/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.4.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 09:08:20,282 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 09:08:20,286 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 09:08:20,347 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 09:08:20,348 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 09:08:20,353 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 09:08:20,356 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 09:08:20,363 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 09:08:20,369 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 09:08:20,370 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 09:08:20,371 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 09:08:20,372 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 09:08:20,373 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 09:08:20,374 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 09:08:20,375 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 09:08:20,377 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 09:08:20,378 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 09:08:20,379 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 09:08:20,381 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 09:08:20,383 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 09:08:20,385 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 09:08:20,386 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 09:08:20,388 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 09:08:20,389 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 09:08:20,406 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 09:08:20,423 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 09:08:20,424 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 09:08:20,425 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 09:08:20,431 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 09:08:20,482 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 09:08:20,483 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 09:08:20,484 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 09:08:20,485 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 09:08:20,485 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 09:08:20,485 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 09:08:20,485 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 09:08:20,486 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 09:08:20,486 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 09:08:20,486 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 09:08:20,486 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 09:08:20,487 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 09:08:20,487 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 09:08:20,487 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 09:08:20,487 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 09:08:20,487 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 09:08:20,488 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 09:08:20,488 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:08:20,488 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 09:08:20,488 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 09:08:20,489 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 09:08:20,489 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 09:08:20,489 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 09:08:20,489 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 09:08:20,489 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 09:08:20,490 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 09:08:20,888 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 09:08:20,915 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 09:08:20,919 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 09:08:20,921 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 09:08:20,922 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 09:08:20,923 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2020-12-22 09:08:21,026 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a55924e58/bc60cd801bf14d90a72ddee7cefe4dcd/FLAG353ac9393 [2020-12-22 09:08:21,758 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 09:08:21,759 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2020-12-22 09:08:21,795 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a55924e58/bc60cd801bf14d90a72ddee7cefe4dcd/FLAG353ac9393 [2020-12-22 09:08:22,033 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a55924e58/bc60cd801bf14d90a72ddee7cefe4dcd [2020-12-22 09:08:22,038 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 09:08:22,043 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 09:08:22,046 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 09:08:22,047 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 09:08:22,051 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 09:08:22,053 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:08:22" (1/1) ... [2020-12-22 09:08:22,056 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@736df517 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:08:22, skipping insertion in model container [2020-12-22 09:08:22,056 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:08:22" (1/1) ... [2020-12-22 09:08:22,070 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 09:08:22,155 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 09:08:22,574 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.4.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c[13270,13283] [2020-12-22 09:08:22,699 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:08:22,737 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 09:08:22,864 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.4.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c[13270,13283] [2020-12-22 09:08:22,945 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:08:22,968 INFO L208 MainTranslator]: Completed translation [2020-12-22 09:08:22,969 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:08:22 WrapperNode [2020-12-22 09:08:22,969 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 09:08:22,970 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 09:08:22,971 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 09:08:22,971 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 09:08:22,979 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:08:22" (1/1) ... [2020-12-22 09:08:22,999 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:08:22" (1/1) ... [2020-12-22 09:08:23,094 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 09:08:23,095 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 09:08:23,095 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 09:08:23,095 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 09:08:23,107 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:08:22" (1/1) ... [2020-12-22 09:08:23,108 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:08:22" (1/1) ... [2020-12-22 09:08:23,125 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:08:22" (1/1) ... [2020-12-22 09:08:23,126 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:08:22" (1/1) ... [2020-12-22 09:08:23,167 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:08:22" (1/1) ... [2020-12-22 09:08:23,195 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:08:22" (1/1) ... [2020-12-22 09:08:23,208 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:08:22" (1/1) ... [2020-12-22 09:08:23,219 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 09:08:23,220 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 09:08:23,221 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 09:08:23,221 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 09:08:23,222 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:08:22" (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 09:08:23,350 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 09:08:23,350 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 09:08:23,350 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 09:08:23,351 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 09:08:24,886 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 09:08:24,887 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 09:08:24,889 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:08:24 BoogieIcfgContainer [2020-12-22 09:08:24,890 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 09:08:24,892 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 09:08:24,892 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 09:08:24,895 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 09:08:24,896 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:08:22" (1/3) ... [2020-12-22 09:08:24,897 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75ffad83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:08:24, skipping insertion in model container [2020-12-22 09:08:24,897 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:08:22" (2/3) ... [2020-12-22 09:08:24,897 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75ffad83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:08:24, skipping insertion in model container [2020-12-22 09:08:24,897 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:08:24" (3/3) ... [2020-12-22 09:08:24,899 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2020-12-22 09:08:24,906 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 09:08:24,912 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 09:08:24,932 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 09:08:24,964 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 09:08:24,964 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 09:08:24,965 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 09:08:24,965 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 09:08:24,965 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 09:08:24,965 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 09:08:24,965 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 09:08:24,965 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 09:08:24,992 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states. [2020-12-22 09:08:25,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-12-22 09:08:25,010 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:08:25,011 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 09:08:25,011 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:08:25,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:08:25,018 INFO L82 PathProgramCache]: Analyzing trace with hash 1594884720, now seen corresponding path program 1 times [2020-12-22 09:08:25,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:08:25,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960499164] [2020-12-22 09:08:25,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:08:25,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:08:25,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:08:25,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960499164] [2020-12-22 09:08:25,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:08:25,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:08:25,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113287854] [2020-12-22 09:08:25,670 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:08:25,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:08:25,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:08:25,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:08:25,697 INFO L87 Difference]: Start difference. First operand 342 states. Second operand 3 states. [2020-12-22 09:08:25,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:08:25,910 INFO L93 Difference]: Finished difference Result 628 states and 1091 transitions. [2020-12-22 09:08:25,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:08:25,912 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 118 [2020-12-22 09:08:25,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:08:25,933 INFO L225 Difference]: With dead ends: 628 [2020-12-22 09:08:25,933 INFO L226 Difference]: Without dead ends: 473 [2020-12-22 09:08:25,938 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:08:25,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2020-12-22 09:08:26,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 471. [2020-12-22 09:08:26,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 471 states. [2020-12-22 09:08:26,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 779 transitions. [2020-12-22 09:08:26,027 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 779 transitions. Word has length 118 [2020-12-22 09:08:26,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:08:26,028 INFO L481 AbstractCegarLoop]: Abstraction has 471 states and 779 transitions. [2020-12-22 09:08:26,029 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:08:26,029 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 779 transitions. [2020-12-22 09:08:26,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-12-22 09:08:26,035 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:08:26,036 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 09:08:26,036 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 09:08:26,036 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:08:26,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:08:26,037 INFO L82 PathProgramCache]: Analyzing trace with hash -910979864, now seen corresponding path program 1 times [2020-12-22 09:08:26,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:08:26,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062449696] [2020-12-22 09:08:26,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:08:26,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:08:26,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:08:26,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062449696] [2020-12-22 09:08:26,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:08:26,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:08:26,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929933501] [2020-12-22 09:08:26,268 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:08:26,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:08:26,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:08:26,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:08:26,270 INFO L87 Difference]: Start difference. First operand 471 states and 779 transitions. Second operand 3 states. [2020-12-22 09:08:26,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:08:26,325 INFO L93 Difference]: Finished difference Result 1007 states and 1675 transitions. [2020-12-22 09:08:26,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:08:26,326 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 121 [2020-12-22 09:08:26,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:08:26,332 INFO L225 Difference]: With dead ends: 1007 [2020-12-22 09:08:26,332 INFO L226 Difference]: Without dead ends: 729 [2020-12-22 09:08:26,335 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:08:26,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 729 states. [2020-12-22 09:08:26,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 729 to 727. [2020-12-22 09:08:26,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 727 states. [2020-12-22 09:08:26,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 727 states to 727 states and 1206 transitions. [2020-12-22 09:08:26,388 INFO L78 Accepts]: Start accepts. Automaton has 727 states and 1206 transitions. Word has length 121 [2020-12-22 09:08:26,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:08:26,389 INFO L481 AbstractCegarLoop]: Abstraction has 727 states and 1206 transitions. [2020-12-22 09:08:26,389 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:08:26,390 INFO L276 IsEmpty]: Start isEmpty. Operand 727 states and 1206 transitions. [2020-12-22 09:08:26,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-12-22 09:08:26,392 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:08:26,392 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 09:08:26,393 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 09:08:26,393 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:08:26,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:08:26,394 INFO L82 PathProgramCache]: Analyzing trace with hash -195863697, now seen corresponding path program 1 times [2020-12-22 09:08:26,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:08:26,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725489022] [2020-12-22 09:08:26,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:08:26,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:08:26,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:08:26,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725489022] [2020-12-22 09:08:26,608 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:08:26,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:08:26,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543572134] [2020-12-22 09:08:26,611 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:08:26,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:08:26,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:08:26,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:08:26,615 INFO L87 Difference]: Start difference. First operand 727 states and 1206 transitions. Second operand 3 states. [2020-12-22 09:08:26,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:08:26,686 INFO L93 Difference]: Finished difference Result 1755 states and 2920 transitions. [2020-12-22 09:08:26,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:08:26,687 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 124 [2020-12-22 09:08:26,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:08:26,698 INFO L225 Difference]: With dead ends: 1755 [2020-12-22 09:08:26,699 INFO L226 Difference]: Without dead ends: 1221 [2020-12-22 09:08:26,701 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:08:26,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1221 states. [2020-12-22 09:08:26,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1221 to 1219. [2020-12-22 09:08:26,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1219 states. [2020-12-22 09:08:26,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1219 states to 1219 states and 2022 transitions. [2020-12-22 09:08:26,775 INFO L78 Accepts]: Start accepts. Automaton has 1219 states and 2022 transitions. Word has length 124 [2020-12-22 09:08:26,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:08:26,776 INFO L481 AbstractCegarLoop]: Abstraction has 1219 states and 2022 transitions. [2020-12-22 09:08:26,776 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:08:26,776 INFO L276 IsEmpty]: Start isEmpty. Operand 1219 states and 2022 transitions. [2020-12-22 09:08:26,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-12-22 09:08:26,780 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:08:26,781 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 09:08:26,781 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 09:08:26,781 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:08:26,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:08:26,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1851247163, now seen corresponding path program 1 times [2020-12-22 09:08:26,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:08:26,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894841412] [2020-12-22 09:08:26,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:08:26,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:08:26,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:08:26,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894841412] [2020-12-22 09:08:26,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:08:26,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:08:26,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249657221] [2020-12-22 09:08:26,942 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:08:26,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:08:26,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:08:26,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:08:26,944 INFO L87 Difference]: Start difference. First operand 1219 states and 2022 transitions. Second operand 3 states. [2020-12-22 09:08:27,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:08:27,068 INFO L93 Difference]: Finished difference Result 3191 states and 5296 transitions. [2020-12-22 09:08:27,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:08:27,069 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 127 [2020-12-22 09:08:27,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:08:27,085 INFO L225 Difference]: With dead ends: 3191 [2020-12-22 09:08:27,085 INFO L226 Difference]: Without dead ends: 2165 [2020-12-22 09:08:27,089 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:08:27,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2165 states. [2020-12-22 09:08:27,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2165 to 2163. [2020-12-22 09:08:27,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2163 states. [2020-12-22 09:08:27,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2163 states to 2163 states and 3578 transitions. [2020-12-22 09:08:27,249 INFO L78 Accepts]: Start accepts. Automaton has 2163 states and 3578 transitions. Word has length 127 [2020-12-22 09:08:27,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:08:27,251 INFO L481 AbstractCegarLoop]: Abstraction has 2163 states and 3578 transitions. [2020-12-22 09:08:27,251 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:08:27,252 INFO L276 IsEmpty]: Start isEmpty. Operand 2163 states and 3578 transitions. [2020-12-22 09:08:27,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-22 09:08:27,260 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:08:27,261 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 09:08:27,261 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 09:08:27,261 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:08:27,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:08:27,262 INFO L82 PathProgramCache]: Analyzing trace with hash -559497898, now seen corresponding path program 1 times [2020-12-22 09:08:27,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:08:27,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761342435] [2020-12-22 09:08:27,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:08:27,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:08:27,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:08:27,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761342435] [2020-12-22 09:08:27,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:08:27,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:08:27,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18582402] [2020-12-22 09:08:27,703 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:08:27,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:08:27,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:08:27,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:08:27,706 INFO L87 Difference]: Start difference. First operand 2163 states and 3578 transitions. Second operand 6 states. [2020-12-22 09:08:28,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:08:28,511 INFO L93 Difference]: Finished difference Result 11283 states and 18810 transitions. [2020-12-22 09:08:28,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 09:08:28,514 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 130 [2020-12-22 09:08:28,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:08:28,567 INFO L225 Difference]: With dead ends: 11283 [2020-12-22 09:08:28,568 INFO L226 Difference]: Without dead ends: 9313 [2020-12-22 09:08:28,577 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 09:08:28,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9313 states. [2020-12-22 09:08:28,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9313 to 4001. [2020-12-22 09:08:28,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4001 states. [2020-12-22 09:08:29,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4001 states to 4001 states and 6621 transitions. [2020-12-22 09:08:29,003 INFO L78 Accepts]: Start accepts. Automaton has 4001 states and 6621 transitions. Word has length 130 [2020-12-22 09:08:29,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:08:29,003 INFO L481 AbstractCegarLoop]: Abstraction has 4001 states and 6621 transitions. [2020-12-22 09:08:29,003 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:08:29,004 INFO L276 IsEmpty]: Start isEmpty. Operand 4001 states and 6621 transitions. [2020-12-22 09:08:29,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-12-22 09:08:29,008 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:08:29,008 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:08:29,008 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 09:08:29,009 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:08:29,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:08:29,010 INFO L82 PathProgramCache]: Analyzing trace with hash -231627666, now seen corresponding path program 1 times [2020-12-22 09:08:29,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:08:29,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64431665] [2020-12-22 09:08:29,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:08:29,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:08:29,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:08:29,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64431665] [2020-12-22 09:08:29,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:08:29,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:08:29,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155620313] [2020-12-22 09:08:29,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:08:29,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:08:29,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:08:29,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:08:29,156 INFO L87 Difference]: Start difference. First operand 4001 states and 6621 transitions. Second operand 4 states. [2020-12-22 09:08:29,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:08:29,653 INFO L93 Difference]: Finished difference Result 11713 states and 19481 transitions. [2020-12-22 09:08:29,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:08:29,654 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 131 [2020-12-22 09:08:29,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:08:29,698 INFO L225 Difference]: With dead ends: 11713 [2020-12-22 09:08:29,698 INFO L226 Difference]: Without dead ends: 7905 [2020-12-22 09:08:29,707 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 09:08:29,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7905 states. [2020-12-22 09:08:30,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7905 to 5936. [2020-12-22 09:08:30,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5936 states. [2020-12-22 09:08:30,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5936 states to 5936 states and 9836 transitions. [2020-12-22 09:08:30,159 INFO L78 Accepts]: Start accepts. Automaton has 5936 states and 9836 transitions. Word has length 131 [2020-12-22 09:08:30,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:08:30,160 INFO L481 AbstractCegarLoop]: Abstraction has 5936 states and 9836 transitions. [2020-12-22 09:08:30,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:08:30,160 INFO L276 IsEmpty]: Start isEmpty. Operand 5936 states and 9836 transitions. [2020-12-22 09:08:30,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-12-22 09:08:30,166 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:08:30,166 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 09:08:30,166 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 09:08:30,166 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:08:30,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:08:30,167 INFO L82 PathProgramCache]: Analyzing trace with hash 1540206583, now seen corresponding path program 1 times [2020-12-22 09:08:30,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:08:30,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474365711] [2020-12-22 09:08:30,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:08:30,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:08:30,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:08:30,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474365711] [2020-12-22 09:08:30,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:08:30,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:08:30,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235586202] [2020-12-22 09:08:30,335 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:08:30,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:08:30,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:08:30,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:08:30,336 INFO L87 Difference]: Start difference. First operand 5936 states and 9836 transitions. Second operand 3 states. [2020-12-22 09:08:30,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:08:30,915 INFO L93 Difference]: Finished difference Result 13025 states and 21678 transitions. [2020-12-22 09:08:30,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:08:30,916 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 132 [2020-12-22 09:08:30,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:08:30,970 INFO L225 Difference]: With dead ends: 13025 [2020-12-22 09:08:30,971 INFO L226 Difference]: Without dead ends: 9024 [2020-12-22 09:08:30,981 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:08:30,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9024 states. [2020-12-22 09:08:31,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9024 to 9022. [2020-12-22 09:08:31,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9022 states. [2020-12-22 09:08:31,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9022 states to 9022 states and 14950 transitions. [2020-12-22 09:08:31,622 INFO L78 Accepts]: Start accepts. Automaton has 9022 states and 14950 transitions. Word has length 132 [2020-12-22 09:08:31,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:08:31,622 INFO L481 AbstractCegarLoop]: Abstraction has 9022 states and 14950 transitions. [2020-12-22 09:08:31,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:08:31,622 INFO L276 IsEmpty]: Start isEmpty. Operand 9022 states and 14950 transitions. [2020-12-22 09:08:31,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-12-22 09:08:31,625 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:08:31,625 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 09:08:31,625 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 09:08:31,626 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:08:31,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:08:31,626 INFO L82 PathProgramCache]: Analyzing trace with hash 579129211, now seen corresponding path program 1 times [2020-12-22 09:08:31,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:08:31,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791668428] [2020-12-22 09:08:31,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:08:31,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:08:31,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:08:31,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791668428] [2020-12-22 09:08:31,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:08:31,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:08:31,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483012561] [2020-12-22 09:08:31,755 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:08:31,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:08:31,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:08:31,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:08:31,756 INFO L87 Difference]: Start difference. First operand 9022 states and 14950 transitions. Second operand 3 states. [2020-12-22 09:08:32,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:08:32,449 INFO L93 Difference]: Finished difference Result 17368 states and 28819 transitions. [2020-12-22 09:08:32,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:08:32,449 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 132 [2020-12-22 09:08:32,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:08:32,484 INFO L225 Difference]: With dead ends: 17368 [2020-12-22 09:08:32,484 INFO L226 Difference]: Without dead ends: 12606 [2020-12-22 09:08:32,495 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:08:32,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12606 states. [2020-12-22 09:08:33,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12606 to 12604. [2020-12-22 09:08:33,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12604 states. [2020-12-22 09:08:33,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12604 states to 12604 states and 20840 transitions. [2020-12-22 09:08:33,314 INFO L78 Accepts]: Start accepts. Automaton has 12604 states and 20840 transitions. Word has length 132 [2020-12-22 09:08:33,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:08:33,315 INFO L481 AbstractCegarLoop]: Abstraction has 12604 states and 20840 transitions. [2020-12-22 09:08:33,315 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:08:33,315 INFO L276 IsEmpty]: Start isEmpty. Operand 12604 states and 20840 transitions. [2020-12-22 09:08:33,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-12-22 09:08:33,317 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:08:33,318 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 09:08:33,318 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 09:08:33,318 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:08:33,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:08:33,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1676490411, now seen corresponding path program 1 times [2020-12-22 09:08:33,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:08:33,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625160605] [2020-12-22 09:08:33,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:08:33,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:08:33,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:08:33,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625160605] [2020-12-22 09:08:33,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:08:33,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:08:33,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664550356] [2020-12-22 09:08:33,449 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:08:33,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:08:33,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:08:33,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:08:33,451 INFO L87 Difference]: Start difference. First operand 12604 states and 20840 transitions. Second operand 3 states. [2020-12-22 09:08:34,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:08:34,674 INFO L93 Difference]: Finished difference Result 24110 states and 39925 transitions. [2020-12-22 09:08:34,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:08:34,675 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 132 [2020-12-22 09:08:34,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:08:34,732 INFO L225 Difference]: With dead ends: 24110 [2020-12-22 09:08:34,732 INFO L226 Difference]: Without dead ends: 17468 [2020-12-22 09:08:34,746 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:08:34,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17468 states. [2020-12-22 09:08:35,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17468 to 17466. [2020-12-22 09:08:35,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17466 states. [2020-12-22 09:08:35,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17466 states to 17466 states and 28808 transitions. [2020-12-22 09:08:35,592 INFO L78 Accepts]: Start accepts. Automaton has 17466 states and 28808 transitions. Word has length 132 [2020-12-22 09:08:35,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:08:35,592 INFO L481 AbstractCegarLoop]: Abstraction has 17466 states and 28808 transitions. [2020-12-22 09:08:35,592 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:08:35,592 INFO L276 IsEmpty]: Start isEmpty. Operand 17466 states and 28808 transitions. [2020-12-22 09:08:35,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-12-22 09:08:35,665 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:08:35,665 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 09:08:35,665 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 09:08:35,666 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:08:35,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:08:35,666 INFO L82 PathProgramCache]: Analyzing trace with hash 1346972957, now seen corresponding path program 1 times [2020-12-22 09:08:35,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:08:35,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649909621] [2020-12-22 09:08:35,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:08:35,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:08:35,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:08:35,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649909621] [2020-12-22 09:08:35,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:08:35,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:08:35,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735956290] [2020-12-22 09:08:35,830 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:08:35,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:08:35,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:08:35,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:08:35,831 INFO L87 Difference]: Start difference. First operand 17466 states and 28808 transitions. Second operand 4 states. [2020-12-22 09:08:37,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:08:37,774 INFO L93 Difference]: Finished difference Result 56537 states and 93383 transitions. [2020-12-22 09:08:37,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:08:37,781 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 132 [2020-12-22 09:08:37,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:08:37,888 INFO L225 Difference]: With dead ends: 56537 [2020-12-22 09:08:37,889 INFO L226 Difference]: Without dead ends: 39310 [2020-12-22 09:08:37,917 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 09:08:37,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39310 states. [2020-12-22 09:08:39,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39310 to 28329. [2020-12-22 09:08:39,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28329 states. [2020-12-22 09:08:39,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28329 states to 28329 states and 46597 transitions. [2020-12-22 09:08:39,820 INFO L78 Accepts]: Start accepts. Automaton has 28329 states and 46597 transitions. Word has length 132 [2020-12-22 09:08:39,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:08:39,821 INFO L481 AbstractCegarLoop]: Abstraction has 28329 states and 46597 transitions. [2020-12-22 09:08:39,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:08:39,821 INFO L276 IsEmpty]: Start isEmpty. Operand 28329 states and 46597 transitions. [2020-12-22 09:08:39,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-12-22 09:08:39,823 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:08:39,823 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 09:08:39,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 09:08:39,823 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:08:39,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:08:39,824 INFO L82 PathProgramCache]: Analyzing trace with hash -434438713, now seen corresponding path program 1 times [2020-12-22 09:08:39,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:08:39,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684679680] [2020-12-22 09:08:39,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:08:39,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:08:39,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:08:39,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684679680] [2020-12-22 09:08:39,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:08:39,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:08:39,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762075007] [2020-12-22 09:08:39,913 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:08:39,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:08:39,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:08:39,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:08:39,915 INFO L87 Difference]: Start difference. First operand 28329 states and 46597 transitions. Second operand 3 states. [2020-12-22 09:08:41,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:08:41,866 INFO L93 Difference]: Finished difference Result 54295 states and 89424 transitions. [2020-12-22 09:08:41,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:08:41,867 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 132 [2020-12-22 09:08:41,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:08:41,943 INFO L225 Difference]: With dead ends: 54295 [2020-12-22 09:08:41,944 INFO L226 Difference]: Without dead ends: 39073 [2020-12-22 09:08:41,974 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:08:42,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39073 states. [2020-12-22 09:08:43,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39073 to 39071. [2020-12-22 09:08:44,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39071 states. [2020-12-22 09:08:44,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39071 states to 39071 states and 64051 transitions. [2020-12-22 09:08:44,082 INFO L78 Accepts]: Start accepts. Automaton has 39071 states and 64051 transitions. Word has length 132 [2020-12-22 09:08:44,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:08:44,082 INFO L481 AbstractCegarLoop]: Abstraction has 39071 states and 64051 transitions. [2020-12-22 09:08:44,082 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:08:44,082 INFO L276 IsEmpty]: Start isEmpty. Operand 39071 states and 64051 transitions. [2020-12-22 09:08:44,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-12-22 09:08:44,083 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:08:44,084 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 09:08:44,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 09:08:44,084 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:08:44,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:08:44,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1251457259, now seen corresponding path program 1 times [2020-12-22 09:08:44,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:08:44,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889952363] [2020-12-22 09:08:44,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:08:44,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:08:44,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:08:44,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889952363] [2020-12-22 09:08:44,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:08:44,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:08:44,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764088062] [2020-12-22 09:08:44,238 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:08:44,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:08:44,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:08:44,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:08:44,239 INFO L87 Difference]: Start difference. First operand 39071 states and 64051 transitions. Second operand 4 states. [2020-12-22 09:08:48,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:08:48,125 INFO L93 Difference]: Finished difference Result 126537 states and 207711 transitions. [2020-12-22 09:08:48,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:08:48,126 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 133 [2020-12-22 09:08:48,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:08:48,304 INFO L225 Difference]: With dead ends: 126537 [2020-12-22 09:08:48,304 INFO L226 Difference]: Without dead ends: 87727 [2020-12-22 09:08:48,350 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 09:08:48,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87727 states. [2020-12-22 09:08:51,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87727 to 63256. [2020-12-22 09:08:51,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63256 states. [2020-12-22 09:08:52,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63256 states to 63256 states and 103358 transitions. [2020-12-22 09:08:52,112 INFO L78 Accepts]: Start accepts. Automaton has 63256 states and 103358 transitions. Word has length 133 [2020-12-22 09:08:52,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:08:52,113 INFO L481 AbstractCegarLoop]: Abstraction has 63256 states and 103358 transitions. [2020-12-22 09:08:52,113 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:08:52,113 INFO L276 IsEmpty]: Start isEmpty. Operand 63256 states and 103358 transitions. [2020-12-22 09:08:52,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-12-22 09:08:52,123 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:08:52,123 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 09:08:52,123 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 09:08:52,124 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:08:52,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:08:52,125 INFO L82 PathProgramCache]: Analyzing trace with hash -193857308, now seen corresponding path program 1 times [2020-12-22 09:08:52,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:08:52,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163844591] [2020-12-22 09:08:52,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:08:52,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:08:52,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:08:52,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163844591] [2020-12-22 09:08:52,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:08:52,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:08:52,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197072435] [2020-12-22 09:08:52,255 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:08:52,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:08:52,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:08:52,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:08:52,256 INFO L87 Difference]: Start difference. First operand 63256 states and 103358 transitions. Second operand 4 states. [2020-12-22 09:08:58,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:08:58,916 INFO L93 Difference]: Finished difference Result 202567 states and 331417 transitions. [2020-12-22 09:08:58,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:08:58,917 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 134 [2020-12-22 09:08:58,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:08:59,185 INFO L225 Difference]: With dead ends: 202567 [2020-12-22 09:08:59,186 INFO L226 Difference]: Without dead ends: 139572 [2020-12-22 09:08:59,272 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 09:08:59,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139572 states. [2020-12-22 09:09:04,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139572 to 101189. [2020-12-22 09:09:04,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101189 states. [2020-12-22 09:09:04,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101189 states to 101189 states and 164801 transitions. [2020-12-22 09:09:04,961 INFO L78 Accepts]: Start accepts. Automaton has 101189 states and 164801 transitions. Word has length 134 [2020-12-22 09:09:04,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:09:04,962 INFO L481 AbstractCegarLoop]: Abstraction has 101189 states and 164801 transitions. [2020-12-22 09:09:04,962 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:09:04,962 INFO L276 IsEmpty]: Start isEmpty. Operand 101189 states and 164801 transitions. [2020-12-22 09:09:04,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-12-22 09:09:04,963 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:09:04,963 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 09:09:04,963 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 09:09:04,963 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:09:04,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:09:04,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1164383125, now seen corresponding path program 1 times [2020-12-22 09:09:04,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:09:04,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570372367] [2020-12-22 09:09:04,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:09:05,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:09:05,477 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 09:09:05,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570372367] [2020-12-22 09:09:05,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:09:05,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:09:05,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431985366] [2020-12-22 09:09:05,479 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:09:05,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:09:05,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:09:05,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:09:05,480 INFO L87 Difference]: Start difference. First operand 101189 states and 164801 transitions. Second operand 4 states. [2020-12-22 09:09:16,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:09:16,242 INFO L93 Difference]: Finished difference Result 299589 states and 487846 transitions. [2020-12-22 09:09:16,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:09:16,242 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 136 [2020-12-22 09:09:16,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:09:16,787 INFO L225 Difference]: With dead ends: 299589 [2020-12-22 09:09:16,787 INFO L226 Difference]: Without dead ends: 198411 [2020-12-22 09:09:16,901 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:09:17,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198411 states. [2020-12-22 09:09:27,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198411 to 198409. [2020-12-22 09:09:27,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198409 states. [2020-12-22 09:09:28,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198409 states to 198409 states and 321887 transitions. [2020-12-22 09:09:28,292 INFO L78 Accepts]: Start accepts. Automaton has 198409 states and 321887 transitions. Word has length 136 [2020-12-22 09:09:28,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:09:28,293 INFO L481 AbstractCegarLoop]: Abstraction has 198409 states and 321887 transitions. [2020-12-22 09:09:28,293 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:09:28,293 INFO L276 IsEmpty]: Start isEmpty. Operand 198409 states and 321887 transitions. [2020-12-22 09:09:28,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-12-22 09:09:28,295 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:09:28,296 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 09:09:28,296 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 09:09:28,296 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:09:28,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:09:28,297 INFO L82 PathProgramCache]: Analyzing trace with hash -512784610, now seen corresponding path program 1 times [2020-12-22 09:09:28,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:09:28,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617080085] [2020-12-22 09:09:28,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:09:28,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:09:28,389 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 09:09:28,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617080085] [2020-12-22 09:09:28,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:09:28,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:09:28,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138341563] [2020-12-22 09:09:28,390 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:09:28,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:09:28,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:09:28,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:09:28,392 INFO L87 Difference]: Start difference. First operand 198409 states and 321887 transitions. Second operand 3 states. [2020-12-22 09:09:44,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:09:44,239 INFO L93 Difference]: Finished difference Result 477408 states and 777968 transitions. [2020-12-22 09:09:44,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:09:44,239 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 137 [2020-12-22 09:09:44,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:09:44,802 INFO L225 Difference]: With dead ends: 477408 [2020-12-22 09:09:44,802 INFO L226 Difference]: Without dead ends: 279395 [2020-12-22 09:09:44,979 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 09:09:45,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279395 states. [2020-12-22 09:10:00,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279395 to 272771. [2020-12-22 09:10:00,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272771 states. [2020-12-22 09:10:01,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272771 states to 272771 states and 440928 transitions. [2020-12-22 09:10:01,229 INFO L78 Accepts]: Start accepts. Automaton has 272771 states and 440928 transitions. Word has length 137 [2020-12-22 09:10:01,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:10:01,236 INFO L481 AbstractCegarLoop]: Abstraction has 272771 states and 440928 transitions. [2020-12-22 09:10:01,236 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:10:01,237 INFO L276 IsEmpty]: Start isEmpty. Operand 272771 states and 440928 transitions. [2020-12-22 09:10:01,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-22 09:10:01,238 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:10:01,238 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:10:01,238 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 09:10:01,239 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:10:01,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:10:01,239 INFO L82 PathProgramCache]: Analyzing trace with hash -2059883198, now seen corresponding path program 1 times [2020-12-22 09:10:01,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:10:01,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118998767] [2020-12-22 09:10:01,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:10:01,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:10:01,293 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 09:10:01,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118998767] [2020-12-22 09:10:01,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:10:01,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:10:01,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19562080] [2020-12-22 09:10:01,294 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:10:01,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:10:01,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:10:01,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:10:01,295 INFO L87 Difference]: Start difference. First operand 272771 states and 440928 transitions. Second operand 3 states.