 INFO L422 BasicCegarLoop]: trace histogram [69, 69, 69, 69, 69, 69, 69, 1, 1, 1, 1, 1, 1] [2021-01-06 16:04:16,426 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-01-06 16:04:16,426 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:04:16,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:04:16,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1613415606, now seen corresponding path program 69 times [2021-01-06 16:04:16,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:04:16,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420767235] [2021-01-06 16:04:16,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:04:16,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:04:20,034 INFO L134 CoverageAnalysis]: Checked inductivity of 16491 backedges. 0 proven. 16491 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:04:20,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420767235] [2021-01-06 16:04:20,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461027678] [2021-01-06 16:04:20,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:04:20,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2021-01-06 16:04:20,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:04:20,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 1559 conjuncts, 71 conjunts are in the unsatisfiable core [2021-01-06 16:04:20,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:04:21,440 INFO L134 CoverageAnalysis]: Checked inductivity of 16491 backedges. 0 proven. 16491 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:04:21,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:04:21,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 73 [2021-01-06 16:04:21,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035693101] [2021-01-06 16:04:21,442 INFO L461 AbstractCegarLoop]: Interpolant automaton has 73 states [2021-01-06 16:04:21,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:04:21,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-01-06 16:04:21,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2021-01-06 16:04:21,444 INFO L87 Difference]: Start difference. First operand 559 states and 697 transitions. Second operand 73 states. [2021-01-06 16:04:22,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:04:22,500 INFO L93 Difference]: Finished difference Result 578 states and 720 transitions. [2021-01-06 16:04:22,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-01-06 16:04:22,500 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 489 [2021-01-06 16:04:22,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:04:22,503 INFO L225 Difference]: With dead ends: 578 [2021-01-06 16:04:22,503 INFO L226 Difference]: Without dead ends: 574 [2021-01-06 16:04:22,503 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 560 GetRequests, 489 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2021-01-06 16:04:22,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2021-01-06 16:04:22,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 567. [2021-01-06 16:04:22,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 567 states. [2021-01-06 16:04:22,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 707 transitions. [2021-01-06 16:04:22,511 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 707 transitions. Word has length 489 [2021-01-06 16:04:22,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:04:22,512 INFO L481 AbstractCegarLoop]: Abstraction has 567 states and 707 transitions. [2021-01-06 16:04:22,512 INFO L482 AbstractCegarLoop]: Interpolant automaton has 73 states. [2021-01-06 16:04:22,512 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 707 transitions. [2021-01-06 16:04:22,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2021-01-06 16:04:22,515 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:04:22,515 INFO L422 BasicCegarLoop]: trace histogram [70, 70, 70, 70, 70, 70, 70, 1, 1, 1, 1, 1, 1] [2021-01-06 16:04:22,722 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:04:22,723 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:04:22,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:04:22,724 INFO L82 PathProgramCache]: Analyzing trace with hash 1293787493, now seen corresponding path program 70 times [2021-01-06 16:04:22,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:04:22,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043157343] [2021-01-06 16:04:22,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:04:22,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:04:26,531 INFO L134 CoverageAnalysis]: Checked inductivity of 16975 backedges. 0 proven. 16975 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:04:26,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043157343] [2021-01-06 16:04:26,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994321458] [2021-01-06 16:04:26,532 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:04:26,917 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:04:26,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:04:26,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 1581 conjuncts, 72 conjunts are in the unsatisfiable core [2021-01-06 16:04:26,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:04:27,649 INFO L134 CoverageAnalysis]: Checked inductivity of 16975 backedges. 0 proven. 16975 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:04:27,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:04:27,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 74 [2021-01-06 16:04:27,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402238862] [2021-01-06 16:04:27,650 INFO L461 AbstractCegarLoop]: Interpolant automaton has 74 states [2021-01-06 16:04:27,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:04:27,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-01-06 16:04:27,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2021-01-06 16:04:27,651 INFO L87 Difference]: Start difference. First operand 567 states and 707 transitions. Second operand 74 states. [2021-01-06 16:04:28,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:04:28,681 INFO L93 Difference]: Finished difference Result 586 states and 730 transitions. [2021-01-06 16:04:28,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-01-06 16:04:28,682 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 496 [2021-01-06 16:04:28,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:04:28,684 INFO L225 Difference]: With dead ends: 586 [2021-01-06 16:04:28,684 INFO L226 Difference]: Without dead ends: 582 [2021-01-06 16:04:28,685 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 568 GetRequests, 496 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2021-01-06 16:04:28,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2021-01-06 16:04:28,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 575. [2021-01-06 16:04:28,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 575 states. [2021-01-06 16:04:28,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 717 transitions. [2021-01-06 16:04:28,690 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 717 transitions. Word has length 496 [2021-01-06 16:04:28,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:04:28,690 INFO L481 AbstractCegarLoop]: Abstraction has 575 states and 717 transitions. [2021-01-06 16:04:28,690 INFO L482 AbstractCegarLoop]: Interpolant automaton has 74 states. [2021-01-06 16:04:28,690 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 717 transitions. [2021-01-06 16:04:28,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 504 [2021-01-06 16:04:28,692 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:04:28,693 INFO L422 BasicCegarLoop]: trace histogram [71, 71, 71, 71, 71, 71, 71, 1, 1, 1, 1, 1, 1] [2021-01-06 16:04:28,893 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2021-01-06 16:04:28,894 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:04:28,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:04:28,895 INFO L82 PathProgramCache]: Analyzing trace with hash -781651498, now seen corresponding path program 71 times [2021-01-06 16:04:28,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:04:28,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027343411] [2021-01-06 16:04:28,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:04:28,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:04:32,735 INFO L134 CoverageAnalysis]: Checked inductivity of 17466 backedges. 0 proven. 17466 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:04:32,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027343411] [2021-01-06 16:04:32,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511890347] [2021-01-06 16:04:32,736 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:04:33,394 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2021-01-06 16:04:33,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:04:33,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 1603 conjuncts, 73 conjunts are in the unsatisfiable core [2021-01-06 16:04:33,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:04:34,119 INFO L134 CoverageAnalysis]: Checked inductivity of 17466 backedges. 0 proven. 17466 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:04:34,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:04:34,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 75 [2021-01-06 16:04:34,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118605039] [2021-01-06 16:04:34,120 INFO L461 AbstractCegarLoop]: Interpolant automaton has 75 states [2021-01-06 16:04:34,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:04:34,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-01-06 16:04:34,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2021-01-06 16:04:34,121 INFO L87 Difference]: Start difference. First operand 575 states and 717 transitions. Second operand 75 states. [2021-01-06 16:04:34,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:04:34,982 INFO L93 Difference]: Finished difference Result 594 states and 740 transitions. [2021-01-06 16:04:34,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-01-06 16:04:34,983 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 503 [2021-01-06 16:04:34,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:04:34,985 INFO L225 Difference]: With dead ends: 594 [2021-01-06 16:04:34,985 INFO L226 Difference]: Without dead ends: 590 [2021-01-06 16:04:34,986 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 576 GetRequests, 503 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2021-01-06 16:04:34,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2021-01-06 16:04:34,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 583. [2021-01-06 16:04:34,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 583 states. [2021-01-06 16:04:34,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 727 transitions. [2021-01-06 16:04:34,991 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 727 transitions. Word has length 503 [2021-01-06 16:04:34,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:04:34,992 INFO L481 AbstractCegarLoop]: Abstraction has 583 states and 727 transitions. [2021-01-06 16:04:34,992 INFO L482 AbstractCegarLoop]: Interpolant automaton has 75 states. [2021-01-06 16:04:34,992 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 727 transitions. [2021-01-06 16:04:34,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 511 [2021-01-06 16:04:34,994 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:04:34,994 INFO L422 BasicCegarLoop]: trace histogram [72, 72, 72, 72, 72, 72, 72, 1, 1, 1, 1, 1, 1] [2021-01-06 16:04:35,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:04:35,208 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:04:35,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:04:35,209 INFO L82 PathProgramCache]: Analyzing trace with hash 724070469, now seen corresponding path program 72 times [2021-01-06 16:04:35,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:04:35,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489070501] [2021-01-06 16:04:35,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:04:35,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:04:39,272 INFO L134 CoverageAnalysis]: Checked inductivity of 17964 backedges. 0 proven. 17964 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:04:39,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489070501] [2021-01-06 16:04:39,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504186100] [2021-01-06 16:04:39,273 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:04:39,974 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2021-01-06 16:04:39,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:04:39,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 1625 conjuncts, 74 conjunts are in the unsatisfiable core [2021-01-06 16:04:39,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:04:40,721 INFO L134 CoverageAnalysis]: Checked inductivity of 17964 backedges. 0 proven. 17964 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:04:40,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:04:40,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 76 [2021-01-06 16:04:40,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126547783] [2021-01-06 16:04:40,722 INFO L461 AbstractCegarLoop]: Interpolant automaton has 76 states [2021-01-06 16:04:40,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:04:40,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-01-06 16:04:40,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2021-01-06 16:04:40,723 INFO L87 Difference]: Start difference. First operand 583 states and 727 transitions. Second operand 76 states. [2021-01-06 16:04:42,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:04:42,072 INFO L93 Difference]: Finished difference Result 602 states and 750 transitions. [2021-01-06 16:04:42,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-01-06 16:04:42,073 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 510 [2021-01-06 16:04:42,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:04:42,075 INFO L225 Difference]: With dead ends: 602 [2021-01-06 16:04:42,075 INFO L226 Difference]: Without dead ends: 598 [2021-01-06 16:04:42,076 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 584 GetRequests, 510 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2021-01-06 16:04:42,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2021-01-06 16:04:42,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 591. [2021-01-06 16:04:42,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 591 states. [2021-01-06 16:04:42,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 737 transitions. [2021-01-06 16:04:42,082 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 737 transitions. Word has length 510 [2021-01-06 16:04:42,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:04:42,082 INFO L481 AbstractCegarLoop]: Abstraction has 591 states and 737 transitions. [2021-01-06 16:04:42,082 INFO L482 AbstractCegarLoop]: Interpolant automaton has 76 states. [2021-01-06 16:04:42,082 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 737 transitions. [2021-01-06 16:04:42,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 518 [2021-01-06 16:04:42,084 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:04:42,084 INFO L422 BasicCegarLoop]: trace histogram [73, 73, 73, 73, 73, 73, 73, 1, 1, 1, 1, 1, 1] [2021-01-06 16:04:42,285 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:04:42,285 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:04:42,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:04:42,286 INFO L82 PathProgramCache]: Analyzing trace with hash 188851958, now seen corresponding path program 73 times [2021-01-06 16:04:42,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:04:42,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074403841] [2021-01-06 16:04:42,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:04:42,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:04:46,455 INFO L134 CoverageAnalysis]: Checked inductivity of 18469 backedges. 0 proven. 18469 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:04:46,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074403841] [2021-01-06 16:04:46,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699093539] [2021-01-06 16:04:46,455 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:04:46,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:04:46,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 1647 conjuncts, 75 conjunts are in the unsatisfiable core [2021-01-06 16:04:46,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:04:47,604 INFO L134 CoverageAnalysis]: Checked inductivity of 18469 backedges. 0 proven. 18469 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:04:47,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:04:47,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 77 [2021-01-06 16:04:47,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979537334] [2021-01-06 16:04:47,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 77 states [2021-01-06 16:04:47,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:04:47,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-01-06 16:04:47,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2021-01-06 16:04:47,606 INFO L87 Difference]: Start difference. First operand 591 states and 737 transitions. Second operand 77 states. [2021-01-06 16:04:48,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:04:48,785 INFO L93 Difference]: Finished difference Result 610 states and 760 transitions. [2021-01-06 16:04:48,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-01-06 16:04:48,786 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 517 [2021-01-06 16:04:48,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:04:48,788 INFO L225 Difference]: With dead ends: 610 [2021-01-06 16:04:48,788 INFO L226 Difference]: Without dead ends: 606 [2021-01-06 16:04:48,789 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 592 GetRequests, 517 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2021-01-06 16:04:48,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2021-01-06 16:04:48,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 599. [2021-01-06 16:04:48,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 599 states. [2021-01-06 16:04:48,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 747 transitions. [2021-01-06 16:04:48,794 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 747 transitions. Word has length 517 [2021-01-06 16:04:48,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:04:48,795 INFO L481 AbstractCegarLoop]: Abstraction has 599 states and 747 transitions. [2021-01-06 16:04:48,795 INFO L482 AbstractCegarLoop]: Interpolant automaton has 77 states. [2021-01-06 16:04:48,795 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 747 transitions. [2021-01-06 16:04:48,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 525 [2021-01-06 16:04:48,797 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:04:48,797 INFO L422 BasicCegarLoop]: trace histogram [74, 74, 74, 74, 74, 74, 74, 1, 1, 1, 1, 1, 1] [2021-01-06 16:04:48,998 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:04:48,998 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:04:48,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:04:48,999 INFO L82 PathProgramCache]: Analyzing trace with hash -550521051, now seen corresponding path program 74 times [2021-01-06 16:04:48,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:04:48,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771721461] [2021-01-06 16:04:49,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:04:49,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:04:53,502 INFO L134 CoverageAnalysis]: Checked inductivity of 18981 backedges. 0 proven. 18981 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:04:53,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771721461] [2021-01-06 16:04:53,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860018262] [2021-01-06 16:04:53,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:04:53,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:04:53,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:04:53,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 1669 conjuncts, 76 conjunts are in the unsatisfiable core [2021-01-06 16:04:53,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:04:54,670 INFO L134 CoverageAnalysis]: Checked inductivity of 18981 backedges. 0 proven. 18981 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:04:54,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:04:54,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 78 [2021-01-06 16:04:54,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078588203] [2021-01-06 16:04:54,671 INFO L461 AbstractCegarLoop]: Interpolant automaton has 78 states [2021-01-06 16:04:54,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:04:54,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-01-06 16:04:54,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2021-01-06 16:04:54,672 INFO L87 Difference]: Start difference. First operand 599 states and 747 transitions. Second operand 78 states. [2021-01-06 16:04:55,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:04:55,656 INFO L93 Difference]: Finished difference Result 618 states and 770 transitions. [2021-01-06 16:04:55,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-01-06 16:04:55,657 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 524 [2021-01-06 16:04:55,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:04:55,660 INFO L225 Difference]: With dead ends: 618 [2021-01-06 16:04:55,660 INFO L226 Difference]: Without dead ends: 614 [2021-01-06 16:04:55,661 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 600 GetRequests, 524 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2021-01-06 16:04:55,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2021-01-06 16:04:55,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 607. [2021-01-06 16:04:55,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 607 states. [2021-01-06 16:04:55,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 757 transitions. [2021-01-06 16:04:55,667 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 757 transitions. Word has length 524 [2021-01-06 16:04:55,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:04:55,667 INFO L481 AbstractCegarLoop]: Abstraction has 607 states and 757 transitions. [2021-01-06 16:04:55,667 INFO L482 AbstractCegarLoop]: Interpolant automaton has 78 states. [2021-01-06 16:04:55,667 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 757 transitions. [2021-01-06 16:04:55,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 532 [2021-01-06 16:04:55,669 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:04:55,670 INFO L422 BasicCegarLoop]: trace histogram [75, 75, 75, 75, 75, 75, 75, 1, 1, 1, 1, 1, 1] [2021-01-06 16:04:55,870 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-01-06 16:04:55,870 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:04:55,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:04:55,871 INFO L82 PathProgramCache]: Analyzing trace with hash -2002328554, now seen corresponding path program 75 times [2021-01-06 16:04:55,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:04:55,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969897033] [2021-01-06 16:04:55,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:04:55,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:05:00,520 INFO L134 CoverageAnalysis]: Checked inductivity of 19500 backedges. 0 proven. 19500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:05:00,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969897033] [2021-01-06 16:05:00,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858723595] [2021-01-06 16:05:00,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:05:01,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 76 check-sat command(s) [2021-01-06 16:05:01,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:05:01,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 1691 conjuncts, 77 conjunts are in the unsatisfiable core [2021-01-06 16:05:01,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:05:02,091 INFO L134 CoverageAnalysis]: Checked inductivity of 19500 backedges. 0 proven. 19500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:05:02,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:05:02,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 79 [2021-01-06 16:05:02,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337814690] [2021-01-06 16:05:02,092 INFO L461 AbstractCegarLoop]: Interpolant automaton has 79 states [2021-01-06 16:05:02,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:05:02,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-01-06 16:05:02,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2021-01-06 16:05:02,093 INFO L87 Difference]: Start difference. First operand 607 states and 757 transitions. Second operand 79 states. [2021-01-06 16:05:03,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:05:03,507 INFO L93 Difference]: Finished difference Result 626 states and 780 transitions. [2021-01-06 16:05:03,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-01-06 16:05:03,507 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 531 [2021-01-06 16:05:03,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:05:03,510 INFO L225 Difference]: With dead ends: 626 [2021-01-06 16:05:03,510 INFO L226 Difference]: Without dead ends: 622 [2021-01-06 16:05:03,510 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 608 GetRequests, 531 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2021-01-06 16:05:03,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2021-01-06 16:05:03,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 615. [2021-01-06 16:05:03,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 615 states. [2021-01-06 16:05:03,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 767 transitions. [2021-01-06 16:05:03,516 INFO L78 Accepts]: Start accepts. Automaton has 615 states and 767 transitions. Word has length 531 [2021-01-06 16:05:03,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:05:03,516 INFO L481 AbstractCegarLoop]: Abstraction has 615 states and 767 transitions. [2021-01-06 16:05:03,516 INFO L482 AbstractCegarLoop]: Interpolant automaton has 79 states. [2021-01-06 16:05:03,516 INFO L276 IsEmpty]: Start isEmpty. Operand 615 states and 767 transitions. [2021-01-06 16:05:03,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 539 [2021-01-06 16:05:03,519 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:05:03,519 INFO L422 BasicCegarLoop]: trace histogram [76, 76, 76, 76, 76, 76, 76, 1, 1, 1, 1, 1, 1] [2021-01-06 16:05:03,719 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:05:03,720 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:05:03,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:05:03,721 INFO L82 PathProgramCache]: Analyzing trace with hash 436303365, now seen corresponding path program 76 times [2021-01-06 16:05:03,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:05:03,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553464934] [2021-01-06 16:05:03,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:05:03,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:05:08,498 INFO L134 CoverageAnalysis]: Checked inductivity of 20026 backedges. 0 proven. 20026 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:05:08,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553464934] [2021-01-06 16:05:08,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835483938] [2021-01-06 16:05:08,498 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:05:08,948 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:05:08,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:05:08,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 1713 conjuncts, 78 conjunts are in the unsatisfiable core [2021-01-06 16:05:08,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:05:09,768 INFO L134 CoverageAnalysis]: Checked inductivity of 20026 backedges. 0 proven. 20026 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:05:09,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:05:09,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 80 [2021-01-06 16:05:09,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231698814] [2021-01-06 16:05:09,769 INFO L461 AbstractCegarLoop]: Interpolant automaton has 80 states [2021-01-06 16:05:09,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:05:09,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-01-06 16:05:09,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2021-01-06 16:05:09,771 INFO L87 Difference]: Start difference. First operand 615 states and 767 transitions. Second operand 80 states. [2021-01-06 16:05:11,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:05:11,319 INFO L93 Difference]: Finished difference Result 634 states and 790 transitions. [2021-01-06 16:05:11,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-01-06 16:05:11,320 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 538 [2021-01-06 16:05:11,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:05:11,322 INFO L225 Difference]: With dead ends: 634 [2021-01-06 16:05:11,323 INFO L226 Difference]: Without dead ends: 630 [2021-01-06 16:05:11,323 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 616 GetRequests, 538 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2021-01-06 16:05:11,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2021-01-06 16:05:11,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 623. [2021-01-06 16:05:11,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 623 states. [2021-01-06 16:05:11,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 777 transitions. [2021-01-06 16:05:11,331 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 777 transitions. Word has length 538 [2021-01-06 16:05:11,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:05:11,332 INFO L481 AbstractCegarLoop]: Abstraction has 623 states and 777 transitions. [2021-01-06 16:05:11,332 INFO L482 AbstractCegarLoop]: Interpolant automaton has 80 states. [2021-01-06 16:05:11,332 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 777 transitions. [2021-01-06 16:05:11,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 546 [2021-01-06 16:05:11,335 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:05:11,336 INFO L422 BasicCegarLoop]: trace histogram [77, 77, 77, 77, 77, 77, 77, 1, 1, 1, 1, 1, 1] [2021-01-06 16:05:11,547 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:05:11,548 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:05:11,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:05:11,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1257592522, now seen corresponding path program 77 times [2021-01-06 16:05:11,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:05:11,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231034267] [2021-01-06 16:05:11,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:05:11,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:05:16,478 INFO L134 CoverageAnalysis]: Checked inductivity of 20559 backedges. 0 proven. 20559 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:05:16,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231034267] [2021-01-06 16:05:16,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459791061] [2021-01-06 16:05:16,479 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:05:17,289 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2021-01-06 16:05:17,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:05:17,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 1735 conjuncts, 79 conjunts are in the unsatisfiable core [2021-01-06 16:05:17,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:05:18,105 INFO L134 CoverageAnalysis]: Checked inductivity of 20559 backedges. 0 proven. 20559 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:05:18,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:05:18,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 81 [2021-01-06 16:05:18,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649488209] [2021-01-06 16:05:18,107 INFO L461 AbstractCegarLoop]: Interpolant automaton has 81 states [2021-01-06 16:05:18,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:05:18,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-01-06 16:05:18,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2021-01-06 16:05:18,108 INFO L87 Difference]: Start difference. First operand 623 states and 777 transitions. Second operand 81 states. [2021-01-06 16:05:19,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:05:19,534 INFO L93 Difference]: Finished difference Result 642 states and 800 transitions. [2021-01-06 16:05:19,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-01-06 16:05:19,535 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 545 [2021-01-06 16:05:19,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:05:19,538 INFO L225 Difference]: With dead ends: 642 [2021-01-06 16:05:19,538 INFO L226 Difference]: Without dead ends: 638 [2021-01-06 16:05:19,539 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 624 GetRequests, 545 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2021-01-06 16:05:19,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2021-01-06 16:05:19,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 631. [2021-01-06 16:05:19,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 631 states. [2021-01-06 16:05:19,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 631 states to 631 states and 787 transitions. [2021-01-06 16:05:19,545 INFO L78 Accepts]: Start accepts. Automaton has 631 states and 787 transitions. Word has length 545 [2021-01-06 16:05:19,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:05:19,546 INFO L481 AbstractCegarLoop]: Abstraction has 631 states and 787 transitions. [2021-01-06 16:05:19,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has 81 states. [2021-01-06 16:05:19,546 INFO L276 IsEmpty]: Start isEmpty. Operand 631 states and 787 transitions. [2021-01-06 16:05:19,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 553 [2021-01-06 16:05:19,548 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:05:19,548 INFO L422 BasicCegarLoop]: trace histogram [78, 78, 78, 78, 78, 78, 78, 1, 1, 1, 1, 1, 1] [2021-01-06 16:05:19,749 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-01-06 16:05:19,749 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:05:19,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:05:19,750 INFO L82 PathProgramCache]: Analyzing trace with hash 199994597, now seen corresponding path program 78 times [2021-01-06 16:05:19,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:05:19,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256422624] [2021-01-06 16:05:19,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:05:19,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:05:24,807 INFO L134 CoverageAnalysis]: Checked inductivity of 21099 backedges. 0 proven. 21099 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:05:24,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256422624] [2021-01-06 16:05:24,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545609855] [2021-01-06 16:05:24,807 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:05:25,706 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2021-01-06 16:05:25,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:05:25,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 1757 conjuncts, 80 conjunts are in the unsatisfiable core [2021-01-06 16:05:25,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:05:26,552 INFO L134 CoverageAnalysis]: Checked inductivity of 21099 backedges. 0 proven. 21099 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:05:26,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:05:26,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 82 [2021-01-06 16:05:26,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858127580] [2021-01-06 16:05:26,554 INFO L461 AbstractCegarLoop]: Interpolant automaton has 82 states [2021-01-06 16:05:26,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:05:26,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-01-06 16:05:26,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2021-01-06 16:05:26,555 INFO L87 Difference]: Start difference. First operand 631 states and 787 transitions. Second operand 82 states. [2021-01-06 16:05:27,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:05:27,989 INFO L93 Difference]: Finished difference Result 650 states and 810 transitions. [2021-01-06 16:05:27,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-01-06 16:05:27,989 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 552 [2021-01-06 16:05:27,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:05:27,992 INFO L225 Difference]: With dead ends: 650 [2021-01-06 16:05:27,992 INFO L226 Difference]: Without dead ends: 646 [2021-01-06 16:05:27,993 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 632 GetRequests, 552 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2021-01-06 16:05:27,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2021-01-06 16:05:28,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 639. [2021-01-06 16:05:28,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 639 states. [2021-01-06 16:05:28,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 797 transitions. [2021-01-06 16:05:28,002 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 797 transitions. Word has length 552 [2021-01-06 16:05:28,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:05:28,003 INFO L481 AbstractCegarLoop]: Abstraction has 639 states and 797 transitions. [2021-01-06 16:05:28,003 INFO L482 AbstractCegarLoop]: Interpolant automaton has 82 states. [2021-01-06 16:05:28,003 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 797 transitions. [2021-01-06 16:05:28,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 560 [2021-01-06 16:05:28,006 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:05:28,007 INFO L422 BasicCegarLoop]: trace histogram [79, 79, 79, 79, 79, 79, 79, 1, 1, 1, 1, 1, 1] [2021-01-06 16:05:28,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-01-06 16:05:28,208 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:05:28,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:05:28,208 INFO L82 PathProgramCache]: Analyzing trace with hash 207550038, now seen corresponding path program 79 times [2021-01-06 16:05:28,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:05:28,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30034642] [2021-01-06 16:05:28,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:05:28,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:05:33,426 INFO L134 CoverageAnalysis]: Checked inductivity of 21646 backedges. 0 proven. 21646 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:05:33,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30034642] [2021-01-06 16:05:33,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827252250] [2021-01-06 16:05:33,427 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:05:33,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:05:33,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 1779 conjuncts, 81 conjunts are in the unsatisfiable core [2021-01-06 16:05:33,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:05:34,714 INFO L134 CoverageAnalysis]: Checked inductivity of 21646 backedges. 0 proven. 21646 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:05:34,714 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:05:34,714 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 83 [2021-01-06 16:05:34,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688478423] [2021-01-06 16:05:34,715 INFO L461 AbstractCegarLoop]: Interpolant automaton has 83 states [2021-01-06 16:05:34,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:05:34,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-01-06 16:05:34,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2021-01-06 16:05:34,716 INFO L87 Difference]: Start difference. First operand 639 states and 797 transitions. Second operand 83 states. [2021-01-06 16:05:35,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:05:35,865 INFO L93 Difference]: Finished difference Result 658 states and 820 transitions. [2021-01-06 16:05:35,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-01-06 16:05:35,866 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 559 [2021-01-06 16:05:35,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:05:35,868 INFO L225 Difference]: With dead ends: 658 [2021-01-06 16:05:35,869 INFO L226 Difference]: Without dead ends: 654 [2021-01-06 16:05:35,869 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 640 GetRequests, 559 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2021-01-06 16:05:35,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2021-01-06 16:05:35,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 647. [2021-01-06 16:05:35,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 647 states. [2021-01-06 16:05:35,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 807 transitions. [2021-01-06 16:05:35,877 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 807 transitions. Word has length 559 [2021-01-06 16:05:35,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:05:35,877 INFO L481 AbstractCegarLoop]: Abstraction has 647 states and 807 transitions. [2021-01-06 16:05:35,877 INFO L482 AbstractCegarLoop]: Interpolant automaton has 83 states. [2021-01-06 16:05:35,877 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 807 transitions. [2021-01-06 16:05:35,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 567 [2021-01-06 16:05:35,880 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:05:35,880 INFO L422 BasicCegarLoop]: trace histogram [80, 80, 80, 80, 80, 80, 80, 1, 1, 1, 1, 1, 1] [2021-01-06 16:05:36,080 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:05:36,081 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:05:36,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:05:36,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1153194949, now seen corresponding path program 80 times [2021-01-06 16:05:36,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:05:36,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275369196] [2021-01-06 16:05:36,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:05:36,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat