/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/loops-crafted-1/watermelon.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 07:13:38,707 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 07:13:38,709 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 07:13:38,767 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 07:13:38,768 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 07:13:38,771 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 07:13:38,775 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 07:13:38,781 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 07:13:38,784 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 07:13:38,791 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 07:13:38,795 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 07:13:38,797 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 07:13:38,797 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 07:13:38,801 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 07:13:38,803 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 07:13:38,806 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 07:13:38,815 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 07:13:38,819 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 07:13:38,826 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 07:13:38,834 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 07:13:38,836 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 07:13:38,838 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 07:13:38,839 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 07:13:38,841 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 07:13:38,850 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 07:13:38,855 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 07:13:38,856 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 07:13:38,858 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 07:13:38,859 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 07:13:38,860 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 07:13:38,860 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 07:13:38,861 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 07:13:38,867 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 07:13:38,868 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 07:13:38,869 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 07:13:38,870 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 07:13:38,873 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 07:13:38,925 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 07:13:38,925 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 07:13:38,929 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 07:13:38,930 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 07:13:38,930 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 07:13:38,930 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 07:13:38,930 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 07:13:38,931 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 07:13:38,931 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 07:13:38,931 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 07:13:38,932 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 07:13:38,933 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 07:13:38,933 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 07:13:38,933 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 07:13:38,933 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 07:13:38,934 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 07:13:38,934 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 07:13:38,934 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 07:13:38,934 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 07:13:38,934 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 07:13:38,935 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 07:13:38,935 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 07:13:38,935 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 07:13:38,935 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 07:13:38,935 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 07:13:38,936 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 07:13:39,377 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 07:13:39,406 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 07:13:39,409 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 07:13:39,410 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 07:13:39,411 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 07:13:39,412 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/watermelon.c [2020-12-23 07:13:39,499 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/ad0de089b/aa728dd37d1d438ca7484dc6addc6bda/FLAG6d571d870 [2020-12-23 07:13:40,077 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 07:13:40,080 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/watermelon.c [2020-12-23 07:13:40,091 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/ad0de089b/aa728dd37d1d438ca7484dc6addc6bda/FLAG6d571d870 [2020-12-23 07:13:40,417 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/ad0de089b/aa728dd37d1d438ca7484dc6addc6bda [2020-12-23 07:13:40,421 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 07:13:40,423 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 07:13:40,429 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 07:13:40,429 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 07:13:40,434 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 07:13:40,434 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 07:13:40" (1/1) ... [2020-12-23 07:13:40,437 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4553f148 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:13:40, skipping insertion in model container [2020-12-23 07:13:40,437 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 07:13:40" (1/1) ... [2020-12-23 07:13:40,446 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 07:13:40,467 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 07:13:40,626 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/loops-crafted-1/watermelon.c[373,386] left hand side expression in assignment: lhs: VariableLHS[~is_divisible~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~is_divisible~0,] left hand side expression in assignment: lhs: VariableLHS[~is_divisible~1,] left hand side expression in assignment: lhs: VariableLHS[~i~1,] left hand side expression in assignment: lhs: VariableLHS[~is_divisible~1,] left hand side expression in assignment: lhs: VariableLHS[~is_divisible1~0,] left hand side expression in assignment: lhs: VariableLHS[~is_divisible2~0,] [2020-12-23 07:13:40,648 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 07:13:40,659 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 07:13:40,674 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/loops-crafted-1/watermelon.c[373,386] left hand side expression in assignment: lhs: VariableLHS[~is_divisible~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~is_divisible~0,] left hand side expression in assignment: lhs: VariableLHS[~is_divisible~1,] left hand side expression in assignment: lhs: VariableLHS[~i~1,] left hand side expression in assignment: lhs: VariableLHS[~is_divisible~1,] left hand side expression in assignment: lhs: VariableLHS[~is_divisible1~0,] left hand side expression in assignment: lhs: VariableLHS[~is_divisible2~0,] [2020-12-23 07:13:40,682 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 07:13:40,699 INFO L208 MainTranslator]: Completed translation [2020-12-23 07:13:40,699 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:13:40 WrapperNode [2020-12-23 07:13:40,699 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 07:13:40,701 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 07:13:40,701 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 07:13:40,701 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 07:13:40,710 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:13:40" (1/1) ... [2020-12-23 07:13:40,717 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:13:40" (1/1) ... [2020-12-23 07:13:40,741 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 07:13:40,742 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 07:13:40,742 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 07:13:40,742 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 07:13:40,753 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:13:40" (1/1) ... [2020-12-23 07:13:40,753 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:13:40" (1/1) ... [2020-12-23 07:13:40,755 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:13:40" (1/1) ... [2020-12-23 07:13:40,755 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:13:40" (1/1) ... [2020-12-23 07:13:40,759 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:13:40" (1/1) ... [2020-12-23 07:13:40,764 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:13:40" (1/1) ... [2020-12-23 07:13:40,766 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:13:40" (1/1) ... [2020-12-23 07:13:40,768 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 07:13:40,769 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 07:13:40,769 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 07:13:40,769 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 07:13:40,770 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:13:40" (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 [2020-12-23 07:13:40,878 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 07:13:40,879 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 07:13:40,880 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 07:13:40,880 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 07:13:41,193 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 07:13:41,194 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2020-12-23 07:13:41,196 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:13:41 BoogieIcfgContainer [2020-12-23 07:13:41,196 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 07:13:41,198 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 07:13:41,198 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 07:13:41,203 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 07:13:41,203 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 07:13:40" (1/3) ... [2020-12-23 07:13:41,204 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f52de59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 07:13:41, skipping insertion in model container [2020-12-23 07:13:41,204 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:13:40" (2/3) ... [2020-12-23 07:13:41,205 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f52de59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 07:13:41, skipping insertion in model container [2020-12-23 07:13:41,205 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:13:41" (3/3) ... [2020-12-23 07:13:41,207 INFO L111 eAbstractionObserver]: Analyzing ICFG watermelon.c [2020-12-23 07:13:41,262 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 07:13:41,273 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 07:13:41,311 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 07:13:41,348 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 07:13:41,348 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 07:13:41,349 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 07:13:41,349 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 07:13:41,349 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 07:13:41,349 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 07:13:41,349 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 07:13:41,350 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 07:13:41,365 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-12-23 07:13:41,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 07:13:41,372 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:13:41,373 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:13:41,374 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:13:41,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:13:41,382 INFO L82 PathProgramCache]: Analyzing trace with hash -2143149025, now seen corresponding path program 1 times [2020-12-23 07:13:41,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:13:41,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439815693] [2020-12-23 07:13:41,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:13:41,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:13:41,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:13:41,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439815693] [2020-12-23 07:13:41,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:13:41,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-23 07:13:41,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731586988] [2020-12-23 07:13:41,796 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 07:13:41,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:13:41,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 07:13:41,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-23 07:13:41,822 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 8 states. [2020-12-23 07:13:42,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:13:42,155 INFO L93 Difference]: Finished difference Result 64 states and 81 transitions. [2020-12-23 07:13:42,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 07:13:42,157 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-12-23 07:13:42,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:13:42,167 INFO L225 Difference]: With dead ends: 64 [2020-12-23 07:13:42,167 INFO L226 Difference]: Without dead ends: 29 [2020-12-23 07:13:42,171 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2020-12-23 07:13:42,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-23 07:13:42,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 24. [2020-12-23 07:13:42,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-23 07:13:42,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2020-12-23 07:13:42,208 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 11 [2020-12-23 07:13:42,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:13:42,209 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2020-12-23 07:13:42,209 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 07:13:42,209 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2020-12-23 07:13:42,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 07:13:42,210 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:13:42,210 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:13:42,211 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 07:13:42,211 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:13:42,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:13:42,212 INFO L82 PathProgramCache]: Analyzing trace with hash -906524851, now seen corresponding path program 1 times [2020-12-23 07:13:42,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:13:42,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785662182] [2020-12-23 07:13:42,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:13:42,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:13:42,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:13:42,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785662182] [2020-12-23 07:13:42,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:13:42,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 07:13:42,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625064346] [2020-12-23 07:13:42,290 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 07:13:42,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:13:42,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 07:13:42,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 07:13:42,293 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand 3 states. [2020-12-23 07:13:42,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:13:42,325 INFO L93 Difference]: Finished difference Result 35 states and 43 transitions. [2020-12-23 07:13:42,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 07:13:42,334 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-12-23 07:13:42,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:13:42,337 INFO L225 Difference]: With dead ends: 35 [2020-12-23 07:13:42,337 INFO L226 Difference]: Without dead ends: 28 [2020-12-23 07:13:42,338 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 07:13:42,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-23 07:13:42,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-12-23 07:13:42,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-23 07:13:42,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2020-12-23 07:13:42,351 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 13 [2020-12-23 07:13:42,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:13:42,352 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2020-12-23 07:13:42,352 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 07:13:42,353 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2020-12-23 07:13:42,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 07:13:42,354 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:13:42,354 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:13:42,355 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 07:13:42,355 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:13:42,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:13:42,356 INFO L82 PathProgramCache]: Analyzing trace with hash 1897717841, now seen corresponding path program 1 times [2020-12-23 07:13:42,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:13:42,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478623959] [2020-12-23 07:13:42,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:13:42,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:13:42,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:13:42,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478623959] [2020-12-23 07:13:42,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:13:42,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 07:13:42,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763577332] [2020-12-23 07:13:42,433 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 07:13:42,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:13:42,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 07:13:42,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 07:13:42,434 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand 3 states. [2020-12-23 07:13:42,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:13:42,455 INFO L93 Difference]: Finished difference Result 48 states and 59 transitions. [2020-12-23 07:13:42,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 07:13:42,455 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-12-23 07:13:42,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:13:42,456 INFO L225 Difference]: With dead ends: 48 [2020-12-23 07:13:42,457 INFO L226 Difference]: Without dead ends: 28 [2020-12-23 07:13:42,457 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 07:13:42,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-23 07:13:42,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-12-23 07:13:42,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-23 07:13:42,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2020-12-23 07:13:42,463 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 13 [2020-12-23 07:13:42,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:13:42,463 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2020-12-23 07:13:42,464 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 07:13:42,464 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2020-12-23 07:13:42,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 07:13:42,465 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:13:42,465 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:13:42,465 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-23 07:13:42,465 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:13:42,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:13:42,466 INFO L82 PathProgramCache]: Analyzing trace with hash 983883823, now seen corresponding path program 1 times [2020-12-23 07:13:42,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:13:42,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570461928] [2020-12-23 07:13:42,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:13:42,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:13:42,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:13:42,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570461928] [2020-12-23 07:13:42,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054924664] [2020-12-23 07:13:42,548 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 [2020-12-23 07:13:42,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:13:42,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 07:13:42,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:13:42,708 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:13:42,763 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:13:42,803 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:13:42,808 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:13:42,817 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 07:13:42,911 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 07:13:43,103 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 07:13:43,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:13:43,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2020-12-23 07:13:43,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227276688] [2020-12-23 07:13:43,105 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 07:13:43,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:13:43,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 07:13:43,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-23 07:13:43,107 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand 5 states. [2020-12-23 07:13:43,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:13:43,274 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2020-12-23 07:13:43,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 07:13:43,275 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-12-23 07:13:43,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:13:43,276 INFO L225 Difference]: With dead ends: 44 [2020-12-23 07:13:43,276 INFO L226 Difference]: Without dead ends: 32 [2020-12-23 07:13:43,277 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-12-23 07:13:43,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-23 07:13:43,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2020-12-23 07:13:43,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-23 07:13:43,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2020-12-23 07:13:43,291 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 15 [2020-12-23 07:13:43,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:13:43,291 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2020-12-23 07:13:43,291 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 07:13:43,291 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2020-12-23 07:13:43,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 07:13:43,292 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:13:43,292 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:13:43,505 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:13:43,506 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:13:43,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:13:43,508 INFO L82 PathProgramCache]: Analyzing trace with hash 891572815, now seen corresponding path program 1 times [2020-12-23 07:13:43,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:13:43,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278403816] [2020-12-23 07:13:43,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:13:43,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:13:43,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:13:43,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278403816] [2020-12-23 07:13:43,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419189811] [2020-12-23 07:13:43,568 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 [2020-12-23 07:13:43,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:13:43,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 07:13:43,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:13:43,702 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:13:43,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:13:43,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-12-23 07:13:43,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554984232] [2020-12-23 07:13:43,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 07:13:43,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:13:43,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 07:13:43,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 07:13:43,706 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand 6 states. [2020-12-23 07:13:43,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:13:43,730 INFO L93 Difference]: Finished difference Result 50 states and 60 transitions. [2020-12-23 07:13:43,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 07:13:43,731 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-12-23 07:13:43,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:13:43,732 INFO L225 Difference]: With dead ends: 50 [2020-12-23 07:13:43,732 INFO L226 Difference]: Without dead ends: 30 [2020-12-23 07:13:43,732 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 07:13:43,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-23 07:13:43,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-12-23 07:13:43,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-23 07:13:43,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2020-12-23 07:13:43,739 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 15 [2020-12-23 07:13:43,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:13:43,740 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2020-12-23 07:13:43,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 07:13:43,740 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2020-12-23 07:13:43,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 07:13:43,741 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:13:43,741 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:13:43,955 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:13:43,956 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:13:43,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:13:43,957 INFO L82 PathProgramCache]: Analyzing trace with hash 353844429, now seen corresponding path program 2 times [2020-12-23 07:13:43,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:13:43,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013161799] [2020-12-23 07:13:43,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:13:43,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:13:44,152 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 07:13:44,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013161799] [2020-12-23 07:13:44,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:13:44,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-23 07:13:44,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579169905] [2020-12-23 07:13:44,154 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 07:13:44,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:13:44,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 07:13:44,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-23 07:13:44,156 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand 6 states. [2020-12-23 07:13:44,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:13:44,225 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2020-12-23 07:13:44,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 07:13:44,226 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-12-23 07:13:44,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:13:44,227 INFO L225 Difference]: With dead ends: 34 [2020-12-23 07:13:44,228 INFO L226 Difference]: Without dead ends: 29 [2020-12-23 07:13:44,230 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-23 07:13:44,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-23 07:13:44,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-12-23 07:13:44,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-23 07:13:44,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-12-23 07:13:44,256 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 17 [2020-12-23 07:13:44,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:13:44,256 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-12-23 07:13:44,257 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 07:13:44,257 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-12-23 07:13:44,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-23 07:13:44,259 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:13:44,259 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:13:44,259 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-23 07:13:44,259 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:13:44,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:13:44,266 INFO L82 PathProgramCache]: Analyzing trace with hash -1453414625, now seen corresponding path program 1 times [2020-12-23 07:13:44,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:13:44,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084791236] [2020-12-23 07:13:44,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:13:44,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:13:44,346 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 07:13:44,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084791236] [2020-12-23 07:13:44,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626766380] [2020-12-23 07:13:44,347 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 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 [2020-12-23 07:13:44,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:13:44,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 07:13:44,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:13:44,491 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 07:13:44,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:13:44,492 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-12-23 07:13:44,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628660873] [2020-12-23 07:13:44,492 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 07:13:44,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:13:44,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 07:13:44,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-12-23 07:13:44,494 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 10 states. [2020-12-23 07:13:44,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:13:44,542 INFO L93 Difference]: Finished difference Result 62 states and 68 transitions. [2020-12-23 07:13:44,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 07:13:44,542 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 21 [2020-12-23 07:13:44,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:13:44,543 INFO L225 Difference]: With dead ends: 62 [2020-12-23 07:13:44,543 INFO L226 Difference]: Without dead ends: 50 [2020-12-23 07:13:44,544 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-12-23 07:13:44,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-23 07:13:44,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 32. [2020-12-23 07:13:44,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-23 07:13:44,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2020-12-23 07:13:44,552 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 21 [2020-12-23 07:13:44,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:13:44,552 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2020-12-23 07:13:44,553 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 07:13:44,553 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2020-12-23 07:13:44,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-23 07:13:44,554 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:13:44,554 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:13:44,758 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:13:44,760 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:13:44,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:13:44,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1197096229, now seen corresponding path program 1 times [2020-12-23 07:13:44,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:13:44,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119804295] [2020-12-23 07:13:44,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:13:44,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:13:44,813 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 07:13:44,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119804295] [2020-12-23 07:13:44,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832178587] [2020-12-23 07:13:44,814 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 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 [2020-12-23 07:13:44,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:13:44,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 07:13:44,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:13:44,933 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 07:13:44,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:13:44,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-12-23 07:13:44,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962578340] [2020-12-23 07:13:44,934 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 07:13:44,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:13:44,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 07:13:44,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 07:13:44,936 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand 6 states. [2020-12-23 07:13:44,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:13:44,966 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2020-12-23 07:13:44,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 07:13:44,967 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-12-23 07:13:44,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:13:44,967 INFO L225 Difference]: With dead ends: 45 [2020-12-23 07:13:44,968 INFO L226 Difference]: Without dead ends: 38 [2020-12-23 07:13:44,968 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 07:13:44,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-23 07:13:44,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2020-12-23 07:13:44,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-23 07:13:44,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2020-12-23 07:13:44,976 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 21 [2020-12-23 07:13:44,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:13:44,976 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2020-12-23 07:13:44,976 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 07:13:44,977 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2020-12-23 07:13:44,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-23 07:13:44,977 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:13:44,978 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:13:45,192 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:13:45,193 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:13:45,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:13:45,194 INFO L82 PathProgramCache]: Analyzing trace with hash -1604143171, now seen corresponding path program 2 times [2020-12-23 07:13:45,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:13:45,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151923397] [2020-12-23 07:13:45,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:13:45,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:13:45,298 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 07:13:45,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151923397] [2020-12-23 07:13:45,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762981753] [2020-12-23 07:13:45,299 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 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 [2020-12-23 07:13:45,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:13:45,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:13:45,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 07:13:45,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:13:45,452 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 07:13:45,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:13:45,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-12-23 07:13:45,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814697456] [2020-12-23 07:13:45,453 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 07:13:45,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:13:45,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 07:13:45,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-12-23 07:13:45,456 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 10 states. [2020-12-23 07:13:45,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:13:45,508 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2020-12-23 07:13:45,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 07:13:45,509 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2020-12-23 07:13:45,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:13:45,513 INFO L225 Difference]: With dead ends: 59 [2020-12-23 07:13:45,513 INFO L226 Difference]: Without dead ends: 54 [2020-12-23 07:13:45,514 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-12-23 07:13:45,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-23 07:13:45,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 38. [2020-12-23 07:13:45,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-23 07:13:45,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2020-12-23 07:13:45,535 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 23 [2020-12-23 07:13:45,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:13:45,535 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2020-12-23 07:13:45,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 07:13:45,535 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2020-12-23 07:13:45,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-23 07:13:45,541 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:13:45,542 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:13:45,755 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:13:45,756 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:13:45,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:13:45,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1602296129, now seen corresponding path program 1 times [2020-12-23 07:13:45,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:13:45,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115668099] [2020-12-23 07:13:45,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:13:45,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:13:45,853 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-23 07:13:45,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115668099] [2020-12-23 07:13:45,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:13:45,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-23 07:13:45,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705316712] [2020-12-23 07:13:45,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 07:13:45,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:13:45,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 07:13:45,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-23 07:13:45,855 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand 7 states. [2020-12-23 07:13:45,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:13:45,948 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2020-12-23 07:13:45,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 07:13:45,948 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2020-12-23 07:13:45,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:13:45,953 INFO L225 Difference]: With dead ends: 49 [2020-12-23 07:13:45,954 INFO L226 Difference]: Without dead ends: 43 [2020-12-23 07:13:45,955 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2020-12-23 07:13:45,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-12-23 07:13:45,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2020-12-23 07:13:45,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-23 07:13:45,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2020-12-23 07:13:45,970 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 23 [2020-12-23 07:13:45,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:13:45,970 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2020-12-23 07:13:45,970 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 07:13:45,970 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2020-12-23 07:13:45,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-23 07:13:45,971 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:13:45,971 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:13:45,972 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-23 07:13:45,972 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:13:45,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:13:45,972 INFO L82 PathProgramCache]: Analyzing trace with hash -1934230497, now seen corresponding path program 3 times [2020-12-23 07:13:45,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:13:45,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534273077] [2020-12-23 07:13:45,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:13:45,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:13:46,274 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:13:46,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534273077] [2020-12-23 07:13:46,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359620139] [2020-12-23 07:13:46,275 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 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 [2020-12-23 07:13:46,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 07:13:46,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:13:46,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 07:13:46,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:13:46,343 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:13:46,504 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:13:46,525 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:13:46,529 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:13:46,537 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 07:13:46,577 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 07:13:46,694 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:13:46,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:13:46,695 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2020-12-23 07:13:46,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159188306] [2020-12-23 07:13:46,696 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 07:13:46,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:13:46,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 07:13:46,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2020-12-23 07:13:46,697 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 19 states. [2020-12-23 07:13:47,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:13:47,173 INFO L93 Difference]: Finished difference Result 55 states and 59 transitions. [2020-12-23 07:13:47,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 07:13:47,173 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 25 [2020-12-23 07:13:47,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:13:47,174 INFO L225 Difference]: With dead ends: 55 [2020-12-23 07:13:47,174 INFO L226 Difference]: Without dead ends: 38 [2020-12-23 07:13:47,175 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2020-12-23 07:13:47,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-23 07:13:47,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-12-23 07:13:47,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-23 07:13:47,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2020-12-23 07:13:47,182 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 25 [2020-12-23 07:13:47,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:13:47,182 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2020-12-23 07:13:47,182 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 07:13:47,182 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2020-12-23 07:13:47,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-23 07:13:47,183 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:13:47,183 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:13:47,398 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:13:47,398 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:13:47,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:13:47,399 INFO L82 PathProgramCache]: Analyzing trace with hash 836427775, now seen corresponding path program 2 times [2020-12-23 07:13:47,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:13:47,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921117251] [2020-12-23 07:13:47,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:13:47,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:13:47,653 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:13:47,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921117251] [2020-12-23 07:13:47,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578208344] [2020-12-23 07:13:47,654 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 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 [2020-12-23 07:13:47,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:13:47,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:13:47,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 07:13:47,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:13:47,721 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:13:47,850 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:13:47,900 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:13:47,912 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 07:13:48,035 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:13:48,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:13:48,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2020-12-23 07:13:48,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440992887] [2020-12-23 07:13:48,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 07:13:48,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:13:48,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 07:13:48,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2020-12-23 07:13:48,039 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand 19 states. [2020-12-23 07:13:48,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:13:48,485 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2020-12-23 07:13:48,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 07:13:48,486 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 25 [2020-12-23 07:13:48,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:13:48,487 INFO L225 Difference]: With dead ends: 47 [2020-12-23 07:13:48,487 INFO L226 Difference]: Without dead ends: 41 [2020-12-23 07:13:48,488 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=175, Invalid=425, Unknown=0, NotChecked=0, Total=600 [2020-12-23 07:13:48,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-23 07:13:48,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2020-12-23 07:13:48,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-23 07:13:48,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2020-12-23 07:13:48,505 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 25 [2020-12-23 07:13:48,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:13:48,506 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2020-12-23 07:13:48,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 07:13:48,506 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2020-12-23 07:13:48,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-23 07:13:48,509 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:13:48,509 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:13:48,724 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:13:48,724 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:13:48,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:13:48,725 INFO L82 PathProgramCache]: Analyzing trace with hash 924111969, now seen corresponding path program 3 times [2020-12-23 07:13:48,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:13:48,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155542830] [2020-12-23 07:13:48,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:13:48,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:13:49,055 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:13:49,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155542830] [2020-12-23 07:13:49,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215339846] [2020-12-23 07:13:49,057 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 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 [2020-12-23 07:13:49,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 07:13:49,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:13:49,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 07:13:49,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:13:49,131 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:13:49,354 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 07:13:49,386 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:13:49,388 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:13:49,393 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 07:13:49,411 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 07:13:49,557 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:13:49,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:13:49,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2020-12-23 07:13:49,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875286473] [2020-12-23 07:13:49,558 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-23 07:13:49,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:13:49,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-23 07:13:49,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2020-12-23 07:13:49,560 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand 24 states. [2020-12-23 07:13:50,049 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 28 [2020-12-23 07:13:50,202 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-23 07:13:50,379 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-23 07:13:50,549 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-23 07:13:50,697 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 30 [2020-12-23 07:13:50,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:13:50,920 INFO L93 Difference]: Finished difference Result 83 states and 88 transitions. [2020-12-23 07:13:50,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 07:13:50,920 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-12-23 07:13:50,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:13:50,921 INFO L225 Difference]: With dead ends: 83 [2020-12-23 07:13:50,921 INFO L226 Difference]: Without dead ends: 64 [2020-12-23 07:13:50,922 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=258, Invalid=932, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 07:13:50,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-23 07:13:50,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 42. [2020-12-23 07:13:50,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-23 07:13:50,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2020-12-23 07:13:50,928 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 27 [2020-12-23 07:13:50,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:13:50,929 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2020-12-23 07:13:50,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-23 07:13:50,929 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2020-12-23 07:13:50,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-23 07:13:50,929 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:13:50,929 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:13:51,134 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-23 07:13:51,135 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:13:51,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:13:51,136 INFO L82 PathProgramCache]: Analyzing trace with hash -98803427, now seen corresponding path program 4 times [2020-12-23 07:13:51,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:13:51,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702433286] [2020-12-23 07:13:51,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:13:51,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:13:51,431 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:13:51,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702433286] [2020-12-23 07:13:51,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977381406] [2020-12-23 07:13:51,432 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 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 [2020-12-23 07:13:51,483 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:13:51,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:13:51,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 07:13:51,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:13:51,493 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:13:51,686 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:13:51,714 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:13:51,718 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 07:13:51,873 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:13:51,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:13:51,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2020-12-23 07:13:51,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097250897] [2020-12-23 07:13:51,875 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-23 07:13:51,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:13:51,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-23 07:13:51,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2020-12-23 07:13:51,876 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 24 states. [2020-12-23 07:13:52,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:13:52,547 INFO L93 Difference]: Finished difference Result 65 states and 68 transitions. [2020-12-23 07:13:52,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 07:13:52,547 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-12-23 07:13:52,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:13:52,548 INFO L225 Difference]: With dead ends: 65 [2020-12-23 07:13:52,548 INFO L226 Difference]: Without dead ends: 59 [2020-12-23 07:13:52,549 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=284, Invalid=772, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 07:13:52,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-12-23 07:13:52,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 44. [2020-12-23 07:13:52,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-23 07:13:52,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2020-12-23 07:13:52,557 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 27 [2020-12-23 07:13:52,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:13:52,558 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2020-12-23 07:13:52,558 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-23 07:13:52,558 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2020-12-23 07:13:52,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-23 07:13:52,558 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:13:52,558 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:13:52,769 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:13:52,770 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:13:52,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:13:52,771 INFO L82 PathProgramCache]: Analyzing trace with hash 1588252031, now seen corresponding path program 5 times [2020-12-23 07:13:52,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:13:52,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552181142] [2020-12-23 07:13:52,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:13:52,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:13:53,073 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:13:53,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552181142] [2020-12-23 07:13:53,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267095905] [2020-12-23 07:13:53,074 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 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 [2020-12-23 07:13:53,128 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-12-23 07:13:53,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:13:53,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 07:13:53,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:13:53,151 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:13:53,325 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:13:53,342 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:13:53,350 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:13:53,352 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 07:13:53,372 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 07:13:53,492 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:13:53,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:13:53,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2020-12-23 07:13:53,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332974673] [2020-12-23 07:13:53,494 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-23 07:13:53,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:13:53,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-23 07:13:53,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2020-12-23 07:13:53,495 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand 23 states. [2020-12-23 07:13:54,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:13:54,044 INFO L93 Difference]: Finished difference Result 63 states and 67 transitions. [2020-12-23 07:13:54,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 07:13:54,044 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 29 [2020-12-23 07:13:54,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:13:54,045 INFO L225 Difference]: With dead ends: 63 [2020-12-23 07:13:54,045 INFO L226 Difference]: Without dead ends: 44 [2020-12-23 07:13:54,046 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=192, Invalid=678, Unknown=0, NotChecked=0, Total=870 [2020-12-23 07:13:54,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-23 07:13:54,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-12-23 07:13:54,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-23 07:13:54,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2020-12-23 07:13:54,055 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 29 [2020-12-23 07:13:54,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:13:54,055 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2020-12-23 07:13:54,055 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-23 07:13:54,055 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2020-12-23 07:13:54,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-23 07:13:54,055 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:13:54,056 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:13:54,270 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-23 07:13:54,271 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:13:54,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:13:54,272 INFO L82 PathProgramCache]: Analyzing trace with hash -462032417, now seen corresponding path program 4 times [2020-12-23 07:13:54,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:13:54,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845173222] [2020-12-23 07:13:54,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:13:54,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:13:54,577 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:13:54,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845173222] [2020-12-23 07:13:54,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407664086] [2020-12-23 07:13:54,579 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 [2020-12-23 07:13:54,640 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:13:54,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:13:54,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 07:13:54,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:13:54,658 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:13:54,816 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:13:54,846 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:13:54,850 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 07:13:54,969 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:13:54,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:13:54,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2020-12-23 07:13:54,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234814691] [2020-12-23 07:13:54,970 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-23 07:13:54,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:13:54,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-23 07:13:54,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2020-12-23 07:13:54,971 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand 23 states. [2020-12-23 07:13:55,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:13:55,519 INFO L93 Difference]: Finished difference Result 53 states and 56 transitions. [2020-12-23 07:13:55,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 07:13:55,520 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 29 [2020-12-23 07:13:55,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:13:55,520 INFO L225 Difference]: With dead ends: 53 [2020-12-23 07:13:55,520 INFO L226 Difference]: Without dead ends: 47 [2020-12-23 07:13:55,521 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=247, Invalid=623, Unknown=0, NotChecked=0, Total=870 [2020-12-23 07:13:55,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-23 07:13:55,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2020-12-23 07:13:55,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-23 07:13:55,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2020-12-23 07:13:55,529 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 29 [2020-12-23 07:13:55,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:13:55,529 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2020-12-23 07:13:55,529 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-23 07:13:55,529 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2020-12-23 07:13:55,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-23 07:13:55,530 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:13:55,530 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:13:55,743 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-23 07:13:55,744 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:13:55,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:13:55,744 INFO L82 PathProgramCache]: Analyzing trace with hash -1355616703, now seen corresponding path program 5 times [2020-12-23 07:13:55,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:13:55,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674873562] [2020-12-23 07:13:55,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:13:55,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:13:56,074 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:13:56,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674873562] [2020-12-23 07:13:56,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48754453] [2020-12-23 07:13:56,075 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 [2020-12-23 07:13:56,123 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-12-23 07:13:56,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:13:56,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 07:13:56,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:13:56,130 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:13:56,400 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 07:13:56,415 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:13:56,417 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:13:56,419 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 07:13:56,459 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 07:13:56,617 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:13:56,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:13:56,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 28 [2020-12-23 07:13:56,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115235246] [2020-12-23 07:13:56,619 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-23 07:13:56,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:13:56,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-23 07:13:56,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2020-12-23 07:13:56,620 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand 28 states. [2020-12-23 07:13:58,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:13:58,046 INFO L93 Difference]: Finished difference Result 93 states and 98 transitions. [2020-12-23 07:13:58,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 07:13:58,048 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-12-23 07:13:58,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:13:58,049 INFO L225 Difference]: With dead ends: 93 [2020-12-23 07:13:58,049 INFO L226 Difference]: Without dead ends: 72 [2020-12-23 07:13:58,050 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=324, Invalid=1236, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 07:13:58,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-12-23 07:13:58,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 48. [2020-12-23 07:13:58,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-23 07:13:58,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2020-12-23 07:13:58,062 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 31 [2020-12-23 07:13:58,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:13:58,063 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2020-12-23 07:13:58,063 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-23 07:13:58,063 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2020-12-23 07:13:58,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-23 07:13:58,064 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:13:58,064 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:13:58,279 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 07:13:58,280 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:13:58,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:13:58,281 INFO L82 PathProgramCache]: Analyzing trace with hash 943358845, now seen corresponding path program 6 times [2020-12-23 07:13:58,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:13:58,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325606324] [2020-12-23 07:13:58,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:13:58,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:13:58,608 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:13:58,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325606324] [2020-12-23 07:13:58,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540283972] [2020-12-23 07:13:58,608 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 [2020-12-23 07:13:58,658 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-23 07:13:58,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:13:58,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 07:13:58,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:13:58,665 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:13:58,884 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:13:58,914 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:13:58,920 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 07:13:59,157 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:13:59,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:13:59,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 28 [2020-12-23 07:13:59,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92521207] [2020-12-23 07:13:59,159 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-23 07:13:59,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:13:59,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-23 07:13:59,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=606, Unknown=0, NotChecked=0, Total=756 [2020-12-23 07:13:59,161 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand 28 states. [2020-12-23 07:13:59,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:13:59,903 INFO L93 Difference]: Finished difference Result 71 states and 74 transitions. [2020-12-23 07:13:59,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 07:13:59,903 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-12-23 07:13:59,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:13:59,904 INFO L225 Difference]: With dead ends: 71 [2020-12-23 07:13:59,904 INFO L226 Difference]: Without dead ends: 65 [2020-12-23 07:13:59,905 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=372, Invalid=1034, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 07:13:59,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-12-23 07:13:59,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 50. [2020-12-23 07:13:59,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-23 07:13:59,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2020-12-23 07:13:59,914 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 31 [2020-12-23 07:13:59,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:13:59,914 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2020-12-23 07:13:59,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-23 07:13:59,914 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2020-12-23 07:13:59,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-23 07:13:59,915 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:13:59,915 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:14:00,128 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 07:14:00,129 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:14:00,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:14:00,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1916151841, now seen corresponding path program 7 times [2020-12-23 07:14:00,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:14:00,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100189444] [2020-12-23 07:14:00,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:14:00,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:14:00,491 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:14:00,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100189444] [2020-12-23 07:14:00,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60321204] [2020-12-23 07:14:00,492 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 [2020-12-23 07:14:00,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:14:00,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 07:14:00,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:14:00,557 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:14:00,811 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:14:00,828 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:14:00,830 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:14:00,832 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 07:14:00,843 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 07:14:00,996 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:14:00,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:14:00,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 27 [2020-12-23 07:14:00,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413404708] [2020-12-23 07:14:00,997 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-23 07:14:00,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:14:00,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-23 07:14:00,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=564, Unknown=0, NotChecked=0, Total=702 [2020-12-23 07:14:00,999 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 27 states. [2020-12-23 07:14:01,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:14:01,781 INFO L93 Difference]: Finished difference Result 71 states and 75 transitions. [2020-12-23 07:14:01,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 07:14:01,782 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 33 [2020-12-23 07:14:01,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:14:01,782 INFO L225 Difference]: With dead ends: 71 [2020-12-23 07:14:01,782 INFO L226 Difference]: Without dead ends: 50 [2020-12-23 07:14:01,783 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=252, Invalid=938, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 07:14:01,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-23 07:14:01,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-12-23 07:14:01,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-23 07:14:01,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2020-12-23 07:14:01,791 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 33 [2020-12-23 07:14:01,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:14:01,791 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2020-12-23 07:14:01,792 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-23 07:14:01,792 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2020-12-23 07:14:01,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-23 07:14:01,792 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:14:01,792 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:14:02,005 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:14:02,006 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:14:02,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:14:02,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1672289471, now seen corresponding path program 6 times [2020-12-23 07:14:02,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:14:02,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605133333] [2020-12-23 07:14:02,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:14:02,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:14:02,390 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:14:02,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605133333] [2020-12-23 07:14:02,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517625127] [2020-12-23 07:14:02,391 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 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 [2020-12-23 07:14:02,443 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-12-23 07:14:02,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:14:02,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 07:14:02,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:14:02,455 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:14:02,696 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:14:02,729 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:14:02,732 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 07:14:02,901 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:14:02,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:14:02,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 27 [2020-12-23 07:14:02,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383728960] [2020-12-23 07:14:02,902 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-23 07:14:02,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:14:02,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-23 07:14:02,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=556, Unknown=0, NotChecked=0, Total=702 [2020-12-23 07:14:02,903 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand 27 states. [2020-12-23 07:14:03,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:14:03,598 INFO L93 Difference]: Finished difference Result 59 states and 62 transitions. [2020-12-23 07:14:03,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 07:14:03,599 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 33 [2020-12-23 07:14:03,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:14:03,599 INFO L225 Difference]: With dead ends: 59 [2020-12-23 07:14:03,599 INFO L226 Difference]: Without dead ends: 53 [2020-12-23 07:14:03,600 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=332, Invalid=858, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 07:14:03,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-12-23 07:14:03,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2020-12-23 07:14:03,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-23 07:14:03,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2020-12-23 07:14:03,609 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 33 [2020-12-23 07:14:03,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:14:03,610 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2020-12-23 07:14:03,610 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-23 07:14:03,610 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2020-12-23 07:14:03,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-23 07:14:03,610 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:14:03,610 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:14:03,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:14:03,824 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:14:03,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:14:03,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1028317473, now seen corresponding path program 7 times [2020-12-23 07:14:03,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:14:03,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782790347] [2020-12-23 07:14:03,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:14:03,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:14:04,253 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:14:04,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782790347] [2020-12-23 07:14:04,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322042396] [2020-12-23 07:14:04,254 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 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 [2020-12-23 07:14:04,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:14:04,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-23 07:14:04,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:14:04,304 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:14:04,646 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 07:14:04,664 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:14:04,665 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:14:04,667 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 07:14:04,676 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 07:14:04,912 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:14:04,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:14:04,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 32 [2020-12-23 07:14:04,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973165100] [2020-12-23 07:14:04,913 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-23 07:14:04,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:14:04,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-23 07:14:04,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=809, Unknown=0, NotChecked=0, Total=992 [2020-12-23 07:14:04,914 INFO L87 Difference]: Start difference. First operand 51 states and 54 transitions. Second operand 32 states. [2020-12-23 07:14:06,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:14:06,640 INFO L93 Difference]: Finished difference Result 103 states and 108 transitions. [2020-12-23 07:14:06,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-23 07:14:06,640 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2020-12-23 07:14:06,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:14:06,641 INFO L225 Difference]: With dead ends: 103 [2020-12-23 07:14:06,641 INFO L226 Difference]: Without dead ends: 80 [2020-12-23 07:14:06,642 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=399, Invalid=1581, Unknown=0, NotChecked=0, Total=1980 [2020-12-23 07:14:06,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-12-23 07:14:06,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 54. [2020-12-23 07:14:06,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-23 07:14:06,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2020-12-23 07:14:06,654 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 35 [2020-12-23 07:14:06,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:14:06,654 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2020-12-23 07:14:06,654 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-23 07:14:06,654 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2020-12-23 07:14:06,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-23 07:14:06,654 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:14:06,655 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:14:06,868 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:14:06,869 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:14:06,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:14:06,870 INFO L82 PathProgramCache]: Analyzing trace with hash 208821981, now seen corresponding path program 8 times [2020-12-23 07:14:06,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:14:06,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184004405] [2020-12-23 07:14:06,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:14:06,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:14:07,297 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:14:07,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184004405] [2020-12-23 07:14:07,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812443409] [2020-12-23 07:14:07,298 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 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 [2020-12-23 07:14:07,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:14:07,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:14:07,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-23 07:14:07,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:14:07,356 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:14:07,664 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:14:07,689 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:14:07,692 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 07:14:07,943 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:14:07,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:14:07,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 32 [2020-12-23 07:14:07,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513565314] [2020-12-23 07:14:07,944 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-23 07:14:07,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:14:07,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-23 07:14:07,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=798, Unknown=0, NotChecked=0, Total=992 [2020-12-23 07:14:07,945 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand 32 states. [2020-12-23 07:14:08,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:14:08,893 INFO L93 Difference]: Finished difference Result 77 states and 80 transitions. [2020-12-23 07:14:08,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 07:14:08,893 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2020-12-23 07:14:08,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:14:08,894 INFO L225 Difference]: With dead ends: 77 [2020-12-23 07:14:08,894 INFO L226 Difference]: Without dead ends: 71 [2020-12-23 07:14:08,895 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=473, Invalid=1333, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 07:14:08,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-12-23 07:14:08,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 56. [2020-12-23 07:14:08,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-23 07:14:08,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2020-12-23 07:14:08,905 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 35 [2020-12-23 07:14:08,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:14:08,905 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2020-12-23 07:14:08,905 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-23 07:14:08,905 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2020-12-23 07:14:08,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-23 07:14:08,905 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:14:08,906 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:14:09,118 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-23 07:14:09,119 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:14:09,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:14:09,120 INFO L82 PathProgramCache]: Analyzing trace with hash 863525695, now seen corresponding path program 9 times [2020-12-23 07:14:09,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:14:09,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337811787] [2020-12-23 07:14:09,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:14:09,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:14:09,531 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 27 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:14:09,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337811787] [2020-12-23 07:14:09,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532671003] [2020-12-23 07:14:09,532 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 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 [2020-12-23 07:14:09,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-12-23 07:14:09,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:14:09,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 07:14:09,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:14:09,598 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:14:09,894 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:14:09,908 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:14:09,909 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:14:09,911 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 07:14:09,920 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 07:14:10,119 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:14:10,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:14:10,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 31 [2020-12-23 07:14:10,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12893096] [2020-12-23 07:14:10,120 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-23 07:14:10,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:14:10,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-23 07:14:10,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=750, Unknown=0, NotChecked=0, Total=930 [2020-12-23 07:14:10,121 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand 31 states. [2020-12-23 07:14:10,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:14:10,993 INFO L93 Difference]: Finished difference Result 79 states and 83 transitions. [2020-12-23 07:14:10,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 07:14:10,993 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 37 [2020-12-23 07:14:10,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:14:10,994 INFO L225 Difference]: With dead ends: 79 [2020-12-23 07:14:10,994 INFO L226 Difference]: Without dead ends: 56 [2020-12-23 07:14:10,995 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=321, Invalid=1239, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 07:14:10,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-23 07:14:11,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2020-12-23 07:14:11,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-23 07:14:11,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2020-12-23 07:14:11,012 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 37 [2020-12-23 07:14:11,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:14:11,013 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2020-12-23 07:14:11,013 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-23 07:14:11,013 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2020-12-23 07:14:11,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-23 07:14:11,014 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:14:11,014 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:14:11,216 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-23 07:14:11,217 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:14:11,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:14:11,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1276272481, now seen corresponding path program 8 times [2020-12-23 07:14:11,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:14:11,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572878004] [2020-12-23 07:14:11,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:14:11,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:14:11,688 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:14:11,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572878004] [2020-12-23 07:14:11,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620667131] [2020-12-23 07:14:11,689 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 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 [2020-12-23 07:14:11,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:14:11,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:14:11,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 07:14:11,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:14:11,747 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:14:12,026 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:14:12,063 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:14:12,066 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 07:14:12,276 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:14:12,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:14:12,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 31 [2020-12-23 07:14:12,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944067620] [2020-12-23 07:14:12,277 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-23 07:14:12,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:14:12,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-23 07:14:12,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=740, Unknown=0, NotChecked=0, Total=930 [2020-12-23 07:14:12,278 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand 31 states. [2020-12-23 07:14:13,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:14:13,238 INFO L93 Difference]: Finished difference Result 65 states and 68 transitions. [2020-12-23 07:14:13,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 07:14:13,239 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 37 [2020-12-23 07:14:13,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:14:13,240 INFO L225 Difference]: With dead ends: 65 [2020-12-23 07:14:13,240 INFO L226 Difference]: Without dead ends: 59 [2020-12-23 07:14:13,241 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=430, Invalid=1130, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 07:14:13,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-12-23 07:14:13,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 57. [2020-12-23 07:14:13,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-23 07:14:13,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2020-12-23 07:14:13,249 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 37 [2020-12-23 07:14:13,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:14:13,249 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2020-12-23 07:14:13,249 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-23 07:14:13,249 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2020-12-23 07:14:13,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-23 07:14:13,250 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:14:13,250 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:14:13,450 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-23 07:14:13,450 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:14:13,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:14:13,451 INFO L82 PathProgramCache]: Analyzing trace with hash 2138696961, now seen corresponding path program 9 times [2020-12-23 07:14:13,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:14:13,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624559542] [2020-12-23 07:14:13,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:14:13,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:14:13,915 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:14:13,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624559542] [2020-12-23 07:14:13,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261346685] [2020-12-23 07:14:13,916 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 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 [2020-12-23 07:14:13,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-12-23 07:14:13,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:14:13,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 07:14:13,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:14:13,983 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:14:14,455 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 07:14:14,471 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:14:14,472 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:14:14,474 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 07:14:14,486 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 07:14:14,756 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:14:14,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:14:14,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 36 [2020-12-23 07:14:14,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778245799] [2020-12-23 07:14:14,757 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-23 07:14:14,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:14:14,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-23 07:14:14,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=1029, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 07:14:14,758 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand 36 states. [2020-12-23 07:14:16,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:14:16,721 INFO L93 Difference]: Finished difference Result 113 states and 118 transitions. [2020-12-23 07:14:16,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-23 07:14:16,725 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 39 [2020-12-23 07:14:16,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:14:16,726 INFO L225 Difference]: With dead ends: 113 [2020-12-23 07:14:16,726 INFO L226 Difference]: Without dead ends: 88 [2020-12-23 07:14:16,727 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 739 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=483, Invalid=1967, Unknown=0, NotChecked=0, Total=2450 [2020-12-23 07:14:16,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-12-23 07:14:16,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 60. [2020-12-23 07:14:16,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-12-23 07:14:16,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2020-12-23 07:14:16,736 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 39 [2020-12-23 07:14:16,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:14:16,736 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2020-12-23 07:14:16,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-23 07:14:16,736 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2020-12-23 07:14:16,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-23 07:14:16,737 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:14:16,737 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:14:16,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-23 07:14:16,943 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:14:16,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:14:16,944 INFO L82 PathProgramCache]: Analyzing trace with hash -1939262659, now seen corresponding path program 10 times [2020-12-23 07:14:16,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:14:16,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328974009] [2020-12-23 07:14:16,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:14:16,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:14:17,438 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:14:17,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328974009] [2020-12-23 07:14:17,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554111561] [2020-12-23 07:14:17,438 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 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 [2020-12-23 07:14:17,484 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:14:17,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:14:17,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 07:14:17,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:14:17,489 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:14:17,867 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:14:17,897 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:14:17,899 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 07:14:18,229 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:14:18,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:14:18,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 36 [2020-12-23 07:14:18,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796075948] [2020-12-23 07:14:18,230 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-23 07:14:18,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:14:18,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-23 07:14:18,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=1016, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 07:14:18,232 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand 36 states. [2020-12-23 07:14:19,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:14:19,458 INFO L93 Difference]: Finished difference Result 83 states and 86 transitions. [2020-12-23 07:14:19,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 07:14:19,458 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 39 [2020-12-23 07:14:19,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:14:19,459 INFO L225 Difference]: With dead ends: 83 [2020-12-23 07:14:19,459 INFO L226 Difference]: Without dead ends: 77 [2020-12-23 07:14:19,460 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 669 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=587, Invalid=1669, Unknown=0, NotChecked=0, Total=2256 [2020-12-23 07:14:19,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-12-23 07:14:19,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 62. [2020-12-23 07:14:19,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-12-23 07:14:19,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2020-12-23 07:14:19,469 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 39 [2020-12-23 07:14:19,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:14:19,469 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2020-12-23 07:14:19,470 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-23 07:14:19,470 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2020-12-23 07:14:19,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-23 07:14:19,470 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:14:19,470 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:14:19,670 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-23 07:14:19,671 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:14:19,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:14:19,672 INFO L82 PathProgramCache]: Analyzing trace with hash -1861511265, now seen corresponding path program 11 times [2020-12-23 07:14:19,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:14:19,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517884761] [2020-12-23 07:14:19,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:14:19,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:14:20,137 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 38 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:14:20,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517884761] [2020-12-23 07:14:20,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275425189] [2020-12-23 07:14:20,138 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 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 [2020-12-23 07:14:20,194 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-12-23 07:14:20,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:14:20,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 07:14:20,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:14:20,202 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:14:20,624 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:14:20,643 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:14:20,644 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:14:20,646 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 07:14:20,657 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 07:14:20,908 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:14:20,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:14:20,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 35 [2020-12-23 07:14:20,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263497354] [2020-12-23 07:14:20,909 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-23 07:14:20,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:14:20,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-23 07:14:20,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=962, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 07:14:20,910 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand 35 states. [2020-12-23 07:14:22,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:14:22,021 INFO L93 Difference]: Finished difference Result 87 states and 91 transitions. [2020-12-23 07:14:22,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 07:14:22,022 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 41 [2020-12-23 07:14:22,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:14:22,023 INFO L225 Difference]: With dead ends: 87 [2020-12-23 07:14:22,023 INFO L226 Difference]: Without dead ends: 62 [2020-12-23 07:14:22,024 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 655 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=399, Invalid=1581, Unknown=0, NotChecked=0, Total=1980 [2020-12-23 07:14:22,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-23 07:14:22,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2020-12-23 07:14:22,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-12-23 07:14:22,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2020-12-23 07:14:22,035 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 41 [2020-12-23 07:14:22,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:14:22,035 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2020-12-23 07:14:22,035 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-23 07:14:22,035 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2020-12-23 07:14:22,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-23 07:14:22,035 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:14:22,036 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:14:22,236 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:14:22,236 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:14:22,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:14:22,237 INFO L82 PathProgramCache]: Analyzing trace with hash 1603583359, now seen corresponding path program 10 times [2020-12-23 07:14:22,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:14:22,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316881862] [2020-12-23 07:14:22,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:14:22,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:14:22,767 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 25 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:14:22,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316881862] [2020-12-23 07:14:22,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308827506] [2020-12-23 07:14:22,768 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 [2020-12-23 07:14:22,815 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:14:22,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:14:22,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 07:14:22,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:14:22,822 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:14:23,178 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:14:23,210 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:14:23,213 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 07:14:23,496 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:14:23,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:14:23,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 35 [2020-12-23 07:14:23,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334174908] [2020-12-23 07:14:23,497 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-23 07:14:23,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:14:23,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-23 07:14:23,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=950, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 07:14:23,498 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand 35 states. [2020-12-23 07:14:24,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:14:24,588 INFO L93 Difference]: Finished difference Result 71 states and 74 transitions. [2020-12-23 07:14:24,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 07:14:24,588 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 41 [2020-12-23 07:14:24,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:14:24,589 INFO L225 Difference]: With dead ends: 71 [2020-12-23 07:14:24,589 INFO L226 Difference]: Without dead ends: 65 [2020-12-23 07:14:24,590 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=541, Invalid=1439, Unknown=0, NotChecked=0, Total=1980 [2020-12-23 07:14:24,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-12-23 07:14:24,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 63. [2020-12-23 07:14:24,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-23 07:14:24,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2020-12-23 07:14:24,599 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 41 [2020-12-23 07:14:24,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:14:24,599 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2020-12-23 07:14:24,600 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-23 07:14:24,600 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2020-12-23 07:14:24,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-23 07:14:24,600 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:14:24,600 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:14:24,804 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-23 07:14:24,804 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:14:24,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:14:24,805 INFO L82 PathProgramCache]: Analyzing trace with hash -573746719, now seen corresponding path program 11 times [2020-12-23 07:14:24,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:14:24,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257858706] [2020-12-23 07:14:24,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:14:24,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:14:25,385 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:14:25,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257858706] [2020-12-23 07:14:25,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673990453] [2020-12-23 07:14:25,385 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 [2020-12-23 07:14:25,436 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-12-23 07:14:25,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:14:25,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-23 07:14:25,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:14:25,441 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:14:26,020 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 07:14:26,036 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:14:26,037 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:14:26,039 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 07:14:26,055 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 07:14:26,373 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 49 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:14:26,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:14:26,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 40 [2020-12-23 07:14:26,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677118364] [2020-12-23 07:14:26,374 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-23 07:14:26,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:14:26,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-23 07:14:26,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=1275, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 07:14:26,375 INFO L87 Difference]: Start difference. First operand 63 states and 66 transitions. Second operand 40 states. [2020-12-23 07:14:28,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:14:28,480 INFO L93 Difference]: Finished difference Result 123 states and 128 transitions. [2020-12-23 07:14:28,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-23 07:14:28,481 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 43 [2020-12-23 07:14:28,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:14:28,481 INFO L225 Difference]: With dead ends: 123 [2020-12-23 07:14:28,481 INFO L226 Difference]: Without dead ends: 96 [2020-12-23 07:14:28,483 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 922 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=576, Invalid=2394, Unknown=0, NotChecked=0, Total=2970 [2020-12-23 07:14:28,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-12-23 07:14:28,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 66. [2020-12-23 07:14:28,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-23 07:14:28,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2020-12-23 07:14:28,493 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 43 [2020-12-23 07:14:28,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:14:28,493 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2020-12-23 07:14:28,493 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-23 07:14:28,493 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2020-12-23 07:14:28,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-23 07:14:28,493 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:14:28,493 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:14:28,694 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-23 07:14:28,694 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:14:28,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:14:28,695 INFO L82 PathProgramCache]: Analyzing trace with hash -709607267, now seen corresponding path program 12 times [2020-12-23 07:14:28,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:14:28,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545667833] [2020-12-23 07:14:28,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:14:28,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:14:29,345 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:14:29,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545667833] [2020-12-23 07:14:29,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687894060] [2020-12-23 07:14:29,345 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 [2020-12-23 07:14:29,398 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-12-23 07:14:29,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:14:29,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-23 07:14:29,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:14:29,404 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:14:29,884 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:14:29,912 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:14:29,914 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 07:14:30,303 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 49 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:14:30,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:14:30,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 40 [2020-12-23 07:14:30,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757969732] [2020-12-23 07:14:30,304 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-23 07:14:30,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:14:30,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-23 07:14:30,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=1260, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 07:14:30,305 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand 40 states. [2020-12-23 07:14:31,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:14:31,693 INFO L93 Difference]: Finished difference Result 89 states and 92 transitions. [2020-12-23 07:14:31,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 07:14:31,694 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 43 [2020-12-23 07:14:31,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:14:31,694 INFO L225 Difference]: With dead ends: 89 [2020-12-23 07:14:31,694 INFO L226 Difference]: Without dead ends: 83 [2020-12-23 07:14:31,696 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 844 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=714, Invalid=2042, Unknown=0, NotChecked=0, Total=2756 [2020-12-23 07:14:31,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-12-23 07:14:31,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 68. [2020-12-23 07:14:31,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-12-23 07:14:31,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2020-12-23 07:14:31,708 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 43 [2020-12-23 07:14:31,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:14:31,708 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2020-12-23 07:14:31,708 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-23 07:14:31,708 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2020-12-23 07:14:31,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-23 07:14:31,709 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:14:31,709 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:14:31,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:14:31,924 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:14:31,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:14:31,924 INFO L82 PathProgramCache]: Analyzing trace with hash -1278685953, now seen corresponding path program 13 times [2020-12-23 07:14:31,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:14:31,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915846382] [2020-12-23 07:14:31,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:14:31,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:14:32,496 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 51 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:14:32,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915846382] [2020-12-23 07:14:32,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735698304] [2020-12-23 07:14:32,496 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 [2020-12-23 07:14:32,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:14:32,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-23 07:14:32,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:14:32,550 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:14:33,069 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:14:33,086 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:14:33,088 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:14:33,095 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 07:14:33,108 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 07:14:33,412 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:14:33,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:14:33,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 39 [2020-12-23 07:14:33,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266585364] [2020-12-23 07:14:33,412 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-23 07:14:33,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:14:33,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-23 07:14:33,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=1200, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 07:14:33,414 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand 39 states. [2020-12-23 07:14:34,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:14:34,882 INFO L93 Difference]: Finished difference Result 95 states and 99 transitions. [2020-12-23 07:14:34,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 07:14:34,883 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 45 [2020-12-23 07:14:34,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:14:34,883 INFO L225 Difference]: With dead ends: 95 [2020-12-23 07:14:34,884 INFO L226 Difference]: Without dead ends: 68 [2020-12-23 07:14:34,885 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 828 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=486, Invalid=1964, Unknown=0, NotChecked=0, Total=2450 [2020-12-23 07:14:34,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-12-23 07:14:34,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2020-12-23 07:14:34,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-12-23 07:14:34,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 70 transitions. [2020-12-23 07:14:34,895 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 70 transitions. Word has length 45 [2020-12-23 07:14:34,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:14:34,895 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 70 transitions. [2020-12-23 07:14:34,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-23 07:14:34,895 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 70 transitions. [2020-12-23 07:14:34,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-23 07:14:34,896 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:14:34,896 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:14:35,097 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:14:35,098 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:14:35,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:14:35,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1695567009, now seen corresponding path program 12 times [2020-12-23 07:14:35,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:14:35,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024663911] [2020-12-23 07:14:35,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:14:35,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:14:35,790 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 36 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:14:35,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024663911] [2020-12-23 07:14:35,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565475140] [2020-12-23 07:14:35,791 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 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 [2020-12-23 07:14:35,846 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-12-23 07:14:35,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:14:35,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-23 07:14:35,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:14:35,851 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:14:36,318 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:14:36,356 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:14:36,359 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 07:14:36,713 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:14:36,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:14:36,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 39 [2020-12-23 07:14:36,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934590653] [2020-12-23 07:14:36,714 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-23 07:14:36,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:14:36,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-23 07:14:36,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=296, Invalid=1186, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 07:14:36,715 INFO L87 Difference]: Start difference. First operand 67 states and 70 transitions. Second operand 39 states. [2020-12-23 07:14:37,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:14:37,977 INFO L93 Difference]: Finished difference Result 77 states and 80 transitions. [2020-12-23 07:14:37,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 07:14:37,978 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 45 [2020-12-23 07:14:37,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:14:37,978 INFO L225 Difference]: With dead ends: 77 [2020-12-23 07:14:37,978 INFO L226 Difference]: Without dead ends: 71 [2020-12-23 07:14:37,980 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 788 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=665, Invalid=1785, Unknown=0, NotChecked=0, Total=2450 [2020-12-23 07:14:37,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-12-23 07:14:37,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69. [2020-12-23 07:14:37,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-12-23 07:14:37,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 72 transitions. [2020-12-23 07:14:37,993 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 72 transitions. Word has length 45 [2020-12-23 07:14:37,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:14:37,993 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 72 transitions. [2020-12-23 07:14:37,993 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-23 07:14:37,993 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 72 transitions. [2020-12-23 07:14:37,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-23 07:14:37,993 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:14:37,994 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:14:38,206 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-12-23 07:14:38,207 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:14:38,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:14:38,207 INFO L82 PathProgramCache]: Analyzing trace with hash -1371385919, now seen corresponding path program 13 times [2020-12-23 07:14:38,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:14:38,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156598115] [2020-12-23 07:14:38,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:14:38,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:14:38,889 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:14:38,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156598115] [2020-12-23 07:14:38,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865700661] [2020-12-23 07:14:38,889 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 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 [2020-12-23 07:14:38,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:14:38,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-23 07:14:38,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:14:38,948 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:14:39,631 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 07:14:39,647 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:14:39,648 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:14:39,650 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 07:14:39,655 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 07:14:40,053 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 64 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:14:40,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:14:40,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 44 [2020-12-23 07:14:40,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369160985] [2020-12-23 07:14:40,053 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-12-23 07:14:40,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:14:40,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-12-23 07:14:40,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=345, Invalid=1547, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 07:14:40,055 INFO L87 Difference]: Start difference. First operand 69 states and 72 transitions. Second operand 44 states. [2020-12-23 07:14:42,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:14:42,820 INFO L93 Difference]: Finished difference Result 133 states and 138 transitions. [2020-12-23 07:14:42,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-23 07:14:42,821 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 47 [2020-12-23 07:14:42,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:14:42,822 INFO L225 Difference]: With dead ends: 133 [2020-12-23 07:14:42,822 INFO L226 Difference]: Without dead ends: 104 [2020-12-23 07:14:42,823 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1125 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=678, Invalid=2862, Unknown=0, NotChecked=0, Total=3540 [2020-12-23 07:14:42,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-12-23 07:14:42,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 72. [2020-12-23 07:14:42,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-12-23 07:14:42,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2020-12-23 07:14:42,838 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 47 [2020-12-23 07:14:42,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:14:42,838 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2020-12-23 07:14:42,838 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-12-23 07:14:42,838 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2020-12-23 07:14:42,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-23 07:14:42,839 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:14:42,839 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:14:43,053 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:14:43,054 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:14:43,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:14:43,054 INFO L82 PathProgramCache]: Analyzing trace with hash -1311193347, now seen corresponding path program 14 times [2020-12-23 07:14:43,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:14:43,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346554701] [2020-12-23 07:14:43,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:14:43,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:14:43,835 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:14:43,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346554701] [2020-12-23 07:14:43,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995041266] [2020-12-23 07:14:43,835 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 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 [2020-12-23 07:14:43,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:14:43,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:14:43,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-23 07:14:43,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:14:43,892 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:14:44,454 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:14:44,486 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:14:44,489 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 07:14:44,962 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 64 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:14:44,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:14:44,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 44 [2020-12-23 07:14:44,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668773253] [2020-12-23 07:14:44,963 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-12-23 07:14:44,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:14:44,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-12-23 07:14:44,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=1530, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 07:14:44,964 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand 44 states. [2020-12-23 07:14:46,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:14:46,618 INFO L93 Difference]: Finished difference Result 95 states and 98 transitions. [2020-12-23 07:14:46,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 07:14:46,618 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 47 [2020-12-23 07:14:46,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:14:46,619 INFO L225 Difference]: With dead ends: 95 [2020-12-23 07:14:46,619 INFO L226 Difference]: Without dead ends: 89 [2020-12-23 07:14:46,620 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1039 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=854, Invalid=2452, Unknown=0, NotChecked=0, Total=3306 [2020-12-23 07:14:46,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-12-23 07:14:46,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 74. [2020-12-23 07:14:46,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-12-23 07:14:46,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions. [2020-12-23 07:14:46,632 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 47 [2020-12-23 07:14:46,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:14:46,633 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 78 transitions. [2020-12-23 07:14:46,633 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-12-23 07:14:46,633 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 78 transitions. [2020-12-23 07:14:46,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-23 07:14:46,633 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:14:46,633 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:14:46,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-12-23 07:14:46,834 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:14:46,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:14:46,835 INFO L82 PathProgramCache]: Analyzing trace with hash 417676127, now seen corresponding path program 15 times [2020-12-23 07:14:46,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:14:46,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399462702] [2020-12-23 07:14:46,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:14:46,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:14:47,535 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 66 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:14:47,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399462702] [2020-12-23 07:14:47,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888379781] [2020-12-23 07:14:47,536 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 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 [2020-12-23 07:14:47,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-23 07:14:47,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:14:47,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-23 07:14:47,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:14:47,598 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:14:48,227 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:14:48,250 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:14:48,251 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:14:48,253 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 07:14:48,261 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 07:14:48,644 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:14:48,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:14:48,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 43 [2020-12-23 07:14:48,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366533700] [2020-12-23 07:14:48,645 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-23 07:14:48,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:14:48,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-23 07:14:48,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=342, Invalid=1464, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 07:14:48,647 INFO L87 Difference]: Start difference. First operand 74 states and 78 transitions. Second operand 43 states. [2020-12-23 07:14:50,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:14:50,399 INFO L93 Difference]: Finished difference Result 103 states and 107 transitions. [2020-12-23 07:14:50,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 07:14:50,401 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 49 [2020-12-23 07:14:50,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:14:50,401 INFO L225 Difference]: With dead ends: 103 [2020-12-23 07:14:50,401 INFO L226 Difference]: Without dead ends: 74 [2020-12-23 07:14:50,402 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1021 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=582, Invalid=2388, Unknown=0, NotChecked=0, Total=2970 [2020-12-23 07:14:50,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-12-23 07:14:50,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2020-12-23 07:14:50,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-12-23 07:14:50,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 76 transitions. [2020-12-23 07:14:50,414 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 76 transitions. Word has length 49 [2020-12-23 07:14:50,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:14:50,414 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 76 transitions. [2020-12-23 07:14:50,414 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-23 07:14:50,414 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 76 transitions. [2020-12-23 07:14:50,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-23 07:14:50,415 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:14:50,415 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:14:50,628 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:14:50,629 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:14:50,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:14:50,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1748746815, now seen corresponding path program 14 times [2020-12-23 07:14:50,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:14:50,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190111404] [2020-12-23 07:14:50,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:14:50,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:14:51,438 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 49 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:14:51,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190111404] [2020-12-23 07:14:51,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986702003] [2020-12-23 07:14:51,440 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 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 [2020-12-23 07:14:51,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:14:51,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:14:51,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-23 07:14:51,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:14:51,492 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:14:52,059 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:14:52,097 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:14:52,099 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 07:14:52,539 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:14:52,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:14:52,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 43 [2020-12-23 07:14:52,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358091925] [2020-12-23 07:14:52,540 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-23 07:14:52,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:14:52,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-23 07:14:52,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=1448, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 07:14:52,542 INFO L87 Difference]: Start difference. First operand 73 states and 76 transitions. Second operand 43 states. [2020-12-23 07:14:54,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:14:54,056 INFO L93 Difference]: Finished difference Result 83 states and 86 transitions. [2020-12-23 07:14:54,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 07:14:54,057 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 49 [2020-12-23 07:14:54,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:14:54,058 INFO L225 Difference]: With dead ends: 83 [2020-12-23 07:14:54,058 INFO L226 Difference]: Without dead ends: 77 [2020-12-23 07:14:54,058 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 976 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=802, Invalid=2168, Unknown=0, NotChecked=0, Total=2970 [2020-12-23 07:14:54,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-12-23 07:14:54,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2020-12-23 07:14:54,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-12-23 07:14:54,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 78 transitions. [2020-12-23 07:14:54,071 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 78 transitions. Word has length 49 [2020-12-23 07:14:54,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:14:54,071 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 78 transitions. [2020-12-23 07:14:54,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-23 07:14:54,071 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 78 transitions. [2020-12-23 07:14:54,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-23 07:14:54,072 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:14:54,072 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:14:54,272 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-12-23 07:14:54,273 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:14:54,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:14:54,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1489381025, now seen corresponding path program 15 times [2020-12-23 07:14:54,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:14:54,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140144945] [2020-12-23 07:14:54,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:14:54,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:14:55,078 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 64 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:14:55,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140144945] [2020-12-23 07:14:55,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476486285] [2020-12-23 07:14:55,078 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 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 [2020-12-23 07:14:55,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-23 07:14:55,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:14:55,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-23 07:14:55,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:14:55,144 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:14:55,979 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 07:14:55,996 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:14:55,997 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:14:55,999 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 07:14:56,004 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 07:14:56,493 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 81 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:14:56,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:14:56,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 48 [2020-12-23 07:14:56,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188890479] [2020-12-23 07:14:56,494 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-12-23 07:14:56,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:14:56,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-12-23 07:14:56,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=1845, Unknown=0, NotChecked=0, Total=2256 [2020-12-23 07:14:56,496 INFO L87 Difference]: Start difference. First operand 75 states and 78 transitions. Second operand 48 states. [2020-12-23 07:14:57,459 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-23 07:14:57,680 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-23 07:14:57,896 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-23 07:14:58,102 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-23 07:14:58,308 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-23 07:14:58,522 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-23 07:14:58,730 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-23 07:14:58,943 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-23 07:14:59,157 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-23 07:14:59,376 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 30 [2020-12-23 07:14:59,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:14:59,763 INFO L93 Difference]: Finished difference Result 143 states and 148 transitions. [2020-12-23 07:14:59,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-23 07:14:59,764 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 51 [2020-12-23 07:14:59,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:14:59,765 INFO L225 Difference]: With dead ends: 143 [2020-12-23 07:14:59,765 INFO L226 Difference]: Without dead ends: 112 [2020-12-23 07:14:59,765 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1348 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=789, Invalid=3371, Unknown=0, NotChecked=0, Total=4160 [2020-12-23 07:14:59,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-12-23 07:14:59,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 78. [2020-12-23 07:14:59,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-12-23 07:14:59,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2020-12-23 07:14:59,777 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 51 [2020-12-23 07:14:59,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:14:59,777 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2020-12-23 07:14:59,777 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-12-23 07:14:59,777 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2020-12-23 07:14:59,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-23 07:14:59,778 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:14:59,778 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:14:59,978 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-23 07:14:59,979 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:14:59,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:14:59,979 INFO L82 PathProgramCache]: Analyzing trace with hash 978060893, now seen corresponding path program 16 times [2020-12-23 07:14:59,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:14:59,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826096802] [2020-12-23 07:14:59,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:14:59,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:15:00,900 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 64 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:15:00,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826096802] [2020-12-23 07:15:00,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919402717] [2020-12-23 07:15:00,901 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 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 [2020-12-23 07:15:00,950 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:15:00,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:15:00,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-23 07:15:00,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:15:00,956 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:15:01,646 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:15:01,685 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:15:01,688 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 07:15:02,258 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 81 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:15:02,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:15:02,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 48 [2020-12-23 07:15:02,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425464367] [2020-12-23 07:15:02,259 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-12-23 07:15:02,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:15:02,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-12-23 07:15:02,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=430, Invalid=1826, Unknown=0, NotChecked=0, Total=2256 [2020-12-23 07:15:02,260 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand 48 states. [2020-12-23 07:15:04,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:15:04,034 INFO L93 Difference]: Finished difference Result 101 states and 104 transitions. [2020-12-23 07:15:04,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-23 07:15:04,034 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 51 [2020-12-23 07:15:04,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:15:04,035 INFO L225 Difference]: With dead ends: 101 [2020-12-23 07:15:04,035 INFO L226 Difference]: Without dead ends: 95 [2020-12-23 07:15:04,035 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1254 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1007, Invalid=2899, Unknown=0, NotChecked=0, Total=3906 [2020-12-23 07:15:04,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-12-23 07:15:04,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 80. [2020-12-23 07:15:04,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-12-23 07:15:04,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 84 transitions. [2020-12-23 07:15:04,052 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 84 transitions. Word has length 51 [2020-12-23 07:15:04,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:15:04,052 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 84 transitions. [2020-12-23 07:15:04,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-12-23 07:15:04,053 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 84 transitions. [2020-12-23 07:15:04,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-23 07:15:04,053 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:15:04,053 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:15:04,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-23 07:15:04,254 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:15:04,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:15:04,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1367745215, now seen corresponding path program 17 times [2020-12-23 07:15:04,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:15:04,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927970639] [2020-12-23 07:15:04,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:15:04,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:15:05,049 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 83 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:15:05,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927970639] [2020-12-23 07:15:05,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526500986] [2020-12-23 07:15:05,050 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 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 [2020-12-23 07:15:05,106 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-12-23 07:15:05,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:15:05,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-23 07:15:05,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:15:05,115 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:15:05,864 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:15:05,884 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:15:05,885 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:15:05,886 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 07:15:05,893 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 07:15:06,354 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 100 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:15:06,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:15:06,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 47 [2020-12-23 07:15:06,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042441717] [2020-12-23 07:15:06,355 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-12-23 07:15:06,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:15:06,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-12-23 07:15:06,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=1754, Unknown=0, NotChecked=0, Total=2162 [2020-12-23 07:15:06,356 INFO L87 Difference]: Start difference. First operand 80 states and 84 transitions. Second operand 47 states. [2020-12-23 07:15:08,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:15:08,595 INFO L93 Difference]: Finished difference Result 111 states and 115 transitions. [2020-12-23 07:15:08,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 07:15:08,597 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 53 [2020-12-23 07:15:08,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:15:08,598 INFO L225 Difference]: With dead ends: 111 [2020-12-23 07:15:08,598 INFO L226 Difference]: Without dead ends: 80 [2020-12-23 07:15:08,599 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1234 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=687, Invalid=2853, Unknown=0, NotChecked=0, Total=3540 [2020-12-23 07:15:08,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-12-23 07:15:08,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2020-12-23 07:15:08,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-12-23 07:15:08,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 82 transitions. [2020-12-23 07:15:08,615 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 82 transitions. Word has length 53 [2020-12-23 07:15:08,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:15:08,615 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 82 transitions. [2020-12-23 07:15:08,615 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-12-23 07:15:08,615 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 82 transitions. [2020-12-23 07:15:08,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-23 07:15:08,616 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:15:08,616 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:15:08,816 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-23 07:15:08,817 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:15:08,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:15:08,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1146738145, now seen corresponding path program 16 times [2020-12-23 07:15:08,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:15:08,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164565763] [2020-12-23 07:15:08,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:15:08,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:15:09,759 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 64 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:15:09,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164565763] [2020-12-23 07:15:09,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309864857] [2020-12-23 07:15:09,760 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 [2020-12-23 07:15:09,813 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:15:09,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:15:09,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-23 07:15:09,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:15:09,819 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:15:10,518 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:15:10,561 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:15:10,563 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 07:15:11,086 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:15:11,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:15:11,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 47 [2020-12-23 07:15:11,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824144440] [2020-12-23 07:15:11,087 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-12-23 07:15:11,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:15:11,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-12-23 07:15:11,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=426, Invalid=1736, Unknown=0, NotChecked=0, Total=2162 [2020-12-23 07:15:11,088 INFO L87 Difference]: Start difference. First operand 79 states and 82 transitions. Second operand 47 states. [2020-12-23 07:15:12,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:15:12,880 INFO L93 Difference]: Finished difference Result 89 states and 92 transitions. [2020-12-23 07:15:12,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 07:15:12,881 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 53 [2020-12-23 07:15:12,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:15:12,882 INFO L225 Difference]: With dead ends: 89 [2020-12-23 07:15:12,882 INFO L226 Difference]: Without dead ends: 83 [2020-12-23 07:15:12,882 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1184 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=952, Invalid=2588, Unknown=0, NotChecked=0, Total=3540 [2020-12-23 07:15:12,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-12-23 07:15:12,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 81. [2020-12-23 07:15:12,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-12-23 07:15:12,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 84 transitions. [2020-12-23 07:15:12,903 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 84 transitions. Word has length 53 [2020-12-23 07:15:12,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:15:12,903 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 84 transitions. [2020-12-23 07:15:12,903 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-12-23 07:15:12,903 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 84 transitions. [2020-12-23 07:15:12,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-23 07:15:12,904 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:15:12,904 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:15:13,117 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-23 07:15:13,118 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:15:13,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:15:13,118 INFO L82 PathProgramCache]: Analyzing trace with hash 2067142273, now seen corresponding path program 17 times [2020-12-23 07:15:13,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:15:13,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493663321] [2020-12-23 07:15:13,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:15:13,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:15:14,068 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 81 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:15:14,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493663321] [2020-12-23 07:15:14,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489208345] [2020-12-23 07:15:14,068 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 [2020-12-23 07:15:14,125 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-12-23 07:15:14,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:15:14,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-23 07:15:14,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:15:14,130 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:15:15,139 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 07:15:15,156 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:15:15,157 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:15:15,158 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 07:15:15,166 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 07:15:15,763 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 100 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:15:15,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:15:15,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 52 [2020-12-23 07:15:15,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820293942] [2020-12-23 07:15:15,764 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-12-23 07:15:15,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:15:15,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-12-23 07:15:15,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=483, Invalid=2169, Unknown=0, NotChecked=0, Total=2652 [2020-12-23 07:15:15,765 INFO L87 Difference]: Start difference. First operand 81 states and 84 transitions. Second operand 52 states. [2020-12-23 07:15:16,557 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 28 [2020-12-23 07:15:16,754 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-23 07:15:16,977 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-23 07:15:17,174 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-23 07:15:17,364 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-23 07:15:17,559 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-23 07:15:17,759 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-23 07:15:17,962 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-23 07:15:18,165 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-23 07:15:18,369 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-23 07:15:18,576 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-23 07:15:18,778 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 30 [2020-12-23 07:15:19,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:15:19,157 INFO L93 Difference]: Finished difference Result 153 states and 158 transitions. [2020-12-23 07:15:19,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-23 07:15:19,159 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 55 [2020-12-23 07:15:19,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:15:19,159 INFO L225 Difference]: With dead ends: 153 [2020-12-23 07:15:19,159 INFO L226 Difference]: Without dead ends: 120 [2020-12-23 07:15:19,160 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1591 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=909, Invalid=3921, Unknown=0, NotChecked=0, Total=4830 [2020-12-23 07:15:19,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-12-23 07:15:19,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 84. [2020-12-23 07:15:19,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-12-23 07:15:19,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 88 transitions. [2020-12-23 07:15:19,183 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 88 transitions. Word has length 55 [2020-12-23 07:15:19,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:15:19,183 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 88 transitions. [2020-12-23 07:15:19,183 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-12-23 07:15:19,183 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 88 transitions. [2020-12-23 07:15:19,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-23 07:15:19,184 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:15:19,184 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:15:19,398 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-12-23 07:15:19,399 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:15:19,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:15:19,399 INFO L82 PathProgramCache]: Analyzing trace with hash 2087927485, now seen corresponding path program 18 times [2020-12-23 07:15:19,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:15:19,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570154036] [2020-12-23 07:15:19,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:15:19,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:15:20,532 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 81 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:15:20,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570154036] [2020-12-23 07:15:20,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399666563] [2020-12-23 07:15:20,532 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 [2020-12-23 07:15:20,592 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-12-23 07:15:20,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:15:20,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-23 07:15:20,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:15:20,599 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:15:21,438 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:15:21,475 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:15:21,477 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 07:15:22,167 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 100 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:15:22,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:15:22,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 52 [2020-12-23 07:15:22,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385647244] [2020-12-23 07:15:22,167 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-12-23 07:15:22,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:15:22,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-12-23 07:15:22,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=504, Invalid=2148, Unknown=0, NotChecked=0, Total=2652 [2020-12-23 07:15:22,169 INFO L87 Difference]: Start difference. First operand 84 states and 88 transitions. Second operand 52 states. [2020-12-23 07:15:24,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:15:24,435 INFO L93 Difference]: Finished difference Result 107 states and 110 transitions. [2020-12-23 07:15:24,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-23 07:15:24,435 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 55 [2020-12-23 07:15:24,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:15:24,436 INFO L225 Difference]: With dead ends: 107 [2020-12-23 07:15:24,436 INFO L226 Difference]: Without dead ends: 101 [2020-12-23 07:15:24,437 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1489 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1173, Invalid=3383, Unknown=0, NotChecked=0, Total=4556 [2020-12-23 07:15:24,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-12-23 07:15:24,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 86. [2020-12-23 07:15:24,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-12-23 07:15:24,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 90 transitions. [2020-12-23 07:15:24,460 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 90 transitions. Word has length 55 [2020-12-23 07:15:24,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:15:24,460 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 90 transitions. [2020-12-23 07:15:24,460 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-12-23 07:15:24,460 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 90 transitions. [2020-12-23 07:15:24,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-23 07:15:24,461 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:15:24,461 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:15:24,665 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-12-23 07:15:24,665 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:15:24,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:15:24,666 INFO L82 PathProgramCache]: Analyzing trace with hash -1497316577, now seen corresponding path program 19 times [2020-12-23 07:15:24,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:15:24,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084298175] [2020-12-23 07:15:24,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:15:24,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:15:25,622 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 102 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:15:25,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084298175] [2020-12-23 07:15:25,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020414341] [2020-12-23 07:15:25,622 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 [2020-12-23 07:15:25,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:15:25,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-23 07:15:25,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:15:25,680 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:15:26,631 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:15:26,651 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:15:26,652 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:15:26,654 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 07:15:26,659 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 07:15:27,237 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 121 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:15:27,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:15:27,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 51 [2020-12-23 07:15:27,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467572885] [2020-12-23 07:15:27,239 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-12-23 07:15:27,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:15:27,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-12-23 07:15:27,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=480, Invalid=2070, Unknown=0, NotChecked=0, Total=2550 [2020-12-23 07:15:27,240 INFO L87 Difference]: Start difference. First operand 86 states and 90 transitions. Second operand 51 states. [2020-12-23 07:15:29,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:15:29,989 INFO L93 Difference]: Finished difference Result 119 states and 123 transitions. [2020-12-23 07:15:29,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-23 07:15:29,990 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 57 [2020-12-23 07:15:29,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:15:29,991 INFO L225 Difference]: With dead ends: 119 [2020-12-23 07:15:29,991 INFO L226 Difference]: Without dead ends: 86 [2020-12-23 07:15:29,992 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1467 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=801, Invalid=3359, Unknown=0, NotChecked=0, Total=4160 [2020-12-23 07:15:29,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-12-23 07:15:30,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-12-23 07:15:30,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-12-23 07:15:30,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 88 transitions. [2020-12-23 07:15:30,008 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 88 transitions. Word has length 57 [2020-12-23 07:15:30,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:15:30,009 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 88 transitions. [2020-12-23 07:15:30,009 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-12-23 07:15:30,009 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 88 transitions. [2020-12-23 07:15:30,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-23 07:15:30,009 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:15:30,009 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:15:30,223 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:15:30,224 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:15:30,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:15:30,224 INFO L82 PathProgramCache]: Analyzing trace with hash -1622398209, now seen corresponding path program 18 times [2020-12-23 07:15:30,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:15:30,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658526025] [2020-12-23 07:15:30,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:15:30,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:15:31,420 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 81 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:15:31,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658526025] [2020-12-23 07:15:31,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823516276] [2020-12-23 07:15:31,421 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 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 [2020-12-23 07:15:31,483 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-12-23 07:15:31,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:15:31,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-23 07:15:31,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:15:31,491 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:15:32,363 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:15:32,411 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:15:32,414 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 07:15:33,066 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:15:33,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:15:33,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 51 [2020-12-23 07:15:33,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233143266] [2020-12-23 07:15:33,067 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-12-23 07:15:33,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:15:33,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-12-23 07:15:33,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=500, Invalid=2050, Unknown=0, NotChecked=0, Total=2550 [2020-12-23 07:15:33,070 INFO L87 Difference]: Start difference. First operand 85 states and 88 transitions. Second operand 51 states. [2020-12-23 07:15:35,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:15:35,244 INFO L93 Difference]: Finished difference Result 95 states and 98 transitions. [2020-12-23 07:15:35,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-23 07:15:35,245 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 57 [2020-12-23 07:15:35,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:15:35,246 INFO L225 Difference]: With dead ends: 95 [2020-12-23 07:15:35,246 INFO L226 Difference]: Without dead ends: 89 [2020-12-23 07:15:35,246 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1412 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1115, Invalid=3045, Unknown=0, NotChecked=0, Total=4160 [2020-12-23 07:15:35,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-12-23 07:15:35,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 87. [2020-12-23 07:15:35,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-12-23 07:15:35,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 90 transitions. [2020-12-23 07:15:35,263 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 90 transitions. Word has length 57 [2020-12-23 07:15:35,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:15:35,263 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 90 transitions. [2020-12-23 07:15:35,263 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-12-23 07:15:35,263 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 90 transitions. [2020-12-23 07:15:35,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-23 07:15:35,264 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:15:35,264 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:15:35,464 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-12-23 07:15:35,465 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:15:35,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:15:35,465 INFO L82 PathProgramCache]: Analyzing trace with hash 224354145, now seen corresponding path program 19 times [2020-12-23 07:15:35,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:15:35,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925626616] [2020-12-23 07:15:35,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:15:35,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:15:36,592 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 100 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:15:36,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925626616] [2020-12-23 07:15:36,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821509454] [2020-12-23 07:15:36,593 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 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 [2020-12-23 07:15:36,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:15:36,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-23 07:15:36,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:15:36,653 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:15:37,868 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 07:15:37,887 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:15:37,888 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:15:37,891 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 07:15:37,902 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 07:15:38,638 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 121 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:15:38,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:15:38,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 56 [2020-12-23 07:15:38,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110772247] [2020-12-23 07:15:38,639 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-12-23 07:15:38,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:15:38,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-12-23 07:15:38,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=2519, Unknown=0, NotChecked=0, Total=3080 [2020-12-23 07:15:38,640 INFO L87 Difference]: Start difference. First operand 87 states and 90 transitions. Second operand 56 states. [2020-12-23 07:15:39,343 WARN L197 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 26 [2020-12-23 07:15:39,608 WARN L197 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 28 [2020-12-23 07:15:39,877 WARN L197 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-23 07:15:40,167 WARN L197 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-23 07:15:40,439 WARN L197 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-23 07:15:40,707 WARN L197 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-23 07:15:40,976 WARN L197 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-23 07:15:41,256 WARN L197 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-23 07:15:41,531 WARN L197 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-23 07:15:41,800 WARN L197 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-23 07:15:42,076 WARN L197 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-23 07:15:42,360 WARN L197 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-23 07:15:42,641 WARN L197 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-23 07:15:42,922 WARN L197 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 30 [2020-12-23 07:15:43,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:15:43,341 INFO L93 Difference]: Finished difference Result 163 states and 168 transitions. [2020-12-23 07:15:43,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-23 07:15:43,343 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 59 [2020-12-23 07:15:43,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:15:43,344 INFO L225 Difference]: With dead ends: 163 [2020-12-23 07:15:43,344 INFO L226 Difference]: Without dead ends: 128 [2020-12-23 07:15:43,345 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1854 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=1038, Invalid=4512, Unknown=0, NotChecked=0, Total=5550 [2020-12-23 07:15:43,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-12-23 07:15:43,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 90. [2020-12-23 07:15:43,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-12-23 07:15:43,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 94 transitions. [2020-12-23 07:15:43,366 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 94 transitions. Word has length 59 [2020-12-23 07:15:43,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:15:43,367 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 94 transitions. [2020-12-23 07:15:43,367 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-12-23 07:15:43,367 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 94 transitions. [2020-12-23 07:15:43,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-23 07:15:43,367 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:15:43,367 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:15:43,570 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:15:43,571 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:15:43,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:15:43,571 INFO L82 PathProgramCache]: Analyzing trace with hash 497266717, now seen corresponding path program 20 times [2020-12-23 07:15:43,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:15:43,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001499407] [2020-12-23 07:15:43,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:15:43,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:15:44,967 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 100 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:15:44,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001499407] [2020-12-23 07:15:44,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764506498] [2020-12-23 07:15:44,967 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 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 [2020-12-23 07:15:45,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:15:45,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:15:45,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-23 07:15:45,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:15:45,033 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:15:46,079 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:15:46,121 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:15:46,122 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 07:15:46,967 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 121 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:15:46,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:15:46,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 56 [2020-12-23 07:15:46,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376268223] [2020-12-23 07:15:46,970 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-12-23 07:15:46,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:15:46,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-12-23 07:15:46,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=584, Invalid=2496, Unknown=0, NotChecked=0, Total=3080 [2020-12-23 07:15:46,971 INFO L87 Difference]: Start difference. First operand 90 states and 94 transitions. Second operand 56 states. [2020-12-23 07:15:49,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:15:49,709 INFO L93 Difference]: Finished difference Result 113 states and 116 transitions. [2020-12-23 07:15:49,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-23 07:15:49,709 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 59 [2020-12-23 07:15:49,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:15:49,710 INFO L225 Difference]: With dead ends: 113 [2020-12-23 07:15:49,710 INFO L226 Difference]: Without dead ends: 107 [2020-12-23 07:15:49,710 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1744 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1352, Invalid=3904, Unknown=0, NotChecked=0, Total=5256 [2020-12-23 07:15:49,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-12-23 07:15:49,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 92. [2020-12-23 07:15:49,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-12-23 07:15:49,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 96 transitions. [2020-12-23 07:15:49,729 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 96 transitions. Word has length 59 [2020-12-23 07:15:49,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:15:49,729 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 96 transitions. [2020-12-23 07:15:49,729 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-12-23 07:15:49,729 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 96 transitions. [2020-12-23 07:15:49,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-23 07:15:49,729 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:15:49,730 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:15:49,930 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-12-23 07:15:49,930 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:15:49,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:15:49,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1113957249, now seen corresponding path program 21 times [2020-12-23 07:15:49,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:15:49,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555337118] [2020-12-23 07:15:49,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:15:49,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:15:51,099 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 123 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:15:51,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555337118] [2020-12-23 07:15:51,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280869236] [2020-12-23 07:15:51,099 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 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 [2020-12-23 07:15:51,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-12-23 07:15:51,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:15:51,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-23 07:15:51,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:15:51,177 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:15:52,345 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:15:52,366 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:15:52,367 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:15:52,368 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 07:15:52,373 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 07:15:53,088 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 144 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:15:53,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:15:53,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 55 [2020-12-23 07:15:53,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771733928] [2020-12-23 07:15:53,089 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-12-23 07:15:53,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:15:53,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-12-23 07:15:53,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=558, Invalid=2412, Unknown=0, NotChecked=0, Total=2970 [2020-12-23 07:15:53,090 INFO L87 Difference]: Start difference. First operand 92 states and 96 transitions. Second operand 55 states. [2020-12-23 07:15:55,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:15:55,911 INFO L93 Difference]: Finished difference Result 127 states and 131 transitions. [2020-12-23 07:15:55,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-23 07:15:55,913 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 61 [2020-12-23 07:15:55,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:15:55,914 INFO L225 Difference]: With dead ends: 127 [2020-12-23 07:15:55,914 INFO L226 Difference]: Without dead ends: 92 [2020-12-23 07:15:55,914 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1720 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=924, Invalid=3906, Unknown=0, NotChecked=0, Total=4830 [2020-12-23 07:15:55,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-12-23 07:15:55,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2020-12-23 07:15:55,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-12-23 07:15:55,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 94 transitions. [2020-12-23 07:15:55,940 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 94 transitions. Word has length 61 [2020-12-23 07:15:55,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:15:55,940 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 94 transitions. [2020-12-23 07:15:55,940 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-12-23 07:15:55,940 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 94 transitions. [2020-12-23 07:15:55,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-23 07:15:55,941 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:15:55,941 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:15:56,155 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:15:56,156 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:15:56,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:15:56,156 INFO L82 PathProgramCache]: Analyzing trace with hash 1463485663, now seen corresponding path program 20 times [2020-12-23 07:15:56,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:15:56,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647555137] [2020-12-23 07:15:56,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:15:56,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:15:57,619 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 100 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:15:57,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647555137] [2020-12-23 07:15:57,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576315818] [2020-12-23 07:15:57,619 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 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 [2020-12-23 07:15:57,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:15:57,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:15:57,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-23 07:15:57,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:15:57,691 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:15:58,760 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:15:58,811 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:15:58,813 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 07:15:59,604 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 121 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:15:59,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:15:59,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 55 [2020-12-23 07:15:59,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075597646] [2020-12-23 07:15:59,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-12-23 07:15:59,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:15:59,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-12-23 07:15:59,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=580, Invalid=2390, Unknown=0, NotChecked=0, Total=2970 [2020-12-23 07:15:59,606 INFO L87 Difference]: Start difference. First operand 91 states and 94 transitions. Second operand 55 states. [2020-12-23 07:16:02,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:16:02,116 INFO L93 Difference]: Finished difference Result 101 states and 104 transitions. [2020-12-23 07:16:02,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-23 07:16:02,117 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 61 [2020-12-23 07:16:02,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:16:02,118 INFO L225 Difference]: With dead ends: 101 [2020-12-23 07:16:02,118 INFO L226 Difference]: Without dead ends: 95 [2020-12-23 07:16:02,119 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1660 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1291, Invalid=3539, Unknown=0, NotChecked=0, Total=4830 [2020-12-23 07:16:02,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-12-23 07:16:02,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 93. [2020-12-23 07:16:02,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-12-23 07:16:02,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 96 transitions. [2020-12-23 07:16:02,147 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 96 transitions. Word has length 61 [2020-12-23 07:16:02,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:16:02,147 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 96 transitions. [2020-12-23 07:16:02,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-12-23 07:16:02,147 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 96 transitions. [2020-12-23 07:16:02,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-23 07:16:02,147 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:16:02,148 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:16:02,348 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-12-23 07:16:02,348 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:16:02,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:16:02,349 INFO L82 PathProgramCache]: Analyzing trace with hash -2063646399, now seen corresponding path program 21 times [2020-12-23 07:16:02,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:16:02,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615489556] [2020-12-23 07:16:02,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:16:02,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:16:03,931 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 121 proven. 167 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:16:03,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615489556] [2020-12-23 07:16:03,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434858865] [2020-12-23 07:16:03,931 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 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 [2020-12-23 07:16:04,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-12-23 07:16:04,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:16:04,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-23 07:16:04,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:16:04,014 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:16:05,536 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 07:16:05,556 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:16:05,557 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:16:05,558 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 07:16:05,566 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 07:16:06,476 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 144 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:16:06,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:16:06,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 60 [2020-12-23 07:16:06,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525572093] [2020-12-23 07:16:06,477 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-12-23 07:16:06,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:16:06,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-12-23 07:16:06,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=645, Invalid=2895, Unknown=0, NotChecked=0, Total=3540 [2020-12-23 07:16:06,478 INFO L87 Difference]: Start difference. First operand 93 states and 96 transitions. Second operand 60 states. [2020-12-23 07:16:07,221 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 26 [2020-12-23 07:16:07,455 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 28 [2020-12-23 07:16:07,694 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-23 07:16:07,952 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-23 07:16:08,194 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-23 07:16:08,433 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-23 07:16:08,676 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-23 07:16:08,914 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-23 07:16:09,153 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-23 07:16:09,400 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-23 07:16:09,654 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-23 07:16:09,912 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-23 07:16:10,170 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-23 07:16:10,429 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-23 07:16:10,677 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 30 [2020-12-23 07:16:11,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:16:11,153 INFO L93 Difference]: Finished difference Result 173 states and 178 transitions. [2020-12-23 07:16:11,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-23 07:16:11,154 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 63 [2020-12-23 07:16:11,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:16:11,155 INFO L225 Difference]: With dead ends: 173 [2020-12-23 07:16:11,155 INFO L226 Difference]: Without dead ends: 136 [2020-12-23 07:16:11,156 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2137 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=1176, Invalid=5144, Unknown=0, NotChecked=0, Total=6320 [2020-12-23 07:16:11,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-12-23 07:16:11,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 96. [2020-12-23 07:16:11,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-12-23 07:16:11,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 100 transitions. [2020-12-23 07:16:11,184 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 100 transitions. Word has length 63 [2020-12-23 07:16:11,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:16:11,184 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 100 transitions. [2020-12-23 07:16:11,184 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-12-23 07:16:11,184 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 100 transitions. [2020-12-23 07:16:11,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-23 07:16:11,185 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:16:11,185 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:16:11,398 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-12-23 07:16:11,399 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:16:11,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:16:11,399 INFO L82 PathProgramCache]: Analyzing trace with hash -14509443, now seen corresponding path program 22 times [2020-12-23 07:16:11,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:16:11,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231486183] [2020-12-23 07:16:11,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:16:11,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:16:13,149 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 121 proven. 167 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:16:13,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231486183] [2020-12-23 07:16:13,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856972334] [2020-12-23 07:16:13,149 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 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 [2020-12-23 07:16:13,207 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:16:13,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:16:13,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-23 07:16:13,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:16:13,214 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:16:14,454 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:16:14,508 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:16:14,510 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 07:16:15,680 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 144 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:16:15,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:16:15,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 60 [2020-12-23 07:16:15,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300196253] [2020-12-23 07:16:15,681 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-12-23 07:16:15,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:16:15,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-12-23 07:16:15,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=670, Invalid=2870, Unknown=0, NotChecked=0, Total=3540 [2020-12-23 07:16:15,682 INFO L87 Difference]: Start difference. First operand 96 states and 100 transitions. Second operand 60 states. [2020-12-23 07:16:19,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:16:19,641 INFO L93 Difference]: Finished difference Result 119 states and 122 transitions. [2020-12-23 07:16:19,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-23 07:16:19,641 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 63 [2020-12-23 07:16:19,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:16:19,642 INFO L225 Difference]: With dead ends: 119 [2020-12-23 07:16:19,642 INFO L226 Difference]: Without dead ends: 113 [2020-12-23 07:16:19,643 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2019 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=1544, Invalid=4462, Unknown=0, NotChecked=0, Total=6006 [2020-12-23 07:16:19,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-12-23 07:16:19,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 98. [2020-12-23 07:16:19,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-12-23 07:16:19,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 102 transitions. [2020-12-23 07:16:19,671 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 102 transitions. Word has length 63 [2020-12-23 07:16:19,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:16:19,671 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 102 transitions. [2020-12-23 07:16:19,671 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-12-23 07:16:19,671 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 102 transitions. [2020-12-23 07:16:19,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-23 07:16:19,672 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:16:19,672 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:16:19,872 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-12-23 07:16:19,873 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:16:19,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:16:19,874 INFO L82 PathProgramCache]: Analyzing trace with hash 990392031, now seen corresponding path program 23 times [2020-12-23 07:16:19,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:16:19,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462138280] [2020-12-23 07:16:19,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:16:19,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:16:21,396 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 146 proven. 167 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:16:21,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462138280] [2020-12-23 07:16:21,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952605179] [2020-12-23 07:16:21,397 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 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 [2020-12-23 07:16:21,458 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2020-12-23 07:16:21,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:16:21,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-23 07:16:21,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:16:21,467 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:16:23,111 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:16:23,137 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:16:23,138 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:16:23,139 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 07:16:23,151 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 07:16:24,221 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 169 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:16:24,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:16:24,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 59 [2020-12-23 07:16:24,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639644849] [2020-12-23 07:16:24,222 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-12-23 07:16:24,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:16:24,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-12-23 07:16:24,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=642, Invalid=2780, Unknown=0, NotChecked=0, Total=3422 [2020-12-23 07:16:24,223 INFO L87 Difference]: Start difference. First operand 98 states and 102 transitions. Second operand 59 states. [2020-12-23 07:16:25,462 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2020-12-23 07:16:26,191 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2020-12-23 07:16:26,604 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2020-12-23 07:16:27,027 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2020-12-23 07:16:27,244 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2020-12-23 07:16:27,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:16:27,613 INFO L93 Difference]: Finished difference Result 135 states and 139 transitions. [2020-12-23 07:16:27,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-23 07:16:27,615 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 65 [2020-12-23 07:16:27,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:16:27,617 INFO L225 Difference]: With dead ends: 135 [2020-12-23 07:16:27,617 INFO L226 Difference]: Without dead ends: 98 [2020-12-23 07:16:27,618 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1993 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=1056, Invalid=4494, Unknown=0, NotChecked=0, Total=5550 [2020-12-23 07:16:27,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-12-23 07:16:27,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2020-12-23 07:16:27,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-12-23 07:16:27,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 100 transitions. [2020-12-23 07:16:27,639 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 100 transitions. Word has length 65 [2020-12-23 07:16:27,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:16:27,639 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 100 transitions. [2020-12-23 07:16:27,639 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-12-23 07:16:27,639 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 100 transitions. [2020-12-23 07:16:27,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-23 07:16:27,640 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:16:27,640 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:16:27,849 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2020-12-23 07:16:27,850 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:16:27,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:16:27,851 INFO L82 PathProgramCache]: Analyzing trace with hash -2056259649, now seen corresponding path program 22 times [2020-12-23 07:16:27,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:16:27,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468211644] [2020-12-23 07:16:27,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:16:27,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:16:29,759 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 121 proven. 192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:16:29,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468211644] [2020-12-23 07:16:29,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761966221] [2020-12-23 07:16:29,759 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 [2020-12-23 07:16:29,817 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:16:29,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:16:29,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-23 07:16:29,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:16:29,826 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:16:31,220 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:16:31,271 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:16:31,274 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 07:16:32,317 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 144 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:16:32,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:16:32,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 59 [2020-12-23 07:16:32,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447504727] [2020-12-23 07:16:32,318 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-12-23 07:16:32,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:16:32,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-12-23 07:16:32,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=2756, Unknown=0, NotChecked=0, Total=3422 [2020-12-23 07:16:32,318 INFO L87 Difference]: Start difference. First operand 97 states and 100 transitions. Second operand 59 states. [2020-12-23 07:16:35,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:16:35,375 INFO L93 Difference]: Finished difference Result 107 states and 110 transitions. [2020-12-23 07:16:35,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-23 07:16:35,377 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 65 [2020-12-23 07:16:35,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:16:35,378 INFO L225 Difference]: With dead ends: 107 [2020-12-23 07:16:35,378 INFO L226 Difference]: Without dead ends: 101 [2020-12-23 07:16:35,378 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1928 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=1480, Invalid=4070, Unknown=0, NotChecked=0, Total=5550 [2020-12-23 07:16:35,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-12-23 07:16:35,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 99. [2020-12-23 07:16:35,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-12-23 07:16:35,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 102 transitions. [2020-12-23 07:16:35,400 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 102 transitions. Word has length 65 [2020-12-23 07:16:35,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:16:35,400 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 102 transitions. [2020-12-23 07:16:35,400 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-12-23 07:16:35,400 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 102 transitions. [2020-12-23 07:16:35,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-23 07:16:35,401 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:16:35,401 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:16:35,609 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:16:35,609 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:16:35,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:16:35,610 INFO L82 PathProgramCache]: Analyzing trace with hash -104661983, now seen corresponding path program 23 times [2020-12-23 07:16:35,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:16:35,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530196900] [2020-12-23 07:16:35,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:16:35,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:16:37,343 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 144 proven. 194 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:16:37,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530196900] [2020-12-23 07:16:37,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236413309] [2020-12-23 07:16:37,344 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 [2020-12-23 07:16:37,404 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2020-12-23 07:16:37,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:16:37,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-23 07:16:37,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:16:37,417 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:16:39,415 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 07:16:39,437 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:16:39,438 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:16:39,439 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 07:16:39,445 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 07:16:40,605 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 169 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:16:40,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:16:40,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 64 [2020-12-23 07:16:40,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050875738] [2020-12-23 07:16:40,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-12-23 07:16:40,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:16:40,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-12-23 07:16:40,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=735, Invalid=3297, Unknown=0, NotChecked=0, Total=4032 [2020-12-23 07:16:40,606 INFO L87 Difference]: Start difference. First operand 99 states and 102 transitions. Second operand 64 states. [2020-12-23 07:16:41,250 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 20 [2020-12-23 07:16:41,513 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 26 [2020-12-23 07:16:41,821 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 28 [2020-12-23 07:16:42,093 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-23 07:16:42,432 WARN L197 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-23 07:16:42,742 WARN L197 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-23 07:16:43,041 WARN L197 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-23 07:16:43,359 WARN L197 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-23 07:16:43,651 WARN L197 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-23 07:16:43,969 WARN L197 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-23 07:16:44,301 WARN L197 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-23 07:16:44,626 WARN L197 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-23 07:16:44,947 WARN L197 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-23 07:16:45,312 WARN L197 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-23 07:16:45,636 WARN L197 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-23 07:16:45,969 WARN L197 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-23 07:16:46,296 WARN L197 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 30 [2020-12-23 07:16:46,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:16:46,910 INFO L93 Difference]: Finished difference Result 183 states and 188 transitions. [2020-12-23 07:16:46,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-23 07:16:46,914 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 67 [2020-12-23 07:16:46,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:16:46,915 INFO L225 Difference]: With dead ends: 183 [2020-12-23 07:16:46,915 INFO L226 Difference]: Without dead ends: 144 [2020-12-23 07:16:46,916 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2440 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=1323, Invalid=5817, Unknown=0, NotChecked=0, Total=7140 [2020-12-23 07:16:46,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-12-23 07:16:46,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 102. [2020-12-23 07:16:46,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-12-23 07:16:46,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 106 transitions. [2020-12-23 07:16:46,942 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 106 transitions. Word has length 67 [2020-12-23 07:16:46,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:16:46,942 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 106 transitions. [2020-12-23 07:16:46,942 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-12-23 07:16:46,942 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 106 transitions. [2020-12-23 07:16:46,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-23 07:16:46,943 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:16:46,943 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:16:47,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:16:47,144 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:16:47,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:16:47,145 INFO L82 PathProgramCache]: Analyzing trace with hash -500875811, now seen corresponding path program 24 times [2020-12-23 07:16:47,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:16:47,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323261366] [2020-12-23 07:16:47,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:16:47,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:16:49,260 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 144 proven. 194 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:16:49,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323261366] [2020-12-23 07:16:49,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612803960] [2020-12-23 07:16:49,261 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 [2020-12-23 07:16:49,328 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2020-12-23 07:16:49,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:16:49,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-23 07:16:49,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:16:49,337 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:16:50,989 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:16:51,044 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:16:51,045 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 07:16:52,492 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 169 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:16:52,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:16:52,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 64 [2020-12-23 07:16:52,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256086508] [2020-12-23 07:16:52,493 INFO L461 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-12-23 07:16:52,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:16:52,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-12-23 07:16:52,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=762, Invalid=3270, Unknown=0, NotChecked=0, Total=4032 [2020-12-23 07:16:52,494 INFO L87 Difference]: Start difference. First operand 102 states and 106 transitions. Second operand 64 states. [2020-12-23 07:16:56,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:16:56,462 INFO L93 Difference]: Finished difference Result 125 states and 128 transitions. [2020-12-23 07:16:56,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-23 07:16:56,462 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 67 [2020-12-23 07:16:56,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:16:56,463 INFO L225 Difference]: With dead ends: 125 [2020-12-23 07:16:56,463 INFO L226 Difference]: Without dead ends: 119 [2020-12-23 07:16:56,464 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2314 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=1749, Invalid=5057, Unknown=0, NotChecked=0, Total=6806 [2020-12-23 07:16:56,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-12-23 07:16:56,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 104. [2020-12-23 07:16:56,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-12-23 07:16:56,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 108 transitions. [2020-12-23 07:16:56,487 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 108 transitions. Word has length 67 [2020-12-23 07:16:56,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:16:56,487 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 108 transitions. [2020-12-23 07:16:56,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-12-23 07:16:56,488 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 108 transitions. [2020-12-23 07:16:56,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-23 07:16:56,488 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:16:56,488 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:16:56,689 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-12-23 07:16:56,689 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:16:56,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:16:56,690 INFO L82 PathProgramCache]: Analyzing trace with hash 1743747647, now seen corresponding path program 25 times [2020-12-23 07:16:56,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:16:56,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340547686] [2020-12-23 07:16:56,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:16:56,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:16:58,482 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 171 proven. 194 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:16:58,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340547686] [2020-12-23 07:16:58,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825129150] [2020-12-23 07:16:58,482 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 [2020-12-23 07:16:58,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:16:58,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-23 07:16:58,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:16:58,542 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:17:00,407 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:17:00,432 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:17:00,432 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:17:00,434 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 07:17:00,439 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 07:17:01,671 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 196 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:17:01,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:17:01,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 63 [2020-12-23 07:17:01,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027710478] [2020-12-23 07:17:01,672 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-12-23 07:17:01,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:17:01,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-12-23 07:17:01,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=732, Invalid=3174, Unknown=0, NotChecked=0, Total=3906 [2020-12-23 07:17:01,673 INFO L87 Difference]: Start difference. First operand 104 states and 108 transitions. Second operand 63 states. [2020-12-23 07:17:02,508 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 21 [2020-12-23 07:17:02,801 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2020-12-23 07:17:03,631 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2020-12-23 07:17:03,927 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2020-12-23 07:17:04,226 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2020-12-23 07:17:04,519 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2020-12-23 07:17:05,355 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2020-12-23 07:17:05,653 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2020-12-23 07:17:06,536 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 23 [2020-12-23 07:17:06,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:17:06,770 INFO L93 Difference]: Finished difference Result 143 states and 147 transitions. [2020-12-23 07:17:06,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-23 07:17:06,772 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 69 [2020-12-23 07:17:06,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:17:06,774 INFO L225 Difference]: With dead ends: 143 [2020-12-23 07:17:06,774 INFO L226 Difference]: Without dead ends: 104 [2020-12-23 07:17:06,775 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2286 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=1197, Invalid=5123, Unknown=0, NotChecked=0, Total=6320 [2020-12-23 07:17:06,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-12-23 07:17:06,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2020-12-23 07:17:06,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-12-23 07:17:06,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 106 transitions. [2020-12-23 07:17:06,807 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 106 transitions. Word has length 69 [2020-12-23 07:17:06,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:17:06,807 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 106 transitions. [2020-12-23 07:17:06,807 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-12-23 07:17:06,807 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 106 transitions. [2020-12-23 07:17:06,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-23 07:17:06,808 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:17:06,808 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:17:07,021 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:17:07,021 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:17:07,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:17:07,022 INFO L82 PathProgramCache]: Analyzing trace with hash 1306018719, now seen corresponding path program 24 times [2020-12-23 07:17:07,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:17:07,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86275721] [2020-12-23 07:17:07,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:17:07,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:17:09,365 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 144 proven. 221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:17:09,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86275721] [2020-12-23 07:17:09,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618698617] [2020-12-23 07:17:09,366 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 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 [2020-12-23 07:17:09,437 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2020-12-23 07:17:09,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:17:09,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-23 07:17:09,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:17:09,454 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:17:11,243 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:17:11,316 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:17:11,318 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 07:17:12,670 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 169 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:17:12,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:17:12,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 63 [2020-12-23 07:17:12,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457083666] [2020-12-23 07:17:12,671 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-12-23 07:17:12,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:17:12,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-12-23 07:17:12,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=758, Invalid=3148, Unknown=0, NotChecked=0, Total=3906 [2020-12-23 07:17:12,672 INFO L87 Difference]: Start difference. First operand 103 states and 106 transitions. Second operand 63 states. [2020-12-23 07:17:16,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:17:16,745 INFO L93 Difference]: Finished difference Result 113 states and 116 transitions. [2020-12-23 07:17:16,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-23 07:17:16,747 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 69 [2020-12-23 07:17:16,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:17:16,748 INFO L225 Difference]: With dead ends: 113 [2020-12-23 07:17:16,748 INFO L226 Difference]: Without dead ends: 107 [2020-12-23 07:17:16,749 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2216 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=1682, Invalid=4638, Unknown=0, NotChecked=0, Total=6320 [2020-12-23 07:17:16,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-12-23 07:17:16,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 105. [2020-12-23 07:17:16,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-12-23 07:17:16,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 108 transitions. [2020-12-23 07:17:16,774 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 108 transitions. Word has length 69 [2020-12-23 07:17:16,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:17:16,774 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 108 transitions. [2020-12-23 07:17:16,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-12-23 07:17:16,775 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 108 transitions. [2020-12-23 07:17:16,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-23 07:17:16,775 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:17:16,775 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:17:16,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-12-23 07:17:16,976 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:17:16,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:17:16,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1229443073, now seen corresponding path program 25 times [2020-12-23 07:17:16,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:17:16,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284713962] [2020-12-23 07:17:16,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:17:16,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:17:19,027 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 169 proven. 223 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:17:19,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284713962] [2020-12-23 07:17:19,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99312597] [2020-12-23 07:17:19,027 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 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 [2020-12-23 07:17:19,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:17:19,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-23 07:17:19,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:17:19,094 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:17:21,465 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 07:17:21,489 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:17:21,492 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:17:21,494 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 07:17:21,505 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 07:17:22,956 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 196 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:17:22,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:17:22,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 68 [2020-12-23 07:17:22,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528047879] [2020-12-23 07:17:22,957 INFO L461 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-12-23 07:17:22,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:17:22,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-12-23 07:17:22,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=831, Invalid=3725, Unknown=0, NotChecked=0, Total=4556 [2020-12-23 07:17:22,958 INFO L87 Difference]: Start difference. First operand 105 states and 108 transitions. Second operand 68 states. [2020-12-23 07:17:23,456 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 22 [2020-12-23 07:17:23,691 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 20 [2020-12-23 07:17:23,959 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 26 [2020-12-23 07:17:24,317 WARN L197 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 28 [2020-12-23 07:17:24,659 WARN L197 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-23 07:17:25,027 WARN L197 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-23 07:17:25,394 WARN L197 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-23 07:17:25,759 WARN L197 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-23 07:17:26,129 WARN L197 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-23 07:17:26,484 WARN L197 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-23 07:17:26,844 WARN L197 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-23 07:17:27,225 WARN L197 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-23 07:17:27,600 WARN L197 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-23 07:17:27,988 WARN L197 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-23 07:17:28,358 WARN L197 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-23 07:17:28,726 WARN L197 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-23 07:17:29,101 WARN L197 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-23 07:17:29,491 WARN L197 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-23 07:17:29,881 WARN L197 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 30 [2020-12-23 07:17:30,177 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 25 [2020-12-23 07:17:30,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:17:30,571 INFO L93 Difference]: Finished difference Result 193 states and 198 transitions. [2020-12-23 07:17:30,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-23 07:17:30,573 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 71 [2020-12-23 07:17:30,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:17:30,574 INFO L225 Difference]: With dead ends: 193 [2020-12-23 07:17:30,574 INFO L226 Difference]: Without dead ends: 152 [2020-12-23 07:17:30,575 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2763 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=1479, Invalid=6531, Unknown=0, NotChecked=0, Total=8010 [2020-12-23 07:17:30,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-12-23 07:17:30,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 108. [2020-12-23 07:17:30,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-12-23 07:17:30,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 112 transitions. [2020-12-23 07:17:30,605 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 112 transitions. Word has length 71 [2020-12-23 07:17:30,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:17:30,605 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 112 transitions. [2020-12-23 07:17:30,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-12-23 07:17:30,605 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 112 transitions. [2020-12-23 07:17:30,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-23 07:17:30,605 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:17:30,605 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:17:30,806 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-12-23 07:17:30,806 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:17:30,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:17:30,807 INFO L82 PathProgramCache]: Analyzing trace with hash 198236733, now seen corresponding path program 26 times [2020-12-23 07:17:30,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:17:30,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068193460] [2020-12-23 07:17:30,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:17:30,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:17:33,695 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 169 proven. 223 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:17:33,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068193460] [2020-12-23 07:17:33,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640256465] [2020-12-23 07:17:33,696 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 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 [2020-12-23 07:17:33,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:17:33,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:17:33,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-23 07:17:33,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:17:33,762 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:17:35,818 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:17:35,884 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:17:35,887 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 07:17:37,557 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 196 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:17:37,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:17:37,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 68 [2020-12-23 07:17:37,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895605977] [2020-12-23 07:17:37,558 INFO L461 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-12-23 07:17:37,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:17:37,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-12-23 07:17:37,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=860, Invalid=3696, Unknown=0, NotChecked=0, Total=4556 [2020-12-23 07:17:37,558 INFO L87 Difference]: Start difference. First operand 108 states and 112 transitions. Second operand 68 states. [2020-12-23 07:17:42,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:17:42,112 INFO L93 Difference]: Finished difference Result 131 states and 134 transitions. [2020-12-23 07:17:42,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-23 07:17:42,112 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 71 [2020-12-23 07:17:42,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:17:42,113 INFO L225 Difference]: With dead ends: 131 [2020-12-23 07:17:42,113 INFO L226 Difference]: Without dead ends: 125 [2020-12-23 07:17:42,113 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2629 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=1967, Invalid=5689, Unknown=0, NotChecked=0, Total=7656 [2020-12-23 07:17:42,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-12-23 07:17:42,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 110. [2020-12-23 07:17:42,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-12-23 07:17:42,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 114 transitions. [2020-12-23 07:17:42,136 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 114 transitions. Word has length 71 [2020-12-23 07:17:42,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:17:42,136 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 114 transitions. [2020-12-23 07:17:42,137 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-12-23 07:17:42,137 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 114 transitions. [2020-12-23 07:17:42,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-23 07:17:42,137 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:17:42,137 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:17:42,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-12-23 07:17:42,338 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:17:42,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:17:42,339 INFO L82 PathProgramCache]: Analyzing trace with hash -718963041, now seen corresponding path program 27 times [2020-12-23 07:17:42,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:17:42,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444817863] [2020-12-23 07:17:42,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:17:42,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:17:44,426 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 198 proven. 223 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:17:44,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444817863] [2020-12-23 07:17:44,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127897791] [2020-12-23 07:17:44,426 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 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 [2020-12-23 07:17:44,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-12-23 07:17:44,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:17:44,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-23 07:17:44,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:17:44,517 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:17:46,873 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:17:46,903 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:17:46,904 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:17:46,906 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 07:17:46,911 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts