/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_lcr-var-start-time.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 08:25:39,838 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 08:25:39,843 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 08:25:39,889 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 08:25:39,889 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 08:25:39,891 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 08:25:39,893 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 08:25:39,895 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 08:25:39,897 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 08:25:39,899 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 08:25:39,900 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 08:25:39,901 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 08:25:39,902 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 08:25:39,903 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 08:25:39,905 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 08:25:39,906 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 08:25:39,907 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 08:25:39,909 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 08:25:39,911 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 08:25:39,913 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 08:25:39,915 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 08:25:39,917 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 08:25:39,918 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 08:25:39,919 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 08:25:39,923 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 08:25:39,949 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 08:25:39,951 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 08:25:39,952 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 08:25:39,953 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 08:25:39,988 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 08:25:39,989 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 08:25:39,991 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 08:25:39,991 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 08:25:39,992 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 08:25:39,992 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 08:25:39,992 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 08:25:39,992 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 08:25:39,993 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 08:25:39,993 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 08:25:39,994 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 08:25:39,995 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 08:25:39,995 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 08:25:39,995 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 08:25:39,995 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 08:25:39,996 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 08:25:39,996 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 08:25:39,996 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 08:25:39,996 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 08:25:39,996 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 08:25:39,997 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 08:25:39,997 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 08:25:39,997 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 08:25:39,997 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 08:25:39,997 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 08:25:39,998 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 08:25:40,399 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 08:25:40,442 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 08:25:40,447 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 08:25:40,448 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 08:25:40,449 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 08:25:40,450 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-12-22 08:25:40,533 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de31be8b0/de3e9cbeb4b343008305ad6a7cd66de5/FLAGf20045696 [2020-12-22 08:25:41,193 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 08:25:41,194 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-12-22 08:25:41,209 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de31be8b0/de3e9cbeb4b343008305ad6a7cd66de5/FLAGf20045696 [2020-12-22 08:25:41,522 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de31be8b0/de3e9cbeb4b343008305ad6a7cd66de5 [2020-12-22 08:25:41,525 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 08:25:41,527 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 08:25:41,531 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 08:25:41,532 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 08:25:41,536 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 08:25:41,537 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:25:41" (1/1) ... [2020-12-22 08:25:41,539 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58dd71e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:25:41, skipping insertion in model container [2020-12-22 08:25:41,540 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:25:41" (1/1) ... [2020-12-22 08:25:41,549 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 08:25:41,630 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 08:25:41,875 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_lcr-var-start-time.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c[6847,6860] [2020-12-22 08:25:42,023 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:25:42,039 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 08:25:42,092 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_lcr-var-start-time.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c[6847,6860] [2020-12-22 08:25:42,143 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:25:42,181 INFO L208 MainTranslator]: Completed translation [2020-12-22 08:25:42,182 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:25:42 WrapperNode [2020-12-22 08:25:42,182 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 08:25:42,184 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 08:25:42,184 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 08:25:42,184 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 08:25:42,195 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:25:42" (1/1) ... [2020-12-22 08:25:42,211 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:25:42" (1/1) ... [2020-12-22 08:25:42,262 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 08:25:42,263 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 08:25:42,264 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 08:25:42,264 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 08:25:42,276 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:25:42" (1/1) ... [2020-12-22 08:25:42,277 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:25:42" (1/1) ... [2020-12-22 08:25:42,282 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:25:42" (1/1) ... [2020-12-22 08:25:42,282 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:25:42" (1/1) ... [2020-12-22 08:25:42,297 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:25:42" (1/1) ... [2020-12-22 08:25:42,315 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:25:42" (1/1) ... [2020-12-22 08:25:42,324 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:25:42" (1/1) ... [2020-12-22 08:25:42,335 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 08:25:42,336 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 08:25:42,338 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 08:25:42,338 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 08:25:42,339 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:25:42" (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 08:25:42,508 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 08:25:42,509 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 08:25:42,510 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 08:25:42,511 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 08:25:43,724 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 08:25:43,725 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 08:25:43,727 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:25:43 BoogieIcfgContainer [2020-12-22 08:25:43,727 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 08:25:43,729 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 08:25:43,729 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 08:25:43,733 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 08:25:43,734 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 08:25:41" (1/3) ... [2020-12-22 08:25:43,735 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60c3a5b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:25:43, skipping insertion in model container [2020-12-22 08:25:43,735 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:25:42" (2/3) ... [2020-12-22 08:25:43,736 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60c3a5b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:25:43, skipping insertion in model container [2020-12-22 08:25:43,736 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:25:43" (3/3) ... [2020-12-22 08:25:43,738 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-12-22 08:25:43,745 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 08:25:43,751 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 08:25:43,774 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 08:25:43,805 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 08:25:43,805 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 08:25:43,806 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 08:25:43,806 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 08:25:43,806 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 08:25:43,806 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 08:25:43,806 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 08:25:43,806 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 08:25:43,828 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states. [2020-12-22 08:25:43,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 08:25:43,838 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:25:43,839 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] [2020-12-22 08:25:43,839 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:25:43,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:25:43,846 INFO L82 PathProgramCache]: Analyzing trace with hash -1338980314, now seen corresponding path program 1 times [2020-12-22 08:25:43,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:25:43,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143638114] [2020-12-22 08:25:43,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:25:44,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:25:44,407 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 08:25:44,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143638114] [2020-12-22 08:25:44,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:25:44,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:25:44,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237136426] [2020-12-22 08:25:44,419 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:25:44,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:25:44,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:25:44,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:25:44,443 INFO L87 Difference]: Start difference. First operand 180 states. Second operand 3 states. [2020-12-22 08:25:44,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:25:44,643 INFO L93 Difference]: Finished difference Result 365 states and 600 transitions. [2020-12-22 08:25:44,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:25:44,646 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2020-12-22 08:25:44,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:25:44,673 INFO L225 Difference]: With dead ends: 365 [2020-12-22 08:25:44,674 INFO L226 Difference]: Without dead ends: 275 [2020-12-22 08:25:44,678 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 08:25:44,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2020-12-22 08:25:44,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 273. [2020-12-22 08:25:44,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 273 states. [2020-12-22 08:25:44,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 409 transitions. [2020-12-22 08:25:44,757 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 409 transitions. Word has length 65 [2020-12-22 08:25:44,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:25:44,757 INFO L481 AbstractCegarLoop]: Abstraction has 273 states and 409 transitions. [2020-12-22 08:25:44,758 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:25:44,758 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 409 transitions. [2020-12-22 08:25:44,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 08:25:44,764 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:25:44,764 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] [2020-12-22 08:25:44,764 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 08:25:44,765 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:25:44,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:25:44,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1162317624, now seen corresponding path program 1 times [2020-12-22 08:25:44,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:25:44,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519322673] [2020-12-22 08:25:44,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:25:44,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:25:45,085 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 08:25:45,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519322673] [2020-12-22 08:25:45,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:25:45,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:25:45,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034414408] [2020-12-22 08:25:45,088 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:25:45,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:25:45,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:25:45,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:25:45,090 INFO L87 Difference]: Start difference. First operand 273 states and 409 transitions. Second operand 6 states. [2020-12-22 08:25:45,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:25:45,406 INFO L93 Difference]: Finished difference Result 1003 states and 1541 transitions. [2020-12-22 08:25:45,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:25:45,407 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-12-22 08:25:45,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:25:45,414 INFO L225 Difference]: With dead ends: 1003 [2020-12-22 08:25:45,414 INFO L226 Difference]: Without dead ends: 793 [2020-12-22 08:25:45,417 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:25:45,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2020-12-22 08:25:45,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 787. [2020-12-22 08:25:45,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 787 states. [2020-12-22 08:25:45,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 787 states to 787 states and 1199 transitions. [2020-12-22 08:25:45,533 INFO L78 Accepts]: Start accepts. Automaton has 787 states and 1199 transitions. Word has length 66 [2020-12-22 08:25:45,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:25:45,534 INFO L481 AbstractCegarLoop]: Abstraction has 787 states and 1199 transitions. [2020-12-22 08:25:45,534 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:25:45,534 INFO L276 IsEmpty]: Start isEmpty. Operand 787 states and 1199 transitions. [2020-12-22 08:25:45,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 08:25:45,547 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:25:45,547 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] [2020-12-22 08:25:45,547 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 08:25:45,549 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:25:45,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:25:45,552 INFO L82 PathProgramCache]: Analyzing trace with hash -314049844, now seen corresponding path program 1 times [2020-12-22 08:25:45,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:25:45,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660937309] [2020-12-22 08:25:45,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:25:45,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:25:45,737 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 08:25:45,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660937309] [2020-12-22 08:25:45,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:25:45,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:25:45,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183977011] [2020-12-22 08:25:45,739 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:25:45,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:25:45,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:25:45,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:25:45,741 INFO L87 Difference]: Start difference. First operand 787 states and 1199 transitions. Second operand 6 states. [2020-12-22 08:25:46,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:25:46,351 INFO L93 Difference]: Finished difference Result 2641 states and 4082 transitions. [2020-12-22 08:25:46,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:25:46,351 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-12-22 08:25:46,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:25:46,363 INFO L225 Difference]: With dead ends: 2641 [2020-12-22 08:25:46,363 INFO L226 Difference]: Without dead ends: 1905 [2020-12-22 08:25:46,366 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-12-22 08:25:46,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1905 states. [2020-12-22 08:25:46,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1905 to 1901. [2020-12-22 08:25:46,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1901 states. [2020-12-22 08:25:46,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1901 states to 1901 states and 2928 transitions. [2020-12-22 08:25:46,515 INFO L78 Accepts]: Start accepts. Automaton has 1901 states and 2928 transitions. Word has length 67 [2020-12-22 08:25:46,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:25:46,515 INFO L481 AbstractCegarLoop]: Abstraction has 1901 states and 2928 transitions. [2020-12-22 08:25:46,515 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:25:46,516 INFO L276 IsEmpty]: Start isEmpty. Operand 1901 states and 2928 transitions. [2020-12-22 08:25:46,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 08:25:46,518 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:25:46,518 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] [2020-12-22 08:25:46,518 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 08:25:46,518 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:25:46,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:25:46,519 INFO L82 PathProgramCache]: Analyzing trace with hash -301249106, now seen corresponding path program 1 times [2020-12-22 08:25:46,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:25:46,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49756877] [2020-12-22 08:25:46,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:25:46,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:25:46,637 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 08:25:46,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49756877] [2020-12-22 08:25:46,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:25:46,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:25:46,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56174122] [2020-12-22 08:25:46,639 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:25:46,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:25:46,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:25:46,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:25:46,640 INFO L87 Difference]: Start difference. First operand 1901 states and 2928 transitions. Second operand 6 states. [2020-12-22 08:25:47,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:25:47,319 INFO L93 Difference]: Finished difference Result 6611 states and 10261 transitions. [2020-12-22 08:25:47,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:25:47,320 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-12-22 08:25:47,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:25:47,348 INFO L225 Difference]: With dead ends: 6611 [2020-12-22 08:25:47,348 INFO L226 Difference]: Without dead ends: 4811 [2020-12-22 08:25:47,353 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-12-22 08:25:47,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4811 states. [2020-12-22 08:25:47,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4811 to 4371. [2020-12-22 08:25:47,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4371 states. [2020-12-22 08:25:47,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4371 states to 4371 states and 6749 transitions. [2020-12-22 08:25:47,706 INFO L78 Accepts]: Start accepts. Automaton has 4371 states and 6749 transitions. Word has length 67 [2020-12-22 08:25:47,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:25:47,708 INFO L481 AbstractCegarLoop]: Abstraction has 4371 states and 6749 transitions. [2020-12-22 08:25:47,708 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:25:47,708 INFO L276 IsEmpty]: Start isEmpty. Operand 4371 states and 6749 transitions. [2020-12-22 08:25:47,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 08:25:47,711 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:25:47,711 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] [2020-12-22 08:25:47,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 08:25:47,711 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:25:47,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:25:47,712 INFO L82 PathProgramCache]: Analyzing trace with hash 1722644829, now seen corresponding path program 1 times [2020-12-22 08:25:47,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:25:47,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492528330] [2020-12-22 08:25:47,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:25:47,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:25:47,859 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 08:25:47,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492528330] [2020-12-22 08:25:47,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:25:47,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:25:47,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097253007] [2020-12-22 08:25:47,861 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:25:47,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:25:47,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:25:47,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:25:47,864 INFO L87 Difference]: Start difference. First operand 4371 states and 6749 transitions. Second operand 6 states. [2020-12-22 08:25:49,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:25:49,048 INFO L93 Difference]: Finished difference Result 16440 states and 25438 transitions. [2020-12-22 08:25:49,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:25:49,049 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-12-22 08:25:49,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:25:49,109 INFO L225 Difference]: With dead ends: 16440 [2020-12-22 08:25:49,109 INFO L226 Difference]: Without dead ends: 12143 [2020-12-22 08:25:49,119 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-12-22 08:25:49,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12143 states. [2020-12-22 08:25:49,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12143 to 12139. [2020-12-22 08:25:49,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12139 states. [2020-12-22 08:25:50,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12139 states to 12139 states and 18697 transitions. [2020-12-22 08:25:50,045 INFO L78 Accepts]: Start accepts. Automaton has 12139 states and 18697 transitions. Word has length 67 [2020-12-22 08:25:50,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:25:50,045 INFO L481 AbstractCegarLoop]: Abstraction has 12139 states and 18697 transitions. [2020-12-22 08:25:50,046 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:25:50,046 INFO L276 IsEmpty]: Start isEmpty. Operand 12139 states and 18697 transitions. [2020-12-22 08:25:50,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 08:25:50,048 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:25:50,049 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] [2020-12-22 08:25:50,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 08:25:50,049 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:25:50,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:25:50,050 INFO L82 PathProgramCache]: Analyzing trace with hash -262843909, now seen corresponding path program 1 times [2020-12-22 08:25:50,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:25:50,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066127168] [2020-12-22 08:25:50,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:25:50,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:25:50,140 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 08:25:50,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066127168] [2020-12-22 08:25:50,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:25:50,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:25:50,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165319685] [2020-12-22 08:25:50,142 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:25:50,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:25:50,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:25:50,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:25:50,144 INFO L87 Difference]: Start difference. First operand 12139 states and 18697 transitions. Second operand 5 states. [2020-12-22 08:25:51,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:25:51,682 INFO L93 Difference]: Finished difference Result 33385 states and 51474 transitions. [2020-12-22 08:25:51,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:25:51,683 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 67 [2020-12-22 08:25:51,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:25:51,768 INFO L225 Difference]: With dead ends: 33385 [2020-12-22 08:25:51,768 INFO L226 Difference]: Without dead ends: 21281 [2020-12-22 08:25:51,792 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:25:51,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21281 states. [2020-12-22 08:25:53,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21281 to 21279. [2020-12-22 08:25:53,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21279 states. [2020-12-22 08:25:53,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21279 states to 21279 states and 32471 transitions. [2020-12-22 08:25:53,421 INFO L78 Accepts]: Start accepts. Automaton has 21279 states and 32471 transitions. Word has length 67 [2020-12-22 08:25:53,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:25:53,422 INFO L481 AbstractCegarLoop]: Abstraction has 21279 states and 32471 transitions. [2020-12-22 08:25:53,422 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:25:53,422 INFO L276 IsEmpty]: Start isEmpty. Operand 21279 states and 32471 transitions. [2020-12-22 08:25:53,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 08:25:53,425 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:25:53,427 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] [2020-12-22 08:25:53,427 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 08:25:53,428 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:25:53,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:25:53,431 INFO L82 PathProgramCache]: Analyzing trace with hash -767077788, now seen corresponding path program 1 times [2020-12-22 08:25:53,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:25:53,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217992868] [2020-12-22 08:25:53,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:25:53,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:25:53,564 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 08:25:53,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217992868] [2020-12-22 08:25:53,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:25:53,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:25:53,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754098413] [2020-12-22 08:25:53,567 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:25:53,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:25:53,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:25:53,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:25:53,570 INFO L87 Difference]: Start difference. First operand 21279 states and 32471 transitions. Second operand 5 states. [2020-12-22 08:25:55,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:25:55,663 INFO L93 Difference]: Finished difference Result 39062 states and 59286 transitions. [2020-12-22 08:25:55,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:25:55,664 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 68 [2020-12-22 08:25:55,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:25:55,780 INFO L225 Difference]: With dead ends: 39062 [2020-12-22 08:25:55,780 INFO L226 Difference]: Without dead ends: 39060 [2020-12-22 08:25:55,794 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:25:55,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39060 states. [2020-12-22 08:25:57,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39060 to 21621. [2020-12-22 08:25:57,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21621 states. [2020-12-22 08:25:57,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21621 states to 21621 states and 32813 transitions. [2020-12-22 08:25:57,324 INFO L78 Accepts]: Start accepts. Automaton has 21621 states and 32813 transitions. Word has length 68 [2020-12-22 08:25:57,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:25:57,325 INFO L481 AbstractCegarLoop]: Abstraction has 21621 states and 32813 transitions. [2020-12-22 08:25:57,325 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:25:57,325 INFO L276 IsEmpty]: Start isEmpty. Operand 21621 states and 32813 transitions. [2020-12-22 08:25:57,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-22 08:25:57,330 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:25:57,330 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] [2020-12-22 08:25:57,331 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 08:25:57,331 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:25:57,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:25:57,331 INFO L82 PathProgramCache]: Analyzing trace with hash -2026121149, now seen corresponding path program 1 times [2020-12-22 08:25:57,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:25:57,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238813486] [2020-12-22 08:25:57,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:25:57,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:25:57,456 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 08:25:57,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238813486] [2020-12-22 08:25:57,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:25:57,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:25:57,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395036412] [2020-12-22 08:25:57,458 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:25:57,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:25:57,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:25:57,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:25:57,459 INFO L87 Difference]: Start difference. First operand 21621 states and 32813 transitions. Second operand 4 states. [2020-12-22 08:25:59,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:25:59,538 INFO L93 Difference]: Finished difference Result 59935 states and 90604 transitions. [2020-12-22 08:25:59,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:25:59,538 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 69 [2020-12-22 08:25:59,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:25:59,612 INFO L225 Difference]: With dead ends: 59935 [2020-12-22 08:25:59,612 INFO L226 Difference]: Without dead ends: 39209 [2020-12-22 08:25:59,643 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:25:59,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39209 states. [2020-12-22 08:26:01,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39209 to 39207. [2020-12-22 08:26:01,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39207 states. [2020-12-22 08:26:02,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39207 states to 39207 states and 58883 transitions. [2020-12-22 08:26:02,024 INFO L78 Accepts]: Start accepts. Automaton has 39207 states and 58883 transitions. Word has length 69 [2020-12-22 08:26:02,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:26:02,025 INFO L481 AbstractCegarLoop]: Abstraction has 39207 states and 58883 transitions. [2020-12-22 08:26:02,025 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:26:02,025 INFO L276 IsEmpty]: Start isEmpty. Operand 39207 states and 58883 transitions. [2020-12-22 08:26:02,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 08:26:02,029 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:26:02,030 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] [2020-12-22 08:26:02,030 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 08:26:02,030 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:26:02,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:26:02,031 INFO L82 PathProgramCache]: Analyzing trace with hash -304742627, now seen corresponding path program 1 times [2020-12-22 08:26:02,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:26:02,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966619233] [2020-12-22 08:26:02,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:26:02,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:26:02,090 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 08:26:02,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966619233] [2020-12-22 08:26:02,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:26:02,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:26:02,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349503726] [2020-12-22 08:26:02,096 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:26:02,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:26:02,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:26:02,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:26:02,098 INFO L87 Difference]: Start difference. First operand 39207 states and 58883 transitions. Second operand 3 states. [2020-12-22 08:26:04,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:26:04,761 INFO L93 Difference]: Finished difference Result 74578 states and 112010 transitions. [2020-12-22 08:26:04,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:26:04,762 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 70 [2020-12-22 08:26:04,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:26:04,851 INFO L225 Difference]: With dead ends: 74578 [2020-12-22 08:26:04,851 INFO L226 Difference]: Without dead ends: 51876 [2020-12-22 08:26:04,899 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 08:26:04,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51876 states. [2020-12-22 08:26:08,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51876 to 51139. [2020-12-22 08:26:08,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51139 states. [2020-12-22 08:26:08,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51139 states to 51139 states and 75805 transitions. [2020-12-22 08:26:08,138 INFO L78 Accepts]: Start accepts. Automaton has 51139 states and 75805 transitions. Word has length 70 [2020-12-22 08:26:08,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:26:08,139 INFO L481 AbstractCegarLoop]: Abstraction has 51139 states and 75805 transitions. [2020-12-22 08:26:08,139 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:26:08,139 INFO L276 IsEmpty]: Start isEmpty. Operand 51139 states and 75805 transitions. [2020-12-22 08:26:08,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 08:26:08,143 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:26:08,143 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] [2020-12-22 08:26:08,144 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 08:26:08,144 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:26:08,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:26:08,144 INFO L82 PathProgramCache]: Analyzing trace with hash 1483743676, now seen corresponding path program 1 times [2020-12-22 08:26:08,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:26:08,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818821447] [2020-12-22 08:26:08,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:26:08,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:26:08,201 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 08:26:08,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818821447] [2020-12-22 08:26:08,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:26:08,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:26:08,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349675408] [2020-12-22 08:26:08,202 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:26:08,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:26:08,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:26:08,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:26:08,203 INFO L87 Difference]: Start difference. First operand 51139 states and 75805 transitions. Second operand 3 states. [2020-12-22 08:26:11,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:26:11,225 INFO L93 Difference]: Finished difference Result 73586 states and 108632 transitions. [2020-12-22 08:26:11,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:26:11,225 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 70 [2020-12-22 08:26:11,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:26:11,307 INFO L225 Difference]: With dead ends: 73586 [2020-12-22 08:26:11,307 INFO L226 Difference]: Without dead ends: 58540 [2020-12-22 08:26:11,328 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 08:26:11,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58540 states. [2020-12-22 08:26:14,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58540 to 54638. [2020-12-22 08:26:14,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54638 states. [2020-12-22 08:26:14,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54638 states to 54638 states and 79737 transitions. [2020-12-22 08:26:14,482 INFO L78 Accepts]: Start accepts. Automaton has 54638 states and 79737 transitions. Word has length 70 [2020-12-22 08:26:14,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:26:14,482 INFO L481 AbstractCegarLoop]: Abstraction has 54638 states and 79737 transitions. [2020-12-22 08:26:14,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:26:14,482 INFO L276 IsEmpty]: Start isEmpty. Operand 54638 states and 79737 transitions. [2020-12-22 08:26:14,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 08:26:14,487 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:26:14,487 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] [2020-12-22 08:26:14,487 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 08:26:14,487 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:26:14,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:26:14,488 INFO L82 PathProgramCache]: Analyzing trace with hash 44551324, now seen corresponding path program 1 times [2020-12-22 08:26:14,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:26:14,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661999885] [2020-12-22 08:26:14,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:26:14,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:26:14,570 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 08:26:14,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661999885] [2020-12-22 08:26:14,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:26:14,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:26:14,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424343797] [2020-12-22 08:26:14,571 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:26:14,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:26:14,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:26:14,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:26:14,572 INFO L87 Difference]: Start difference. First operand 54638 states and 79737 transitions. Second operand 6 states. [2020-12-22 08:26:23,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:26:23,065 INFO L93 Difference]: Finished difference Result 196171 states and 285687 transitions. [2020-12-22 08:26:23,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:26:23,066 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 70 [2020-12-22 08:26:23,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:26:23,329 INFO L225 Difference]: With dead ends: 196171 [2020-12-22 08:26:23,329 INFO L226 Difference]: Without dead ends: 147664 [2020-12-22 08:26:23,389 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 08:26:23,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147664 states. [2020-12-22 08:26:28,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147664 to 77557. [2020-12-22 08:26:28,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77557 states. [2020-12-22 08:26:29,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77557 states to 77557 states and 112875 transitions. [2020-12-22 08:26:29,003 INFO L78 Accepts]: Start accepts. Automaton has 77557 states and 112875 transitions. Word has length 70 [2020-12-22 08:26:29,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:26:29,003 INFO L481 AbstractCegarLoop]: Abstraction has 77557 states and 112875 transitions. [2020-12-22 08:26:29,003 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:26:29,003 INFO L276 IsEmpty]: Start isEmpty. Operand 77557 states and 112875 transitions. [2020-12-22 08:26:29,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 08:26:29,008 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:26:29,008 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] [2020-12-22 08:26:29,008 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 08:26:29,008 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:26:29,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:26:29,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1768892355, now seen corresponding path program 1 times [2020-12-22 08:26:29,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:26:29,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783227934] [2020-12-22 08:26:29,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:26:29,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:26:29,060 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 08:26:29,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783227934] [2020-12-22 08:26:29,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:26:29,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:26:29,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906223357] [2020-12-22 08:26:29,061 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:26:29,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:26:29,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:26:29,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:26:29,062 INFO L87 Difference]: Start difference. First operand 77557 states and 112875 transitions. Second operand 3 states. [2020-12-22 08:26:36,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:26:36,240 INFO L93 Difference]: Finished difference Result 175179 states and 254698 transitions. [2020-12-22 08:26:36,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:26:36,240 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 70 [2020-12-22 08:26:36,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:26:36,418 INFO L225 Difference]: With dead ends: 175179 [2020-12-22 08:26:36,418 INFO L226 Difference]: Without dead ends: 105740 [2020-12-22 08:26:36,474 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 08:26:36,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105740 states. [2020-12-22 08:26:43,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105740 to 105405. [2020-12-22 08:26:43,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105405 states. [2020-12-22 08:26:43,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105405 states to 105405 states and 151059 transitions. [2020-12-22 08:26:43,867 INFO L78 Accepts]: Start accepts. Automaton has 105405 states and 151059 transitions. Word has length 70 [2020-12-22 08:26:43,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:26:43,867 INFO L481 AbstractCegarLoop]: Abstraction has 105405 states and 151059 transitions. [2020-12-22 08:26:43,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:26:43,868 INFO L276 IsEmpty]: Start isEmpty. Operand 105405 states and 151059 transitions. [2020-12-22 08:26:43,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 08:26:43,884 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:26:43,884 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] [2020-12-22 08:26:43,884 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 08:26:43,884 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:26:43,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:26:43,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1753930236, now seen corresponding path program 1 times [2020-12-22 08:26:43,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:26:43,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944498323] [2020-12-22 08:26:43,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:26:43,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:26:44,001 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 08:26:44,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944498323] [2020-12-22 08:26:44,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:26:44,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:26:44,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751473079] [2020-12-22 08:26:44,003 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:26:44,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:26:44,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:26:44,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:26:44,004 INFO L87 Difference]: Start difference. First operand 105405 states and 151059 transitions. Second operand 6 states. [2020-12-22 08:27:00,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:27:00,028 INFO L93 Difference]: Finished difference Result 263988 states and 379051 transitions. [2020-12-22 08:27:00,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:27:00,028 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 70 [2020-12-22 08:27:00,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:27:00,640 INFO L225 Difference]: With dead ends: 263988 [2020-12-22 08:27:00,640 INFO L226 Difference]: Without dead ends: 243988 [2020-12-22 08:27:00,719 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-12-22 08:27:00,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243988 states. [2020-12-22 08:27:10,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243988 to 126003. [2020-12-22 08:27:10,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126003 states. [2020-12-22 08:27:11,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126003 states to 126003 states and 180528 transitions. [2020-12-22 08:27:11,373 INFO L78 Accepts]: Start accepts. Automaton has 126003 states and 180528 transitions. Word has length 70 [2020-12-22 08:27:11,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:27:11,373 INFO L481 AbstractCegarLoop]: Abstraction has 126003 states and 180528 transitions. [2020-12-22 08:27:11,374 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:27:11,374 INFO L276 IsEmpty]: Start isEmpty. Operand 126003 states and 180528 transitions. [2020-12-22 08:27:11,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 08:27:11,381 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:27:11,381 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] [2020-12-22 08:27:11,381 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 08:27:11,381 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:27:11,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:27:11,392 INFO L82 PathProgramCache]: Analyzing trace with hash -1600159939, now seen corresponding path program 1 times [2020-12-22 08:27:11,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:27:11,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707938861] [2020-12-22 08:27:11,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:27:11,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:27:11,480 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 08:27:11,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707938861] [2020-12-22 08:27:11,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:27:11,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:27:11,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223468108] [2020-12-22 08:27:11,482 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:27:11,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:27:11,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:27:11,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:27:11,483 INFO L87 Difference]: Start difference. First operand 126003 states and 180528 transitions. Second operand 6 states. [2020-12-22 08:27:29,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:27:29,034 INFO L93 Difference]: Finished difference Result 284724 states and 408652 transitions. [2020-12-22 08:27:29,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:27:29,035 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 70 [2020-12-22 08:27:29,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:27:29,679 INFO L225 Difference]: With dead ends: 284724 [2020-12-22 08:27:29,679 INFO L226 Difference]: Without dead ends: 248011 [2020-12-22 08:27:29,757 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-12-22 08:27:29,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248011 states. [2020-12-22 08:27:41,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248011 to 142367. [2020-12-22 08:27:41,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142367 states. [2020-12-22 08:27:42,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142367 states to 142367 states and 204274 transitions. [2020-12-22 08:27:42,070 INFO L78 Accepts]: Start accepts. Automaton has 142367 states and 204274 transitions. Word has length 70 [2020-12-22 08:27:42,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:27:42,071 INFO L481 AbstractCegarLoop]: Abstraction has 142367 states and 204274 transitions. [2020-12-22 08:27:42,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:27:42,071 INFO L276 IsEmpty]: Start isEmpty. Operand 142367 states and 204274 transitions. [2020-12-22 08:27:42,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 08:27:42,076 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:27:42,076 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] [2020-12-22 08:27:42,076 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 08:27:42,076 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:27:42,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:27:42,077 INFO L82 PathProgramCache]: Analyzing trace with hash 740233245, now seen corresponding path program 1 times [2020-12-22 08:27:42,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:27:42,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687297299] [2020-12-22 08:27:42,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:27:42,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:27:42,211 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 08:27:42,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687297299] [2020-12-22 08:27:42,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:27:42,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:27:42,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388755214] [2020-12-22 08:27:42,212 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:27:42,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:27:42,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:27:42,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:27:42,214 INFO L87 Difference]: Start difference. First operand 142367 states and 204274 transitions. Second operand 6 states. [2020-12-22 08:28:01,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:28:01,839 INFO L93 Difference]: Finished difference Result 304889 states and 437747 transitions. [2020-12-22 08:28:01,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:28:01,840 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 70 [2020-12-22 08:28:01,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:28:02,452 INFO L225 Difference]: With dead ends: 304889 [2020-12-22 08:28:02,452 INFO L226 Difference]: Without dead ends: 243394 [2020-12-22 08:28:02,550 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 08:28:02,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243394 states.