/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/seq-mthreaded-reduced/pals_opt-floodmax.4.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 09:07:13,670 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 09:07:13,673 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 09:07:13,709 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 09:07:13,709 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 09:07:13,711 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 09:07:13,713 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 09:07:13,715 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 09:07:13,717 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 09:07:13,719 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 09:07:13,720 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 09:07:13,723 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 09:07:13,724 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 09:07:13,728 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 09:07:13,730 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 09:07:13,743 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 09:07:13,745 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 09:07:13,746 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 09:07:13,748 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 09:07:13,753 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 09:07:13,757 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 09:07:13,762 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 09:07:13,764 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 09:07:13,765 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 09:07:13,772 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 09:07:13,790 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 09:07:13,791 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 09:07:13,792 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 09:07:13,798 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 09:07:13,862 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 09:07:13,863 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 09:07:13,864 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 09:07:13,865 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 09:07:13,866 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 09:07:13,867 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 09:07:13,867 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 09:07:13,867 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 09:07:13,867 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 09:07:13,868 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 09:07:13,869 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 09:07:13,869 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 09:07:13,869 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 09:07:13,870 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 09:07:13,870 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 09:07:13,870 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 09:07:13,871 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 09:07:13,871 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:07:13,871 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 09:07:13,872 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 09:07:13,872 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 09:07:13,872 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 09:07:13,872 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 09:07:13,873 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 09:07:13,873 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 09:07:13,873 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/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 09:07:14,307 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 09:07:14,354 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 09:07:14,357 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 09:07:14,359 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 09:07:14,360 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 09:07:14,361 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-12-22 09:07:14,443 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d927c6511/8a58f41b741b4dcfbadfde35d5e24c22/FLAG38a042ff4 [2020-12-22 09:07:15,148 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 09:07:15,149 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-12-22 09:07:15,186 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d927c6511/8a58f41b741b4dcfbadfde35d5e24c22/FLAG38a042ff4 [2020-12-22 09:07:15,370 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d927c6511/8a58f41b741b4dcfbadfde35d5e24c22 [2020-12-22 09:07:15,373 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 09:07:15,375 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 09:07:15,377 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 09:07:15,377 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 09:07:15,384 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 09:07:15,385 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:07:15" (1/1) ... [2020-12-22 09:07:15,386 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52c46d91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:07:15, skipping insertion in model container [2020-12-22 09:07:15,387 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:07:15" (1/1) ... [2020-12-22 09:07:15,396 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 09:07:15,507 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 09:07:16,028 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[26386,26399] [2020-12-22 09:07:16,336 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:07:16,352 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 09:07:16,665 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[26386,26399] [2020-12-22 09:07:16,804 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:07:16,828 INFO L208 MainTranslator]: Completed translation [2020-12-22 09:07:16,829 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:07:16 WrapperNode [2020-12-22 09:07:16,829 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 09:07:16,831 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 09:07:16,831 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 09:07:16,831 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 09:07:16,840 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:07:16" (1/1) ... [2020-12-22 09:07:16,869 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:07:16" (1/1) ... [2020-12-22 09:07:16,962 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 09:07:16,963 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 09:07:16,965 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 09:07:16,965 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 09:07:16,976 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:07:16" (1/1) ... [2020-12-22 09:07:16,979 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:07:16" (1/1) ... [2020-12-22 09:07:17,000 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:07:16" (1/1) ... [2020-12-22 09:07:17,001 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:07:16" (1/1) ... [2020-12-22 09:07:17,053 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:07:16" (1/1) ... [2020-12-22 09:07:17,097 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:07:16" (1/1) ... [2020-12-22 09:07:17,115 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:07:16" (1/1) ... [2020-12-22 09:07:17,133 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 09:07:17,135 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 09:07:17,135 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 09:07:17,135 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 09:07:17,137 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:07:16" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:07:17,256 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 09:07:17,256 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 09:07:17,257 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 09:07:17,257 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 09:07:19,741 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 09:07:19,741 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 09:07:19,744 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:07:19 BoogieIcfgContainer [2020-12-22 09:07:19,744 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 09:07:19,746 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 09:07:19,746 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 09:07:19,750 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 09:07:19,750 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:07:15" (1/3) ... [2020-12-22 09:07:19,751 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3df04d9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:07:19, skipping insertion in model container [2020-12-22 09:07:19,751 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:07:16" (2/3) ... [2020-12-22 09:07:19,752 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3df04d9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:07:19, skipping insertion in model container [2020-12-22 09:07:19,752 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:07:19" (3/3) ... [2020-12-22 09:07:19,753 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-12-22 09:07:19,760 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 09:07:19,766 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 09:07:19,785 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 09:07:19,819 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 09:07:19,819 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 09:07:19,819 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 09:07:19,819 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 09:07:19,819 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 09:07:19,820 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 09:07:19,820 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 09:07:19,820 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 09:07:19,849 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states. [2020-12-22 09:07:19,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2020-12-22 09:07:19,876 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:07:19,877 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:07:19,877 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:07:19,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:07:19,887 INFO L82 PathProgramCache]: Analyzing trace with hash -752065630, now seen corresponding path program 1 times [2020-12-22 09:07:19,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:07:19,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829593336] [2020-12-22 09:07:19,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:07:20,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:07:20,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:07:20,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829593336] [2020-12-22 09:07:20,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:07:20,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:07:20,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053155202] [2020-12-22 09:07:20,869 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:07:20,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:07:20,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:07:20,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:07:20,888 INFO L87 Difference]: Start difference. First operand 647 states. Second operand 3 states. [2020-12-22 09:07:21,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:07:21,187 INFO L93 Difference]: Finished difference Result 1200 states and 2109 transitions. [2020-12-22 09:07:21,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:07:21,189 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 250 [2020-12-22 09:07:21,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:07:21,217 INFO L225 Difference]: With dead ends: 1200 [2020-12-22 09:07:21,218 INFO L226 Difference]: Without dead ends: 995 [2020-12-22 09:07:21,223 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:07:21,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 995 states. [2020-12-22 09:07:21,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 995 to 993. [2020-12-22 09:07:21,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 993 states. [2020-12-22 09:07:21,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 993 states to 993 states and 1564 transitions. [2020-12-22 09:07:21,343 INFO L78 Accepts]: Start accepts. Automaton has 993 states and 1564 transitions. Word has length 250 [2020-12-22 09:07:21,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:07:21,348 INFO L481 AbstractCegarLoop]: Abstraction has 993 states and 1564 transitions. [2020-12-22 09:07:21,348 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:07:21,348 INFO L276 IsEmpty]: Start isEmpty. Operand 993 states and 1564 transitions. [2020-12-22 09:07:21,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2020-12-22 09:07:21,360 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:07:21,365 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:07:21,365 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 09:07:21,365 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:07:21,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:07:21,366 INFO L82 PathProgramCache]: Analyzing trace with hash -734902992, now seen corresponding path program 1 times [2020-12-22 09:07:21,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:07:21,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530296820] [2020-12-22 09:07:21,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:07:21,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:07:22,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:07:22,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530296820] [2020-12-22 09:07:22,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:07:22,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:07:22,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564617145] [2020-12-22 09:07:22,092 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:07:22,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:07:22,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:07:22,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:07:22,095 INFO L87 Difference]: Start difference. First operand 993 states and 1564 transitions. Second operand 4 states. [2020-12-22 09:07:22,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:07:22,327 INFO L93 Difference]: Finished difference Result 2928 states and 4605 transitions. [2020-12-22 09:07:22,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:07:22,328 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 250 [2020-12-22 09:07:22,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:07:22,343 INFO L225 Difference]: With dead ends: 2928 [2020-12-22 09:07:22,343 INFO L226 Difference]: Without dead ends: 1946 [2020-12-22 09:07:22,351 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:07:22,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1946 states. [2020-12-22 09:07:22,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1946 to 1944. [2020-12-22 09:07:22,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1944 states. [2020-12-22 09:07:22,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1944 states to 1944 states and 3042 transitions. [2020-12-22 09:07:22,494 INFO L78 Accepts]: Start accepts. Automaton has 1944 states and 3042 transitions. Word has length 250 [2020-12-22 09:07:22,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:07:22,495 INFO L481 AbstractCegarLoop]: Abstraction has 1944 states and 3042 transitions. [2020-12-22 09:07:22,496 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:07:22,496 INFO L276 IsEmpty]: Start isEmpty. Operand 1944 states and 3042 transitions. [2020-12-22 09:07:22,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2020-12-22 09:07:22,506 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:07:22,507 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:07:22,507 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 09:07:22,507 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:07:22,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:07:22,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1212040729, now seen corresponding path program 1 times [2020-12-22 09:07:22,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:07:22,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608814732] [2020-12-22 09:07:22,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:07:22,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:07:22,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:07:22,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608814732] [2020-12-22 09:07:22,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:07:22,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:07:22,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883904749] [2020-12-22 09:07:22,806 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:07:22,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:07:22,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:07:22,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:07:22,807 INFO L87 Difference]: Start difference. First operand 1944 states and 3042 transitions. Second operand 3 states. [2020-12-22 09:07:23,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:07:23,025 INFO L93 Difference]: Finished difference Result 5635 states and 8782 transitions. [2020-12-22 09:07:23,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:07:23,026 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 252 [2020-12-22 09:07:23,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:07:23,047 INFO L225 Difference]: With dead ends: 5635 [2020-12-22 09:07:23,048 INFO L226 Difference]: Without dead ends: 3816 [2020-12-22 09:07:23,052 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:07:23,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3816 states. [2020-12-22 09:07:23,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3816 to 3814. [2020-12-22 09:07:23,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3814 states. [2020-12-22 09:07:23,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3814 states to 3814 states and 5935 transitions. [2020-12-22 09:07:23,240 INFO L78 Accepts]: Start accepts. Automaton has 3814 states and 5935 transitions. Word has length 252 [2020-12-22 09:07:23,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:07:23,241 INFO L481 AbstractCegarLoop]: Abstraction has 3814 states and 5935 transitions. [2020-12-22 09:07:23,241 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:07:23,241 INFO L276 IsEmpty]: Start isEmpty. Operand 3814 states and 5935 transitions. [2020-12-22 09:07:23,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2020-12-22 09:07:23,250 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:07:23,250 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:07:23,251 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 09:07:23,251 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:07:23,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:07:23,252 INFO L82 PathProgramCache]: Analyzing trace with hash -1552055970, now seen corresponding path program 1 times [2020-12-22 09:07:23,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:07:23,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746738863] [2020-12-22 09:07:23,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:07:23,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:07:23,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:07:23,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746738863] [2020-12-22 09:07:23,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:07:23,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:07:23,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254244448] [2020-12-22 09:07:23,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:07:23,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:07:23,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:07:23,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:07:23,428 INFO L87 Difference]: Start difference. First operand 3814 states and 5935 transitions. Second operand 3 states. [2020-12-22 09:07:23,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:07:23,885 INFO L93 Difference]: Finished difference Result 11375 states and 17689 transitions. [2020-12-22 09:07:23,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:07:23,886 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 252 [2020-12-22 09:07:23,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:07:23,941 INFO L225 Difference]: With dead ends: 11375 [2020-12-22 09:07:23,942 INFO L226 Difference]: Without dead ends: 7599 [2020-12-22 09:07:23,954 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:07:23,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7599 states. [2020-12-22 09:07:24,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7599 to 3833. [2020-12-22 09:07:24,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3833 states. [2020-12-22 09:07:24,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3833 states to 3833 states and 5963 transitions. [2020-12-22 09:07:24,375 INFO L78 Accepts]: Start accepts. Automaton has 3833 states and 5963 transitions. Word has length 252 [2020-12-22 09:07:24,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:07:24,375 INFO L481 AbstractCegarLoop]: Abstraction has 3833 states and 5963 transitions. [2020-12-22 09:07:24,375 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:07:24,375 INFO L276 IsEmpty]: Start isEmpty. Operand 3833 states and 5963 transitions. [2020-12-22 09:07:24,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2020-12-22 09:07:24,384 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:07:24,384 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:07:24,385 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 09:07:24,385 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:07:24,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:07:24,386 INFO L82 PathProgramCache]: Analyzing trace with hash 559793920, now seen corresponding path program 1 times [2020-12-22 09:07:24,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:07:24,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789465678] [2020-12-22 09:07:24,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:07:24,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:07:24,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:07:24,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789465678] [2020-12-22 09:07:24,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:07:24,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:07:24,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233082463] [2020-12-22 09:07:24,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:07:24,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:07:24,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:07:24,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:07:24,581 INFO L87 Difference]: Start difference. First operand 3833 states and 5963 transitions. Second operand 3 states. [2020-12-22 09:07:25,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:07:25,013 INFO L93 Difference]: Finished difference Result 11394 states and 17710 transitions. [2020-12-22 09:07:25,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:07:25,017 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 253 [2020-12-22 09:07:25,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:07:25,059 INFO L225 Difference]: With dead ends: 11394 [2020-12-22 09:07:25,059 INFO L226 Difference]: Without dead ends: 7617 [2020-12-22 09:07:25,070 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:07:25,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7617 states. [2020-12-22 09:07:25,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7617 to 3851. [2020-12-22 09:07:25,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3851 states. [2020-12-22 09:07:25,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3851 states to 3851 states and 5984 transitions. [2020-12-22 09:07:25,466 INFO L78 Accepts]: Start accepts. Automaton has 3851 states and 5984 transitions. Word has length 253 [2020-12-22 09:07:25,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:07:25,467 INFO L481 AbstractCegarLoop]: Abstraction has 3851 states and 5984 transitions. [2020-12-22 09:07:25,467 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:07:25,467 INFO L276 IsEmpty]: Start isEmpty. Operand 3851 states and 5984 transitions. [2020-12-22 09:07:25,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2020-12-22 09:07:25,477 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:07:25,477 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:07:25,478 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 09:07:25,478 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:07:25,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:07:25,478 INFO L82 PathProgramCache]: Analyzing trace with hash -1276481708, now seen corresponding path program 1 times [2020-12-22 09:07:25,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:07:25,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061119192] [2020-12-22 09:07:25,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:07:25,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:07:25,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:07:25,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061119192] [2020-12-22 09:07:25,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:07:25,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:07:25,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538420033] [2020-12-22 09:07:25,641 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:07:25,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:07:25,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:07:25,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:07:25,643 INFO L87 Difference]: Start difference. First operand 3851 states and 5984 transitions. Second operand 3 states. [2020-12-22 09:07:26,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:07:26,094 INFO L93 Difference]: Finished difference Result 8637 states and 13520 transitions. [2020-12-22 09:07:26,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:07:26,095 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 254 [2020-12-22 09:07:26,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:07:26,124 INFO L225 Difference]: With dead ends: 8637 [2020-12-22 09:07:26,124 INFO L226 Difference]: Without dead ends: 5601 [2020-12-22 09:07:26,132 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:07:26,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5601 states. [2020-12-22 09:07:26,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5601 to 4867. [2020-12-22 09:07:26,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4867 states. [2020-12-22 09:07:26,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4867 states to 4867 states and 7670 transitions. [2020-12-22 09:07:26,478 INFO L78 Accepts]: Start accepts. Automaton has 4867 states and 7670 transitions. Word has length 254 [2020-12-22 09:07:26,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:07:26,478 INFO L481 AbstractCegarLoop]: Abstraction has 4867 states and 7670 transitions. [2020-12-22 09:07:26,479 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:07:26,479 INFO L276 IsEmpty]: Start isEmpty. Operand 4867 states and 7670 transitions. [2020-12-22 09:07:26,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2020-12-22 09:07:26,488 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:07:26,489 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:07:26,489 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 09:07:26,489 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:07:26,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:07:26,490 INFO L82 PathProgramCache]: Analyzing trace with hash -1741200748, now seen corresponding path program 1 times [2020-12-22 09:07:26,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:07:26,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225798775] [2020-12-22 09:07:26,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:07:26,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:07:26,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:07:26,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225798775] [2020-12-22 09:07:26,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:07:26,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:07:26,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418184649] [2020-12-22 09:07:26,810 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:07:26,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:07:26,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:07:26,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:07:26,811 INFO L87 Difference]: Start difference. First operand 4867 states and 7670 transitions. Second operand 3 states. [2020-12-22 09:07:27,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:07:27,458 INFO L93 Difference]: Finished difference Result 14074 states and 22115 transitions. [2020-12-22 09:07:27,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:07:27,459 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 254 [2020-12-22 09:07:27,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:07:27,484 INFO L225 Difference]: With dead ends: 14074 [2020-12-22 09:07:27,485 INFO L226 Difference]: Without dead ends: 9448 [2020-12-22 09:07:27,540 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:07:27,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9448 states. [2020-12-22 09:07:28,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9448 to 9446. [2020-12-22 09:07:28,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9446 states. [2020-12-22 09:07:28,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9446 states to 9446 states and 14788 transitions. [2020-12-22 09:07:28,157 INFO L78 Accepts]: Start accepts. Automaton has 9446 states and 14788 transitions. Word has length 254 [2020-12-22 09:07:28,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:07:28,157 INFO L481 AbstractCegarLoop]: Abstraction has 9446 states and 14788 transitions. [2020-12-22 09:07:28,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:07:28,158 INFO L276 IsEmpty]: Start isEmpty. Operand 9446 states and 14788 transitions. [2020-12-22 09:07:28,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2020-12-22 09:07:28,172 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:07:28,173 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:07:28,173 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 09:07:28,173 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:07:28,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:07:28,174 INFO L82 PathProgramCache]: Analyzing trace with hash -643816655, now seen corresponding path program 1 times [2020-12-22 09:07:28,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:07:28,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041600310] [2020-12-22 09:07:28,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:07:28,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:07:28,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:07:28,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041600310] [2020-12-22 09:07:28,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:07:28,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:07:28,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472891942] [2020-12-22 09:07:28,686 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:07:28,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:07:28,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:07:28,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:07:28,687 INFO L87 Difference]: Start difference. First operand 9446 states and 14788 transitions. Second operand 5 states. [2020-12-22 09:07:29,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:07:29,861 INFO L93 Difference]: Finished difference Result 27712 states and 43341 transitions. [2020-12-22 09:07:29,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:07:29,862 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 254 [2020-12-22 09:07:29,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:07:29,917 INFO L225 Difference]: With dead ends: 27712 [2020-12-22 09:07:29,917 INFO L226 Difference]: Without dead ends: 18321 [2020-12-22 09:07:29,941 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:07:29,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18321 states. [2020-12-22 09:07:31,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18321 to 18319. [2020-12-22 09:07:31,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18319 states. [2020-12-22 09:07:31,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18319 states to 18319 states and 28473 transitions. [2020-12-22 09:07:31,374 INFO L78 Accepts]: Start accepts. Automaton has 18319 states and 28473 transitions. Word has length 254 [2020-12-22 09:07:31,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:07:31,375 INFO L481 AbstractCegarLoop]: Abstraction has 18319 states and 28473 transitions. [2020-12-22 09:07:31,375 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:07:31,375 INFO L276 IsEmpty]: Start isEmpty. Operand 18319 states and 28473 transitions. [2020-12-22 09:07:31,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2020-12-22 09:07:31,402 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:07:31,402 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:07:31,402 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 09:07:31,403 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:07:31,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:07:31,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1048435692, now seen corresponding path program 1 times [2020-12-22 09:07:31,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:07:31,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3154052] [2020-12-22 09:07:31,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:07:31,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:07:31,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:07:31,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3154052] [2020-12-22 09:07:31,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:07:31,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:07:31,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651402665] [2020-12-22 09:07:31,613 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:07:31,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:07:31,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:07:31,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:07:31,614 INFO L87 Difference]: Start difference. First operand 18319 states and 28473 transitions. Second operand 3 states. [2020-12-22 09:07:33,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:07:33,420 INFO L93 Difference]: Finished difference Result 53601 states and 83138 transitions. [2020-12-22 09:07:33,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:07:33,423 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 256 [2020-12-22 09:07:33,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:07:33,508 INFO L225 Difference]: With dead ends: 53601 [2020-12-22 09:07:33,508 INFO L226 Difference]: Without dead ends: 35799 [2020-12-22 09:07:33,536 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:07:33,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35799 states. [2020-12-22 09:07:35,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35799 to 35797. [2020-12-22 09:07:35,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35797 states. [2020-12-22 09:07:35,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35797 states to 35797 states and 55274 transitions. [2020-12-22 09:07:35,972 INFO L78 Accepts]: Start accepts. Automaton has 35797 states and 55274 transitions. Word has length 256 [2020-12-22 09:07:35,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:07:35,973 INFO L481 AbstractCegarLoop]: Abstraction has 35797 states and 55274 transitions. [2020-12-22 09:07:35,973 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:07:35,973 INFO L276 IsEmpty]: Start isEmpty. Operand 35797 states and 55274 transitions. [2020-12-22 09:07:36,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2020-12-22 09:07:36,021 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:07:36,021 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:07:36,021 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 09:07:36,022 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:07:36,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:07:36,022 INFO L82 PathProgramCache]: Analyzing trace with hash 342648817, now seen corresponding path program 1 times [2020-12-22 09:07:36,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:07:36,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137194394] [2020-12-22 09:07:36,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:07:36,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:07:36,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:07:36,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137194394] [2020-12-22 09:07:36,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:07:36,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:07:36,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842077919] [2020-12-22 09:07:36,442 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:07:36,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:07:36,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:07:36,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:07:36,443 INFO L87 Difference]: Start difference. First operand 35797 states and 55274 transitions. Second operand 5 states. [2020-12-22 09:07:39,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:07:39,691 INFO L93 Difference]: Finished difference Result 103852 states and 159996 transitions. [2020-12-22 09:07:39,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:07:39,692 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 256 [2020-12-22 09:07:39,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:07:39,912 INFO L225 Difference]: With dead ends: 103852 [2020-12-22 09:07:39,912 INFO L226 Difference]: Without dead ends: 68206 [2020-12-22 09:07:39,987 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:07:40,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68206 states. [2020-12-22 09:07:43,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68206 to 68204. [2020-12-22 09:07:43,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68204 states. [2020-12-22 09:07:44,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68204 states to 68204 states and 104320 transitions. [2020-12-22 09:07:44,044 INFO L78 Accepts]: Start accepts. Automaton has 68204 states and 104320 transitions. Word has length 256 [2020-12-22 09:07:44,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:07:44,044 INFO L481 AbstractCegarLoop]: Abstraction has 68204 states and 104320 transitions. [2020-12-22 09:07:44,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:07:44,044 INFO L276 IsEmpty]: Start isEmpty. Operand 68204 states and 104320 transitions. [2020-12-22 09:07:44,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2020-12-22 09:07:44,162 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:07:44,162 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:07:44,163 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 09:07:44,163 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:07:44,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:07:44,164 INFO L82 PathProgramCache]: Analyzing trace with hash -159280527, now seen corresponding path program 1 times [2020-12-22 09:07:44,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:07:44,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190228743] [2020-12-22 09:07:44,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:07:44,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:07:44,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:07:44,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190228743] [2020-12-22 09:07:44,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:07:44,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:07:44,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401227086] [2020-12-22 09:07:44,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:07:44,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:07:44,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:07:44,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:07:44,530 INFO L87 Difference]: Start difference. First operand 68204 states and 104320 transitions. Second operand 4 states. [2020-12-22 09:07:51,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:07:51,055 INFO L93 Difference]: Finished difference Result 201335 states and 307509 transitions. [2020-12-22 09:07:51,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:07:51,055 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 256 [2020-12-22 09:07:51,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:07:51,538 INFO L225 Difference]: With dead ends: 201335 [2020-12-22 09:07:51,538 INFO L226 Difference]: Without dead ends: 133413 [2020-12-22 09:07:51,628 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:07:51,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133413 states. [2020-12-22 09:07:58,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133413 to 133411. [2020-12-22 09:07:58,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133411 states. [2020-12-22 09:07:59,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133411 states to 133411 states and 202640 transitions. [2020-12-22 09:07:59,273 INFO L78 Accepts]: Start accepts. Automaton has 133411 states and 202640 transitions. Word has length 256 [2020-12-22 09:07:59,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:07:59,273 INFO L481 AbstractCegarLoop]: Abstraction has 133411 states and 202640 transitions. [2020-12-22 09:07:59,273 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:07:59,274 INFO L276 IsEmpty]: Start isEmpty. Operand 133411 states and 202640 transitions. [2020-12-22 09:07:59,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2020-12-22 09:07:59,390 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:07:59,390 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:07:59,391 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 09:07:59,391 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:07:59,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:07:59,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1439300305, now seen corresponding path program 1 times [2020-12-22 09:07:59,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:07:59,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59445794] [2020-12-22 09:07:59,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:07:59,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:07:59,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:07:59,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59445794] [2020-12-22 09:07:59,938 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:07:59,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:07:59,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956470429] [2020-12-22 09:07:59,939 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:07:59,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:07:59,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:07:59,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:07:59,940 INFO L87 Difference]: Start difference. First operand 133411 states and 202640 transitions. Second operand 3 states. [2020-12-22 09:08:11,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:08:11,730 INFO L93 Difference]: Finished difference Result 392312 states and 594644 transitions. [2020-12-22 09:08:11,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:08:11,731 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 258 [2020-12-22 09:08:11,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:08:12,297 INFO L225 Difference]: With dead ends: 392312 [2020-12-22 09:08:12,297 INFO L226 Difference]: Without dead ends: 261414 [2020-12-22 09:08:12,464 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:08:12,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261414 states. [2020-12-22 09:08:26,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261414 to 261412. [2020-12-22 09:08:26,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261412 states. [2020-12-22 09:08:27,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261412 states to 261412 states and 394386 transitions. [2020-12-22 09:08:27,565 INFO L78 Accepts]: Start accepts. Automaton has 261412 states and 394386 transitions. Word has length 258 [2020-12-22 09:08:27,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:08:27,566 INFO L481 AbstractCegarLoop]: Abstraction has 261412 states and 394386 transitions. [2020-12-22 09:08:27,566 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:08:27,566 INFO L276 IsEmpty]: Start isEmpty. Operand 261412 states and 394386 transitions. [2020-12-22 09:08:27,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2020-12-22 09:08:27,708 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:08:27,710 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:08:27,710 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 09:08:27,710 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:08:27,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:08:27,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1926516182, now seen corresponding path program 1 times [2020-12-22 09:08:27,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:08:27,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867340505] [2020-12-22 09:08:27,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:08:27,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:08:27,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:08:27,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867340505] [2020-12-22 09:08:27,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:08:27,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:08:27,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722852750] [2020-12-22 09:08:27,817 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:08:27,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:08:27,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:08:27,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:08:27,818 INFO L87 Difference]: Start difference. First operand 261412 states and 394386 transitions. Second operand 3 states. [2020-12-22 09:08:51,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:08:51,670 INFO L93 Difference]: Finished difference Result 779052 states and 1174458 transitions. [2020-12-22 09:08:51,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:08:51,671 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 258 [2020-12-22 09:08:51,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:08:52,783 INFO L225 Difference]: With dead ends: 779052 [2020-12-22 09:08:52,784 INFO L226 Difference]: Without dead ends: 518736 [2020-12-22 09:08:53,337 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:08:53,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518736 states. [2020-12-22 09:09:12,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518736 to 261638. [2020-12-22 09:09:12,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261638 states. [2020-12-22 09:09:13,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261638 states to 261638 states and 394674 transitions. [2020-12-22 09:09:13,198 INFO L78 Accepts]: Start accepts. Automaton has 261638 states and 394674 transitions. Word has length 258 [2020-12-22 09:09:13,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:09:13,199 INFO L481 AbstractCegarLoop]: Abstraction has 261638 states and 394674 transitions. [2020-12-22 09:09:13,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:09:13,199 INFO L276 IsEmpty]: Start isEmpty. Operand 261638 states and 394674 transitions. [2020-12-22 09:09:13,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2020-12-22 09:09:13,346 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:09:13,346 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:09:13,346 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 09:09:13,346 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:09:13,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:09:13,347 INFO L82 PathProgramCache]: Analyzing trace with hash -126263934, now seen corresponding path program 1 times [2020-12-22 09:09:13,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:09:13,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547165428] [2020-12-22 09:09:13,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:09:13,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat