/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.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 09:10:17,883 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 09:10:17,886 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 09:10:17,940 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 09:10:17,941 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 09:10:17,945 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 09:10:17,949 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 09:10:17,957 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 09:10:17,960 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 09:10:17,966 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 09:10:17,967 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 09:10:17,969 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 09:10:17,969 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 09:10:17,973 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 09:10:17,977 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 09:10:17,979 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 09:10:17,992 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 09:10:17,995 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 09:10:18,002 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 09:10:18,010 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 09:10:18,012 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 09:10:18,014 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 09:10:18,016 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 09:10:18,018 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 09:10:18,026 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 09:10:18,038 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 09:10:18,039 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 09:10:18,040 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 09:10:18,045 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 09:10:18,100 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 09:10:18,100 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 09:10:18,107 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 09:10:18,107 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 09:10:18,107 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 09:10:18,108 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 09:10:18,108 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 09:10:18,109 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 09:10:18,109 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 09:10:18,109 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 09:10:18,110 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 09:10:18,111 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 09:10:18,111 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 09:10:18,111 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 09:10:18,111 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 09:10:18,112 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 09:10:18,112 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 09:10:18,112 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:10:18,112 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 09:10:18,113 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 09:10:18,113 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 09:10:18,113 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 09:10:18,113 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 09:10:18,113 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 09:10:18,114 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 09:10:18,114 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 09:10:18,551 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 09:10:18,592 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 09:10:18,596 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 09:10:18,597 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 09:10:18,598 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 09:10:18,599 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-12-22 09:10:18,686 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/509cc4823/44818d92c8cb4e1ca16d22064970f929/FLAGa670179e8 [2020-12-22 09:10:19,361 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 09:10:19,361 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-12-22 09:10:19,380 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/509cc4823/44818d92c8cb4e1ca16d22064970f929/FLAGa670179e8 [2020-12-22 09:10:19,617 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/509cc4823/44818d92c8cb4e1ca16d22064970f929 [2020-12-22 09:10:19,621 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 09:10:19,623 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 09:10:19,627 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 09:10:19,628 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 09:10:19,632 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 09:10:19,634 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:10:19" (1/1) ... [2020-12-22 09:10:19,636 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c43f02f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:10:19, skipping insertion in model container [2020-12-22 09:10:19,636 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:10:19" (1/1) ... [2020-12-22 09:10:19,645 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 09:10:19,732 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 09:10:20,033 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.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[13463,13476] [2020-12-22 09:10:20,136 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:10:20,166 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 09:10:20,335 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.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[13463,13476] [2020-12-22 09:10:20,404 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:10:20,429 INFO L208 MainTranslator]: Completed translation [2020-12-22 09:10:20,430 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:10:20 WrapperNode [2020-12-22 09:10:20,430 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 09:10:20,431 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 09:10:20,431 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 09:10:20,432 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 09:10:20,440 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:10:20" (1/1) ... [2020-12-22 09:10:20,460 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:10:20" (1/1) ... [2020-12-22 09:10:20,536 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 09:10:20,537 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 09:10:20,537 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 09:10:20,537 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 09:10:20,547 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:10:20" (1/1) ... [2020-12-22 09:10:20,548 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:10:20" (1/1) ... [2020-12-22 09:10:20,557 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:10:20" (1/1) ... [2020-12-22 09:10:20,558 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:10:20" (1/1) ... [2020-12-22 09:10:20,577 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:10:20" (1/1) ... [2020-12-22 09:10:20,592 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:10:20" (1/1) ... [2020-12-22 09:10:20,599 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:10:20" (1/1) ... [2020-12-22 09:10:20,609 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 09:10:20,610 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 09:10:20,610 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 09:10:20,610 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 09:10:20,611 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:10:20" (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 09:10:20,731 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 09:10:20,732 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 09:10:20,732 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 09:10:20,733 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 09:10:22,227 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 09:10:22,228 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 09:10:22,230 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:10:22 BoogieIcfgContainer [2020-12-22 09:10:22,230 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 09:10:22,232 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 09:10:22,232 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 09:10:22,235 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 09:10:22,235 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:10:19" (1/3) ... [2020-12-22 09:10:22,236 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36597b7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:10:22, skipping insertion in model container [2020-12-22 09:10:22,236 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:10:20" (2/3) ... [2020-12-22 09:10:22,237 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36597b7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:10:22, skipping insertion in model container [2020-12-22 09:10:22,237 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:10:22" (3/3) ... [2020-12-22 09:10:22,239 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-12-22 09:10:22,245 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 09:10:22,251 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 09:10:22,272 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 09:10:22,303 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 09:10:22,304 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 09:10:22,304 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 09:10:22,304 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 09:10:22,304 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 09:10:22,304 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 09:10:22,304 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 09:10:22,305 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 09:10:22,327 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states. [2020-12-22 09:10:22,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-12-22 09:10:22,344 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:10:22,345 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] [2020-12-22 09:10:22,346 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:10:22,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:10:22,352 INFO L82 PathProgramCache]: Analyzing trace with hash -799681112, now seen corresponding path program 1 times [2020-12-22 09:10:22,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:10:22,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895792613] [2020-12-22 09:10:22,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:10:22,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:10:22,994 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 09:10:22,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895792613] [2020-12-22 09:10:22,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:10:22,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:10:22,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239748257] [2020-12-22 09:10:23,002 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:10:23,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:10:23,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:10:23,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:10:23,021 INFO L87 Difference]: Start difference. First operand 351 states. Second operand 3 states. [2020-12-22 09:10:23,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:10:23,227 INFO L93 Difference]: Finished difference Result 655 states and 1130 transitions. [2020-12-22 09:10:23,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:10:23,230 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 118 [2020-12-22 09:10:23,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:10:23,251 INFO L225 Difference]: With dead ends: 655 [2020-12-22 09:10:23,251 INFO L226 Difference]: Without dead ends: 491 [2020-12-22 09:10:23,256 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 09:10:23,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2020-12-22 09:10:23,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 488. [2020-12-22 09:10:23,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 488 states. [2020-12-22 09:10:23,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 805 transitions. [2020-12-22 09:10:23,378 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 805 transitions. Word has length 118 [2020-12-22 09:10:23,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:10:23,379 INFO L481 AbstractCegarLoop]: Abstraction has 488 states and 805 transitions. [2020-12-22 09:10:23,379 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:10:23,379 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 805 transitions. [2020-12-22 09:10:23,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-12-22 09:10:23,384 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:10:23,384 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] [2020-12-22 09:10:23,384 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 09:10:23,385 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:10:23,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:10:23,386 INFO L82 PathProgramCache]: Analyzing trace with hash 103897476, now seen corresponding path program 1 times [2020-12-22 09:10:23,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:10:23,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150657084] [2020-12-22 09:10:23,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:10:23,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:10:23,633 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 09:10:23,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150657084] [2020-12-22 09:10:23,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:10:23,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:10:23,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679595249] [2020-12-22 09:10:23,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:10:23,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:10:23,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:10:23,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:10:23,638 INFO L87 Difference]: Start difference. First operand 488 states and 805 transitions. Second operand 3 states. [2020-12-22 09:10:23,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:10:23,752 INFO L93 Difference]: Finished difference Result 1058 states and 1753 transitions. [2020-12-22 09:10:23,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:10:23,753 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 121 [2020-12-22 09:10:23,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:10:23,761 INFO L225 Difference]: With dead ends: 1058 [2020-12-22 09:10:23,762 INFO L226 Difference]: Without dead ends: 763 [2020-12-22 09:10:23,768 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 09:10:23,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 763 states. [2020-12-22 09:10:23,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 763 to 759. [2020-12-22 09:10:23,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 759 states. [2020-12-22 09:10:23,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 1254 transitions. [2020-12-22 09:10:23,834 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 1254 transitions. Word has length 121 [2020-12-22 09:10:23,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:10:23,836 INFO L481 AbstractCegarLoop]: Abstraction has 759 states and 1254 transitions. [2020-12-22 09:10:23,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:10:23,837 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 1254 transitions. [2020-12-22 09:10:23,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-12-22 09:10:23,846 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:10:23,846 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] [2020-12-22 09:10:23,846 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 09:10:23,847 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:10:23,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:10:23,851 INFO L82 PathProgramCache]: Analyzing trace with hash 397712831, now seen corresponding path program 1 times [2020-12-22 09:10:23,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:10:23,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036036616] [2020-12-22 09:10:23,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:10:23,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:10:24,028 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 09:10:24,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036036616] [2020-12-22 09:10:24,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:10:24,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:10:24,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004135091] [2020-12-22 09:10:24,031 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:10:24,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:10:24,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:10:24,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:10:24,035 INFO L87 Difference]: Start difference. First operand 759 states and 1254 transitions. Second operand 3 states. [2020-12-22 09:10:24,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:10:24,117 INFO L93 Difference]: Finished difference Result 1851 states and 3064 transitions. [2020-12-22 09:10:24,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:10:24,118 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 124 [2020-12-22 09:10:24,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:10:24,130 INFO L225 Difference]: With dead ends: 1851 [2020-12-22 09:10:24,130 INFO L226 Difference]: Without dead ends: 1285 [2020-12-22 09:10:24,131 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 09:10:24,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1285 states. [2020-12-22 09:10:24,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1285 to 1279. [2020-12-22 09:10:24,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1279 states. [2020-12-22 09:10:24,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1279 states to 1279 states and 2110 transitions. [2020-12-22 09:10:24,197 INFO L78 Accepts]: Start accepts. Automaton has 1279 states and 2110 transitions. Word has length 124 [2020-12-22 09:10:24,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:10:24,205 INFO L481 AbstractCegarLoop]: Abstraction has 1279 states and 2110 transitions. [2020-12-22 09:10:24,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:10:24,206 INFO L276 IsEmpty]: Start isEmpty. Operand 1279 states and 2110 transitions. [2020-12-22 09:10:24,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-12-22 09:10:24,209 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:10:24,209 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] [2020-12-22 09:10:24,209 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 09:10:24,209 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:10:24,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:10:24,211 INFO L82 PathProgramCache]: Analyzing trace with hash 431510401, now seen corresponding path program 1 times [2020-12-22 09:10:24,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:10:24,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382443403] [2020-12-22 09:10:24,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:10:24,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:10:24,410 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 09:10:24,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382443403] [2020-12-22 09:10:24,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:10:24,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:10:24,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699601384] [2020-12-22 09:10:24,412 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:10:24,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:10:24,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:10:24,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:10:24,413 INFO L87 Difference]: Start difference. First operand 1279 states and 2110 transitions. Second operand 3 states. [2020-12-22 09:10:24,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:10:24,546 INFO L93 Difference]: Finished difference Result 3371 states and 5560 transitions. [2020-12-22 09:10:24,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:10:24,547 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 127 [2020-12-22 09:10:24,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:10:24,560 INFO L225 Difference]: With dead ends: 3371 [2020-12-22 09:10:24,560 INFO L226 Difference]: Without dead ends: 2285 [2020-12-22 09:10:24,563 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 09:10:24,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2020-12-22 09:10:24,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 2275. [2020-12-22 09:10:24,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2275 states. [2020-12-22 09:10:24,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2275 states to 2275 states and 3730 transitions. [2020-12-22 09:10:24,684 INFO L78 Accepts]: Start accepts. Automaton has 2275 states and 3730 transitions. Word has length 127 [2020-12-22 09:10:24,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:10:24,685 INFO L481 AbstractCegarLoop]: Abstraction has 2275 states and 3730 transitions. [2020-12-22 09:10:24,685 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:10:24,685 INFO L276 IsEmpty]: Start isEmpty. Operand 2275 states and 3730 transitions. [2020-12-22 09:10:24,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-22 09:10:24,687 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:10:24,688 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] [2020-12-22 09:10:24,688 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 09:10:24,688 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:10:24,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:10:24,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1348551006, now seen corresponding path program 1 times [2020-12-22 09:10:24,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:10:24,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346187216] [2020-12-22 09:10:24,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:10:24,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:10:25,074 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 09:10:25,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346187216] [2020-12-22 09:10:25,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:10:25,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:10:25,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022065495] [2020-12-22 09:10:25,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:10:25,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:10:25,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:10:25,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:10:25,078 INFO L87 Difference]: Start difference. First operand 2275 states and 3730 transitions. Second operand 6 states. [2020-12-22 09:10:26,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:10:26,158 INFO L93 Difference]: Finished difference Result 11927 states and 19706 transitions. [2020-12-22 09:10:26,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 09:10:26,161 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 130 [2020-12-22 09:10:26,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:10:26,212 INFO L225 Difference]: With dead ends: 11927 [2020-12-22 09:10:26,212 INFO L226 Difference]: Without dead ends: 9845 [2020-12-22 09:10:26,220 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:10:26,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9845 states. [2020-12-22 09:10:26,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9845 to 4220. [2020-12-22 09:10:26,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4220 states. [2020-12-22 09:10:26,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4220 states to 4220 states and 6920 transitions. [2020-12-22 09:10:26,586 INFO L78 Accepts]: Start accepts. Automaton has 4220 states and 6920 transitions. Word has length 130 [2020-12-22 09:10:26,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:10:26,586 INFO L481 AbstractCegarLoop]: Abstraction has 4220 states and 6920 transitions. [2020-12-22 09:10:26,586 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:10:26,586 INFO L276 IsEmpty]: Start isEmpty. Operand 4220 states and 6920 transitions. [2020-12-22 09:10:26,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-12-22 09:10:26,590 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:10:26,590 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] [2020-12-22 09:10:26,591 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 09:10:26,591 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:10:26,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:10:26,591 INFO L82 PathProgramCache]: Analyzing trace with hash 1077529784, now seen corresponding path program 1 times [2020-12-22 09:10:26,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:10:26,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108968687] [2020-12-22 09:10:26,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:10:26,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:10:26,763 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 09:10:26,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108968687] [2020-12-22 09:10:26,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:10:26,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:10:26,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268060390] [2020-12-22 09:10:26,765 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:10:26,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:10:26,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:10:26,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:10:26,766 INFO L87 Difference]: Start difference. First operand 4220 states and 6920 transitions. Second operand 4 states. [2020-12-22 09:10:27,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:10:27,382 INFO L93 Difference]: Finished difference Result 12379 states and 20401 transitions. [2020-12-22 09:10:27,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:10:27,382 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 131 [2020-12-22 09:10:27,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:10:27,430 INFO L225 Difference]: With dead ends: 12379 [2020-12-22 09:10:27,430 INFO L226 Difference]: Without dead ends: 8352 [2020-12-22 09:10:27,438 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 09:10:27,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8352 states. [2020-12-22 09:10:27,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8352 to 6269. [2020-12-22 09:10:27,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6269 states. [2020-12-22 09:10:27,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6269 states to 6269 states and 10296 transitions. [2020-12-22 09:10:27,962 INFO L78 Accepts]: Start accepts. Automaton has 6269 states and 10296 transitions. Word has length 131 [2020-12-22 09:10:27,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:10:27,962 INFO L481 AbstractCegarLoop]: Abstraction has 6269 states and 10296 transitions. [2020-12-22 09:10:27,962 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:10:27,963 INFO L276 IsEmpty]: Start isEmpty. Operand 6269 states and 10296 transitions. [2020-12-22 09:10:27,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-12-22 09:10:27,967 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:10:27,967 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] [2020-12-22 09:10:27,968 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 09:10:27,968 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:10:27,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:10:27,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1018819031, now seen corresponding path program 1 times [2020-12-22 09:10:27,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:10:27,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698436340] [2020-12-22 09:10:27,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:10:28,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:10:28,199 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 09:10:28,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698436340] [2020-12-22 09:10:28,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:10:28,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:10:28,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439798172] [2020-12-22 09:10:28,201 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:10:28,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:10:28,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:10:28,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:10:28,202 INFO L87 Difference]: Start difference. First operand 6269 states and 10296 transitions. Second operand 4 states. [2020-12-22 09:10:29,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:10:29,106 INFO L93 Difference]: Finished difference Result 18421 states and 30329 transitions. [2020-12-22 09:10:29,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:10:29,107 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 132 [2020-12-22 09:10:29,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:10:29,156 INFO L225 Difference]: With dead ends: 18421 [2020-12-22 09:10:29,157 INFO L226 Difference]: Without dead ends: 12345 [2020-12-22 09:10:29,172 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 09:10:29,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12345 states. [2020-12-22 09:10:29,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12345 to 9283. [2020-12-22 09:10:29,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9283 states. [2020-12-22 09:10:29,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9283 states to 9283 states and 15232 transitions. [2020-12-22 09:10:29,990 INFO L78 Accepts]: Start accepts. Automaton has 9283 states and 15232 transitions. Word has length 132 [2020-12-22 09:10:29,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:10:29,990 INFO L481 AbstractCegarLoop]: Abstraction has 9283 states and 15232 transitions. [2020-12-22 09:10:29,990 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:10:29,990 INFO L276 IsEmpty]: Start isEmpty. Operand 9283 states and 15232 transitions. [2020-12-22 09:10:29,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-12-22 09:10:29,997 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:10:29,998 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] [2020-12-22 09:10:29,998 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 09:10:29,998 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:10:29,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:10:29,999 INFO L82 PathProgramCache]: Analyzing trace with hash -1576564833, now seen corresponding path program 1 times [2020-12-22 09:10:29,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:10:30,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200959085] [2020-12-22 09:10:30,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:10:30,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:10:30,229 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 09:10:30,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200959085] [2020-12-22 09:10:30,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:10:30,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:10:30,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963357822] [2020-12-22 09:10:30,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:10:30,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:10:30,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:10:30,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:10:30,232 INFO L87 Difference]: Start difference. First operand 9283 states and 15232 transitions. Second operand 4 states. [2020-12-22 09:10:31,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:10:31,410 INFO L93 Difference]: Finished difference Result 27309 states and 44917 transitions. [2020-12-22 09:10:31,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:10:31,410 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 133 [2020-12-22 09:10:31,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:10:31,465 INFO L225 Difference]: With dead ends: 27309 [2020-12-22 09:10:31,465 INFO L226 Difference]: Without dead ends: 18219 [2020-12-22 09:10:31,483 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 09:10:31,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18219 states. [2020-12-22 09:10:32,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18219 to 13717. [2020-12-22 09:10:32,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13717 states. [2020-12-22 09:10:32,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13717 states to 13717 states and 22486 transitions. [2020-12-22 09:10:32,414 INFO L78 Accepts]: Start accepts. Automaton has 13717 states and 22486 transitions. Word has length 133 [2020-12-22 09:10:32,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:10:32,415 INFO L481 AbstractCegarLoop]: Abstraction has 13717 states and 22486 transitions. [2020-12-22 09:10:32,415 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:10:32,415 INFO L276 IsEmpty]: Start isEmpty. Operand 13717 states and 22486 transitions. [2020-12-22 09:10:32,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-12-22 09:10:32,421 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:10:32,422 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] [2020-12-22 09:10:32,422 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 09:10:32,422 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:10:32,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:10:32,423 INFO L82 PathProgramCache]: Analyzing trace with hash -1092997201, now seen corresponding path program 1 times [2020-12-22 09:10:32,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:10:32,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377480274] [2020-12-22 09:10:32,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:10:32,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:10:32,526 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 09:10:32,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377480274] [2020-12-22 09:10:32,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:10:32,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:10:32,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495822154] [2020-12-22 09:10:32,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:10:32,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:10:32,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:10:32,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:10:32,632 INFO L87 Difference]: Start difference. First operand 13717 states and 22486 transitions. Second operand 3 states. [2020-12-22 09:10:33,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:10:33,669 INFO L93 Difference]: Finished difference Result 30564 states and 50300 transitions. [2020-12-22 09:10:33,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:10:33,670 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 134 [2020-12-22 09:10:33,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:10:33,717 INFO L225 Difference]: With dead ends: 30564 [2020-12-22 09:10:33,717 INFO L226 Difference]: Without dead ends: 21069 [2020-12-22 09:10:33,735 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 09:10:33,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21069 states. [2020-12-22 09:10:34,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21069 to 21067. [2020-12-22 09:10:34,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21067 states. [2020-12-22 09:10:34,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21067 states to 21067 states and 34520 transitions. [2020-12-22 09:10:34,903 INFO L78 Accepts]: Start accepts. Automaton has 21067 states and 34520 transitions. Word has length 134 [2020-12-22 09:10:34,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:10:34,903 INFO L481 AbstractCegarLoop]: Abstraction has 21067 states and 34520 transitions. [2020-12-22 09:10:34,903 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:10:34,904 INFO L276 IsEmpty]: Start isEmpty. Operand 21067 states and 34520 transitions. [2020-12-22 09:10:34,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-12-22 09:10:34,907 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:10:34,907 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] [2020-12-22 09:10:34,907 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 09:10:34,907 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:10:34,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:10:34,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1957895025, now seen corresponding path program 1 times [2020-12-22 09:10:34,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:10:34,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195568198] [2020-12-22 09:10:34,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:10:34,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:10:34,989 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 09:10:34,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195568198] [2020-12-22 09:10:34,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:10:34,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:10:34,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320735886] [2020-12-22 09:10:34,990 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:10:34,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:10:34,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:10:34,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:10:34,991 INFO L87 Difference]: Start difference. First operand 21067 states and 34520 transitions. Second operand 3 states. [2020-12-22 09:10:36,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:10:36,725 INFO L93 Difference]: Finished difference Result 46560 states and 76368 transitions. [2020-12-22 09:10:36,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:10:36,726 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 134 [2020-12-22 09:10:36,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:10:36,809 INFO L225 Difference]: With dead ends: 46560 [2020-12-22 09:10:36,809 INFO L226 Difference]: Without dead ends: 32027 [2020-12-22 09:10:36,834 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 09:10:36,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32027 states. [2020-12-22 09:10:38,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32027 to 32025. [2020-12-22 09:10:38,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32025 states. [2020-12-22 09:10:38,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32025 states to 32025 states and 52321 transitions. [2020-12-22 09:10:38,749 INFO L78 Accepts]: Start accepts. Automaton has 32025 states and 52321 transitions. Word has length 134 [2020-12-22 09:10:38,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:10:38,750 INFO L481 AbstractCegarLoop]: Abstraction has 32025 states and 52321 transitions. [2020-12-22 09:10:38,750 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:10:38,750 INFO L276 IsEmpty]: Start isEmpty. Operand 32025 states and 52321 transitions. [2020-12-22 09:10:38,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-12-22 09:10:38,752 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:10:38,753 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] [2020-12-22 09:10:38,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 09:10:38,753 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:10:38,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:10:38,754 INFO L82 PathProgramCache]: Analyzing trace with hash -1682257488, now seen corresponding path program 1 times [2020-12-22 09:10:38,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:10:38,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379536250] [2020-12-22 09:10:38,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:10:38,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:10:38,871 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 09:10:38,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379536250] [2020-12-22 09:10:38,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:10:38,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:10:38,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942600290] [2020-12-22 09:10:38,872 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:10:38,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:10:38,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:10:38,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:10:38,875 INFO L87 Difference]: Start difference. First operand 32025 states and 52321 transitions. Second operand 4 states. [2020-12-22 09:10:41,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:10:41,900 INFO L93 Difference]: Finished difference Result 95013 states and 155765 transitions. [2020-12-22 09:10:41,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:10:41,902 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 134 [2020-12-22 09:10:41,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:10:42,018 INFO L225 Difference]: With dead ends: 95013 [2020-12-22 09:10:42,018 INFO L226 Difference]: Without dead ends: 63205 [2020-12-22 09:10:42,070 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 09:10:42,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63205 states. [2020-12-22 09:10:45,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63205 to 47481. [2020-12-22 09:10:45,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47481 states. [2020-12-22 09:10:45,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47481 states to 47481 states and 77528 transitions. [2020-12-22 09:10:45,109 INFO L78 Accepts]: Start accepts. Automaton has 47481 states and 77528 transitions. Word has length 134 [2020-12-22 09:10:45,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:10:45,109 INFO L481 AbstractCegarLoop]: Abstraction has 47481 states and 77528 transitions. [2020-12-22 09:10:45,110 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:10:45,110 INFO L276 IsEmpty]: Start isEmpty. Operand 47481 states and 77528 transitions. [2020-12-22 09:10:45,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-12-22 09:10:45,112 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:10:45,112 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] [2020-12-22 09:10:45,112 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 09:10:45,112 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:10:45,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:10:45,113 INFO L82 PathProgramCache]: Analyzing trace with hash 2036277819, now seen corresponding path program 1 times [2020-12-22 09:10:45,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:10:45,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472717292] [2020-12-22 09:10:45,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:10:45,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:10:45,190 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 09:10:45,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472717292] [2020-12-22 09:10:45,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:10:45,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:10:45,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036151690] [2020-12-22 09:10:45,192 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:10:45,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:10:45,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:10:45,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:10:45,193 INFO L87 Difference]: Start difference. First operand 47481 states and 77528 transitions. Second operand 3 states. [2020-12-22 09:10:48,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:10:48,789 INFO L93 Difference]: Finished difference Result 104868 states and 171378 transitions. [2020-12-22 09:10:48,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:10:48,789 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 134 [2020-12-22 09:10:48,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:10:48,883 INFO L225 Difference]: With dead ends: 104868 [2020-12-22 09:10:48,883 INFO L226 Difference]: Without dead ends: 71739 [2020-12-22 09:10:48,912 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 09:10:48,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71739 states. [2020-12-22 09:10:52,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71739 to 71737. [2020-12-22 09:10:52,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71737 states. [2020-12-22 09:10:52,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71737 states to 71737 states and 116704 transitions. [2020-12-22 09:10:52,980 INFO L78 Accepts]: Start accepts. Automaton has 71737 states and 116704 transitions. Word has length 134 [2020-12-22 09:10:52,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:10:52,980 INFO L481 AbstractCegarLoop]: Abstraction has 71737 states and 116704 transitions. [2020-12-22 09:10:52,980 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:10:52,980 INFO L276 IsEmpty]: Start isEmpty. Operand 71737 states and 116704 transitions. [2020-12-22 09:10:52,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-22 09:10:52,982 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:10:52,982 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] [2020-12-22 09:10:52,983 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 09:10:52,983 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:10:52,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:10:52,983 INFO L82 PathProgramCache]: Analyzing trace with hash 1806122865, now seen corresponding path program 1 times [2020-12-22 09:10:52,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:10:52,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453546319] [2020-12-22 09:10:52,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:10:53,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:10:53,063 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 09:10:53,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453546319] [2020-12-22 09:10:53,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:10:53,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:10:53,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808681073] [2020-12-22 09:10:53,065 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:10:53,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:10:53,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:10:53,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:10:53,066 INFO L87 Difference]: Start difference. First operand 71737 states and 116704 transitions. Second operand 3 states. [2020-12-22 09:10:58,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:10:58,438 INFO L93 Difference]: Finished difference Result 156755 states and 255331 transitions. [2020-12-22 09:10:58,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:10:58,438 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 135 [2020-12-22 09:10:58,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:10:58,623 INFO L225 Difference]: With dead ends: 156755 [2020-12-22 09:10:58,623 INFO L226 Difference]: Without dead ends: 106563 [2020-12-22 09:10:58,682 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 09:10:58,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106563 states. [2020-12-22 09:11:04,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106563 to 106561. [2020-12-22 09:11:04,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106561 states. [2020-12-22 09:11:04,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106561 states to 106561 states and 172538 transitions. [2020-12-22 09:11:04,477 INFO L78 Accepts]: Start accepts. Automaton has 106561 states and 172538 transitions. Word has length 135 [2020-12-22 09:11:04,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:11:04,478 INFO L481 AbstractCegarLoop]: Abstraction has 106561 states and 172538 transitions. [2020-12-22 09:11:04,478 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:11:04,478 INFO L276 IsEmpty]: Start isEmpty. Operand 106561 states and 172538 transitions. [2020-12-22 09:11:04,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-12-22 09:11:04,479 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:11:04,480 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] [2020-12-22 09:11:04,480 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 09:11:04,480 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:11:04,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:11:04,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1035920417, now seen corresponding path program 1 times [2020-12-22 09:11:04,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:11:04,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182409859] [2020-12-22 09:11:04,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:11:04,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:11:04,914 WARN L197 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 7 [2020-12-22 09:11:05,019 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 09:11:05,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182409859] [2020-12-22 09:11:05,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:11:05,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:11:05,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525139129] [2020-12-22 09:11:05,021 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:11:05,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:11:05,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:11:05,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:11:05,022 INFO L87 Difference]: Start difference. First operand 106561 states and 172538 transitions. Second operand 4 states. [2020-12-22 09:11:16,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:11:16,509 INFO L93 Difference]: Finished difference Result 315705 states and 511057 transitions. [2020-12-22 09:11:16,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:11:16,509 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 136 [2020-12-22 09:11:16,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:11:17,040 INFO L225 Difference]: With dead ends: 315705 [2020-12-22 09:11:17,041 INFO L226 Difference]: Without dead ends: 209155 [2020-12-22 09:11:17,163 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:11:17,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209155 states. [2020-12-22 09:11:28,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209155 to 209153. [2020-12-22 09:11:28,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209153 states. [2020-12-22 09:11:29,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209153 states to 209153 states and 337361 transitions. [2020-12-22 09:11:29,315 INFO L78 Accepts]: Start accepts. Automaton has 209153 states and 337361 transitions. Word has length 136 [2020-12-22 09:11:29,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:11:29,315 INFO L481 AbstractCegarLoop]: Abstraction has 209153 states and 337361 transitions. [2020-12-22 09:11:29,315 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:11:29,315 INFO L276 IsEmpty]: Start isEmpty. Operand 209153 states and 337361 transitions. [2020-12-22 09:11:29,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-12-22 09:11:29,317 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:11:29,317 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] [2020-12-22 09:11:29,317 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 09:11:29,318 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:11:29,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:11:29,318 INFO L82 PathProgramCache]: Analyzing trace with hash -575910770, now seen corresponding path program 1 times [2020-12-22 09:11:29,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:11:29,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640153676] [2020-12-22 09:11:29,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:11:29,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:11:29,409 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 09:11:29,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640153676] [2020-12-22 09:11:29,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:11:29,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:11:29,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048814905] [2020-12-22 09:11:29,410 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:11:29,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:11:29,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:11:29,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:11:29,411 INFO L87 Difference]: Start difference. First operand 209153 states and 337361 transitions. Second operand 3 states. [2020-12-22 09:11:46,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:11:46,229 INFO L93 Difference]: Finished difference Result 504190 states and 816684 transitions. [2020-12-22 09:11:46,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:11:46,229 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 137 [2020-12-22 09:11:46,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:11:46,859 INFO L225 Difference]: With dead ends: 504190 [2020-12-22 09:11:46,859 INFO L226 Difference]: Without dead ends: 295433 [2020-12-22 09:11:47,065 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 09:11:47,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295433 states.