/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/Muller_Kahan.c.p+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 16:00:39,019 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 16:00:39,022 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 16:00:39,080 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 16:00:39,080 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 16:00:39,086 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 16:00:39,089 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 16:00:39,094 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 16:00:39,098 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 16:00:39,104 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 16:00:39,109 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 16:00:39,111 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 16:00:39,112 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 16:00:39,117 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 16:00:39,120 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 16:00:39,122 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 16:00:39,123 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 16:00:39,148 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 16:00:39,157 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 16:00:39,160 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 16:00:39,161 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 16:00:39,164 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 16:00:39,165 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 16:00:39,167 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 16:00:39,174 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 16:00:39,193 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 16:00:39,194 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 16:00:39,195 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 16:00:39,196 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 16:00:39,242 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 16:00:39,243 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 16:00:39,246 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 16:00:39,247 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 16:00:39,247 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 16:00:39,247 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 16:00:39,247 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 16:00:39,248 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 16:00:39,248 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 16:00:39,248 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 16:00:39,249 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 16:00:39,250 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 16:00:39,250 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 16:00:39,250 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 16:00:39,250 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 16:00:39,250 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 16:00:39,251 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 16:00:39,251 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 16:00:39,251 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 16:00:39,251 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 16:00:39,251 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 16:00:39,252 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 16:00:39,252 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 16:00:39,252 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 16:00:39,252 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 16:00:39,252 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 16:00:39,683 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 16:00:39,709 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 16:00:39,712 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 16:00:39,713 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 16:00:39,714 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 16:00:39,715 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/Muller_Kahan.c.p+cfa-reducer.c [2021-01-06 16:00:39,783 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/2eb703324/5fb45a868b2c4b90ba7405537c9c9208/FLAGa79edac2b [2021-01-06 16:00:40,431 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 16:00:40,432 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/float-benchs/Muller_Kahan.c.p+cfa-reducer.c [2021-01-06 16:00:40,442 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/2eb703324/5fb45a868b2c4b90ba7405537c9c9208/FLAGa79edac2b [2021-01-06 16:00:40,784 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/2eb703324/5fb45a868b2c4b90ba7405537c9c9208 [2021-01-06 16:00:40,791 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 16:00:40,794 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 16:00:40,800 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 16:00:40,800 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 16:00:40,804 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 16:00:40,805 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:00:40" (1/1) ... [2021-01-06 16:00:40,807 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ada4d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:00:40, skipping insertion in model container [2021-01-06 16:00:40,808 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:00:40" (1/1) ... [2021-01-06 16:00:40,818 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 16:00:40,838 INFO L178 MainTranslator]: Built tables and reachable declarations left hand side expression in assignment: lhs: VariableLHS[~main__x0~0,] left hand side expression in assignment: lhs: VariableLHS[~main__x1~0,] left hand side expression in assignment: lhs: VariableLHS[~main__i~0,] left hand side expression in assignment: lhs: VariableLHS[~main__x2~0,] left hand side expression in assignment: lhs: VariableLHS[~main__x0~0,] left hand side expression in assignment: lhs: VariableLHS[~main__x1~0,] left hand side expression in assignment: lhs: VariableLHS[~main__i~0,] left hand side expression in assignment: lhs: VariableLHS[~main____CPAchecker_TMP_0~0,] left hand side expression in assignment: lhs: VariableLHS[~__tmp_1~0,] left hand side expression in assignment: lhs: VariableLHS[~__VERIFIER_assert__cond~0,] [2021-01-06 16:00:41,018 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/Muller_Kahan.c.p+cfa-reducer.c[964,977] left hand side expression in assignment: lhs: VariableLHS[~main____CPAchecker_TMP_0~0,] [2021-01-06 16:00:41,025 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:00:41,037 INFO L203 MainTranslator]: Completed pre-run left hand side expression in assignment: lhs: VariableLHS[~main__x0~0,] left hand side expression in assignment: lhs: VariableLHS[~main__x1~0,] left hand side expression in assignment: lhs: VariableLHS[~main__i~0,] left hand side expression in assignment: lhs: VariableLHS[~main__x2~0,] left hand side expression in assignment: lhs: VariableLHS[~main__x0~0,] left hand side expression in assignment: lhs: VariableLHS[~main__x1~0,] left hand side expression in assignment: lhs: VariableLHS[~main__i~0,] left hand side expression in assignment: lhs: VariableLHS[~main____CPAchecker_TMP_0~0,] left hand side expression in assignment: lhs: VariableLHS[~__tmp_1~0,] left hand side expression in assignment: lhs: VariableLHS[~__VERIFIER_assert__cond~0,] [2021-01-06 16:00:41,058 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/Muller_Kahan.c.p+cfa-reducer.c[964,977] left hand side expression in assignment: lhs: VariableLHS[~main____CPAchecker_TMP_0~0,] [2021-01-06 16:00:41,059 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:00:41,077 INFO L208 MainTranslator]: Completed translation [2021-01-06 16:00:41,077 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:00:41 WrapperNode [2021-01-06 16:00:41,078 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 16:00:41,079 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 16:00:41,079 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 16:00:41,079 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 16:00:41,090 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:00:41" (1/1) ... [2021-01-06 16:00:41,098 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:00:41" (1/1) ... [2021-01-06 16:00:41,120 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 16:00:41,121 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 16:00:41,121 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 16:00:41,121 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 16:00:41,131 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:00:41" (1/1) ... [2021-01-06 16:00:41,131 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:00:41" (1/1) ... [2021-01-06 16:00:41,133 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:00:41" (1/1) ... [2021-01-06 16:00:41,133 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:00:41" (1/1) ... [2021-01-06 16:00:41,138 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:00:41" (1/1) ... [2021-01-06 16:00:41,140 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:00:41" (1/1) ... [2021-01-06 16:00:41,142 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:00:41" (1/1) ... [2021-01-06 16:00:41,143 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 16:00:41,145 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 16:00:41,145 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 16:00:41,145 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 16:00:41,146 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:00:41" (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 16:00:41,259 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 16:00:41,259 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 16:00:41,260 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 16:00:41,260 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 16:00:41,545 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 16:00:41,545 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-01-06 16:00:41,547 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:00:41 BoogieIcfgContainer [2021-01-06 16:00:41,548 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 16:00:41,550 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 16:00:41,550 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 16:00:41,553 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 16:00:41,554 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 04:00:40" (1/3) ... [2021-01-06 16:00:41,554 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27d51e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:00:41, skipping insertion in model container [2021-01-06 16:00:41,555 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:00:41" (2/3) ... [2021-01-06 16:00:41,555 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27d51e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:00:41, skipping insertion in model container [2021-01-06 16:00:41,555 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:00:41" (3/3) ... [2021-01-06 16:00:41,557 INFO L111 eAbstractionObserver]: Analyzing ICFG Muller_Kahan.c.p+cfa-reducer.c [2021-01-06 16:00:41,565 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 16:00:41,570 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 16:00:41,678 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 16:00:41,741 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 16:00:41,741 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 16:00:41,741 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 16:00:41,742 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 16:00:41,742 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 16:00:41,742 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 16:00:41,742 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 16:00:41,743 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 16:00:41,761 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2021-01-06 16:00:41,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-01-06 16:00:41,766 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:00:41,767 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:00:41,768 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:00:41,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:00:41,777 INFO L82 PathProgramCache]: Analyzing trace with hash 207177897, now seen corresponding path program 1 times [2021-01-06 16:00:41,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:00:41,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094111501] [2021-01-06 16:00:41,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:00:41,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:00:41,997 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 16:00:41,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094111501] [2021-01-06 16:00:41,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:00:41,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 16:00:42,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572687000] [2021-01-06 16:00:42,005 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 16:00:42,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:00:42,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 16:00:42,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 16:00:42,026 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 3 states. [2021-01-06 16:00:42,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:00:42,058 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2021-01-06 16:00:42,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 16:00:42,061 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2021-01-06 16:00:42,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:00:42,071 INFO L225 Difference]: With dead ends: 24 [2021-01-06 16:00:42,072 INFO L226 Difference]: Without dead ends: 11 [2021-01-06 16:00:42,075 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 16:00:42,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-01-06 16:00:42,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-01-06 16:00:42,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-01-06 16:00:42,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2021-01-06 16:00:42,120 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 8 [2021-01-06 16:00:42,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:00:42,121 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2021-01-06 16:00:42,121 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 16:00:42,121 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2021-01-06 16:00:42,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-06 16:00:42,122 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:00:42,122 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:00:42,122 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 16:00:42,123 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:00:42,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:00:42,124 INFO L82 PathProgramCache]: Analyzing trace with hash 263819657, now seen corresponding path program 1 times [2021-01-06 16:00:42,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:00:42,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709776225] [2021-01-06 16:00:42,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:00:42,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:00:42,250 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 16:00:42,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709776225] [2021-01-06 16:00:42,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135787392] [2021-01-06 16:00:42,252 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 16:00:42,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:00:42,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 16:00:42,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:00:42,450 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 16:00:42,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:00:42,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 16:00:42,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557421375] [2021-01-06 16:00:42,454 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 16:00:42,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:00:42,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 16:00:42,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 16:00:42,459 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand 5 states. [2021-01-06 16:00:42,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:00:42,493 INFO L93 Difference]: Finished difference Result 19 states and 23 transitions. [2021-01-06 16:00:42,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 16:00:42,494 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2021-01-06 16:00:42,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:00:42,495 INFO L225 Difference]: With dead ends: 19 [2021-01-06 16:00:42,495 INFO L226 Difference]: Without dead ends: 12 [2021-01-06 16:00:42,497 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 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 16:00:42,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-01-06 16:00:42,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-01-06 16:00:42,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-01-06 16:00:42,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2021-01-06 16:00:42,504 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 9 [2021-01-06 16:00:42,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:00:42,505 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2021-01-06 16:00:42,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 16:00:42,506 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2021-01-06 16:00:42,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 16:00:42,506 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:00:42,507 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:00:42,721 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 16:00:42,722 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:00:42,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:00:42,724 INFO L82 PathProgramCache]: Analyzing trace with hash 2019714217, now seen corresponding path program 2 times [2021-01-06 16:00:42,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:00:42,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045380769] [2021-01-06 16:00:42,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:00:42,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:00:42,780 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-01-06 16:00:42,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045380769] [2021-01-06 16:00:42,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:00:42,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 16:00:42,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454564791] [2021-01-06 16:00:42,782 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 16:00:42,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:00:42,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 16:00:42,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-01-06 16:00:42,784 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand 4 states. [2021-01-06 16:00:42,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:00:42,815 INFO L93 Difference]: Finished difference Result 16 states and 17 transitions. [2021-01-06 16:00:42,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 16:00:42,816 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2021-01-06 16:00:42,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:00:42,817 INFO L225 Difference]: With dead ends: 16 [2021-01-06 16:00:42,817 INFO L226 Difference]: Without dead ends: 12 [2021-01-06 16:00:42,818 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-01-06 16:00:42,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-01-06 16:00:42,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-01-06 16:00:42,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-01-06 16:00:42,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2021-01-06 16:00:42,822 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 10 [2021-01-06 16:00:42,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:00:42,822 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2021-01-06 16:00:42,822 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 16:00:42,822 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2021-01-06 16:00:42,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 16:00:42,823 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:00:42,823 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:00:42,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-01-06 16:00:42,824 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:00:42,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:00:42,824 INFO L82 PathProgramCache]: Analyzing trace with hash 2036724878, now seen corresponding path program 1 times [2021-01-06 16:00:42,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:00:42,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108089219] [2021-01-06 16:00:42,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:00:42,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:00:42,906 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:00:42,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108089219] [2021-01-06 16:00:42,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426673991] [2021-01-06 16:00:42,907 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 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 16:00:42,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:00:42,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 16:00:42,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:00:43,017 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:00:43,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:00:43,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-01-06 16:00:43,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273215892] [2021-01-06 16:00:43,018 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 16:00:43,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:00:43,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 16:00:43,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 16:00:43,020 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 6 states. [2021-01-06 16:00:43,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:00:43,040 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2021-01-06 16:00:43,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 16:00:43,041 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2021-01-06 16:00:43,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:00:43,042 INFO L225 Difference]: With dead ends: 20 [2021-01-06 16:00:43,042 INFO L226 Difference]: Without dead ends: 13 [2021-01-06 16:00:43,042 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 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 16:00:43,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-01-06 16:00:43,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-01-06 16:00:43,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-01-06 16:00:43,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2021-01-06 16:00:43,047 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2021-01-06 16:00:43,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:00:43,047 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-01-06 16:00:43,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 16:00:43,047 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2021-01-06 16:00:43,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 16:00:43,048 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:00:43,048 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:00:43,262 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:00:43,263 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:00:43,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:00:43,265 INFO L82 PathProgramCache]: Analyzing trace with hash 634881390, now seen corresponding path program 2 times [2021-01-06 16:00:43,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:00:43,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411717911] [2021-01-06 16:00:43,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:00:43,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:00:43,358 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:00:43,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411717911] [2021-01-06 16:00:43,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611789728] [2021-01-06 16:00:43,359 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 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 16:00:43,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:00:43,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:00:43,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 16:00:43,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:00:43,494 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:00:43,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:00:43,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-01-06 16:00:43,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327347403] [2021-01-06 16:00:43,495 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 16:00:43,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:00:43,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 16:00:43,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 16:00:43,497 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 7 states. [2021-01-06 16:00:43,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:00:43,519 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2021-01-06 16:00:43,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 16:00:43,521 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2021-01-06 16:00:43,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:00:43,521 INFO L225 Difference]: With dead ends: 21 [2021-01-06 16:00:43,521 INFO L226 Difference]: Without dead ends: 14 [2021-01-06 16:00:43,522 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 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 16:00:43,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-01-06 16:00:43,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-01-06 16:00:43,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-01-06 16:00:43,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2021-01-06 16:00:43,526 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2021-01-06 16:00:43,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:00:43,527 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2021-01-06 16:00:43,527 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 16:00:43,527 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2021-01-06 16:00:43,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 16:00:43,528 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:00:43,528 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:00:43,742 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:00:43,743 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:00:43,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:00:43,745 INFO L82 PathProgramCache]: Analyzing trace with hash 127406222, now seen corresponding path program 3 times [2021-01-06 16:00:43,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:00:43,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826697360] [2021-01-06 16:00:43,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:00:43,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:00:43,849 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:00:43,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826697360] [2021-01-06 16:00:43,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542797476] [2021-01-06 16:00:43,850 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 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 16:00:43,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 16:00:43,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:00:43,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 16:00:43,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:00:43,994 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:00:43,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:00:43,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-01-06 16:00:43,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132161133] [2021-01-06 16:00:43,995 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 16:00:43,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:00:43,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 16:00:43,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 16:00:43,997 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 8 states. [2021-01-06 16:00:44,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:00:44,038 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2021-01-06 16:00:44,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 16:00:44,039 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2021-01-06 16:00:44,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:00:44,039 INFO L225 Difference]: With dead ends: 22 [2021-01-06 16:00:44,040 INFO L226 Difference]: Without dead ends: 15 [2021-01-06 16:00:44,040 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 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 16:00:44,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-01-06 16:00:44,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-01-06 16:00:44,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-01-06 16:00:44,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-01-06 16:00:44,044 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2021-01-06 16:00:44,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:00:44,044 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-01-06 16:00:44,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 16:00:44,045 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-01-06 16:00:44,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 16:00:44,045 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:00:44,045 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:00:44,259 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:00:44,260 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:00:44,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:00:44,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1575545198, now seen corresponding path program 4 times [2021-01-06 16:00:44,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:00:44,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021265322] [2021-01-06 16:00:44,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:00:44,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:00:44,373 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:00:44,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021265322] [2021-01-06 16:00:44,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591614951] [2021-01-06 16:00:44,375 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 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 16:00:44,460 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:00:44,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:00:44,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 16:00:44,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:00:44,518 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:00:44,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:00:44,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-01-06 16:00:44,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381804089] [2021-01-06 16:00:44,520 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 16:00:44,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:00:44,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 16:00:44,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 16:00:44,524 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 9 states. [2021-01-06 16:00:44,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:00:44,552 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2021-01-06 16:00:44,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 16:00:44,553 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2021-01-06 16:00:44,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:00:44,553 INFO L225 Difference]: With dead ends: 23 [2021-01-06 16:00:44,554 INFO L226 Difference]: Without dead ends: 16 [2021-01-06 16:00:44,554 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 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 16:00:44,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-01-06 16:00:44,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-01-06 16:00:44,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-01-06 16:00:44,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2021-01-06 16:00:44,558 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 13 [2021-01-06 16:00:44,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:00:44,558 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2021-01-06 16:00:44,558 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 16:00:44,559 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2021-01-06 16:00:44,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 16:00:44,559 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:00:44,559 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:00:44,772 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-01-06 16:00:44,773 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:00:44,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:00:44,774 INFO L82 PathProgramCache]: Analyzing trace with hash -776786802, now seen corresponding path program 5 times [2021-01-06 16:00:44,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:00:44,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013492203] [2021-01-06 16:00:44,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:00:44,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:00:44,888 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:00:44,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013492203] [2021-01-06 16:00:44,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067922852] [2021-01-06 16:00:44,889 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 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 16:00:44,968 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-06 16:00:44,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:00:44,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 16:00:44,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:00:45,025 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:00:45,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:00:45,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-01-06 16:00:45,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092824386] [2021-01-06 16:00:45,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 16:00:45,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:00:45,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 16:00:45,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 16:00:45,028 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 10 states. [2021-01-06 16:00:45,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:00:45,057 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2021-01-06 16:00:45,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 16:00:45,058 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2021-01-06 16:00:45,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:00:45,059 INFO L225 Difference]: With dead ends: 24 [2021-01-06 16:00:45,059 INFO L226 Difference]: Without dead ends: 17 [2021-01-06 16:00:45,060 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 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 16:00:45,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-01-06 16:00:45,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-01-06 16:00:45,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-01-06 16:00:45,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2021-01-06 16:00:45,065 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 14 [2021-01-06 16:00:45,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:00:45,065 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2021-01-06 16:00:45,065 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 16:00:45,065 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2021-01-06 16:00:45,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 16:00:45,066 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:00:45,066 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:00:45,280 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:00:45,281 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:00:45,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:00:45,282 INFO L82 PathProgramCache]: Analyzing trace with hash -684634770, now seen corresponding path program 6 times [2021-01-06 16:00:45,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:00:45,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682530305] [2021-01-06 16:00:45,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:00:45,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:00:45,417 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:00:45,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682530305] [2021-01-06 16:00:45,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444575350] [2021-01-06 16:00:45,418 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 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 16:00:45,497 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-01-06 16:00:45,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:00:45,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 16:00:45,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:00:45,558 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:00:45,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:00:45,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-01-06 16:00:45,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323405596] [2021-01-06 16:00:45,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 16:00:45,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:00:45,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 16:00:45,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 16:00:45,561 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 11 states. [2021-01-06 16:00:45,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:00:45,587 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2021-01-06 16:00:45,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 16:00:45,588 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2021-01-06 16:00:45,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:00:45,588 INFO L225 Difference]: With dead ends: 25 [2021-01-06 16:00:45,589 INFO L226 Difference]: Without dead ends: 18 [2021-01-06 16:00:45,589 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 16:00:45,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-01-06 16:00:45,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-01-06 16:00:45,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-01-06 16:00:45,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2021-01-06 16:00:45,594 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 15 [2021-01-06 16:00:45,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:00:45,594 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2021-01-06 16:00:45,594 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 16:00:45,594 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2021-01-06 16:00:45,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 16:00:45,595 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:00:45,595 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:00:45,808 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:00:45,809 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:00:45,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:00:45,810 INFO L82 PathProgramCache]: Analyzing trace with hash -2122889074, now seen corresponding path program 7 times [2021-01-06 16:00:45,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:00:45,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796375772] [2021-01-06 16:00:45,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:00:45,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:00:45,926 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:00:45,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796375772] [2021-01-06 16:00:45,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475968289] [2021-01-06 16:00:45,927 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 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 16:00:45,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:00:45,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 16:00:45,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:00:46,026 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:00:46,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:00:46,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-01-06 16:00:46,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110227280] [2021-01-06 16:00:46,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 16:00:46,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:00:46,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 16:00:46,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 16:00:46,029 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 12 states. [2021-01-06 16:00:46,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:00:46,050 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2021-01-06 16:00:46,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 16:00:46,051 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2021-01-06 16:00:46,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:00:46,052 INFO L225 Difference]: With dead ends: 26 [2021-01-06 16:00:46,052 INFO L226 Difference]: Without dead ends: 19 [2021-01-06 16:00:46,052 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 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 16:00:46,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-01-06 16:00:46,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-01-06 16:00:46,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-01-06 16:00:46,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2021-01-06 16:00:46,056 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 16 [2021-01-06 16:00:46,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:00:46,057 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2021-01-06 16:00:46,057 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 16:00:46,057 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2021-01-06 16:00:46,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 16:00:46,058 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:00:46,058 INFO L422 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:00:46,273 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-01-06 16:00:46,274 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:00:46,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:00:46,276 INFO L82 PathProgramCache]: Analyzing trace with hash 535867758, now seen corresponding path program 8 times [2021-01-06 16:00:46,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:00:46,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476051543] [2021-01-06 16:00:46,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:00:46,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:00:46,399 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:00:46,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476051543] [2021-01-06 16:00:46,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107759802] [2021-01-06 16:00:46,400 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 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 16:00:46,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:00:46,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:00:46,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 16:00:46,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:00:46,508 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:00:46,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:00:46,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-01-06 16:00:46,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424429132] [2021-01-06 16:00:46,509 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 16:00:46,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:00:46,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 16:00:46,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 16:00:46,511 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 13 states. [2021-01-06 16:00:46,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:00:46,542 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2021-01-06 16:00:46,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 16:00:46,545 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2021-01-06 16:00:46,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:00:46,546 INFO L225 Difference]: With dead ends: 27 [2021-01-06 16:00:46,546 INFO L226 Difference]: Without dead ends: 20 [2021-01-06 16:00:46,547 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 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 16:00:46,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-01-06 16:00:46,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-01-06 16:00:46,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-01-06 16:00:46,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2021-01-06 16:00:46,553 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2021-01-06 16:00:46,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:00:46,553 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2021-01-06 16:00:46,554 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 16:00:46,554 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2021-01-06 16:00:46,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 16:00:46,554 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:00:46,554 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:00:46,757 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:00:46,758 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:00:46,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:00:46,759 INFO L82 PathProgramCache]: Analyzing trace with hash 1352950926, now seen corresponding path program 9 times [2021-01-06 16:00:46,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:00:46,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624955115] [2021-01-06 16:00:46,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:00:46,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:00:46,947 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:00:46,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624955115] [2021-01-06 16:00:46,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760242199] [2021-01-06 16:00:46,948 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 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 16:00:47,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-01-06 16:00:47,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:00:47,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 16:00:47,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:00:47,075 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:00:47,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:00:47,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-01-06 16:00:47,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938804251] [2021-01-06 16:00:47,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 16:00:47,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:00:47,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 16:00:47,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-01-06 16:00:47,078 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 14 states. [2021-01-06 16:00:47,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:00:47,100 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2021-01-06 16:00:47,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 16:00:47,101 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2021-01-06 16:00:47,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:00:47,102 INFO L225 Difference]: With dead ends: 28 [2021-01-06 16:00:47,103 INFO L226 Difference]: Without dead ends: 21 [2021-01-06 16:00:47,103 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-01-06 16:00:47,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-01-06 16:00:47,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-01-06 16:00:47,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-01-06 16:00:47,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2021-01-06 16:00:47,108 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 18 [2021-01-06 16:00:47,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:00:47,108 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2021-01-06 16:00:47,108 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 16:00:47,109 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2021-01-06 16:00:47,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-01-06 16:00:47,109 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:00:47,109 INFO L422 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:00:47,322 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:00:47,323 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:00:47,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:00:47,324 INFO L82 PathProgramCache]: Analyzing trace with hash 912725358, now seen corresponding path program 10 times [2021-01-06 16:00:47,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:00:47,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173796541] [2021-01-06 16:00:47,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:00:47,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:00:47,496 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:00:47,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173796541] [2021-01-06 16:00:47,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620403264] [2021-01-06 16:00:47,497 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 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 16:00:47,573 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:00:47,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:00:47,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 16:00:47,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:00:47,642 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:00:47,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:00:47,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-01-06 16:00:47,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033878298] [2021-01-06 16:00:47,643 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 16:00:47,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:00:47,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 16:00:47,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-01-06 16:00:47,644 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 15 states. [2021-01-06 16:00:47,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:00:47,671 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2021-01-06 16:00:47,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 16:00:47,671 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2021-01-06 16:00:47,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:00:47,672 INFO L225 Difference]: With dead ends: 29 [2021-01-06 16:00:47,672 INFO L226 Difference]: Without dead ends: 22 [2021-01-06 16:00:47,673 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-01-06 16:00:47,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-01-06 16:00:47,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-01-06 16:00:47,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-01-06 16:00:47,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2021-01-06 16:00:47,677 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 19 [2021-01-06 16:00:47,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:00:47,677 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2021-01-06 16:00:47,677 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 16:00:47,677 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2021-01-06 16:00:47,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 16:00:47,678 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:00:47,678 INFO L422 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:00:47,892 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 16:00:47,893 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:00:47,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:00:47,894 INFO L82 PathProgramCache]: Analyzing trace with hash 150634638, now seen corresponding path program 11 times [2021-01-06 16:00:47,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:00:47,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183437666] [2021-01-06 16:00:47,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:00:47,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:00:48,054 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:00:48,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183437666] [2021-01-06 16:00:48,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921391390] [2021-01-06 16:00:48,054 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 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 16:00:48,119 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-01-06 16:00:48,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:00:48,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 16:00:48,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:00:48,175 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:00:48,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:00:48,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-01-06 16:00:48,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936644657] [2021-01-06 16:00:48,176 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 16:00:48,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:00:48,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 16:00:48,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-01-06 16:00:48,178 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 16 states. [2021-01-06 16:00:48,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:00:48,211 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2021-01-06 16:00:48,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 16:00:48,212 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2021-01-06 16:00:48,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:00:48,213 INFO L225 Difference]: With dead ends: 30 [2021-01-06 16:00:48,213 INFO L226 Difference]: Without dead ends: 23 [2021-01-06 16:00:48,213 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 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 16:00:48,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-01-06 16:00:48,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-01-06 16:00:48,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-01-06 16:00:48,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2021-01-06 16:00:48,217 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 20 [2021-01-06 16:00:48,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:00:48,218 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2021-01-06 16:00:48,218 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 16:00:48,218 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2021-01-06 16:00:48,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-01-06 16:00:48,218 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:00:48,219 INFO L422 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:00:48,433 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 16:00:48,434 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:00:48,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:00:48,435 INFO L82 PathProgramCache]: Analyzing trace with hash -1999341202, now seen corresponding path program 12 times [2021-01-06 16:00:48,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:00:48,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525713499] [2021-01-06 16:00:48,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:00:48,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:00:48,631 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:00:48,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525713499] [2021-01-06 16:00:48,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384610350] [2021-01-06 16:00:48,632 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 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 16:00:48,702 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-01-06 16:00:48,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:00:48,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 16:00:48,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:00:48,793 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:00:48,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:00:48,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-01-06 16:00:48,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966976973] [2021-01-06 16:00:48,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 16:00:48,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:00:48,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 16:00:48,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-01-06 16:00:48,800 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 17 states. [2021-01-06 16:00:48,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:00:48,836 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2021-01-06 16:00:48,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 16:00:48,836 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2021-01-06 16:00:48,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:00:48,837 INFO L225 Difference]: With dead ends: 31 [2021-01-06 16:00:48,837 INFO L226 Difference]: Without dead ends: 24 [2021-01-06 16:00:48,838 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 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 16:00:48,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-01-06 16:00:48,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-01-06 16:00:48,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-01-06 16:00:48,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2021-01-06 16:00:48,842 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 21 [2021-01-06 16:00:48,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:00:48,842 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2021-01-06 16:00:48,842 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 16:00:48,842 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2021-01-06 16:00:48,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 16:00:48,843 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:00:48,843 INFO L422 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:00:49,056 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-01-06 16:00:49,057 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:00:49,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:00:49,058 INFO L82 PathProgramCache]: Analyzing trace with hash 70884494, now seen corresponding path program 13 times [2021-01-06 16:00:49,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:00:49,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657566336] [2021-01-06 16:00:49,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:00:49,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:00:49,267 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:00:49,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657566336] [2021-01-06 16:00:49,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284548217] [2021-01-06 16:00:49,268 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 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 16:00:49,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:00:49,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 16:00:49,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:00:49,401 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:00:49,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:00:49,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-01-06 16:00:49,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833832016] [2021-01-06 16:00:49,402 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 16:00:49,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:00:49,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 16:00:49,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-01-06 16:00:49,403 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 18 states. [2021-01-06 16:00:49,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:00:49,446 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2021-01-06 16:00:49,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 16:00:49,447 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2021-01-06 16:00:49,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:00:49,449 INFO L225 Difference]: With dead ends: 32 [2021-01-06 16:00:49,449 INFO L226 Difference]: Without dead ends: 25 [2021-01-06 16:00:49,450 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 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 16:00:49,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-01-06 16:00:49,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-01-06 16:00:49,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-01-06 16:00:49,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2021-01-06 16:00:49,457 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 22 [2021-01-06 16:00:49,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:00:49,457 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2021-01-06 16:00:49,457 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 16:00:49,458 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2021-01-06 16:00:49,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-01-06 16:00:49,466 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:00:49,466 INFO L422 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:00:49,677 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:00:49,678 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:00:49,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:00:49,679 INFO L82 PathProgramCache]: Analyzing trace with hash -176628370, now seen corresponding path program 14 times [2021-01-06 16:00:49,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:00:49,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923867749] [2021-01-06 16:00:49,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:00:49,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:00:49,889 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:00:49,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923867749] [2021-01-06 16:00:49,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060130377] [2021-01-06 16:00:49,890 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 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 16:00:49,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:00:49,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:00:49,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 16:00:49,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:00:50,013 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:00:50,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:00:50,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-01-06 16:00:50,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275802987] [2021-01-06 16:00:50,015 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 16:00:50,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:00:50,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 16:00:50,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-01-06 16:00:50,017 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 19 states. [2021-01-06 16:00:50,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:00:50,044 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2021-01-06 16:00:50,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 16:00:50,045 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2021-01-06 16:00:50,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:00:50,047 INFO L225 Difference]: With dead ends: 33 [2021-01-06 16:00:50,048 INFO L226 Difference]: Without dead ends: 26 [2021-01-06 16:00:50,050 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 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 16:00:50,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-01-06 16:00:50,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-01-06 16:00:50,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-01-06 16:00:50,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2021-01-06 16:00:50,056 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 23 [2021-01-06 16:00:50,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:00:50,057 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2021-01-06 16:00:50,057 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 16:00:50,057 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2021-01-06 16:00:50,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-01-06 16:00:50,057 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:00:50,057 INFO L422 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:00:50,271 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 16:00:50,272 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:00:50,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:00:50,273 INFO L82 PathProgramCache]: Analyzing trace with hash 740407438, now seen corresponding path program 15 times [2021-01-06 16:00:50,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:00:50,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76872145] [2021-01-06 16:00:50,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:00:50,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:00:50,528 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:00:50,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76872145] [2021-01-06 16:00:50,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844951131] [2021-01-06 16:00:50,529 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 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 16:00:50,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-01-06 16:00:50,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:00:50,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 16:00:50,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:00:50,713 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:00:50,714 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:00:50,714 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-01-06 16:00:50,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46982323] [2021-01-06 16:00:50,715 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 16:00:50,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:00:50,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 16:00:50,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-01-06 16:00:50,716 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 20 states. [2021-01-06 16:00:50,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:00:50,740 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2021-01-06 16:00:50,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 16:00:50,741 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2021-01-06 16:00:50,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:00:50,741 INFO L225 Difference]: With dead ends: 34 [2021-01-06 16:00:50,741 INFO L226 Difference]: Without dead ends: 27 [2021-01-06 16:00:50,742 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-01-06 16:00:50,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-01-06 16:00:50,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-01-06 16:00:50,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-01-06 16:00:50,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2021-01-06 16:00:50,746 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 24 [2021-01-06 16:00:50,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:00:50,746 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2021-01-06 16:00:50,746 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 16:00:50,746 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2021-01-06 16:00:50,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-01-06 16:00:50,747 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:00:50,747 INFO L422 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:00:50,960 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-06 16:00:50,961 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:00:50,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:00:50,961 INFO L82 PathProgramCache]: Analyzing trace with hash -896253586, now seen corresponding path program 16 times [2021-01-06 16:00:50,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:00:50,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079988119] [2021-01-06 16:00:50,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:00:50,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:00:51,249 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:00:51,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079988119] [2021-01-06 16:00:51,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876450176] [2021-01-06 16:00:51,251 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 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 16:00:51,312 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:00:51,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:00:51,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 16:00:51,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:00:51,386 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:00:51,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:00:51,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-01-06 16:00:51,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341015424] [2021-01-06 16:00:51,389 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 16:00:51,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:00:51,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 16:00:51,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-01-06 16:00:51,392 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 21 states. [2021-01-06 16:00:51,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:00:51,425 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2021-01-06 16:00:51,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 16:00:51,426 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2021-01-06 16:00:51,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:00:51,427 INFO L225 Difference]: With dead ends: 35 [2021-01-06 16:00:51,427 INFO L226 Difference]: Without dead ends: 28 [2021-01-06 16:00:51,428 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-01-06 16:00:51,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-01-06 16:00:51,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-01-06 16:00:51,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-01-06 16:00:51,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2021-01-06 16:00:51,432 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 25 [2021-01-06 16:00:51,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:00:51,432 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2021-01-06 16:00:51,432 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 16:00:51,433 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2021-01-06 16:00:51,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-01-06 16:00:51,433 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:00:51,433 INFO L422 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:00:51,647 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:00:51,647 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:00:51,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:00:51,648 INFO L82 PathProgramCache]: Analyzing trace with hash -93137778, now seen corresponding path program 17 times [2021-01-06 16:00:51,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:00:51,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027615167] [2021-01-06 16:00:51,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:00:51,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:00:51,949 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:00:51,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027615167] [2021-01-06 16:00:51,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331316296] [2021-01-06 16:00:51,950 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 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 16:00:52,021 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-01-06 16:00:52,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:00:52,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 16:00:52,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:00:52,074 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:00:52,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:00:52,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-01-06 16:00:52,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187856260] [2021-01-06 16:00:52,075 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 16:00:52,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:00:52,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 16:00:52,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-01-06 16:00:52,076 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 22 states. [2021-01-06 16:00:52,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:00:52,108 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2021-01-06 16:00:52,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 16:00:52,109 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2021-01-06 16:00:52,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:00:52,109 INFO L225 Difference]: With dead ends: 36 [2021-01-06 16:00:52,110 INFO L226 Difference]: Without dead ends: 29 [2021-01-06 16:00:52,110 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 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 16:00:52,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-01-06 16:00:52,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-01-06 16:00:52,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-01-06 16:00:52,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2021-01-06 16:00:52,114 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 26 [2021-01-06 16:00:52,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:00:52,114 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2021-01-06 16:00:52,114 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 16:00:52,115 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2021-01-06 16:00:52,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-01-06 16:00:52,115 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:00:52,115 INFO L422 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:00:52,330 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:00:52,331 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:00:52,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:00:52,332 INFO L82 PathProgramCache]: Analyzing trace with hash -966351506, now seen corresponding path program 18 times [2021-01-06 16:00:52,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:00:52,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288579571] [2021-01-06 16:00:52,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:00:52,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:00:52,602 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:00:52,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288579571] [2021-01-06 16:00:52,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578467253] [2021-01-06 16:00:52,602 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 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 16:00:52,679 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-01-06 16:00:52,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:00:52,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 16:00:52,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:00:52,750 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:00:52,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:00:52,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-01-06 16:00:52,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799146356] [2021-01-06 16:00:52,752 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-06 16:00:52,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:00:52,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-06 16:00:52,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-01-06 16:00:52,753 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 23 states. [2021-01-06 16:00:52,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:00:52,789 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2021-01-06 16:00:52,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 16:00:52,790 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2021-01-06 16:00:52,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:00:52,791 INFO L225 Difference]: With dead ends: 37 [2021-01-06 16:00:52,791 INFO L226 Difference]: Without dead ends: 30 [2021-01-06 16:00:52,792 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 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 16:00:52,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-01-06 16:00:52,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-01-06 16:00:52,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-01-06 16:00:52,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2021-01-06 16:00:52,796 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 27 [2021-01-06 16:00:52,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:00:52,796 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2021-01-06 16:00:52,796 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-01-06 16:00:52,796 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2021-01-06 16:00:52,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-01-06 16:00:52,797 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:00:52,797 INFO L422 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:00:53,011 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:00:53,012 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:00:53,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:00:53,013 INFO L82 PathProgramCache]: Analyzing trace with hash 2028793998, now seen corresponding path program 19 times [2021-01-06 16:00:53,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:00:53,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791593596] [2021-01-06 16:00:53,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:00:53,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:00:53,353 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:00:53,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791593596] [2021-01-06 16:00:53,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39378766] [2021-01-06 16:00:53,354 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 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 16:00:53,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:00:53,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 16:00:53,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:00:53,485 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:00:53,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:00:53,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-01-06 16:00:53,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221486013] [2021-01-06 16:00:53,486 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-01-06 16:00:53,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:00:53,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-01-06 16:00:53,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-01-06 16:00:53,487 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 24 states. [2021-01-06 16:00:53,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:00:53,525 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2021-01-06 16:00:53,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-06 16:00:53,528 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2021-01-06 16:00:53,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:00:53,529 INFO L225 Difference]: With dead ends: 38 [2021-01-06 16:00:53,529 INFO L226 Difference]: Without dead ends: 31 [2021-01-06 16:00:53,530 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 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 16:00:53,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-01-06 16:00:53,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-01-06 16:00:53,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-01-06 16:00:53,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2021-01-06 16:00:53,533 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 28 [2021-01-06 16:00:53,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:00:53,533 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2021-01-06 16:00:53,533 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-01-06 16:00:53,533 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2021-01-06 16:00:53,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-01-06 16:00:53,534 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:00:53,534 INFO L422 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:00:53,748 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-01-06 16:00:53,749 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:00:53,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:00:53,750 INFO L82 PathProgramCache]: Analyzing trace with hash 389024110, now seen corresponding path program 20 times [2021-01-06 16:00:53,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:00:53,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305172364] [2021-01-06 16:00:53,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:00:53,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:00:54,126 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:00:54,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305172364] [2021-01-06 16:00:54,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637170169] [2021-01-06 16:00:54,127 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 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 16:00:54,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:00:54,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:00:54,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 23 conjunts are in the unsatisfiable core [2021-01-06 16:00:54,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:00:54,249 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:00:54,250 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:00:54,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-01-06 16:00:54,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547142783] [2021-01-06 16:00:54,252 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-01-06 16:00:54,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:00:54,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-01-06 16:00:54,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-01-06 16:00:54,253 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 25 states. [2021-01-06 16:00:54,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:00:54,292 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2021-01-06 16:00:54,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-06 16:00:54,293 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2021-01-06 16:00:54,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:00:54,293 INFO L225 Difference]: With dead ends: 39 [2021-01-06 16:00:54,293 INFO L226 Difference]: Without dead ends: 32 [2021-01-06 16:00:54,295 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-01-06 16:00:54,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-01-06 16:00:54,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-01-06 16:00:54,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-01-06 16:00:54,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2021-01-06 16:00:54,300 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 29 [2021-01-06 16:00:54,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:00:54,300 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2021-01-06 16:00:54,301 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2021-01-06 16:00:54,301 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2021-01-06 16:00:54,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-01-06 16:00:54,301 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:00:54,301 INFO L422 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:00:54,516 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-01-06 16:00:54,517 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:00:54,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:00:54,518 INFO L82 PathProgramCache]: Analyzing trace with hash 1095765134, now seen corresponding path program 21 times [2021-01-06 16:00:54,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:00:54,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969551384] [2021-01-06 16:00:54,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:00:54,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:00:54,869 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:00:54,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969551384] [2021-01-06 16:00:54,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519401962] [2021-01-06 16:00:54,870 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 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 16:00:54,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-01-06 16:00:54,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:00:54,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 16:00:54,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:00:55,023 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:00:55,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:00:55,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-01-06 16:00:55,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973320637] [2021-01-06 16:00:55,025 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-01-06 16:00:55,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:00:55,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-01-06 16:00:55,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-01-06 16:00:55,026 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 26 states. [2021-01-06 16:00:55,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:00:55,065 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2021-01-06 16:00:55,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-06 16:00:55,066 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2021-01-06 16:00:55,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:00:55,066 INFO L225 Difference]: With dead ends: 40 [2021-01-06 16:00:55,067 INFO L226 Difference]: Without dead ends: 33 [2021-01-06 16:00:55,067 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 30 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 16:00:55,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-01-06 16:00:55,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-01-06 16:00:55,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 16:00:55,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2021-01-06 16:00:55,071 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 30 [2021-01-06 16:00:55,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:00:55,072 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2021-01-06 16:00:55,072 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2021-01-06 16:00:55,072 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2021-01-06 16:00:55,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-01-06 16:00:55,072 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:00:55,072 INFO L422 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:00:55,286 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:00:55,287 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:00:55,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:00:55,287 INFO L82 PathProgramCache]: Analyzing trace with hash 1529900398, now seen corresponding path program 22 times [2021-01-06 16:00:55,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:00:55,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016896935] [2021-01-06 16:00:55,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:00:55,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:00:55,724 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:00:55,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016896935] [2021-01-06 16:00:55,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516036419] [2021-01-06 16:00:55,724 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 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 16:00:55,791 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:00:55,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:00:55,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 25 conjunts are in the unsatisfiable core [2021-01-06 16:00:55,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:00:55,858 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:00:55,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:00:55,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-01-06 16:00:55,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273896067] [2021-01-06 16:00:55,859 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-01-06 16:00:55,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:00:55,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-01-06 16:00:55,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-01-06 16:00:55,861 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 27 states. [2021-01-06 16:00:55,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:00:55,903 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2021-01-06 16:00:55,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 16:00:55,904 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2021-01-06 16:00:55,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:00:55,904 INFO L225 Difference]: With dead ends: 41 [2021-01-06 16:00:55,904 INFO L226 Difference]: Without dead ends: 34 [2021-01-06 16:00:55,905 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 31 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 16:00:55,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-01-06 16:00:55,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-01-06 16:00:55,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-01-06 16:00:55,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2021-01-06 16:00:55,908 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 31 [2021-01-06 16:00:55,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:00:55,909 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2021-01-06 16:00:55,909 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2021-01-06 16:00:55,909 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2021-01-06 16:00:55,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-01-06 16:00:55,909 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:00:55,910 INFO L422 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:00:56,118 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-01-06 16:00:56,119 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:00:56,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:00:56,119 INFO L82 PathProgramCache]: Analyzing trace with hash 2103191694, now seen corresponding path program 23 times [2021-01-06 16:00:56,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:00:56,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456906641] [2021-01-06 16:00:56,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:00:56,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:00:56,557 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:00:56,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456906641] [2021-01-06 16:00:56,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342279729] [2021-01-06 16:00:56,558 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 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 16:00:56,635 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-01-06 16:00:56,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:00:56,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-06 16:00:56,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:00:56,706 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:00:56,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:00:56,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-01-06 16:00:56,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813795881] [2021-01-06 16:00:56,709 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-01-06 16:00:56,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:00:56,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-01-06 16:00:56,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-01-06 16:00:56,711 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 28 states. [2021-01-06 16:00:56,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:00:56,760 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2021-01-06 16:00:56,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-06 16:00:56,761 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2021-01-06 16:00:56,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:00:56,761 INFO L225 Difference]: With dead ends: 42 [2021-01-06 16:00:56,762 INFO L226 Difference]: Without dead ends: 35 [2021-01-06 16:00:56,762 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 32 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 16:00:56,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-01-06 16:00:56,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-01-06 16:00:56,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-01-06 16:00:56,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2021-01-06 16:00:56,769 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 32 [2021-01-06 16:00:56,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:00:56,770 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2021-01-06 16:00:56,770 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2021-01-06 16:00:56,770 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2021-01-06 16:00:56,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-01-06 16:00:56,770 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:00:56,770 INFO L422 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:00:56,983 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:00:56,984 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:00:56,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:00:56,984 INFO L82 PathProgramCache]: Analyzing trace with hash -1599614610, now seen corresponding path program 24 times [2021-01-06 16:00:56,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:00:56,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780836069] [2021-01-06 16:00:56,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:00:57,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:00:57,448 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 16:00:57,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780836069] [2021-01-06 16:00:57,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639415366] [2021-01-06 16:00:57,449 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 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 16:00:57,538 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-01-06 16:00:57,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:00:57,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 27 conjunts are in the unsatisfiable core [2021-01-06 16:00:57,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:00:57,607 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 16:00:57,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:00:57,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-01-06 16:00:57,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471014891] [2021-01-06 16:00:57,608 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-01-06 16:00:57,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:00:57,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-01-06 16:00:57,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-01-06 16:00:57,610 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 29 states. [2021-01-06 16:00:57,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:00:57,656 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2021-01-06 16:00:57,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-06 16:00:57,657 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2021-01-06 16:00:57,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:00:57,657 INFO L225 Difference]: With dead ends: 43 [2021-01-06 16:00:57,658 INFO L226 Difference]: Without dead ends: 36 [2021-01-06 16:00:57,658 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 33 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 16:00:57,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-01-06 16:00:57,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-01-06 16:00:57,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-01-06 16:00:57,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2021-01-06 16:00:57,662 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 33 [2021-01-06 16:00:57,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:00:57,662 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2021-01-06 16:00:57,662 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2021-01-06 16:00:57,662 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2021-01-06 16:00:57,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-01-06 16:00:57,662 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:00:57,663 INFO L422 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:00:57,876 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-01-06 16:00:57,877 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:00:57,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:00:57,878 INFO L82 PathProgramCache]: Analyzing trace with hash -422493042, now seen corresponding path program 25 times [2021-01-06 16:00:57,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:00:57,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489810478] [2021-01-06 16:00:57,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:00:57,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:00:58,348 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:00:58,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489810478] [2021-01-06 16:00:58,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622769250] [2021-01-06 16:00:58,349 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 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 16:00:58,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:00:58,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 28 conjunts are in the unsatisfiable core [2021-01-06 16:00:58,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:00:58,504 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:00:58,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:00:58,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-01-06 16:00:58,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441802429] [2021-01-06 16:00:58,505 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-01-06 16:00:58,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:00:58,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-01-06 16:00:58,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-01-06 16:00:58,506 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 30 states. [2021-01-06 16:00:58,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:00:58,562 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2021-01-06 16:00:58,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-06 16:00:58,563 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 34 [2021-01-06 16:00:58,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:00:58,563 INFO L225 Difference]: With dead ends: 44 [2021-01-06 16:00:58,564 INFO L226 Difference]: Without dead ends: 37 [2021-01-06 16:00:58,566 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 34 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 16:00:58,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-01-06 16:00:58,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-01-06 16:00:58,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-01-06 16:00:58,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2021-01-06 16:00:58,584 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 34 [2021-01-06 16:00:58,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:00:58,584 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2021-01-06 16:00:58,584 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2021-01-06 16:00:58,584 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2021-01-06 16:00:58,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-01-06 16:00:58,585 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:00:58,585 INFO L422 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:00:58,802 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-01-06 16:00:58,803 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:00:58,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:00:58,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1708537198, now seen corresponding path program 26 times [2021-01-06 16:00:58,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:00:58,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753190666] [2021-01-06 16:00:58,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:00:58,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:00:59,316 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:00:59,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753190666] [2021-01-06 16:00:59,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934185240] [2021-01-06 16:00:59,317 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 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 16:00:59,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:00:59,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:00:59,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 29 conjunts are in the unsatisfiable core [2021-01-06 16:00:59,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:00:59,454 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:00:59,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:00:59,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-01-06 16:00:59,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212259740] [2021-01-06 16:00:59,455 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-01-06 16:00:59,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:00:59,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-01-06 16:00:59,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2021-01-06 16:00:59,456 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 31 states. [2021-01-06 16:00:59,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:00:59,505 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2021-01-06 16:00:59,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-06 16:00:59,506 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 35 [2021-01-06 16:00:59,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:00:59,507 INFO L225 Difference]: With dead ends: 45 [2021-01-06 16:00:59,507 INFO L226 Difference]: Without dead ends: 38 [2021-01-06 16:00:59,507 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 35 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 16:00:59,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-01-06 16:00:59,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-01-06 16:00:59,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-01-06 16:00:59,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2021-01-06 16:00:59,511 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 35 [2021-01-06 16:00:59,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:00:59,511 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2021-01-06 16:00:59,511 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2021-01-06 16:00:59,511 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2021-01-06 16:00:59,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-01-06 16:00:59,512 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:00:59,512 INFO L422 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:00:59,725 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-01-06 16:00:59,726 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:00:59,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:00:59,726 INFO L82 PathProgramCache]: Analyzing trace with hash -949002098, now seen corresponding path program 27 times [2021-01-06 16:00:59,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:00:59,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381113151] [2021-01-06 16:00:59,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:00:59,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:00,251 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:00,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381113151] [2021-01-06 16:01:00,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596109076] [2021-01-06 16:01:00,252 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 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 16:01:00,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-01-06 16:01:00,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:01:00,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 30 conjunts are in the unsatisfiable core [2021-01-06 16:01:00,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:01:00,426 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:00,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:01:00,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-01-06 16:01:00,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494357691] [2021-01-06 16:01:00,427 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-01-06 16:01:00,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:01:00,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-01-06 16:01:00,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-01-06 16:01:00,428 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 32 states. [2021-01-06 16:01:00,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:01:00,475 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2021-01-06 16:01:00,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-06 16:01:00,475 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 36 [2021-01-06 16:01:00,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:01:00,476 INFO L225 Difference]: With dead ends: 46 [2021-01-06 16:01:00,476 INFO L226 Difference]: Without dead ends: 39 [2021-01-06 16:01:00,477 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-01-06 16:01:00,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-01-06 16:01:00,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-01-06 16:01:00,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-01-06 16:01:00,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2021-01-06 16:01:00,479 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 36 [2021-01-06 16:01:00,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:01:00,479 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2021-01-06 16:01:00,479 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2021-01-06 16:01:00,480 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2021-01-06 16:01:00,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-01-06 16:01:00,480 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:00,480 INFO L422 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:00,693 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:01:00,694 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:00,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:00,695 INFO L82 PathProgramCache]: Analyzing trace with hash -1728341650, now seen corresponding path program 28 times [2021-01-06 16:01:00,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:00,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313959863] [2021-01-06 16:01:00,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:00,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:01,317 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:01,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313959863] [2021-01-06 16:01:01,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035046473] [2021-01-06 16:01:01,318 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 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 16:01:01,383 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:01:01,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:01:01,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 31 conjunts are in the unsatisfiable core [2021-01-06 16:01:01,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:01:01,458 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:01,458 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:01:01,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-01-06 16:01:01,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873004802] [2021-01-06 16:01:01,459 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-01-06 16:01:01,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:01:01,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-01-06 16:01:01,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 16:01:01,460 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 33 states. [2021-01-06 16:01:01,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:01:01,511 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2021-01-06 16:01:01,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-06 16:01:01,512 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 37 [2021-01-06 16:01:01,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:01:01,512 INFO L225 Difference]: With dead ends: 47 [2021-01-06 16:01:01,513 INFO L226 Difference]: Without dead ends: 40 [2021-01-06 16:01:01,513 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 37 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 16:01:01,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-01-06 16:01:01,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-01-06 16:01:01,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2021-01-06 16:01:01,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2021-01-06 16:01:01,522 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 37 [2021-01-06 16:01:01,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:01:01,522 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2021-01-06 16:01:01,522 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2021-01-06 16:01:01,522 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2021-01-06 16:01:01,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-06 16:01:01,523 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:01,523 INFO L422 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:01,738 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-01-06 16:01:01,739 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:01,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:01,739 INFO L82 PathProgramCache]: Analyzing trace with hash -118063986, now seen corresponding path program 29 times [2021-01-06 16:01:01,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:01,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342988035] [2021-01-06 16:01:01,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:01,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:02,411 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:02,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342988035] [2021-01-06 16:01:02,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100622316] [2021-01-06 16:01:02,412 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 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 16:01:02,496 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-01-06 16:01:02,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:01:02,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 32 conjunts are in the unsatisfiable core [2021-01-06 16:01:02,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:01:02,567 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:02,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:01:02,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-01-06 16:01:02,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93695462] [2021-01-06 16:01:02,569 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-01-06 16:01:02,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:01:02,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-01-06 16:01:02,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 16:01:02,570 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 34 states. [2021-01-06 16:01:02,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:01:02,629 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2021-01-06 16:01:02,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-01-06 16:01:02,630 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 38 [2021-01-06 16:01:02,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:01:02,631 INFO L225 Difference]: With dead ends: 48 [2021-01-06 16:01:02,631 INFO L226 Difference]: Without dead ends: 41 [2021-01-06 16:01:02,632 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 16:01:02,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-01-06 16:01:02,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-01-06 16:01:02,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2021-01-06 16:01:02,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2021-01-06 16:01:02,635 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 38 [2021-01-06 16:01:02,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:01:02,635 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2021-01-06 16:01:02,635 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2021-01-06 16:01:02,635 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2021-01-06 16:01:02,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-01-06 16:01:02,636 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:02,636 INFO L422 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:02,850 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:01:02,851 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:02,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:02,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1739063954, now seen corresponding path program 30 times [2021-01-06 16:01:02,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:02,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443411691] [2021-01-06 16:01:02,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:02,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:03,579 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:03,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443411691] [2021-01-06 16:01:03,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659850877] [2021-01-06 16:01:03,580 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 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 16:01:03,665 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-01-06 16:01:03,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:01:03,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 33 conjunts are in the unsatisfiable core [2021-01-06 16:01:03,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:01:03,737 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:03,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:01:03,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-01-06 16:01:03,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613147125] [2021-01-06 16:01:03,739 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-01-06 16:01:03,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:01:03,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-01-06 16:01:03,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 16:01:03,740 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 35 states. [2021-01-06 16:01:03,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:01:03,792 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2021-01-06 16:01:03,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-06 16:01:03,793 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 39 [2021-01-06 16:01:03,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:01:03,793 INFO L225 Difference]: With dead ends: 49 [2021-01-06 16:01:03,793 INFO L226 Difference]: Without dead ends: 42 [2021-01-06 16:01:03,794 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 16:01:03,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-01-06 16:01:03,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-01-06 16:01:03,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-01-06 16:01:03,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2021-01-06 16:01:03,797 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 39 [2021-01-06 16:01:03,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:01:03,797 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2021-01-06 16:01:03,797 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2021-01-06 16:01:03,797 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2021-01-06 16:01:03,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-01-06 16:01:03,798 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:03,798 INFO L422 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:04,012 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-01-06 16:01:04,013 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:04,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:04,013 INFO L82 PathProgramCache]: Analyzing trace with hash -450455410, now seen corresponding path program 31 times [2021-01-06 16:01:04,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:04,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552139989] [2021-01-06 16:01:04,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:04,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:04,789 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:04,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552139989] [2021-01-06 16:01:04,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108739121] [2021-01-06 16:01:04,791 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 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 16:01:04,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:04,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 34 conjunts are in the unsatisfiable core [2021-01-06 16:01:04,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:01:04,943 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:04,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:01:04,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-01-06 16:01:04,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007154059] [2021-01-06 16:01:04,944 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-01-06 16:01:04,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:01:04,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-01-06 16:01:04,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 16:01:04,945 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 36 states. [2021-01-06 16:01:04,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:01:04,989 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2021-01-06 16:01:04,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-01-06 16:01:04,989 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 40 [2021-01-06 16:01:04,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:01:04,990 INFO L225 Difference]: With dead ends: 50 [2021-01-06 16:01:04,990 INFO L226 Difference]: Without dead ends: 43 [2021-01-06 16:01:04,991 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 16:01:04,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-01-06 16:01:04,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-01-06 16:01:04,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2021-01-06 16:01:04,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2021-01-06 16:01:04,993 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 40 [2021-01-06 16:01:04,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:01:04,994 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2021-01-06 16:01:04,994 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2021-01-06 16:01:04,994 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2021-01-06 16:01:04,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-01-06 16:01:04,994 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:04,995 INFO L422 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:05,209 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-01-06 16:01:05,210 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:05,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:05,210 INFO L82 PathProgramCache]: Analyzing trace with hash 841703790, now seen corresponding path program 32 times [2021-01-06 16:01:05,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:05,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771140888] [2021-01-06 16:01:05,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:05,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:05,880 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:05,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771140888] [2021-01-06 16:01:05,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139139990] [2021-01-06 16:01:05,881 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 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 16:01:05,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:01:05,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:01:05,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 35 conjunts are in the unsatisfiable core [2021-01-06 16:01:05,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:01:06,041 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:06,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:01:06,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-01-06 16:01:06,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341208245] [2021-01-06 16:01:06,042 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-01-06 16:01:06,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:01:06,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-01-06 16:01:06,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 16:01:06,043 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 37 states. [2021-01-06 16:01:06,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:01:06,091 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2021-01-06 16:01:06,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-01-06 16:01:06,092 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 41 [2021-01-06 16:01:06,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:01:06,092 INFO L225 Difference]: With dead ends: 51 [2021-01-06 16:01:06,092 INFO L226 Difference]: Without dead ends: 44 [2021-01-06 16:01:06,093 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 16:01:06,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-01-06 16:01:06,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-01-06 16:01:06,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-01-06 16:01:06,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2021-01-06 16:01:06,096 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 41 [2021-01-06 16:01:06,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:01:06,096 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2021-01-06 16:01:06,096 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2021-01-06 16:01:06,096 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2021-01-06 16:01:06,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-01-06 16:01:06,096 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:06,097 INFO L422 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:06,309 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-01-06 16:01:06,310 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:06,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:06,311 INFO L82 PathProgramCache]: Analyzing trace with hash -2051033970, now seen corresponding path program 33 times [2021-01-06 16:01:06,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:06,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678115285] [2021-01-06 16:01:06,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:06,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:07,159 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:07,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678115285] [2021-01-06 16:01:07,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121444374] [2021-01-06 16:01:07,159 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 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 16:01:07,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-01-06 16:01:07,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:01:07,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 36 conjunts are in the unsatisfiable core [2021-01-06 16:01:07,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:01:07,327 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:07,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:01:07,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-01-06 16:01:07,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450717179] [2021-01-06 16:01:07,328 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-01-06 16:01:07,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:01:07,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-01-06 16:01:07,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 16:01:07,330 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 38 states. [2021-01-06 16:01:07,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:01:07,382 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2021-01-06 16:01:07,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-01-06 16:01:07,383 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 42 [2021-01-06 16:01:07,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:01:07,383 INFO L225 Difference]: With dead ends: 52 [2021-01-06 16:01:07,384 INFO L226 Difference]: Without dead ends: 45 [2021-01-06 16:01:07,384 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 42 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 16:01:07,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-01-06 16:01:07,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-01-06 16:01:07,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-01-06 16:01:07,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2021-01-06 16:01:07,387 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 42 [2021-01-06 16:01:07,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:01:07,387 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2021-01-06 16:01:07,387 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2021-01-06 16:01:07,388 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2021-01-06 16:01:07,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-06 16:01:07,388 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:07,388 INFO L422 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:07,602 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-01-06 16:01:07,603 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:07,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:07,604 INFO L82 PathProgramCache]: Analyzing trace with hash -1531591314, now seen corresponding path program 34 times [2021-01-06 16:01:07,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:07,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505310625] [2021-01-06 16:01:07,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:07,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:08,483 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:08,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505310625] [2021-01-06 16:01:08,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714062170] [2021-01-06 16:01:08,484 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 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 16:01:08,577 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:01:08,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:01:08,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 37 conjunts are in the unsatisfiable core [2021-01-06 16:01:08,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:01:08,652 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:08,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:01:08,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2021-01-06 16:01:08,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973431515] [2021-01-06 16:01:08,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-01-06 16:01:08,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:01:08,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-01-06 16:01:08,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-01-06 16:01:08,654 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 39 states. [2021-01-06 16:01:08,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:01:08,717 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2021-01-06 16:01:08,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-01-06 16:01:08,718 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 43 [2021-01-06 16:01:08,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:01:08,719 INFO L225 Difference]: With dead ends: 53 [2021-01-06 16:01:08,719 INFO L226 Difference]: Without dead ends: 46 [2021-01-06 16:01:08,719 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-01-06 16:01:08,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-01-06 16:01:08,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-01-06 16:01:08,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2021-01-06 16:01:08,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2021-01-06 16:01:08,722 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 43 [2021-01-06 16:01:08,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:01:08,722 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2021-01-06 16:01:08,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2021-01-06 16:01:08,722 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2021-01-06 16:01:08,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-01-06 16:01:08,723 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:08,723 INFO L422 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:08,936 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-01-06 16:01:08,937 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:08,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:08,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1686229134, now seen corresponding path program 35 times [2021-01-06 16:01:08,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:08,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406140696] [2021-01-06 16:01:08,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:08,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:09,734 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:09,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406140696] [2021-01-06 16:01:09,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193608613] [2021-01-06 16:01:09,735 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 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 16:01:09,840 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2021-01-06 16:01:09,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:01:09,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 38 conjunts are in the unsatisfiable core [2021-01-06 16:01:09,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:01:09,923 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:09,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:01:09,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2021-01-06 16:01:09,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812654779] [2021-01-06 16:01:09,926 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-01-06 16:01:09,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:01:09,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-01-06 16:01:09,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 16:01:09,927 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 40 states. [2021-01-06 16:01:09,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:01:09,970 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2021-01-06 16:01:09,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-01-06 16:01:09,970 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 44 [2021-01-06 16:01:09,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:01:09,971 INFO L225 Difference]: With dead ends: 54 [2021-01-06 16:01:09,971 INFO L226 Difference]: Without dead ends: 47 [2021-01-06 16:01:09,972 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 16:01:09,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-01-06 16:01:09,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-01-06 16:01:09,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2021-01-06 16:01:09,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2021-01-06 16:01:09,975 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 44 [2021-01-06 16:01:09,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:01:09,975 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2021-01-06 16:01:09,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2021-01-06 16:01:09,975 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2021-01-06 16:01:09,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-01-06 16:01:09,976 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:09,976 INFO L422 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:10,189 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-01-06 16:01:10,190 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:10,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:10,190 INFO L82 PathProgramCache]: Analyzing trace with hash -1640552082, now seen corresponding path program 36 times [2021-01-06 16:01:10,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:10,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499530080] [2021-01-06 16:01:10,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:10,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:11,015 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:11,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499530080] [2021-01-06 16:01:11,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353497512] [2021-01-06 16:01:11,016 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 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 16:01:11,117 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2021-01-06 16:01:11,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:01:11,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 39 conjunts are in the unsatisfiable core [2021-01-06 16:01:11,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:01:11,201 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:11,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:01:11,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2021-01-06 16:01:11,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291495766] [2021-01-06 16:01:11,202 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-01-06 16:01:11,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:01:11,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-01-06 16:01:11,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 16:01:11,203 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 41 states. [2021-01-06 16:01:11,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:01:11,271 INFO L93 Difference]: Finished difference Result 55 states and 57 transitions. [2021-01-06 16:01:11,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-01-06 16:01:11,271 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 45 [2021-01-06 16:01:11,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:01:11,272 INFO L225 Difference]: With dead ends: 55 [2021-01-06 16:01:11,272 INFO L226 Difference]: Without dead ends: 48 [2021-01-06 16:01:11,273 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 16:01:11,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-01-06 16:01:11,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-01-06 16:01:11,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-01-06 16:01:11,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2021-01-06 16:01:11,276 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 45 [2021-01-06 16:01:11,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:01:11,276 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2021-01-06 16:01:11,276 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2021-01-06 16:01:11,276 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2021-01-06 16:01:11,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-01-06 16:01:11,277 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:11,277 INFO L422 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:11,491 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-01-06 16:01:11,492 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:11,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:11,492 INFO L82 PathProgramCache]: Analyzing trace with hash -1691554674, now seen corresponding path program 37 times [2021-01-06 16:01:11,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:11,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999969947] [2021-01-06 16:01:11,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:11,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:12,383 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:12,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999969947] [2021-01-06 16:01:12,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439261813] [2021-01-06 16:01:12,384 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 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 16:01:12,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:12,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 40 conjunts are in the unsatisfiable core [2021-01-06 16:01:12,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:01:12,553 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:12,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:01:12,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2021-01-06 16:01:12,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207751365] [2021-01-06 16:01:12,554 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-01-06 16:01:12,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:01:12,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-01-06 16:01:12,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-01-06 16:01:12,555 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 42 states. [2021-01-06 16:01:12,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:01:12,610 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2021-01-06 16:01:12,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-01-06 16:01:12,610 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 46 [2021-01-06 16:01:12,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:01:12,611 INFO L225 Difference]: With dead ends: 56 [2021-01-06 16:01:12,611 INFO L226 Difference]: Without dead ends: 49 [2021-01-06 16:01:12,612 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-01-06 16:01:12,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-01-06 16:01:12,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-01-06 16:01:12,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2021-01-06 16:01:12,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2021-01-06 16:01:12,615 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 46 [2021-01-06 16:01:12,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:01:12,615 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2021-01-06 16:01:12,615 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2021-01-06 16:01:12,615 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2021-01-06 16:01:12,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-01-06 16:01:12,616 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:12,616 INFO L422 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:12,830 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-01-06 16:01:12,831 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:12,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:12,831 INFO L82 PathProgramCache]: Analyzing trace with hash 1022332270, now seen corresponding path program 38 times [2021-01-06 16:01:12,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:12,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277366309] [2021-01-06 16:01:12,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:12,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:13,768 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:13,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277366309] [2021-01-06 16:01:13,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682283587] [2021-01-06 16:01:13,769 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 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 16:01:13,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:01:13,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:01:13,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 41 conjunts are in the unsatisfiable core [2021-01-06 16:01:13,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:01:13,927 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:13,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:01:13,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2021-01-06 16:01:13,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751147211] [2021-01-06 16:01:13,928 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-01-06 16:01:13,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:01:13,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-01-06 16:01:13,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2021-01-06 16:01:13,930 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 43 states. [2021-01-06 16:01:13,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:01:13,977 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2021-01-06 16:01:13,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-01-06 16:01:13,978 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 47 [2021-01-06 16:01:13,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:01:13,978 INFO L225 Difference]: With dead ends: 57 [2021-01-06 16:01:13,978 INFO L226 Difference]: Without dead ends: 50 [2021-01-06 16:01:13,979 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2021-01-06 16:01:13,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-01-06 16:01:13,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-01-06 16:01:13,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2021-01-06 16:01:13,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2021-01-06 16:01:13,982 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 47 [2021-01-06 16:01:13,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:01:13,982 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2021-01-06 16:01:13,982 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2021-01-06 16:01:13,983 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2021-01-06 16:01:13,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-06 16:01:13,983 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:13,983 INFO L422 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:14,198 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:01:14,198 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:14,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:14,199 INFO L82 PathProgramCache]: Analyzing trace with hash -746518386, now seen corresponding path program 39 times [2021-01-06 16:01:14,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:14,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321073620] [2021-01-06 16:01:14,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:14,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:15,220 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:15,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321073620] [2021-01-06 16:01:15,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108964070] [2021-01-06 16:01:15,221 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 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 16:01:15,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2021-01-06 16:01:15,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:01:15,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 42 conjunts are in the unsatisfiable core [2021-01-06 16:01:15,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:01:15,402 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:15,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:01:15,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2021-01-06 16:01:15,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052085490] [2021-01-06 16:01:15,403 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-01-06 16:01:15,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:01:15,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-01-06 16:01:15,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2021-01-06 16:01:15,405 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 44 states. [2021-01-06 16:01:15,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:01:15,469 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2021-01-06 16:01:15,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-01-06 16:01:15,470 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 48 [2021-01-06 16:01:15,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:01:15,470 INFO L225 Difference]: With dead ends: 58 [2021-01-06 16:01:15,471 INFO L226 Difference]: Without dead ends: 51 [2021-01-06 16:01:15,471 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2021-01-06 16:01:15,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-01-06 16:01:15,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-01-06 16:01:15,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2021-01-06 16:01:15,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2021-01-06 16:01:15,474 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 48 [2021-01-06 16:01:15,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:01:15,474 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2021-01-06 16:01:15,475 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2021-01-06 16:01:15,475 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2021-01-06 16:01:15,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-01-06 16:01:15,475 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:15,475 INFO L422 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:15,689 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:01:15,690 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:15,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:15,690 INFO L82 PathProgramCache]: Analyzing trace with hash 253686126, now seen corresponding path program 40 times [2021-01-06 16:01:15,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:15,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049541962] [2021-01-06 16:01:15,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:15,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:16,800 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:16,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049541962] [2021-01-06 16:01:16,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958788101] [2021-01-06 16:01:16,800 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 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 16:01:16,893 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:01:16,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:01:16,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 43 conjunts are in the unsatisfiable core [2021-01-06 16:01:16,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:01:16,969 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:16,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:01:16,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2021-01-06 16:01:16,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628375192] [2021-01-06 16:01:16,971 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-01-06 16:01:16,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:01:16,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-01-06 16:01:16,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2021-01-06 16:01:16,973 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 45 states. [2021-01-06 16:01:17,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:01:17,045 INFO L93 Difference]: Finished difference Result 59 states and 61 transitions. [2021-01-06 16:01:17,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-01-06 16:01:17,045 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 49 [2021-01-06 16:01:17,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:01:17,046 INFO L225 Difference]: With dead ends: 59 [2021-01-06 16:01:17,046 INFO L226 Difference]: Without dead ends: 52 [2021-01-06 16:01:17,050 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 49 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 16:01:17,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-01-06 16:01:17,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-01-06 16:01:17,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2021-01-06 16:01:17,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2021-01-06 16:01:17,057 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 49 [2021-01-06 16:01:17,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:01:17,064 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2021-01-06 16:01:17,064 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2021-01-06 16:01:17,064 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2021-01-06 16:01:17,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-01-06 16:01:17,065 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:17,065 INFO L422 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:17,278 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-01-06 16:01:17,279 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:17,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:17,280 INFO L82 PathProgramCache]: Analyzing trace with hash 1195254926, now seen corresponding path program 41 times [2021-01-06 16:01:17,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:17,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355285548] [2021-01-06 16:01:17,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:17,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:18,547 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:18,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355285548] [2021-01-06 16:01:18,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453592315] [2021-01-06 16:01:18,548 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 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 16:01:18,646 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2021-01-06 16:01:18,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:01:18,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 44 conjunts are in the unsatisfiable core [2021-01-06 16:01:18,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:01:18,728 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:18,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:01:18,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2021-01-06 16:01:18,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319918795] [2021-01-06 16:01:18,729 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-01-06 16:01:18,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:01:18,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-01-06 16:01:18,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2021-01-06 16:01:18,731 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand 46 states. [2021-01-06 16:01:18,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:01:18,783 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2021-01-06 16:01:18,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-01-06 16:01:18,783 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 50 [2021-01-06 16:01:18,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:01:18,784 INFO L225 Difference]: With dead ends: 60 [2021-01-06 16:01:18,784 INFO L226 Difference]: Without dead ends: 53 [2021-01-06 16:01:18,785 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2021-01-06 16:01:18,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-01-06 16:01:18,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-01-06 16:01:18,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2021-01-06 16:01:18,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2021-01-06 16:01:18,788 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 50 [2021-01-06 16:01:18,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:01:18,788 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2021-01-06 16:01:18,788 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2021-01-06 16:01:18,788 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2021-01-06 16:01:18,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-01-06 16:01:18,789 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:18,789 INFO L422 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:19,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:01:19,003 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:19,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:19,004 INFO L82 PathProgramCache]: Analyzing trace with hash 319116654, now seen corresponding path program 42 times [2021-01-06 16:01:19,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:19,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823697162] [2021-01-06 16:01:19,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:19,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:20,228 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:20,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823697162] [2021-01-06 16:01:20,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280741021] [2021-01-06 16:01:20,229 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 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 16:01:20,339 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2021-01-06 16:01:20,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:01:20,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 45 conjunts are in the unsatisfiable core [2021-01-06 16:01:20,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:01:20,418 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:20,419 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:01:20,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 47 [2021-01-06 16:01:20,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139625832] [2021-01-06 16:01:20,419 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-01-06 16:01:20,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:01:20,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-01-06 16:01:20,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2021-01-06 16:01:20,421 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 47 states. [2021-01-06 16:01:20,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:01:20,482 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2021-01-06 16:01:20,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-01-06 16:01:20,482 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 51 [2021-01-06 16:01:20,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:01:20,483 INFO L225 Difference]: With dead ends: 61 [2021-01-06 16:01:20,483 INFO L226 Difference]: Without dead ends: 54 [2021-01-06 16:01:20,484 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2021-01-06 16:01:20,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-01-06 16:01:20,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-01-06 16:01:20,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2021-01-06 16:01:20,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2021-01-06 16:01:20,486 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 51 [2021-01-06 16:01:20,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:01:20,487 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2021-01-06 16:01:20,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2021-01-06 16:01:20,487 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2021-01-06 16:01:20,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-01-06 16:01:20,487 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:20,487 INFO L422 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:20,701 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:01:20,702 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:20,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:20,702 INFO L82 PathProgramCache]: Analyzing trace with hash -1071366002, now seen corresponding path program 43 times [2021-01-06 16:01:20,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:20,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461692946] [2021-01-06 16:01:20,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:20,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:22,063 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:22,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461692946] [2021-01-06 16:01:22,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60132009] [2021-01-06 16:01:22,064 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 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 16:01:22,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:22,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 46 conjunts are in the unsatisfiable core [2021-01-06 16:01:22,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:01:22,238 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:22,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:01:22,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2021-01-06 16:01:22,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494422466] [2021-01-06 16:01:22,239 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-01-06 16:01:22,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:01:22,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-01-06 16:01:22,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2021-01-06 16:01:22,240 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 48 states. [2021-01-06 16:01:22,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:01:22,317 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2021-01-06 16:01:22,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-01-06 16:01:22,318 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 52 [2021-01-06 16:01:22,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:01:22,319 INFO L225 Difference]: With dead ends: 62 [2021-01-06 16:01:22,319 INFO L226 Difference]: Without dead ends: 55 [2021-01-06 16:01:22,320 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2021-01-06 16:01:22,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-01-06 16:01:22,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-01-06 16:01:22,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2021-01-06 16:01:22,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2021-01-06 16:01:22,322 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 52 [2021-01-06 16:01:22,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:01:22,323 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2021-01-06 16:01:22,323 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2021-01-06 16:01:22,323 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2021-01-06 16:01:22,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-06 16:01:22,324 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:22,324 INFO L422 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:22,530 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-01-06 16:01:22,531 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:22,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:22,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1226655378, now seen corresponding path program 44 times [2021-01-06 16:01:22,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:22,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715512080] [2021-01-06 16:01:22,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:22,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:23,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:23,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715512080] [2021-01-06 16:01:23,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278859485] [2021-01-06 16:01:23,947 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 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 16:01:24,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:01:24,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:01:24,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 47 conjunts are in the unsatisfiable core [2021-01-06 16:01:24,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:01:24,147 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:24,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:01:24,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 49 [2021-01-06 16:01:24,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4296554] [2021-01-06 16:01:24,149 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-01-06 16:01:24,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:01:24,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-01-06 16:01:24,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-01-06 16:01:24,150 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 49 states. [2021-01-06 16:01:24,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:01:24,213 INFO L93 Difference]: Finished difference Result 63 states and 65 transitions. [2021-01-06 16:01:24,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-01-06 16:01:24,213 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 53 [2021-01-06 16:01:24,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:01:24,214 INFO L225 Difference]: With dead ends: 63 [2021-01-06 16:01:24,214 INFO L226 Difference]: Without dead ends: 56 [2021-01-06 16:01:24,215 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-01-06 16:01:24,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-01-06 16:01:24,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-01-06 16:01:24,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2021-01-06 16:01:24,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2021-01-06 16:01:24,217 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 53 [2021-01-06 16:01:24,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:01:24,218 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2021-01-06 16:01:24,218 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2021-01-06 16:01:24,218 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2021-01-06 16:01:24,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-01-06 16:01:24,219 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:24,219 INFO L422 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:24,432 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-01-06 16:01:24,432 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:24,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:24,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1745658738, now seen corresponding path program 45 times [2021-01-06 16:01:24,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:24,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322385325] [2021-01-06 16:01:24,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:24,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:25,930 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:25,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322385325] [2021-01-06 16:01:25,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824408761] [2021-01-06 16:01:25,931 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 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 16:01:26,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2021-01-06 16:01:26,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:01:26,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 48 conjunts are in the unsatisfiable core [2021-01-06 16:01:26,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:01:26,128 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:26,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:01:26,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 50 [2021-01-06 16:01:26,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959253180] [2021-01-06 16:01:26,129 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-01-06 16:01:26,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:01:26,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-01-06 16:01:26,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2021-01-06 16:01:26,130 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 50 states. [2021-01-06 16:01:26,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:01:26,230 INFO L93 Difference]: Finished difference Result 64 states and 66 transitions. [2021-01-06 16:01:26,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-01-06 16:01:26,233 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 54 [2021-01-06 16:01:26,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:01:26,234 INFO L225 Difference]: With dead ends: 64 [2021-01-06 16:01:26,234 INFO L226 Difference]: Without dead ends: 57 [2021-01-06 16:01:26,234 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2021-01-06 16:01:26,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-01-06 16:01:26,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-01-06 16:01:26,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2021-01-06 16:01:26,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2021-01-06 16:01:26,237 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 54 [2021-01-06 16:01:26,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:01:26,237 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2021-01-06 16:01:26,238 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2021-01-06 16:01:26,238 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2021-01-06 16:01:26,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-01-06 16:01:26,238 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:26,238 INFO L422 BasicCegarLoop]: trace histogram [47, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:26,451 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-01-06 16:01:26,452 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:26,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:26,452 INFO L82 PathProgramCache]: Analyzing trace with hash -654893714, now seen corresponding path program 46 times [2021-01-06 16:01:26,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:26,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523916854] [2021-01-06 16:01:26,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:26,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:27,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:27,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523916854] [2021-01-06 16:01:27,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802524723] [2021-01-06 16:01:27,970 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 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 16:01:28,075 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:01:28,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:01:28,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 49 conjunts are in the unsatisfiable core [2021-01-06 16:01:28,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:01:28,156 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:28,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:01:28,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 51 [2021-01-06 16:01:28,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284979511] [2021-01-06 16:01:28,157 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-01-06 16:01:28,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:01:28,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-01-06 16:01:28,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2021-01-06 16:01:28,159 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 51 states. [2021-01-06 16:01:28,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:01:28,238 INFO L93 Difference]: Finished difference Result 65 states and 67 transitions. [2021-01-06 16:01:28,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-01-06 16:01:28,238 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 55 [2021-01-06 16:01:28,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:01:28,239 INFO L225 Difference]: With dead ends: 65 [2021-01-06 16:01:28,239 INFO L226 Difference]: Without dead ends: 58 [2021-01-06 16:01:28,240 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 55 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 16:01:28,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-01-06 16:01:28,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-01-06 16:01:28,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2021-01-06 16:01:28,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2021-01-06 16:01:28,243 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 55 [2021-01-06 16:01:28,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:01:28,243 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2021-01-06 16:01:28,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2021-01-06 16:01:28,243 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2021-01-06 16:01:28,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-01-06 16:01:28,244 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:28,244 INFO L422 BasicCegarLoop]: trace histogram [48, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:28,459 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:01:28,460 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:28,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:28,460 INFO L82 PathProgramCache]: Analyzing trace with hash -1200916338, now seen corresponding path program 47 times [2021-01-06 16:01:28,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:28,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981775357] [2021-01-06 16:01:28,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:28,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:30,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:30,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981775357] [2021-01-06 16:01:30,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792654406] [2021-01-06 16:01:30,072 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 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 16:01:30,188 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2021-01-06 16:01:30,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:01:30,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 50 conjunts are in the unsatisfiable core [2021-01-06 16:01:30,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:01:30,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:30,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:01:30,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 52 [2021-01-06 16:01:30,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735167934] [2021-01-06 16:01:30,290 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-01-06 16:01:30,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:01:30,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-01-06 16:01:30,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2021-01-06 16:01:30,291 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand 52 states. [2021-01-06 16:01:30,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:01:30,379 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2021-01-06 16:01:30,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-01-06 16:01:30,380 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 56 [2021-01-06 16:01:30,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:01:30,380 INFO L225 Difference]: With dead ends: 66 [2021-01-06 16:01:30,380 INFO L226 Difference]: Without dead ends: 59 [2021-01-06 16:01:30,381 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 56 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 16:01:30,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-01-06 16:01:30,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-01-06 16:01:30,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2021-01-06 16:01:30,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2021-01-06 16:01:30,386 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 56 [2021-01-06 16:01:30,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:01:30,386 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2021-01-06 16:01:30,387 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2021-01-06 16:01:30,387 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2021-01-06 16:01:30,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-01-06 16:01:30,387 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:30,387 INFO L422 BasicCegarLoop]: trace histogram [49, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:30,587 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-01-06 16:01:30,588 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:30,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:30,589 INFO L82 PathProgramCache]: Analyzing trace with hash -947748498, now seen corresponding path program 48 times [2021-01-06 16:01:30,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:30,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720101991] [2021-01-06 16:01:30,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:30,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:32,215 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:32,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720101991] [2021-01-06 16:01:32,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77403833] [2021-01-06 16:01:32,216 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 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 16:01:32,337 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2021-01-06 16:01:32,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:01:32,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 51 conjunts are in the unsatisfiable core [2021-01-06 16:01:32,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:01:32,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:32,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:01:32,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 53 [2021-01-06 16:01:32,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327669164] [2021-01-06 16:01:32,422 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-01-06 16:01:32,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:01:32,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-01-06 16:01:32,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2021-01-06 16:01:32,423 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 53 states. [2021-01-06 16:01:32,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:01:32,524 INFO L93 Difference]: Finished difference Result 67 states and 69 transitions. [2021-01-06 16:01:32,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-01-06 16:01:32,525 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 57 [2021-01-06 16:01:32,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:01:32,531 INFO L225 Difference]: With dead ends: 67 [2021-01-06 16:01:32,531 INFO L226 Difference]: Without dead ends: 60 [2021-01-06 16:01:32,532 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 57 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 16:01:32,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-01-06 16:01:32,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-01-06 16:01:32,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2021-01-06 16:01:32,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2021-01-06 16:01:32,535 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 57 [2021-01-06 16:01:32,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:01:32,535 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2021-01-06 16:01:32,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2021-01-06 16:01:32,535 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2021-01-06 16:01:32,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-06 16:01:32,536 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:32,536 INFO L422 BasicCegarLoop]: trace histogram [50, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:32,744 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:01:32,745 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:32,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:32,746 INFO L82 PathProgramCache]: Analyzing trace with hash -1689480050, now seen corresponding path program 49 times [2021-01-06 16:01:32,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:32,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314992433] [2021-01-06 16:01:32,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:32,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:34,456 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:34,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314992433] [2021-01-06 16:01:34,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123537661] [2021-01-06 16:01:34,456 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 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 16:01:34,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:34,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 52 conjunts are in the unsatisfiable core [2021-01-06 16:01:34,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:01:34,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:34,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:01:34,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 54 [2021-01-06 16:01:34,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083468445] [2021-01-06 16:01:34,662 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-01-06 16:01:34,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:01:34,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-01-06 16:01:34,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2021-01-06 16:01:34,663 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 54 states. [2021-01-06 16:01:34,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:01:34,759 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2021-01-06 16:01:34,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-01-06 16:01:34,761 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 58 [2021-01-06 16:01:34,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:01:34,761 INFO L225 Difference]: With dead ends: 68 [2021-01-06 16:01:34,761 INFO L226 Difference]: Without dead ends: 61 [2021-01-06 16:01:34,762 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 58 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 16:01:34,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-01-06 16:01:34,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2021-01-06 16:01:34,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2021-01-06 16:01:34,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2021-01-06 16:01:34,765 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 58 [2021-01-06 16:01:34,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:01:34,765 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2021-01-06 16:01:34,765 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2021-01-06 16:01:34,765 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2021-01-06 16:01:34,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-01-06 16:01:34,766 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:34,766 INFO L422 BasicCegarLoop]: trace histogram [51, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:34,979 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:01:34,980 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:34,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:34,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1086645614, now seen corresponding path program 50 times [2021-01-06 16:01:34,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:34,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861594908] [2021-01-06 16:01:34,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:34,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:36,765 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:36,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861594908] [2021-01-06 16:01:36,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432426757] [2021-01-06 16:01:36,766 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 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 16:01:36,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:01:36,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:01:36,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 53 conjunts are in the unsatisfiable core [2021-01-06 16:01:36,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:01:36,972 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:36,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:01:36,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 55 [2021-01-06 16:01:36,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776580693] [2021-01-06 16:01:36,973 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-01-06 16:01:36,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:01:36,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-01-06 16:01:36,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2021-01-06 16:01:36,974 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 55 states. [2021-01-06 16:01:37,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:01:37,084 INFO L93 Difference]: Finished difference Result 69 states and 71 transitions. [2021-01-06 16:01:37,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-01-06 16:01:37,090 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 59 [2021-01-06 16:01:37,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:01:37,090 INFO L225 Difference]: With dead ends: 69 [2021-01-06 16:01:37,090 INFO L226 Difference]: Without dead ends: 62 [2021-01-06 16:01:37,091 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 59 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 16:01:37,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-01-06 16:01:37,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-01-06 16:01:37,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2021-01-06 16:01:37,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2021-01-06 16:01:37,094 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 59 [2021-01-06 16:01:37,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:01:37,094 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2021-01-06 16:01:37,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2021-01-06 16:01:37,095 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2021-01-06 16:01:37,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-01-06 16:01:37,095 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:37,095 INFO L422 BasicCegarLoop]: trace histogram [52, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:37,309 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-01-06 16:01:37,310 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:37,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:37,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1247195278, now seen corresponding path program 51 times [2021-01-06 16:01:37,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:37,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415852764] [2021-01-06 16:01:37,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:37,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:39,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:39,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415852764] [2021-01-06 16:01:39,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027941884] [2021-01-06 16:01:39,067 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 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 16:01:39,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2021-01-06 16:01:39,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:01:39,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 54 conjunts are in the unsatisfiable core [2021-01-06 16:01:39,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:01:39,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:39,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:01:39,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 56 [2021-01-06 16:01:39,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361275446] [2021-01-06 16:01:39,315 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2021-01-06 16:01:39,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:01:39,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-01-06 16:01:39,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2021-01-06 16:01:39,317 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand 56 states. [2021-01-06 16:01:39,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:01:39,414 INFO L93 Difference]: Finished difference Result 70 states and 72 transitions. [2021-01-06 16:01:39,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-01-06 16:01:39,415 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 60 [2021-01-06 16:01:39,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:01:39,415 INFO L225 Difference]: With dead ends: 70 [2021-01-06 16:01:39,416 INFO L226 Difference]: Without dead ends: 63 [2021-01-06 16:01:39,416 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 60 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 16:01:39,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-01-06 16:01:39,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-01-06 16:01:39,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2021-01-06 16:01:39,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2021-01-06 16:01:39,419 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 60 [2021-01-06 16:01:39,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:01:39,419 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2021-01-06 16:01:39,419 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2021-01-06 16:01:39,420 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2021-01-06 16:01:39,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-01-06 16:01:39,420 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:39,420 INFO L422 BasicCegarLoop]: trace histogram [53, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:39,634 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:01:39,635 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:39,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:39,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1929267566, now seen corresponding path program 52 times [2021-01-06 16:01:39,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:39,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856110817] [2021-01-06 16:01:39,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:39,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:41,487 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:41,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856110817] [2021-01-06 16:01:41,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56825619] [2021-01-06 16:01:41,487 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 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 16:01:41,598 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:01:41,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:01:41,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 55 conjunts are in the unsatisfiable core [2021-01-06 16:01:41,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:01:41,708 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:41,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:01:41,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 57 [2021-01-06 16:01:41,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783435203] [2021-01-06 16:01:41,709 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2021-01-06 16:01:41,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:01:41,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-01-06 16:01:41,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2021-01-06 16:01:41,710 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 57 states. [2021-01-06 16:01:41,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:01:41,823 INFO L93 Difference]: Finished difference Result 71 states and 73 transitions. [2021-01-06 16:01:41,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-01-06 16:01:41,823 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 61 [2021-01-06 16:01:41,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:01:41,824 INFO L225 Difference]: With dead ends: 71 [2021-01-06 16:01:41,824 INFO L226 Difference]: Without dead ends: 64 [2021-01-06 16:01:41,825 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2021-01-06 16:01:41,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-01-06 16:01:41,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-01-06 16:01:41,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2021-01-06 16:01:41,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2021-01-06 16:01:41,827 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 61 [2021-01-06 16:01:41,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:01:41,828 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2021-01-06 16:01:41,828 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2021-01-06 16:01:41,828 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2021-01-06 16:01:41,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-01-06 16:01:41,828 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:41,828 INFO L422 BasicCegarLoop]: trace histogram [54, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:42,041 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-01-06 16:01:42,042 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:42,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:42,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1598672014, now seen corresponding path program 53 times [2021-01-06 16:01:42,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:42,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705503930] [2021-01-06 16:01:42,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:42,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:43,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:43,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705503930] [2021-01-06 16:01:43,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843328308] [2021-01-06 16:01:43,899 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 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 16:01:44,033 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2021-01-06 16:01:44,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:01:44,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 56 conjunts are in the unsatisfiable core [2021-01-06 16:01:44,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:01:44,143 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:44,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:01:44,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 58 [2021-01-06 16:01:44,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804914147] [2021-01-06 16:01:44,144 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2021-01-06 16:01:44,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:01:44,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-01-06 16:01:44,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2021-01-06 16:01:44,145 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand 58 states. [2021-01-06 16:01:44,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:01:44,244 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2021-01-06 16:01:44,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-01-06 16:01:44,245 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 62 [2021-01-06 16:01:44,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:01:44,246 INFO L225 Difference]: With dead ends: 72 [2021-01-06 16:01:44,246 INFO L226 Difference]: Without dead ends: 65 [2021-01-06 16:01:44,246 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 62 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 16:01:44,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-01-06 16:01:44,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-01-06 16:01:44,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2021-01-06 16:01:44,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2021-01-06 16:01:44,250 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 62 [2021-01-06 16:01:44,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:01:44,250 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2021-01-06 16:01:44,250 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2021-01-06 16:01:44,250 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2021-01-06 16:01:44,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-06 16:01:44,250 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:44,250 INFO L422 BasicCegarLoop]: trace histogram [55, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:44,451 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-01-06 16:01:44,451 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:44,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:44,452 INFO L82 PathProgramCache]: Analyzing trace with hash -59855506, now seen corresponding path program 54 times [2021-01-06 16:01:44,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:44,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096545745] [2021-01-06 16:01:44,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:44,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:46,576 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:46,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096545745] [2021-01-06 16:01:46,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987671944] [2021-01-06 16:01:46,577 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 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 16:01:46,710 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2021-01-06 16:01:46,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:01:46,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 57 conjunts are in the unsatisfiable core [2021-01-06 16:01:46,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:01:46,803 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:46,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:01:46,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 59 [2021-01-06 16:01:46,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314370686] [2021-01-06 16:01:46,804 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2021-01-06 16:01:46,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:01:46,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-01-06 16:01:46,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2021-01-06 16:01:46,805 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 59 states. [2021-01-06 16:01:46,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:01:46,886 INFO L93 Difference]: Finished difference Result 73 states and 75 transitions. [2021-01-06 16:01:46,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-01-06 16:01:46,887 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 63 [2021-01-06 16:01:46,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:01:46,888 INFO L225 Difference]: With dead ends: 73 [2021-01-06 16:01:46,888 INFO L226 Difference]: Without dead ends: 66 [2021-01-06 16:01:46,889 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 63 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 16:01:46,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-01-06 16:01:46,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2021-01-06 16:01:46,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2021-01-06 16:01:46,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2021-01-06 16:01:46,891 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 63 [2021-01-06 16:01:46,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:01:46,891 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2021-01-06 16:01:46,892 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2021-01-06 16:01:46,892 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2021-01-06 16:01:46,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-01-06 16:01:46,892 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:46,892 INFO L422 BasicCegarLoop]: trace histogram [56, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:47,093 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:01:47,093 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:47,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:47,094 INFO L82 PathProgramCache]: Analyzing trace with hash 65398926, now seen corresponding path program 55 times [2021-01-06 16:01:47,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:47,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456648842] [2021-01-06 16:01:47,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:47,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:49,125 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:49,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456648842] [2021-01-06 16:01:49,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730202447] [2021-01-06 16:01:49,125 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 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 16:01:49,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:49,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 58 conjunts are in the unsatisfiable core [2021-01-06 16:01:49,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:01:49,339 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:49,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:01:49,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 60 [2021-01-06 16:01:49,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319213730] [2021-01-06 16:01:49,340 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2021-01-06 16:01:49,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:01:49,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-01-06 16:01:49,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2021-01-06 16:01:49,341 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 60 states. [2021-01-06 16:01:49,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:01:49,422 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2021-01-06 16:01:49,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-01-06 16:01:49,423 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 64 [2021-01-06 16:01:49,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:01:49,424 INFO L225 Difference]: With dead ends: 74 [2021-01-06 16:01:49,424 INFO L226 Difference]: Without dead ends: 67 [2021-01-06 16:01:49,424 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2021-01-06 16:01:49,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-01-06 16:01:49,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2021-01-06 16:01:49,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2021-01-06 16:01:49,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2021-01-06 16:01:49,427 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 64 [2021-01-06 16:01:49,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:01:49,427 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2021-01-06 16:01:49,427 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2021-01-06 16:01:49,427 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2021-01-06 16:01:49,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-01-06 16:01:49,428 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:49,428 INFO L422 BasicCegarLoop]: trace histogram [57, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:49,638 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-01-06 16:01:49,639 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:49,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:49,639 INFO L82 PathProgramCache]: Analyzing trace with hash -346680978, now seen corresponding path program 56 times [2021-01-06 16:01:49,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:49,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468163853] [2021-01-06 16:01:49,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:49,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:51,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:51,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468163853] [2021-01-06 16:01:51,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351264677] [2021-01-06 16:01:51,769 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 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 16:01:51,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:01:51,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:01:51,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 59 conjunts are in the unsatisfiable core [2021-01-06 16:01:51,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:01:51,982 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:51,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:01:51,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 61 [2021-01-06 16:01:51,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424630415] [2021-01-06 16:01:51,983 INFO L461 AbstractCegarLoop]: Interpolant automaton has 61 states [2021-01-06 16:01:51,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:01:51,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-01-06 16:01:51,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2021-01-06 16:01:51,984 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 61 states. [2021-01-06 16:01:52,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:01:52,070 INFO L93 Difference]: Finished difference Result 75 states and 77 transitions. [2021-01-06 16:01:52,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-01-06 16:01:52,070 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 65 [2021-01-06 16:01:52,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:01:52,071 INFO L225 Difference]: With dead ends: 75 [2021-01-06 16:01:52,071 INFO L226 Difference]: Without dead ends: 68 [2021-01-06 16:01:52,072 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2021-01-06 16:01:52,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-01-06 16:01:52,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2021-01-06 16:01:52,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2021-01-06 16:01:52,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2021-01-06 16:01:52,075 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 65 [2021-01-06 16:01:52,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:01:52,075 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2021-01-06 16:01:52,075 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2021-01-06 16:01:52,075 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2021-01-06 16:01:52,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-01-06 16:01:52,076 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:52,076 INFO L422 BasicCegarLoop]: trace histogram [58, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:52,290 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:01:52,291 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:52,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:52,291 INFO L82 PathProgramCache]: Analyzing trace with hash -236256114, now seen corresponding path program 57 times [2021-01-06 16:01:52,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:52,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027673796] [2021-01-06 16:01:52,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:52,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:54,577 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:54,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027673796] [2021-01-06 16:01:54,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385478018] [2021-01-06 16:01:54,578 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 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 16:01:54,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2021-01-06 16:01:54,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:01:54,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 60 conjunts are in the unsatisfiable core [2021-01-06 16:01:54,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:01:54,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:54,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:01:54,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 62 [2021-01-06 16:01:54,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646260525] [2021-01-06 16:01:54,836 INFO L461 AbstractCegarLoop]: Interpolant automaton has 62 states [2021-01-06 16:01:54,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:01:54,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-01-06 16:01:54,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2021-01-06 16:01:54,837 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand 62 states. [2021-01-06 16:01:54,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:01:54,936 INFO L93 Difference]: Finished difference Result 76 states and 78 transitions. [2021-01-06 16:01:54,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-01-06 16:01:54,936 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 66 [2021-01-06 16:01:54,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:01:54,937 INFO L225 Difference]: With dead ends: 76 [2021-01-06 16:01:54,937 INFO L226 Difference]: Without dead ends: 69 [2021-01-06 16:01:54,938 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 66 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 16:01:54,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-01-06 16:01:54,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-01-06 16:01:54,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2021-01-06 16:01:54,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2021-01-06 16:01:54,942 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 66 [2021-01-06 16:01:54,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:01:54,942 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2021-01-06 16:01:54,942 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2021-01-06 16:01:54,942 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2021-01-06 16:01:54,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-01-06 16:01:54,943 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:54,943 INFO L422 BasicCegarLoop]: trace histogram [59, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:55,156 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-01-06 16:01:55,157 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:55,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:55,158 INFO L82 PathProgramCache]: Analyzing trace with hash -1108052626, now seen corresponding path program 58 times [2021-01-06 16:01:55,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:55,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18145070] [2021-01-06 16:01:55,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:55,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:57,380 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:57,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18145070] [2021-01-06 16:01:57,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807198738] [2021-01-06 16:01:57,381 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 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 16:01:57,497 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:01:57,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:01:57,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 61 conjunts are in the unsatisfiable core [2021-01-06 16:01:57,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:01:57,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:57,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:01:57,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 63 [2021-01-06 16:01:57,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834451343] [2021-01-06 16:01:57,600 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2021-01-06 16:01:57,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:01:57,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-01-06 16:01:57,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2021-01-06 16:01:57,602 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 63 states. [2021-01-06 16:01:57,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:01:57,698 INFO L93 Difference]: Finished difference Result 77 states and 79 transitions. [2021-01-06 16:01:57,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-01-06 16:01:57,699 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 67 [2021-01-06 16:01:57,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:01:57,699 INFO L225 Difference]: With dead ends: 77 [2021-01-06 16:01:57,700 INFO L226 Difference]: Without dead ends: 70 [2021-01-06 16:01:57,700 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2021-01-06 16:01:57,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-01-06 16:01:57,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2021-01-06 16:01:57,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2021-01-06 16:01:57,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2021-01-06 16:01:57,703 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 67 [2021-01-06 16:01:57,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:01:57,703 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2021-01-06 16:01:57,703 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2021-01-06 16:01:57,704 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2021-01-06 16:01:57,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-01-06 16:01:57,704 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:57,704 INFO L422 BasicCegarLoop]: trace histogram [60, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:57,906 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:01:57,906 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:57,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:57,907 INFO L82 PathProgramCache]: Analyzing trace with hash 1931026574, now seen corresponding path program 59 times [2021-01-06 16:01:57,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:57,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216267313] [2021-01-06 16:01:57,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:57,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:00,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:00,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216267313] [2021-01-06 16:02:00,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803723298] [2021-01-06 16:02:00,437 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 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 16:02:00,585 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2021-01-06 16:02:00,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:02:00,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 62 conjunts are in the unsatisfiable core [2021-01-06 16:02:00,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:02:00,692 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:00,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:02:00,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 64 [2021-01-06 16:02:00,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654743581] [2021-01-06 16:02:00,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 64 states [2021-01-06 16:02:00,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:02:00,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-01-06 16:02:00,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2021-01-06 16:02:00,695 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand 64 states. [2021-01-06 16:02:00,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:02:00,823 INFO L93 Difference]: Finished difference Result 78 states and 80 transitions. [2021-01-06 16:02:00,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-01-06 16:02:00,823 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 68 [2021-01-06 16:02:00,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:02:00,824 INFO L225 Difference]: With dead ends: 78 [2021-01-06 16:02:00,824 INFO L226 Difference]: Without dead ends: 71 [2021-01-06 16:02:00,824 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2021-01-06 16:02:00,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-01-06 16:02:00,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2021-01-06 16:02:00,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2021-01-06 16:02:00,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2021-01-06 16:02:00,826 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 68 [2021-01-06 16:02:00,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:02:00,827 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2021-01-06 16:02:00,827 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2021-01-06 16:02:00,827 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2021-01-06 16:02:00,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-01-06 16:02:00,827 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:02:00,828 INFO L422 BasicCegarLoop]: trace histogram [61, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:02:01,038 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-01-06 16:02:01,039 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:02:01,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:02:01,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1653201262, now seen corresponding path program 60 times [2021-01-06 16:02:01,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:02:01,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787482235] [2021-01-06 16:02:01,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:02:01,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:03,542 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:03,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787482235] [2021-01-06 16:02:03,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204266940] [2021-01-06 16:02:03,543 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 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 16:02:03,693 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 32 check-sat command(s) [2021-01-06 16:02:03,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:02:03,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 63 conjunts are in the unsatisfiable core [2021-01-06 16:02:03,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:02:03,806 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:03,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:02:03,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 65 [2021-01-06 16:02:03,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122982898] [2021-01-06 16:02:03,807 INFO L461 AbstractCegarLoop]: Interpolant automaton has 65 states [2021-01-06 16:02:03,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:02:03,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-01-06 16:02:03,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2021-01-06 16:02:03,808 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 65 states. [2021-01-06 16:02:03,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:02:03,931 INFO L93 Difference]: Finished difference Result 79 states and 81 transitions. [2021-01-06 16:02:03,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-01-06 16:02:03,932 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 69 [2021-01-06 16:02:03,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:02:03,933 INFO L225 Difference]: With dead ends: 79 [2021-01-06 16:02:03,933 INFO L226 Difference]: Without dead ends: 72 [2021-01-06 16:02:03,933 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 69 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 16:02:03,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-01-06 16:02:03,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2021-01-06 16:02:03,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2021-01-06 16:02:03,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2021-01-06 16:02:03,936 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 69 [2021-01-06 16:02:03,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:02:03,937 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2021-01-06 16:02:03,937 INFO L482 AbstractCegarLoop]: Interpolant automaton has 65 states. [2021-01-06 16:02:03,937 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2021-01-06 16:02:03,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-01-06 16:02:03,937 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:02:03,937 INFO L422 BasicCegarLoop]: trace histogram [62, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:02:04,151 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:02:04,151 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:02:04,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:02:04,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1630551182, now seen corresponding path program 61 times [2021-01-06 16:02:04,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:02:04,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657004321] [2021-01-06 16:02:04,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:02:04,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:06,762 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:06,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657004321] [2021-01-06 16:02:06,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009669042] [2021-01-06 16:02:06,763 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 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 16:02:06,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:06,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 64 conjunts are in the unsatisfiable core [2021-01-06 16:02:06,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:02:06,988 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:06,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:02:06,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 66 [2021-01-06 16:02:06,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726302503] [2021-01-06 16:02:06,989 INFO L461 AbstractCegarLoop]: Interpolant automaton has 66 states [2021-01-06 16:02:06,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:02:06,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-01-06 16:02:06,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2021-01-06 16:02:06,990 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 66 states. [2021-01-06 16:02:07,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:02:07,091 INFO L93 Difference]: Finished difference Result 80 states and 82 transitions. [2021-01-06 16:02:07,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-01-06 16:02:07,092 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 70 [2021-01-06 16:02:07,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:02:07,093 INFO L225 Difference]: With dead ends: 80 [2021-01-06 16:02:07,093 INFO L226 Difference]: Without dead ends: 73 [2021-01-06 16:02:07,094 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 70 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 16:02:07,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-01-06 16:02:07,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-01-06 16:02:07,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2021-01-06 16:02:07,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2021-01-06 16:02:07,097 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 70 [2021-01-06 16:02:07,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:02:07,097 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2021-01-06 16:02:07,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2021-01-06 16:02:07,098 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2021-01-06 16:02:07,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-01-06 16:02:07,098 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:02:07,098 INFO L422 BasicCegarLoop]: trace histogram [63, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:02:07,307 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-01-06 16:02:07,308 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:02:07,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:02:07,308 INFO L82 PathProgramCache]: Analyzing trace with hash 928398702, now seen corresponding path program 62 times [2021-01-06 16:02:07,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:02:07,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732342081] [2021-01-06 16:02:07,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:02:07,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:09,796 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:09,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732342081] [2021-01-06 16:02:09,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930542209] [2021-01-06 16:02:09,796 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 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 16:02:09,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:02:09,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:02:09,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 65 conjunts are in the unsatisfiable core [2021-01-06 16:02:09,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:02:10,033 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:10,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:02:10,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 67 [2021-01-06 16:02:10,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25651126] [2021-01-06 16:02:10,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 67 states [2021-01-06 16:02:10,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:02:10,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-01-06 16:02:10,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2021-01-06 16:02:10,035 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 67 states. [2021-01-06 16:02:10,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:02:10,164 INFO L93 Difference]: Finished difference Result 81 states and 83 transitions. [2021-01-06 16:02:10,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-01-06 16:02:10,169 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 71 [2021-01-06 16:02:10,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:02:10,170 INFO L225 Difference]: With dead ends: 81 [2021-01-06 16:02:10,170 INFO L226 Difference]: Without dead ends: 74 [2021-01-06 16:02:10,171 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2021-01-06 16:02:10,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-01-06 16:02:10,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-01-06 16:02:10,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2021-01-06 16:02:10,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2021-01-06 16:02:10,174 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 71 [2021-01-06 16:02:10,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:02:10,175 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2021-01-06 16:02:10,175 INFO L482 AbstractCegarLoop]: Interpolant automaton has 67 states. [2021-01-06 16:02:10,175 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2021-01-06 16:02:10,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-01-06 16:02:10,175 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:02:10,175 INFO L422 BasicCegarLoop]: trace histogram [64, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:02:10,389 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:02:10,389 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:02:10,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:02:10,390 INFO L82 PathProgramCache]: Analyzing trace with hash 636508302, now seen corresponding path program 63 times [2021-01-06 16:02:10,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:02:10,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732359456] [2021-01-06 16:02:10,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:02:10,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:13,172 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:13,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732359456] [2021-01-06 16:02:13,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533855813] [2021-01-06 16:02:13,173 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 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 16:02:13,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2021-01-06 16:02:13,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:02:13,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 66 conjunts are in the unsatisfiable core [2021-01-06 16:02:13,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:02:13,439 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:13,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:02:13,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 68 [2021-01-06 16:02:13,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357063404] [2021-01-06 16:02:13,440 INFO L461 AbstractCegarLoop]: Interpolant automaton has 68 states [2021-01-06 16:02:13,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:02:13,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-01-06 16:02:13,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2021-01-06 16:02:13,441 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand 68 states. [2021-01-06 16:02:13,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:02:13,584 INFO L93 Difference]: Finished difference Result 82 states and 84 transitions. [2021-01-06 16:02:13,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-01-06 16:02:13,584 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 72 [2021-01-06 16:02:13,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:02:13,585 INFO L225 Difference]: With dead ends: 82 [2021-01-06 16:02:13,585 INFO L226 Difference]: Without dead ends: 75 [2021-01-06 16:02:13,586 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2021-01-06 16:02:13,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-01-06 16:02:13,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-01-06 16:02:13,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2021-01-06 16:02:13,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2021-01-06 16:02:13,589 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 72 [2021-01-06 16:02:13,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:02:13,589 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2021-01-06 16:02:13,589 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2021-01-06 16:02:13,589 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2021-01-06 16:02:13,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-01-06 16:02:13,590 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:02:13,590 INFO L422 BasicCegarLoop]: trace histogram [65, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:02:13,799 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-01-06 16:02:13,800 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:02:13,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:02:13,800 INFO L82 PathProgramCache]: Analyzing trace with hash 177840494, now seen corresponding path program 64 times [2021-01-06 16:02:13,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:02:13,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487415660] [2021-01-06 16:02:13,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:02:13,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:16,695 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:16,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487415660] [2021-01-06 16:02:16,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729202491] [2021-01-06 16:02:16,698 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 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 16:02:16,822 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:02:16,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:02:16,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 67 conjunts are in the unsatisfiable core [2021-01-06 16:02:16,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:02:16,956 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:16,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:02:16,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 69 [2021-01-06 16:02:16,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248836097] [2021-01-06 16:02:16,957 INFO L461 AbstractCegarLoop]: Interpolant automaton has 69 states [2021-01-06 16:02:16,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:02:16,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-01-06 16:02:16,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2021-01-06 16:02:16,959 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 69 states. [2021-01-06 16:02:17,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:02:17,090 INFO L93 Difference]: Finished difference Result 83 states and 85 transitions. [2021-01-06 16:02:17,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-01-06 16:02:17,091 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 73 [2021-01-06 16:02:17,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:02:17,091 INFO L225 Difference]: With dead ends: 83 [2021-01-06 16:02:17,091 INFO L226 Difference]: Without dead ends: 76 [2021-01-06 16:02:17,092 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2021-01-06 16:02:17,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-01-06 16:02:17,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2021-01-06 16:02:17,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2021-01-06 16:02:17,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2021-01-06 16:02:17,095 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 73 [2021-01-06 16:02:17,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:02:17,095 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2021-01-06 16:02:17,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has 69 states. [2021-01-06 16:02:17,095 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2021-01-06 16:02:17,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-01-06 16:02:17,096 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:02:17,096 INFO L422 BasicCegarLoop]: trace histogram [66, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:02:17,310 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-01-06 16:02:17,311 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:02:17,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:02:17,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1155959666, now seen corresponding path program 65 times [2021-01-06 16:02:17,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:02:17,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166542760] [2021-01-06 16:02:17,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:02:17,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:20,298 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:20,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166542760] [2021-01-06 16:02:20,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036390688] [2021-01-06 16:02:20,298 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 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 16:02:20,445 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2021-01-06 16:02:20,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:02:20,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 68 conjunts are in the unsatisfiable core [2021-01-06 16:02:20,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:02:20,561 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:20,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:02:20,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 70 [2021-01-06 16:02:20,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721675525] [2021-01-06 16:02:20,562 INFO L461 AbstractCegarLoop]: Interpolant automaton has 70 states [2021-01-06 16:02:20,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:02:20,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-01-06 16:02:20,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2021-01-06 16:02:20,563 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand 70 states. [2021-01-06 16:02:20,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:02:20,711 INFO L93 Difference]: Finished difference Result 84 states and 86 transitions. [2021-01-06 16:02:20,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-01-06 16:02:20,712 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 74 [2021-01-06 16:02:20,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:02:20,713 INFO L225 Difference]: With dead ends: 84 [2021-01-06 16:02:20,713 INFO L226 Difference]: Without dead ends: 77 [2021-01-06 16:02:20,714 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2021-01-06 16:02:20,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-01-06 16:02:20,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2021-01-06 16:02:20,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2021-01-06 16:02:20,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2021-01-06 16:02:20,716 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 74 [2021-01-06 16:02:20,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:02:20,716 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2021-01-06 16:02:20,716 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2021-01-06 16:02:20,716 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2021-01-06 16:02:20,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-01-06 16:02:20,717 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:02:20,717 INFO L422 BasicCegarLoop]: trace histogram [67, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:02:20,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-01-06 16:02:20,918 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:02:20,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:02:20,918 INFO L82 PathProgramCache]: Analyzing trace with hash 445908334, now seen corresponding path program 66 times [2021-01-06 16:02:20,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:02:20,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142888533] [2021-01-06 16:02:20,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:02:20,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:23,981 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:23,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142888533] [2021-01-06 16:02:23,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598558395] [2021-01-06 16:02:23,981 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 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 16:02:24,142 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 35 check-sat command(s) [2021-01-06 16:02:24,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:02:24,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 69 conjunts are in the unsatisfiable core [2021-01-06 16:02:24,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:02:24,274 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:24,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:02:24,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 71 [2021-01-06 16:02:24,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350260558] [2021-01-06 16:02:24,275 INFO L461 AbstractCegarLoop]: Interpolant automaton has 71 states [2021-01-06 16:02:24,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:02:24,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-01-06 16:02:24,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2021-01-06 16:02:24,277 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand 71 states. [2021-01-06 16:02:24,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:02:24,450 INFO L93 Difference]: Finished difference Result 85 states and 87 transitions. [2021-01-06 16:02:24,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-01-06 16:02:24,450 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 75 [2021-01-06 16:02:24,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:02:24,451 INFO L225 Difference]: With dead ends: 85 [2021-01-06 16:02:24,451 INFO L226 Difference]: Without dead ends: 78 [2021-01-06 16:02:24,452 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2021-01-06 16:02:24,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-01-06 16:02:24,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-01-06 16:02:24,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2021-01-06 16:02:24,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2021-01-06 16:02:24,455 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 75 [2021-01-06 16:02:24,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:02:24,455 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2021-01-06 16:02:24,455 INFO L482 AbstractCegarLoop]: Interpolant automaton has 71 states. [2021-01-06 16:02:24,455 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2021-01-06 16:02:24,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-01-06 16:02:24,456 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:02:24,457 INFO L422 BasicCegarLoop]: trace histogram [68, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:02:24,670 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:02:24,671 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:02:24,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:02:24,671 INFO L82 PathProgramCache]: Analyzing trace with hash -1435791218, now seen corresponding path program 67 times [2021-01-06 16:02:24,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:02:24,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349594050] [2021-01-06 16:02:24,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:02:24,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:27,783 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:27,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349594050] [2021-01-06 16:02:27,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330240288] [2021-01-06 16:02:27,783 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 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 16:02:27,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:27,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 526 conjuncts, 70 conjunts are in the unsatisfiable core [2021-01-06 16:02:27,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:02:28,047 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:28,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:02:28,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 72 [2021-01-06 16:02:28,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965696164] [2021-01-06 16:02:28,048 INFO L461 AbstractCegarLoop]: Interpolant automaton has 72 states [2021-01-06 16:02:28,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:02:28,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-01-06 16:02:28,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2021-01-06 16:02:28,050 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 72 states. [2021-01-06 16:02:28,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:02:28,166 INFO L93 Difference]: Finished difference Result 86 states and 88 transitions. [2021-01-06 16:02:28,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-01-06 16:02:28,167 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 76 [2021-01-06 16:02:28,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:02:28,167 INFO L225 Difference]: With dead ends: 86 [2021-01-06 16:02:28,167 INFO L226 Difference]: Without dead ends: 79 [2021-01-06 16:02:28,168 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2021-01-06 16:02:28,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-01-06 16:02:28,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2021-01-06 16:02:28,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2021-01-06 16:02:28,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2021-01-06 16:02:28,172 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 76 [2021-01-06 16:02:28,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:02:28,172 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2021-01-06 16:02:28,172 INFO L482 AbstractCegarLoop]: Interpolant automaton has 72 states. [2021-01-06 16:02:28,172 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2021-01-06 16:02:28,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-01-06 16:02:28,173 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:02:28,173 INFO L422 BasicCegarLoop]: trace histogram [69, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:02:28,389 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-01-06 16:02:28,389 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:02:28,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:02:28,390 INFO L82 PathProgramCache]: Analyzing trace with hash 361064814, now seen corresponding path program 68 times [2021-01-06 16:02:28,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:02:28,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665550910] [2021-01-06 16:02:28,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:02:28,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:31,630 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:31,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665550910] [2021-01-06 16:02:31,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376281387] [2021-01-06 16:02:31,630 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 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 16:02:31,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:02:31,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:02:31,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 71 conjunts are in the unsatisfiable core [2021-01-06 16:02:31,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:02:31,873 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:31,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:02:31,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 73 [2021-01-06 16:02:31,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025345069] [2021-01-06 16:02:31,874 INFO L461 AbstractCegarLoop]: Interpolant automaton has 73 states [2021-01-06 16:02:31,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:02:31,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-01-06 16:02:31,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2021-01-06 16:02:31,875 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand 73 states. [2021-01-06 16:02:31,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:02:31,984 INFO L93 Difference]: Finished difference Result 87 states and 89 transitions. [2021-01-06 16:02:31,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-01-06 16:02:31,985 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 77 [2021-01-06 16:02:31,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:02:31,986 INFO L225 Difference]: With dead ends: 87 [2021-01-06 16:02:31,986 INFO L226 Difference]: Without dead ends: 80 [2021-01-06 16:02:31,986 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2021-01-06 16:02:31,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-01-06 16:02:31,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-01-06 16:02:31,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2021-01-06 16:02:31,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2021-01-06 16:02:31,989 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 77 [2021-01-06 16:02:31,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:02:31,989 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2021-01-06 16:02:31,989 INFO L482 AbstractCegarLoop]: Interpolant automaton has 73 states. [2021-01-06 16:02:31,990 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2021-01-06 16:02:31,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-01-06 16:02:31,990 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:02:31,990 INFO L422 BasicCegarLoop]: trace histogram [70, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:02:32,203 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:02:32,204 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:02:32,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:02:32,204 INFO L82 PathProgramCache]: Analyzing trace with hash 229026958, now seen corresponding path program 69 times [2021-01-06 16:02:32,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:02:32,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422246704] [2021-01-06 16:02:32,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:02:32,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:35,488 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:35,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422246704] [2021-01-06 16:02:35,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001511449] [2021-01-06 16:02:35,488 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 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 16:02:35,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2021-01-06 16:02:35,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:02:35,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 540 conjuncts, 72 conjunts are in the unsatisfiable core [2021-01-06 16:02:35,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:02:35,788 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:35,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:02:35,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 74 [2021-01-06 16:02:35,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434429799] [2021-01-06 16:02:35,789 INFO L461 AbstractCegarLoop]: Interpolant automaton has 74 states [2021-01-06 16:02:35,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:02:35,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-01-06 16:02:35,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2021-01-06 16:02:35,790 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand 74 states. [2021-01-06 16:02:35,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:02:35,944 INFO L93 Difference]: Finished difference Result 88 states and 90 transitions. [2021-01-06 16:02:35,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-01-06 16:02:35,944 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 78 [2021-01-06 16:02:35,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:02:35,945 INFO L225 Difference]: With dead ends: 88 [2021-01-06 16:02:35,945 INFO L226 Difference]: Without dead ends: 81 [2021-01-06 16:02:35,945 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2021-01-06 16:02:35,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-01-06 16:02:35,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-01-06 16:02:35,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2021-01-06 16:02:35,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2021-01-06 16:02:35,948 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 78 [2021-01-06 16:02:35,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:02:35,948 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2021-01-06 16:02:35,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 74 states. [2021-01-06 16:02:35,949 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2021-01-06 16:02:35,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-01-06 16:02:35,949 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:02:35,949 INFO L422 BasicCegarLoop]: trace histogram [71, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:02:36,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2021-01-06 16:02:36,151 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:02:36,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:02:36,153 INFO L82 PathProgramCache]: Analyzing trace with hash 430820718, now seen corresponding path program 70 times [2021-01-06 16:02:36,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:02:36,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851528354] [2021-01-06 16:02:36,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:02:36,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:39,528 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:39,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851528354] [2021-01-06 16:02:39,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522242583] [2021-01-06 16:02:39,529 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 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 16:02:39,659 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:02:39,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:02:39,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 73 conjunts are in the unsatisfiable core [2021-01-06 16:02:39,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:02:39,796 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:39,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:02:39,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 75 [2021-01-06 16:02:39,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452008234] [2021-01-06 16:02:39,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 75 states [2021-01-06 16:02:39,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:02:39,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-01-06 16:02:39,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2021-01-06 16:02:39,798 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 75 states. [2021-01-06 16:02:39,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:02:39,979 INFO L93 Difference]: Finished difference Result 89 states and 91 transitions. [2021-01-06 16:02:39,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-01-06 16:02:39,979 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 79 [2021-01-06 16:02:39,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:02:39,980 INFO L225 Difference]: With dead ends: 89 [2021-01-06 16:02:39,980 INFO L226 Difference]: Without dead ends: 82 [2021-01-06 16:02:39,981 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2021-01-06 16:02:39,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-01-06 16:02:39,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2021-01-06 16:02:39,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2021-01-06 16:02:39,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2021-01-06 16:02:39,984 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 79 [2021-01-06 16:02:39,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:02:39,984 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2021-01-06 16:02:39,985 INFO L482 AbstractCegarLoop]: Interpolant automaton has 75 states. [2021-01-06 16:02:39,985 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2021-01-06 16:02:39,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-01-06 16:02:39,985 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:02:39,985 INFO L422 BasicCegarLoop]: trace histogram [72, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:02:40,200 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:02:40,201 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:02:40,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:02:40,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1903507314, now seen corresponding path program 71 times [2021-01-06 16:02:40,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:02:40,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004479993] [2021-01-06 16:02:40,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:02:40,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:43,812 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:43,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004479993] [2021-01-06 16:02:43,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888120808] [2021-01-06 16:02:43,813 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 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 16:02:43,978 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2021-01-06 16:02:43,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:02:43,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 74 conjunts are in the unsatisfiable core [2021-01-06 16:02:43,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:02:44,125 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:44,126 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:02:44,126 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 76 [2021-01-06 16:02:44,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433499508] [2021-01-06 16:02:44,126 INFO L461 AbstractCegarLoop]: Interpolant automaton has 76 states [2021-01-06 16:02:44,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:02:44,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-01-06 16:02:44,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2021-01-06 16:02:44,127 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand 76 states. [2021-01-06 16:02:44,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:02:44,308 INFO L93 Difference]: Finished difference Result 90 states and 92 transitions. [2021-01-06 16:02:44,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-01-06 16:02:44,308 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 80 [2021-01-06 16:02:44,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:02:44,309 INFO L225 Difference]: With dead ends: 90 [2021-01-06 16:02:44,309 INFO L226 Difference]: Without dead ends: 83 [2021-01-06 16:02:44,310 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2021-01-06 16:02:44,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-01-06 16:02:44,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-01-06 16:02:44,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2021-01-06 16:02:44,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2021-01-06 16:02:44,316 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 80 [2021-01-06 16:02:44,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:02:44,316 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2021-01-06 16:02:44,316 INFO L482 AbstractCegarLoop]: Interpolant automaton has 76 states. [2021-01-06 16:02:44,316 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2021-01-06 16:02:44,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-01-06 16:02:44,317 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:02:44,318 INFO L422 BasicCegarLoop]: trace histogram [73, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:02:44,531 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:02:44,532 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:02:44,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:02:44,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1253232274, now seen corresponding path program 72 times [2021-01-06 16:02:44,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:02:44,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599849400] [2021-01-06 16:02:44,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:02:44,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:48,189 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:48,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599849400] [2021-01-06 16:02:48,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084675678] [2021-01-06 16:02:48,190 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 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 16:02:48,384 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 38 check-sat command(s) [2021-01-06 16:02:48,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:02:48,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 75 conjunts are in the unsatisfiable core [2021-01-06 16:02:48,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:02:48,513 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:48,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:02:48,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 77 [2021-01-06 16:02:48,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240785269] [2021-01-06 16:02:48,514 INFO L461 AbstractCegarLoop]: Interpolant automaton has 77 states [2021-01-06 16:02:48,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:02:48,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-01-06 16:02:48,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2021-01-06 16:02:48,515 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand 77 states. [2021-01-06 16:02:48,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:02:48,688 INFO L93 Difference]: Finished difference Result 91 states and 93 transitions. [2021-01-06 16:02:48,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-01-06 16:02:48,689 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 81 [2021-01-06 16:02:48,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:02:48,690 INFO L225 Difference]: With dead ends: 91 [2021-01-06 16:02:48,690 INFO L226 Difference]: Without dead ends: 84 [2021-01-06 16:02:48,690 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2021-01-06 16:02:48,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-01-06 16:02:48,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-01-06 16:02:48,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2021-01-06 16:02:48,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2021-01-06 16:02:48,693 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 81 [2021-01-06 16:02:48,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:02:48,693 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2021-01-06 16:02:48,693 INFO L482 AbstractCegarLoop]: Interpolant automaton has 77 states. [2021-01-06 16:02:48,694 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2021-01-06 16:02:48,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-01-06 16:02:48,694 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:02:48,694 INFO L422 BasicCegarLoop]: trace histogram [74, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:02:48,908 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:02:48,909 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:02:48,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:02:48,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1725424782, now seen corresponding path program 73 times [2021-01-06 16:02:48,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:02:48,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777924726] [2021-01-06 16:02:48,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:02:48,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:52,680 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:52,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777924726] [2021-01-06 16:02:52,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112146827] [2021-01-06 16:02:52,680 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 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 16:02:52,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:52,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 76 conjunts are in the unsatisfiable core [2021-01-06 16:02:52,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:02:52,959 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:52,960 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:02:52,960 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 78 [2021-01-06 16:02:52,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578912568] [2021-01-06 16:02:52,961 INFO L461 AbstractCegarLoop]: Interpolant automaton has 78 states [2021-01-06 16:02:52,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:02:52,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-01-06 16:02:52,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2021-01-06 16:02:52,962 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand 78 states. [2021-01-06 16:02:53,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:02:53,152 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2021-01-06 16:02:53,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-01-06 16:02:53,152 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 82 [2021-01-06 16:02:53,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:02:53,153 INFO L225 Difference]: With dead ends: 92 [2021-01-06 16:02:53,153 INFO L226 Difference]: Without dead ends: 85 [2021-01-06 16:02:53,153 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2021-01-06 16:02:53,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-01-06 16:02:53,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2021-01-06 16:02:53,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2021-01-06 16:02:53,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2021-01-06 16:02:53,156 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 82 [2021-01-06 16:02:53,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:02:53,156 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2021-01-06 16:02:53,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has 78 states. [2021-01-06 16:02:53,156 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2021-01-06 16:02:53,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-01-06 16:02:53,157 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:02:53,157 INFO L422 BasicCegarLoop]: trace histogram [75, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:02:53,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-01-06 16:02:53,363 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:02:53,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:02:53,363 INFO L82 PathProgramCache]: Analyzing trace with hash -425486994, now seen corresponding path program 74 times [2021-01-06 16:02:53,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:02:53,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670478454] [2021-01-06 16:02:53,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:02:53,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:57,199 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:57,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670478454] [2021-01-06 16:02:57,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247634267] [2021-01-06 16:02:57,199 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 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 16:02:57,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:02:57,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:02:57,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 575 conjuncts, 77 conjunts are in the unsatisfiable core [2021-01-06 16:02:57,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:02:57,476 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:57,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:02:57,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 79 [2021-01-06 16:02:57,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602460387] [2021-01-06 16:02:57,477 INFO L461 AbstractCegarLoop]: Interpolant automaton has 79 states [2021-01-06 16:02:57,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:02:57,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-01-06 16:02:57,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2021-01-06 16:02:57,479 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand 79 states. [2021-01-06 16:02:57,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:02:57,651 INFO L93 Difference]: Finished difference Result 93 states and 95 transitions. [2021-01-06 16:02:57,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-01-06 16:02:57,652 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 83 [2021-01-06 16:02:57,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:02:57,652 INFO L225 Difference]: With dead ends: 93 [2021-01-06 16:02:57,652 INFO L226 Difference]: Without dead ends: 86 [2021-01-06 16:02:57,653 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2021-01-06 16:02:57,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-01-06 16:02:57,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2021-01-06 16:02:57,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2021-01-06 16:02:57,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 87 transitions. [2021-01-06 16:02:57,657 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 87 transitions. Word has length 83 [2021-01-06 16:02:57,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:02:57,658 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 87 transitions. [2021-01-06 16:02:57,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has 79 states. [2021-01-06 16:02:57,658 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 87 transitions. [2021-01-06 16:02:57,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-01-06 16:02:57,658 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:02:57,658 INFO L422 BasicCegarLoop]: trace histogram [76, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:02:57,872 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:02:57,873 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:02:57,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:02:57,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1615724686, now seen corresponding path program 75 times [2021-01-06 16:02:57,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:02:57,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371068182] [2021-01-06 16:02:57,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:02:57,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:03:01,869 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:03:01,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371068182] [2021-01-06 16:03:01,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292508936] [2021-01-06 16:03:01,869 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 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 16:03:02,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2021-01-06 16:03:02,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:03:02,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 582 conjuncts, 78 conjunts are in the unsatisfiable core [2021-01-06 16:03:02,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:03:02,180 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:03:02,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:03:02,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 80 [2021-01-06 16:03:02,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083690826] [2021-01-06 16:03:02,181 INFO L461 AbstractCegarLoop]: Interpolant automaton has 80 states [2021-01-06 16:03:02,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:03:02,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-01-06 16:03:02,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2021-01-06 16:03:02,182 INFO L87 Difference]: Start difference. First operand 86 states and 87 transitions. Second operand 80 states. [2021-01-06 16:03:02,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:03:02,329 INFO L93 Difference]: Finished difference Result 94 states and 96 transitions. [2021-01-06 16:03:02,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-01-06 16:03:02,330 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 84 [2021-01-06 16:03:02,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:03:02,330 INFO L225 Difference]: With dead ends: 94 [2021-01-06 16:03:02,331 INFO L226 Difference]: Without dead ends: 87 [2021-01-06 16:03:02,331 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2021-01-06 16:03:02,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-01-06 16:03:02,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2021-01-06 16:03:02,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2021-01-06 16:03:02,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2021-01-06 16:03:02,337 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 84 [2021-01-06 16:03:02,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:03:02,338 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2021-01-06 16:03:02,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has 80 states. [2021-01-06 16:03:02,338 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2021-01-06 16:03:02,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-01-06 16:03:02,338 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:03:02,338 INFO L422 BasicCegarLoop]: trace histogram [77, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:03:02,553 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:03:02,553 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:03:02,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:03:02,554 INFO L82 PathProgramCache]: Analyzing trace with hash 468777326, now seen corresponding path program 76 times [2021-01-06 16:03:02,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:03:02,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733031931] [2021-01-06 16:03:02,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:03:02,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:03:06,663 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:03:06,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733031931] [2021-01-06 16:03:06,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193997869] [2021-01-06 16:03:06,663 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 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 16:03:06,800 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:03:06,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:03:06,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 589 conjuncts, 79 conjunts are in the unsatisfiable core [2021-01-06 16:03:06,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:03:06,935 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:03:06,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:03:06,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 81 [2021-01-06 16:03:06,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236463801] [2021-01-06 16:03:06,936 INFO L461 AbstractCegarLoop]: Interpolant automaton has 81 states [2021-01-06 16:03:06,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:03:06,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-01-06 16:03:06,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2021-01-06 16:03:06,937 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 81 states. [2021-01-06 16:03:07,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:03:07,102 INFO L93 Difference]: Finished difference Result 95 states and 97 transitions. [2021-01-06 16:03:07,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-01-06 16:03:07,103 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 85 [2021-01-06 16:03:07,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:03:07,104 INFO L225 Difference]: With dead ends: 95 [2021-01-06 16:03:07,104 INFO L226 Difference]: Without dead ends: 88 [2021-01-06 16:03:07,105 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2021-01-06 16:03:07,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-01-06 16:03:07,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2021-01-06 16:03:07,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2021-01-06 16:03:07,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2021-01-06 16:03:07,109 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 85 [2021-01-06 16:03:07,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:03:07,109 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2021-01-06 16:03:07,109 INFO L482 AbstractCegarLoop]: Interpolant automaton has 81 states. [2021-01-06 16:03:07,109 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2021-01-06 16:03:07,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-01-06 16:03:07,110 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:03:07,110 INFO L422 BasicCegarLoop]: trace histogram [78, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:03:07,324 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-01-06 16:03:07,325 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:03:07,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:03:07,325 INFO L82 PathProgramCache]: Analyzing trace with hash -726852466, now seen corresponding path program 77 times [2021-01-06 16:03:07,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:03:07,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862873807] [2021-01-06 16:03:07,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:03:07,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:03:11,604 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:03:11,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862873807] [2021-01-06 16:03:11,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95154246] [2021-01-06 16:03:11,604 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 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 16:03:11,774 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2021-01-06 16:03:11,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:03:11,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 596 conjuncts, 80 conjunts are in the unsatisfiable core [2021-01-06 16:03:11,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:03:11,925 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:03:11,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:03:11,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 82 [2021-01-06 16:03:11,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693389116] [2021-01-06 16:03:11,926 INFO L461 AbstractCegarLoop]: Interpolant automaton has 82 states [2021-01-06 16:03:11,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:03:11,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-01-06 16:03:11,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2021-01-06 16:03:11,928 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand 82 states. [2021-01-06 16:03:12,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:03:12,148 INFO L93 Difference]: Finished difference Result 96 states and 98 transitions. [2021-01-06 16:03:12,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-01-06 16:03:12,149 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 86 [2021-01-06 16:03:12,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:03:12,150 INFO L225 Difference]: With dead ends: 96 [2021-01-06 16:03:12,150 INFO L226 Difference]: Without dead ends: 89 [2021-01-06 16:03:12,152 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2021-01-06 16:03:12,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-01-06 16:03:12,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-01-06 16:03:12,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2021-01-06 16:03:12,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2021-01-06 16:03:12,156 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 86 [2021-01-06 16:03:12,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:03:12,156 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2021-01-06 16:03:12,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has 82 states. [2021-01-06 16:03:12,156 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2021-01-06 16:03:12,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-01-06 16:03:12,157 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:03:12,157 INFO L422 BasicCegarLoop]: trace histogram [79, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:03:12,368 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-01-06 16:03:12,369 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:03:12,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:03:12,369 INFO L82 PathProgramCache]: Analyzing trace with hash 863329646, now seen corresponding path program 78 times [2021-01-06 16:03:12,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:03:12,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134821930] [2021-01-06 16:03:12,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:03:12,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:03:16,719 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:03:16,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134821930] [2021-01-06 16:03:16,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775295920] [2021-01-06 16:03:16,720 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 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 16:03:16,914 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 41 check-sat command(s) [2021-01-06 16:03:16,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:03:16,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 603 conjuncts, 81 conjunts are in the unsatisfiable core [2021-01-06 16:03:16,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:03:17,052 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:03:17,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:03:17,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 83 [2021-01-06 16:03:17,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029287251] [2021-01-06 16:03:17,054 INFO L461 AbstractCegarLoop]: Interpolant automaton has 83 states [2021-01-06 16:03:17,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:03:17,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-01-06 16:03:17,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2021-01-06 16:03:17,055 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand 83 states. [2021-01-06 16:03:17,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:03:17,231 INFO L93 Difference]: Finished difference Result 97 states and 99 transitions. [2021-01-06 16:03:17,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-01-06 16:03:17,232 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 87 [2021-01-06 16:03:17,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:03:17,233 INFO L225 Difference]: With dead ends: 97 [2021-01-06 16:03:17,233 INFO L226 Difference]: Without dead ends: 90 [2021-01-06 16:03:17,234 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2021-01-06 16:03:17,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-01-06 16:03:17,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2021-01-06 16:03:17,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2021-01-06 16:03:17,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2021-01-06 16:03:17,238 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 87 [2021-01-06 16:03:17,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:03:17,238 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2021-01-06 16:03:17,239 INFO L482 AbstractCegarLoop]: Interpolant automaton has 83 states. [2021-01-06 16:03:17,239 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2021-01-06 16:03:17,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-01-06 16:03:17,239 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:03:17,239 INFO L422 BasicCegarLoop]: trace histogram [80, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:03:17,453 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:03:17,453 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:03:17,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:03:17,454 INFO L82 PathProgramCache]: Analyzing trace with hash -1380632434, now seen corresponding path program 79 times [2021-01-06 16:03:17,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:03:17,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867236263] [2021-01-06 16:03:17,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:03:17,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:03:21,948 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:03:21,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867236263] [2021-01-06 16:03:21,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202378575] [2021-01-06 16:03:21,949 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:03:22,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:03:22,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 610 conjuncts, 82 conjunts are in the unsatisfiable core [2021-01-06 16:03:22,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:03:22,241 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:03:22,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:03:22,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 84 [2021-01-06 16:03:22,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843670226] [2021-01-06 16:03:22,242 INFO L461 AbstractCegarLoop]: Interpolant automaton has 84 states [2021-01-06 16:03:22,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:03:22,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-01-06 16:03:22,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2021-01-06 16:03:22,243 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand 84 states. [2021-01-06 16:03:22,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:03:22,440 INFO L93 Difference]: Finished difference Result 98 states and 100 transitions. [2021-01-06 16:03:22,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-01-06 16:03:22,441 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 88 [2021-01-06 16:03:22,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:03:22,441 INFO L225 Difference]: With dead ends: 98 [2021-01-06 16:03:22,442 INFO L226 Difference]: Without dead ends: 91 [2021-01-06 16:03:22,442 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2021-01-06 16:03:22,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-01-06 16:03:22,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2021-01-06 16:03:22,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2021-01-06 16:03:22,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2021-01-06 16:03:22,446 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 88 [2021-01-06 16:03:22,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:03:22,447 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2021-01-06 16:03:22,447 INFO L482 AbstractCegarLoop]: Interpolant automaton has 84 states. [2021-01-06 16:03:22,447 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2021-01-06 16:03:22,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-01-06 16:03:22,447 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:03:22,448 INFO L422 BasicCegarLoop]: trace histogram [81, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:03:22,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:03:22,660 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:03:22,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:03:22,661 INFO L82 PathProgramCache]: Analyzing trace with hash 2070987118, now seen corresponding path program 80 times [2021-01-06 16:03:22,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:03:22,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476290519] [2021-01-06 16:03:22,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:03:22,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:03:27,283 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:03:27,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476290519] [2021-01-06 16:03:27,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149634494] [2021-01-06 16:03:27,284 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:03:27,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:03:27,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:03:27,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 617 conjuncts, 83 conjunts are in the unsatisfiable core [2021-01-06 16:03:27,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:03:27,578 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:03:27,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:03:27,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 85 [2021-01-06 16:03:27,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714682641] [2021-01-06 16:03:27,579 INFO L461 AbstractCegarLoop]: Interpolant automaton has 85 states [2021-01-06 16:03:27,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:03:27,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-01-06 16:03:27,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2021-01-06 16:03:27,580 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand 85 states. [2021-01-06 16:03:27,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:03:27,724 INFO L93 Difference]: Finished difference Result 99 states and 101 transitions. [2021-01-06 16:03:27,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-01-06 16:03:27,725 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 89 [2021-01-06 16:03:27,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:03:27,727 INFO L225 Difference]: With dead ends: 99 [2021-01-06 16:03:27,727 INFO L226 Difference]: Without dead ends: 92 [2021-01-06 16:03:27,727 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2021-01-06 16:03:27,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-01-06 16:03:27,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2021-01-06 16:03:27,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2021-01-06 16:03:27,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 93 transitions. [2021-01-06 16:03:27,730 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 93 transitions. Word has length 89 [2021-01-06 16:03:27,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:03:27,730 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 93 transitions. [2021-01-06 16:03:27,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 85 states. [2021-01-06 16:03:27,730 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 93 transitions. [2021-01-06 16:03:27,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-01-06 16:03:27,731 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:03:27,731 INFO L422 BasicCegarLoop]: trace histogram [82, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:03:27,946 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:03:27,947 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:03:27,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:03:27,948 INFO L82 PathProgramCache]: Analyzing trace with hash 1697010830, now seen corresponding path program 81 times [2021-01-06 16:03:27,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:03:27,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182763278] [2021-01-06 16:03:27,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:03:27,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:03:32,675 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:03:32,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182763278] [2021-01-06 16:03:32,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391038349] [2021-01-06 16:03:32,676 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:03:32,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2021-01-06 16:03:32,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:03:32,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 624 conjuncts, 84 conjunts are in the unsatisfiable core [2021-01-06 16:03:32,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:03:33,008 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:03:33,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:03:33,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 86 [2021-01-06 16:03:33,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421241423] [2021-01-06 16:03:33,009 INFO L461 AbstractCegarLoop]: Interpolant automaton has 86 states [2021-01-06 16:03:33,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:03:33,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-01-06 16:03:33,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2021-01-06 16:03:33,010 INFO L87 Difference]: Start difference. First operand 92 states and 93 transitions. Second operand 86 states. [2021-01-06 16:03:33,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:03:33,219 INFO L93 Difference]: Finished difference Result 100 states and 102 transitions. [2021-01-06 16:03:33,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-01-06 16:03:33,220 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 90 [2021-01-06 16:03:33,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:03:33,221 INFO L225 Difference]: With dead ends: 100 [2021-01-06 16:03:33,221 INFO L226 Difference]: Without dead ends: 93 [2021-01-06 16:03:33,221 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2021-01-06 16:03:33,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-01-06 16:03:33,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2021-01-06 16:03:33,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2021-01-06 16:03:33,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2021-01-06 16:03:33,224 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 90 [2021-01-06 16:03:33,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:03:33,224 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2021-01-06 16:03:33,225 INFO L482 AbstractCegarLoop]: Interpolant automaton has 86 states. [2021-01-06 16:03:33,225 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2021-01-06 16:03:33,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-01-06 16:03:33,225 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:03:33,225 INFO L422 BasicCegarLoop]: trace histogram [83, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:03:33,440 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:03:33,440 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:03:33,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:03:33,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1306319506, now seen corresponding path program 82 times [2021-01-06 16:03:33,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:03:33,442 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829230204] [2021-01-06 16:03:33,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:03:33,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:03:38,264 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:03:38,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829230204] [2021-01-06 16:03:38,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780072891] [2021-01-06 16:03:38,265 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:03:38,424 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:03:38,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:03:38,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 631 conjuncts, 85 conjunts are in the unsatisfiable core [2021-01-06 16:03:38,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:03:38,574 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:03:38,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:03:38,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 87 [2021-01-06 16:03:38,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133898573] [2021-01-06 16:03:38,575 INFO L461 AbstractCegarLoop]: Interpolant automaton has 87 states [2021-01-06 16:03:38,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:03:38,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-01-06 16:03:38,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2021-01-06 16:03:38,576 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand 87 states. [2021-01-06 16:03:38,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:03:38,731 INFO L93 Difference]: Finished difference Result 101 states and 103 transitions. [2021-01-06 16:03:38,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-01-06 16:03:38,732 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 91 [2021-01-06 16:03:38,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:03:38,732 INFO L225 Difference]: With dead ends: 101 [2021-01-06 16:03:38,733 INFO L226 Difference]: Without dead ends: 94 [2021-01-06 16:03:38,733 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2021-01-06 16:03:38,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-01-06 16:03:38,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2021-01-06 16:03:38,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2021-01-06 16:03:38,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 95 transitions. [2021-01-06 16:03:38,737 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 95 transitions. Word has length 91 [2021-01-06 16:03:38,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:03:38,737 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 95 transitions. [2021-01-06 16:03:38,737 INFO L482 AbstractCegarLoop]: Interpolant automaton has 87 states. [2021-01-06 16:03:38,737 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 95 transitions. [2021-01-06 16:03:38,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-01-06 16:03:38,738 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:03:38,738 INFO L422 BasicCegarLoop]: trace histogram [84, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:03:38,952 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:03:38,952 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:03:38,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:03:38,953 INFO L82 PathProgramCache]: Analyzing trace with hash 79720590, now seen corresponding path program 83 times [2021-01-06 16:03:38,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:03:38,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364191177] [2021-01-06 16:03:38,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:03:38,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:03:43,964 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:03:43,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364191177] [2021-01-06 16:03:43,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859554341] [2021-01-06 16:03:43,965 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:03:44,148 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2021-01-06 16:03:44,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:03:44,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 638 conjuncts, 86 conjunts are in the unsatisfiable core [2021-01-06 16:03:44,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:03:44,279 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:03:44,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:03:44,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 88 [2021-01-06 16:03:44,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664727780] [2021-01-06 16:03:44,280 INFO L461 AbstractCegarLoop]: Interpolant automaton has 88 states [2021-01-06 16:03:44,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:03:44,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2021-01-06 16:03:44,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2021-01-06 16:03:44,282 INFO L87 Difference]: Start difference. First operand 94 states and 95 transitions. Second operand 88 states. [2021-01-06 16:03:44,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:03:44,552 INFO L93 Difference]: Finished difference Result 102 states and 104 transitions. [2021-01-06 16:03:44,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-01-06 16:03:44,552 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 92 [2021-01-06 16:03:44,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:03:44,554 INFO L225 Difference]: With dead ends: 102 [2021-01-06 16:03:44,554 INFO L226 Difference]: Without dead ends: 95 [2021-01-06 16:03:44,555 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2021-01-06 16:03:44,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-01-06 16:03:44,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2021-01-06 16:03:44,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2021-01-06 16:03:44,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2021-01-06 16:03:44,559 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 92 [2021-01-06 16:03:44,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:03:44,560 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2021-01-06 16:03:44,560 INFO L482 AbstractCegarLoop]: Interpolant automaton has 88 states. [2021-01-06 16:03:44,560 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2021-01-06 16:03:44,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-01-06 16:03:44,561 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:03:44,561 INFO L422 BasicCegarLoop]: trace histogram [85, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:03:44,775 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2021-01-06 16:03:44,776 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:03:44,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:03:44,776 INFO L82 PathProgramCache]: Analyzing trace with hash 97290606, now seen corresponding path program 84 times [2021-01-06 16:03:44,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:03:44,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140573385] [2021-01-06 16:03:44,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:03:44,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:03:49,956 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:03:49,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140573385] [2021-01-06 16:03:49,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930649292] [2021-01-06 16:03:49,957 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 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:03:50,165 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 44 check-sat command(s) [2021-01-06 16:03:50,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:03:50,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 645 conjuncts, 87 conjunts are in the unsatisfiable core [2021-01-06 16:03:50,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:03:50,321 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:03:50,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:03:50,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 89 [2021-01-06 16:03:50,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761816907] [2021-01-06 16:03:50,322 INFO L461 AbstractCegarLoop]: Interpolant automaton has 89 states [2021-01-06 16:03:50,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:03:50,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2021-01-06 16:03:50,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2021-01-06 16:03:50,323 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand 89 states. [2021-01-06 16:03:50,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:03:50,554 INFO L93 Difference]: Finished difference Result 103 states and 105 transitions. [2021-01-06 16:03:50,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-01-06 16:03:50,555 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 93 [2021-01-06 16:03:50,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:03:50,556 INFO L225 Difference]: With dead ends: 103 [2021-01-06 16:03:50,556 INFO L226 Difference]: Without dead ends: 96 [2021-01-06 16:03:50,556 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2021-01-06 16:03:50,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-01-06 16:03:50,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2021-01-06 16:03:50,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2021-01-06 16:03:50,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 97 transitions. [2021-01-06 16:03:50,560 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 97 transitions. Word has length 93 [2021-01-06 16:03:50,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:03:50,560 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 97 transitions. [2021-01-06 16:03:50,560 INFO L482 AbstractCegarLoop]: Interpolant automaton has 89 states. [2021-01-06 16:03:50,560 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 97 transitions. [2021-01-06 16:03:50,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-01-06 16:03:50,561 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:03:50,561 INFO L422 BasicCegarLoop]: trace histogram [86, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:03:50,774 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:03:50,775 INFO L429 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:03:50,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:03:50,775 INFO L82 PathProgramCache]: Analyzing trace with hash 641961102, now seen corresponding path program 85 times [2021-01-06 16:03:50,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:03:50,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327783084] [2021-01-06 16:03:50,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:03:50,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:03:56,120 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:03:56,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327783084] [2021-01-06 16:03:56,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813649568] [2021-01-06 16:03:56,120 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:03:56,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:03:56,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 652 conjuncts, 88 conjunts are in the unsatisfiable core [2021-01-06 16:03:56,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:03:56,421 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:03:56,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:03:56,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 90 [2021-01-06 16:03:56,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567434021] [2021-01-06 16:03:56,422 INFO L461 AbstractCegarLoop]: Interpolant automaton has 90 states [2021-01-06 16:03:56,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:03:56,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-01-06 16:03:56,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2021-01-06 16:03:56,423 INFO L87 Difference]: Start difference. First operand 96 states and 97 transitions. Second operand 90 states. [2021-01-06 16:03:56,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:03:56,624 INFO L93 Difference]: Finished difference Result 104 states and 106 transitions. [2021-01-06 16:03:56,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-01-06 16:03:56,625 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 94 [2021-01-06 16:03:56,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:03:56,625 INFO L225 Difference]: With dead ends: 104 [2021-01-06 16:03:56,625 INFO L226 Difference]: Without dead ends: 97 [2021-01-06 16:03:56,626 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2021-01-06 16:03:56,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-01-06 16:03:56,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2021-01-06 16:03:56,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2021-01-06 16:03:56,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2021-01-06 16:03:56,629 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 94 [2021-01-06 16:03:56,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:03:56,629 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2021-01-06 16:03:56,630 INFO L482 AbstractCegarLoop]: Interpolant automaton has 90 states. [2021-01-06 16:03:56,630 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2021-01-06 16:03:56,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-01-06 16:03:56,630 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:03:56,630 INFO L422 BasicCegarLoop]: trace histogram [87, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:03:56,843 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-01-06 16:03:56,844 INFO L429 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:03:56,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:03:56,844 INFO L82 PathProgramCache]: Analyzing trace with hash 346877294, now seen corresponding path program 86 times [2021-01-06 16:03:56,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:03:56,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778195161] [2021-01-06 16:03:56,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:03:56,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:04:02,333 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:04:02,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778195161] [2021-01-06 16:04:02,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748064403] [2021-01-06 16:04:02,333 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:04:02,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:04:02,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:04:02,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 89 conjunts are in the unsatisfiable core [2021-01-06 16:04:02,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:04:02,667 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:04:02,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:04:02,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 91 [2021-01-06 16:04:02,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958978442] [2021-01-06 16:04:02,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 91 states [2021-01-06 16:04:02,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:04:02,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2021-01-06 16:04:02,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2021-01-06 16:04:02,669 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand 91 states. [2021-01-06 16:04:02,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:04:02,853 INFO L93 Difference]: Finished difference Result 105 states and 107 transitions. [2021-01-06 16:04:02,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-01-06 16:04:02,854 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 95 [2021-01-06 16:04:02,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:04:02,854 INFO L225 Difference]: With dead ends: 105 [2021-01-06 16:04:02,854 INFO L226 Difference]: Without dead ends: 98 [2021-01-06 16:04:02,855 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2021-01-06 16:04:02,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-01-06 16:04:02,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2021-01-06 16:04:02,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2021-01-06 16:04:02,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 99 transitions. [2021-01-06 16:04:02,859 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 99 transitions. Word has length 95 [2021-01-06 16:04:02,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:04:02,859 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 99 transitions. [2021-01-06 16:04:02,859 INFO L482 AbstractCegarLoop]: Interpolant automaton has 91 states. [2021-01-06 16:04:02,859 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 99 transitions. [2021-01-06 16:04:02,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-01-06 16:04:02,860 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:04:02,860 INFO L422 BasicCegarLoop]: trace histogram [88, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:04:03,070 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-01-06 16:04:03,071 INFO L429 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:04:03,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:04:03,071 INFO L82 PathProgramCache]: Analyzing trace with hash -210786162, now seen corresponding path program 87 times [2021-01-06 16:04:03,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:04:03,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285649134] [2021-01-06 16:04:03,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:04:03,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:04:08,730 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:04:08,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285649134] [2021-01-06 16:04:08,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454515802] [2021-01-06 16:04:08,731 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:04:08,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2021-01-06 16:04:08,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:04:08,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 666 conjuncts, 90 conjunts are in the unsatisfiable core [2021-01-06 16:04:08,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:04:09,089 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:04:09,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:04:09,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 92 [2021-01-06 16:04:09,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221481567] [2021-01-06 16:04:09,090 INFO L461 AbstractCegarLoop]: Interpolant automaton has 92 states [2021-01-06 16:04:09,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:04:09,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2021-01-06 16:04:09,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2021-01-06 16:04:09,091 INFO L87 Difference]: Start difference. First operand 98 states and 99 transitions. Second operand 92 states. [2021-01-06 16:04:09,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:04:09,272 INFO L93 Difference]: Finished difference Result 106 states and 108 transitions. [2021-01-06 16:04:09,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-01-06 16:04:09,273 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 96 [2021-01-06 16:04:09,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:04:09,274 INFO L225 Difference]: With dead ends: 106 [2021-01-06 16:04:09,274 INFO L226 Difference]: Without dead ends: 99 [2021-01-06 16:04:09,274 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2021-01-06 16:04:09,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-01-06 16:04:09,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2021-01-06 16:04:09,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2021-01-06 16:04:09,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2021-01-06 16:04:09,277 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 96 [2021-01-06 16:04:09,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:04:09,277 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2021-01-06 16:04:09,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 92 states. [2021-01-06 16:04:09,277 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2021-01-06 16:04:09,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-01-06 16:04:09,277 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:04:09,277 INFO L422 BasicCegarLoop]: trace histogram [89, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:04:09,478 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:04:09,478 INFO L429 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:04:09,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:04:09,479 INFO L82 PathProgramCache]: Analyzing trace with hash -318484114, now seen corresponding path program 88 times [2021-01-06 16:04:09,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:04:09,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223239774] [2021-01-06 16:04:09,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:04:09,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:04:15,294 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:04:15,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223239774] [2021-01-06 16:04:15,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826927462] [2021-01-06 16:04:15,294 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:04:15,456 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:04:15,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:04:15,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 673 conjuncts, 91 conjunts are in the unsatisfiable core [2021-01-06 16:04:15,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:04:15,608 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:04:15,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:04:15,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 93 [2021-01-06 16:04:15,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375648176] [2021-01-06 16:04:15,609 INFO L461 AbstractCegarLoop]: Interpolant automaton has 93 states [2021-01-06 16:04:15,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:04:15,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2021-01-06 16:04:15,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2021-01-06 16:04:15,610 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand 93 states. [2021-01-06 16:04:15,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:04:15,791 INFO L93 Difference]: Finished difference Result 107 states and 109 transitions. [2021-01-06 16:04:15,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-01-06 16:04:15,792 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 97 [2021-01-06 16:04:15,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:04:15,792 INFO L225 Difference]: With dead ends: 107 [2021-01-06 16:04:15,792 INFO L226 Difference]: Without dead ends: 100 [2021-01-06 16:04:15,793 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2021-01-06 16:04:15,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-01-06 16:04:15,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2021-01-06 16:04:15,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2021-01-06 16:04:15,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 101 transitions. [2021-01-06 16:04:15,795 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 101 transitions. Word has length 97 [2021-01-06 16:04:15,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:04:15,796 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 101 transitions. [2021-01-06 16:04:15,796 INFO L482 AbstractCegarLoop]: Interpolant automaton has 93 states. [2021-01-06 16:04:15,796 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 101 transitions. [2021-01-06 16:04:15,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-01-06 16:04:15,796 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:04:15,796 INFO L422 BasicCegarLoop]: trace histogram [90, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:04:15,997 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:04:15,997 INFO L429 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:04:15,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:04:15,998 INFO L82 PathProgramCache]: Analyzing trace with hash 637846670, now seen corresponding path program 89 times [2021-01-06 16:04:15,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:04:15,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032011247] [2021-01-06 16:04:15,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:04:16,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:04:21,985 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:04:21,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032011247] [2021-01-06 16:04:21,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21970336] [2021-01-06 16:04:21,986 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:04:22,180 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2021-01-06 16:04:22,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:04:22,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 680 conjuncts, 92 conjunts are in the unsatisfiable core [2021-01-06 16:04:22,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:04:22,348 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:04:22,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:04:22,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 94 [2021-01-06 16:04:22,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318200683] [2021-01-06 16:04:22,349 INFO L461 AbstractCegarLoop]: Interpolant automaton has 94 states [2021-01-06 16:04:22,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:04:22,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-01-06 16:04:22,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2021-01-06 16:04:22,351 INFO L87 Difference]: Start difference. First operand 100 states and 101 transitions. Second operand 94 states. [2021-01-06 16:04:22,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:04:22,543 INFO L93 Difference]: Finished difference Result 108 states and 110 transitions. [2021-01-06 16:04:22,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-01-06 16:04:22,544 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 98 [2021-01-06 16:04:22,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:04:22,544 INFO L225 Difference]: With dead ends: 108 [2021-01-06 16:04:22,545 INFO L226 Difference]: Without dead ends: 101 [2021-01-06 16:04:22,545 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2021-01-06 16:04:22,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-01-06 16:04:22,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2021-01-06 16:04:22,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2021-01-06 16:04:22,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2021-01-06 16:04:22,548 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 98 [2021-01-06 16:04:22,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:04:22,548 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2021-01-06 16:04:22,548 INFO L482 AbstractCegarLoop]: Interpolant automaton has 94 states. [2021-01-06 16:04:22,548 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2021-01-06 16:04:22,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-01-06 16:04:22,549 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:04:22,549 INFO L422 BasicCegarLoop]: trace histogram [91, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:04:22,764 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:04:22,765 INFO L429 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:04:22,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:04:22,765 INFO L82 PathProgramCache]: Analyzing trace with hash 219329902, now seen corresponding path program 90 times [2021-01-06 16:04:22,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:04:22,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438367243] [2021-01-06 16:04:22,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:04:22,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:04:28,939 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:04:28,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438367243] [2021-01-06 16:04:28,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138072121] [2021-01-06 16:04:28,940 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:04:29,152 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 47 check-sat command(s) [2021-01-06 16:04:29,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:04:29,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 687 conjuncts, 93 conjunts are in the unsatisfiable core [2021-01-06 16:04:29,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:04:29,300 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:04:29,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:04:29,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 95 [2021-01-06 16:04:29,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007787194] [2021-01-06 16:04:29,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 95 states [2021-01-06 16:04:29,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:04:29,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2021-01-06 16:04:29,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2021-01-06 16:04:29,302 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand 95 states. [2021-01-06 16:04:29,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:04:29,528 INFO L93 Difference]: Finished difference Result 109 states and 111 transitions. [2021-01-06 16:04:29,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-01-06 16:04:29,529 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 99 [2021-01-06 16:04:29,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:04:29,529 INFO L225 Difference]: With dead ends: 109 [2021-01-06 16:04:29,529 INFO L226 Difference]: Without dead ends: 102 [2021-01-06 16:04:29,530 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2021-01-06 16:04:29,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-01-06 16:04:29,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2021-01-06 16:04:29,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2021-01-06 16:04:29,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 103 transitions. [2021-01-06 16:04:29,533 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 103 transitions. Word has length 99 [2021-01-06 16:04:29,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:04:29,533 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 103 transitions. [2021-01-06 16:04:29,533 INFO L482 AbstractCegarLoop]: Interpolant automaton has 95 states. [2021-01-06 16:04:29,533 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 103 transitions. [2021-01-06 16:04:29,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-01-06 16:04:29,534 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:04:29,534 INFO L422 BasicCegarLoop]: trace histogram [92, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:04:29,748 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable92 [2021-01-06 16:04:29,749 INFO L429 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:04:29,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:04:29,749 INFO L82 PathProgramCache]: Analyzing trace with hash 130211982, now seen corresponding path program 91 times [2021-01-06 16:04:29,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:04:29,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646545228] [2021-01-06 16:04:29,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:04:29,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:04:36,062 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:04:36,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646545228] [2021-01-06 16:04:36,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446174199] [2021-01-06 16:04:36,062 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:04:36,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:04:36,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 694 conjuncts, 94 conjunts are in the unsatisfiable core [2021-01-06 16:04:36,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:04:36,374 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:04:36,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:04:36,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 96 [2021-01-06 16:04:36,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691982616] [2021-01-06 16:04:36,375 INFO L461 AbstractCegarLoop]: Interpolant automaton has 96 states [2021-01-06 16:04:36,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:04:36,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-01-06 16:04:36,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2021-01-06 16:04:36,376 INFO L87 Difference]: Start difference. First operand 102 states and 103 transitions. Second operand 96 states. [2021-01-06 16:04:36,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:04:36,634 INFO L93 Difference]: Finished difference Result 110 states and 112 transitions. [2021-01-06 16:04:36,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-01-06 16:04:36,635 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 100 [2021-01-06 16:04:36,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:04:36,636 INFO L225 Difference]: With dead ends: 110 [2021-01-06 16:04:36,636 INFO L226 Difference]: Without dead ends: 103 [2021-01-06 16:04:36,637 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2021-01-06 16:04:36,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-01-06 16:04:36,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2021-01-06 16:04:36,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2021-01-06 16:04:36,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2021-01-06 16:04:36,640 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 100 [2021-01-06 16:04:36,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:04:36,640 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2021-01-06 16:04:36,641 INFO L482 AbstractCegarLoop]: Interpolant automaton has 96 states. [2021-01-06 16:04:36,641 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2021-01-06 16:04:36,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-01-06 16:04:36,641 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:04:36,641 INFO L422 BasicCegarLoop]: trace histogram [93, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:04:36,856 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:04:36,857 INFO L429 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:04:36,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:04:36,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1662523758, now seen corresponding path program 92 times [2021-01-06 16:04:36,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:04:36,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196532808] [2021-01-06 16:04:36,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:04:36,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat