/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_floodmax.4.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 08:10:22,713 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 08:10:22,720 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 08:10:22,777 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 08:10:22,778 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 08:10:22,783 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 08:10:22,787 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 08:10:22,795 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 08:10:22,799 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 08:10:22,805 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 08:10:22,806 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 08:10:22,811 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 08:10:22,811 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 08:10:22,815 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 08:10:22,817 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 08:10:22,820 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 08:10:22,821 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 08:10:22,826 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 08:10:22,845 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 08:10:22,848 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 08:10:22,852 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 08:10:22,855 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 08:10:22,856 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 08:10:22,858 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 08:10:22,866 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 08:10:22,880 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 08:10:22,881 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 08:10:22,882 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 08:10:22,888 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 08:10:22,938 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 08:10:22,938 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 08:10:22,944 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 08:10:22,944 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 08:10:22,945 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 08:10:22,945 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 08:10:22,945 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 08:10:22,945 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 08:10:22,946 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 08:10:22,946 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 08:10:22,947 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 08:10:22,948 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 08:10:22,948 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 08:10:22,948 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 08:10:22,948 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 08:10:22,949 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 08:10:22,949 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 08:10:22,949 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 08:10:22,949 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 08:10:22,949 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 08:10:22,950 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 08:10:22,950 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 08:10:22,950 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 08:10:22,951 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 08:10:22,951 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 08:10:22,951 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 08:10:23,349 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 08:10:23,387 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 08:10:23,393 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 08:10:23,394 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 08:10:23,395 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 08:10:23,396 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2020-12-22 08:10:23,478 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fdbff6497/abaf24c7bb114ee1b97e5f700f89070c/FLAGa56b01c87 [2020-12-22 08:10:24,175 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 08:10:24,176 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2020-12-22 08:10:24,198 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fdbff6497/abaf24c7bb114ee1b97e5f700f89070c/FLAGa56b01c87 [2020-12-22 08:10:24,480 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fdbff6497/abaf24c7bb114ee1b97e5f700f89070c [2020-12-22 08:10:24,484 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 08:10:24,487 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 08:10:24,492 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 08:10:24,492 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 08:10:24,496 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 08:10:24,498 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:10:24" (1/1) ... [2020-12-22 08:10:24,500 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e1fb0cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:10:24, skipping insertion in model container [2020-12-22 08:10:24,501 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:10:24" (1/1) ... [2020-12-22 08:10:24,510 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 08:10:24,602 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 08:10:24,921 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_floodmax.4.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c[12430,12443] [2020-12-22 08:10:25,012 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:10:25,040 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 08:10:25,158 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_floodmax.4.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c[12430,12443] [2020-12-22 08:10:25,297 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:10:25,345 INFO L208 MainTranslator]: Completed translation [2020-12-22 08:10:25,345 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:10:25 WrapperNode [2020-12-22 08:10:25,345 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 08:10:25,348 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 08:10:25,348 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 08:10:25,348 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 08:10:25,355 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:10:25" (1/1) ... [2020-12-22 08:10:25,377 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:10:25" (1/1) ... [2020-12-22 08:10:25,454 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 08:10:25,455 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 08:10:25,456 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 08:10:25,456 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 08:10:25,466 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:10:25" (1/1) ... [2020-12-22 08:10:25,467 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:10:25" (1/1) ... [2020-12-22 08:10:25,474 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:10:25" (1/1) ... [2020-12-22 08:10:25,474 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:10:25" (1/1) ... [2020-12-22 08:10:25,499 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:10:25" (1/1) ... [2020-12-22 08:10:25,526 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:10:25" (1/1) ... [2020-12-22 08:10:25,533 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:10:25" (1/1) ... [2020-12-22 08:10:25,555 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 08:10:25,556 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 08:10:25,556 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 08:10:25,557 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 08:10:25,558 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:10:25" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 08:10:25,655 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 08:10:25,656 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 08:10:25,656 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 08:10:25,656 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 08:10:27,251 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 08:10:27,251 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 08:10:27,254 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:10:27 BoogieIcfgContainer [2020-12-22 08:10:27,254 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 08:10:27,256 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 08:10:27,256 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 08:10:27,259 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 08:10:27,260 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 08:10:24" (1/3) ... [2020-12-22 08:10:27,261 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e705f4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:10:27, skipping insertion in model container [2020-12-22 08:10:27,261 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:10:25" (2/3) ... [2020-12-22 08:10:27,261 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e705f4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:10:27, skipping insertion in model container [2020-12-22 08:10:27,262 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:10:27" (3/3) ... [2020-12-22 08:10:27,263 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2020-12-22 08:10:27,270 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 08:10:27,276 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 08:10:27,296 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 08:10:27,326 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 08:10:27,326 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 08:10:27,326 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 08:10:27,326 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 08:10:27,327 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 08:10:27,327 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 08:10:27,327 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 08:10:27,327 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 08:10:27,350 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states. [2020-12-22 08:10:27,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-22 08:10:27,366 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:10:27,367 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] [2020-12-22 08:10:27,368 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:10:27,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:10:27,374 INFO L82 PathProgramCache]: Analyzing trace with hash 304488522, now seen corresponding path program 1 times [2020-12-22 08:10:27,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:10:27,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55785833] [2020-12-22 08:10:27,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:10:27,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:10:27,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:10:27,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55785833] [2020-12-22 08:10:27,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:10:27,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:10:27,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010178442] [2020-12-22 08:10:27,988 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:10:27,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:10:28,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:10:28,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:10:28,007 INFO L87 Difference]: Start difference. First operand 319 states. Second operand 3 states. [2020-12-22 08:10:28,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:10:28,201 INFO L93 Difference]: Finished difference Result 568 states and 991 transitions. [2020-12-22 08:10:28,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:10:28,203 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 111 [2020-12-22 08:10:28,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:10:28,239 INFO L225 Difference]: With dead ends: 568 [2020-12-22 08:10:28,239 INFO L226 Difference]: Without dead ends: 432 [2020-12-22 08:10:28,244 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:10:28,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2020-12-22 08:10:28,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 430. [2020-12-22 08:10:28,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 430 states. [2020-12-22 08:10:28,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 714 transitions. [2020-12-22 08:10:28,343 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 714 transitions. Word has length 111 [2020-12-22 08:10:28,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:10:28,344 INFO L481 AbstractCegarLoop]: Abstraction has 430 states and 714 transitions. [2020-12-22 08:10:28,345 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:10:28,345 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 714 transitions. [2020-12-22 08:10:28,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-12-22 08:10:28,355 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:10:28,355 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] [2020-12-22 08:10:28,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 08:10:28,356 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:10:28,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:10:28,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1517208970, now seen corresponding path program 1 times [2020-12-22 08:10:28,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:10:28,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266055890] [2020-12-22 08:10:28,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:10:28,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:10:28,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:10:28,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266055890] [2020-12-22 08:10:28,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:10:28,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:10:28,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437612443] [2020-12-22 08:10:28,665 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:10:28,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:10:28,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:10:28,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:10:28,667 INFO L87 Difference]: Start difference. First operand 430 states and 714 transitions. Second operand 3 states. [2020-12-22 08:10:28,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:10:28,723 INFO L93 Difference]: Finished difference Result 660 states and 1105 transitions. [2020-12-22 08:10:28,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:10:28,724 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 114 [2020-12-22 08:10:28,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:10:28,729 INFO L225 Difference]: With dead ends: 660 [2020-12-22 08:10:28,729 INFO L226 Difference]: Without dead ends: 533 [2020-12-22 08:10:28,731 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:10:28,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2020-12-22 08:10:28,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 531. [2020-12-22 08:10:28,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 531 states. [2020-12-22 08:10:28,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 886 transitions. [2020-12-22 08:10:28,767 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 886 transitions. Word has length 114 [2020-12-22 08:10:28,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:10:28,768 INFO L481 AbstractCegarLoop]: Abstraction has 531 states and 886 transitions. [2020-12-22 08:10:28,768 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:10:28,768 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 886 transitions. [2020-12-22 08:10:28,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-12-22 08:10:28,770 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:10:28,771 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] [2020-12-22 08:10:28,771 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 08:10:28,771 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:10:28,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:10:28,772 INFO L82 PathProgramCache]: Analyzing trace with hash -1179194652, now seen corresponding path program 1 times [2020-12-22 08:10:28,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:10:28,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94731639] [2020-12-22 08:10:28,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:10:28,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:10:28,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:10:28,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94731639] [2020-12-22 08:10:28,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:10:28,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:10:28,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815623182] [2020-12-22 08:10:28,925 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:10:28,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:10:28,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:10:28,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:10:28,951 INFO L87 Difference]: Start difference. First operand 531 states and 886 transitions. Second operand 3 states. [2020-12-22 08:10:29,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:10:29,015 INFO L93 Difference]: Finished difference Result 1184 states and 1985 transitions. [2020-12-22 08:10:29,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:10:29,016 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 114 [2020-12-22 08:10:29,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:10:29,021 INFO L225 Difference]: With dead ends: 1184 [2020-12-22 08:10:29,022 INFO L226 Difference]: Without dead ends: 844 [2020-12-22 08:10:29,024 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:10:29,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 844 states. [2020-12-22 08:10:29,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 844 to 842. [2020-12-22 08:10:29,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 842 states. [2020-12-22 08:10:29,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 1406 transitions. [2020-12-22 08:10:29,063 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 1406 transitions. Word has length 114 [2020-12-22 08:10:29,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:10:29,064 INFO L481 AbstractCegarLoop]: Abstraction has 842 states and 1406 transitions. [2020-12-22 08:10:29,064 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:10:29,064 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 1406 transitions. [2020-12-22 08:10:29,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-12-22 08:10:29,066 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:10:29,066 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] [2020-12-22 08:10:29,066 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 08:10:29,066 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:10:29,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:10:29,067 INFO L82 PathProgramCache]: Analyzing trace with hash -236553538, now seen corresponding path program 1 times [2020-12-22 08:10:29,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:10:29,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550556134] [2020-12-22 08:10:29,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:10:29,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:10:29,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:10:29,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550556134] [2020-12-22 08:10:29,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:10:29,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:10:29,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814537369] [2020-12-22 08:10:29,178 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:10:29,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:10:29,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:10:29,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:10:29,179 INFO L87 Difference]: Start difference. First operand 842 states and 1406 transitions. Second operand 3 states. [2020-12-22 08:10:29,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:10:29,238 INFO L93 Difference]: Finished difference Result 1462 states and 2452 transitions. [2020-12-22 08:10:29,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:10:29,238 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 117 [2020-12-22 08:10:29,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:10:29,246 INFO L225 Difference]: With dead ends: 1462 [2020-12-22 08:10:29,246 INFO L226 Difference]: Without dead ends: 1122 [2020-12-22 08:10:29,247 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:10:29,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1122 states. [2020-12-22 08:10:29,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1122 to 1120. [2020-12-22 08:10:29,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1120 states. [2020-12-22 08:10:29,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1120 states to 1120 states and 1872 transitions. [2020-12-22 08:10:29,294 INFO L78 Accepts]: Start accepts. Automaton has 1120 states and 1872 transitions. Word has length 117 [2020-12-22 08:10:29,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:10:29,294 INFO L481 AbstractCegarLoop]: Abstraction has 1120 states and 1872 transitions. [2020-12-22 08:10:29,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:10:29,295 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states and 1872 transitions. [2020-12-22 08:10:29,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-12-22 08:10:29,296 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:10:29,297 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] [2020-12-22 08:10:29,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 08:10:29,297 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:10:29,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:10:29,298 INFO L82 PathProgramCache]: Analyzing trace with hash 2147173936, now seen corresponding path program 1 times [2020-12-22 08:10:29,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:10:29,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741382366] [2020-12-22 08:10:29,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:10:29,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:10:29,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:10:29,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741382366] [2020-12-22 08:10:29,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:10:29,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:10:29,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461811687] [2020-12-22 08:10:29,477 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:10:29,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:10:29,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:10:29,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:10:29,480 INFO L87 Difference]: Start difference. First operand 1120 states and 1872 transitions. Second operand 3 states. [2020-12-22 08:10:29,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:10:29,594 INFO L93 Difference]: Finished difference Result 2861 states and 4787 transitions. [2020-12-22 08:10:29,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:10:29,597 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 117 [2020-12-22 08:10:29,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:10:29,609 INFO L225 Difference]: With dead ends: 2861 [2020-12-22 08:10:29,610 INFO L226 Difference]: Without dead ends: 1950 [2020-12-22 08:10:29,612 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:10:29,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1950 states. [2020-12-22 08:10:29,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1950 to 1948. [2020-12-22 08:10:29,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1948 states. [2020-12-22 08:10:29,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1948 states to 1948 states and 3243 transitions. [2020-12-22 08:10:29,710 INFO L78 Accepts]: Start accepts. Automaton has 1948 states and 3243 transitions. Word has length 117 [2020-12-22 08:10:29,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:10:29,710 INFO L481 AbstractCegarLoop]: Abstraction has 1948 states and 3243 transitions. [2020-12-22 08:10:29,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:10:29,711 INFO L276 IsEmpty]: Start isEmpty. Operand 1948 states and 3243 transitions. [2020-12-22 08:10:29,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-12-22 08:10:29,715 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:10:29,716 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] [2020-12-22 08:10:29,716 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 08:10:29,716 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:10:29,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:10:29,717 INFO L82 PathProgramCache]: Analyzing trace with hash 866565200, now seen corresponding path program 1 times [2020-12-22 08:10:29,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:10:29,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86852099] [2020-12-22 08:10:29,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:10:29,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:10:29,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:10:29,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86852099] [2020-12-22 08:10:29,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:10:29,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:10:29,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857107658] [2020-12-22 08:10:29,855 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:10:29,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:10:29,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:10:29,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:10:29,858 INFO L87 Difference]: Start difference. First operand 1948 states and 3243 transitions. Second operand 3 states. [2020-12-22 08:10:30,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:10:30,043 INFO L93 Difference]: Finished difference Result 3554 states and 5943 transitions. [2020-12-22 08:10:30,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:10:30,044 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 120 [2020-12-22 08:10:30,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:10:30,066 INFO L225 Difference]: With dead ends: 3554 [2020-12-22 08:10:30,066 INFO L226 Difference]: Without dead ends: 2643 [2020-12-22 08:10:30,069 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:10:30,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2643 states. [2020-12-22 08:10:30,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2643 to 2641. [2020-12-22 08:10:30,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2641 states. [2020-12-22 08:10:30,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2641 states to 2641 states and 4398 transitions. [2020-12-22 08:10:30,269 INFO L78 Accepts]: Start accepts. Automaton has 2641 states and 4398 transitions. Word has length 120 [2020-12-22 08:10:30,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:10:30,270 INFO L481 AbstractCegarLoop]: Abstraction has 2641 states and 4398 transitions. [2020-12-22 08:10:30,270 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:10:30,270 INFO L276 IsEmpty]: Start isEmpty. Operand 2641 states and 4398 transitions. [2020-12-22 08:10:30,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-12-22 08:10:30,272 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:10:30,272 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] [2020-12-22 08:10:30,273 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 08:10:30,273 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:10:30,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:10:30,275 INFO L82 PathProgramCache]: Analyzing trace with hash 83170558, now seen corresponding path program 1 times [2020-12-22 08:10:30,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:10:30,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367215897] [2020-12-22 08:10:30,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:10:30,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:10:30,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:10:30,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367215897] [2020-12-22 08:10:30,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:10:30,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:10:30,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315967213] [2020-12-22 08:10:30,417 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:10:30,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:10:30,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:10:30,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:10:30,418 INFO L87 Difference]: Start difference. First operand 2641 states and 4398 transitions. Second operand 3 states. [2020-12-22 08:10:30,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:10:30,735 INFO L93 Difference]: Finished difference Result 7226 states and 12005 transitions. [2020-12-22 08:10:30,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:10:30,736 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 120 [2020-12-22 08:10:30,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:10:30,765 INFO L225 Difference]: With dead ends: 7226 [2020-12-22 08:10:30,765 INFO L226 Difference]: Without dead ends: 4812 [2020-12-22 08:10:30,774 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:10:30,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4812 states. [2020-12-22 08:10:31,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4812 to 4810. [2020-12-22 08:10:31,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4810 states. [2020-12-22 08:10:31,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4810 states to 4810 states and 7944 transitions. [2020-12-22 08:10:31,062 INFO L78 Accepts]: Start accepts. Automaton has 4810 states and 7944 transitions. Word has length 120 [2020-12-22 08:10:31,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:10:31,063 INFO L481 AbstractCegarLoop]: Abstraction has 4810 states and 7944 transitions. [2020-12-22 08:10:31,063 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:10:31,063 INFO L276 IsEmpty]: Start isEmpty. Operand 4810 states and 7944 transitions. [2020-12-22 08:10:31,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-12-22 08:10:31,065 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:10:31,066 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] [2020-12-22 08:10:31,066 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 08:10:31,066 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:10:31,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:10:31,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1139352598, now seen corresponding path program 1 times [2020-12-22 08:10:31,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:10:31,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55710877] [2020-12-22 08:10:31,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:10:31,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:10:31,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:10:31,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55710877] [2020-12-22 08:10:31,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:10:31,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:10:31,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004516620] [2020-12-22 08:10:31,242 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:10:31,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:10:31,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:10:31,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:10:31,243 INFO L87 Difference]: Start difference. First operand 4810 states and 7944 transitions. Second operand 6 states. [2020-12-22 08:10:33,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:10:33,010 INFO L93 Difference]: Finished difference Result 29771 states and 49577 transitions. [2020-12-22 08:10:33,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 08:10:33,010 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 123 [2020-12-22 08:10:33,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:10:33,158 INFO L225 Difference]: With dead ends: 29771 [2020-12-22 08:10:33,159 INFO L226 Difference]: Without dead ends: 25188 [2020-12-22 08:10:33,174 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 08:10:33,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25188 states. [2020-12-22 08:10:34,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25188 to 9236. [2020-12-22 08:10:34,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9236 states. [2020-12-22 08:10:34,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9236 states to 9236 states and 15212 transitions. [2020-12-22 08:10:34,075 INFO L78 Accepts]: Start accepts. Automaton has 9236 states and 15212 transitions. Word has length 123 [2020-12-22 08:10:34,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:10:34,075 INFO L481 AbstractCegarLoop]: Abstraction has 9236 states and 15212 transitions. [2020-12-22 08:10:34,075 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:10:34,075 INFO L276 IsEmpty]: Start isEmpty. Operand 9236 states and 15212 transitions. [2020-12-22 08:10:34,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-12-22 08:10:34,077 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:10:34,077 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 08:10:34,078 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 08:10:34,078 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:10:34,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:10:34,078 INFO L82 PathProgramCache]: Analyzing trace with hash 893130139, now seen corresponding path program 1 times [2020-12-22 08:10:34,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:10:34,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243856051] [2020-12-22 08:10:34,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:10:34,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:10:34,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:10:34,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243856051] [2020-12-22 08:10:34,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:10:34,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:10:34,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301234607] [2020-12-22 08:10:34,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:10:34,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:10:34,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:10:34,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:10:34,247 INFO L87 Difference]: Start difference. First operand 9236 states and 15212 transitions. Second operand 4 states. [2020-12-22 08:10:35,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:10:35,799 INFO L93 Difference]: Finished difference Result 30029 states and 49739 transitions. [2020-12-22 08:10:35,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:10:35,800 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 124 [2020-12-22 08:10:35,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:10:35,849 INFO L225 Difference]: With dead ends: 30029 [2020-12-22 08:10:35,850 INFO L226 Difference]: Without dead ends: 21020 [2020-12-22 08:10:35,868 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 08:10:35,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21020 states. [2020-12-22 08:10:37,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21020 to 15091. [2020-12-22 08:10:37,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15091 states. [2020-12-22 08:10:37,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15091 states to 15091 states and 24876 transitions. [2020-12-22 08:10:37,192 INFO L78 Accepts]: Start accepts. Automaton has 15091 states and 24876 transitions. Word has length 124 [2020-12-22 08:10:37,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:10:37,192 INFO L481 AbstractCegarLoop]: Abstraction has 15091 states and 24876 transitions. [2020-12-22 08:10:37,192 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:10:37,192 INFO L276 IsEmpty]: Start isEmpty. Operand 15091 states and 24876 transitions. [2020-12-22 08:10:37,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-12-22 08:10:37,194 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:10:37,194 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 08:10:37,195 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 08:10:37,195 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:10:37,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:10:37,196 INFO L82 PathProgramCache]: Analyzing trace with hash -485089184, now seen corresponding path program 1 times [2020-12-22 08:10:37,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:10:37,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672481893] [2020-12-22 08:10:37,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:10:37,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:10:37,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:10:37,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672481893] [2020-12-22 08:10:37,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:10:37,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:10:37,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042123282] [2020-12-22 08:10:37,356 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:10:37,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:10:37,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:10:37,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:10:37,360 INFO L87 Difference]: Start difference. First operand 15091 states and 24876 transitions. Second operand 3 states. [2020-12-22 08:10:38,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:10:38,595 INFO L93 Difference]: Finished difference Result 28697 states and 47478 transitions. [2020-12-22 08:10:38,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:10:38,597 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 124 [2020-12-22 08:10:38,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:10:38,652 INFO L225 Difference]: With dead ends: 28697 [2020-12-22 08:10:38,653 INFO L226 Difference]: Without dead ends: 20733 [2020-12-22 08:10:38,668 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:10:38,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20733 states. [2020-12-22 08:10:40,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20733 to 20731. [2020-12-22 08:10:40,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20731 states. [2020-12-22 08:10:40,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20731 states to 20731 states and 34119 transitions. [2020-12-22 08:10:40,476 INFO L78 Accepts]: Start accepts. Automaton has 20731 states and 34119 transitions. Word has length 124 [2020-12-22 08:10:40,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:10:40,477 INFO L481 AbstractCegarLoop]: Abstraction has 20731 states and 34119 transitions. [2020-12-22 08:10:40,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:10:40,477 INFO L276 IsEmpty]: Start isEmpty. Operand 20731 states and 34119 transitions. [2020-12-22 08:10:40,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-12-22 08:10:40,479 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:10:40,479 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] [2020-12-22 08:10:40,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 08:10:40,480 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:10:40,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:10:40,480 INFO L82 PathProgramCache]: Analyzing trace with hash 1854726525, now seen corresponding path program 1 times [2020-12-22 08:10:40,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:10:40,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607013946] [2020-12-22 08:10:40,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:10:40,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:10:40,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:10:40,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607013946] [2020-12-22 08:10:40,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:10:40,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:10:40,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68802272] [2020-12-22 08:10:40,656 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:10:40,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:10:40,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:10:40,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:10:40,659 INFO L87 Difference]: Start difference. First operand 20731 states and 34119 transitions. Second operand 4 states. [2020-12-22 08:10:43,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:10:43,076 INFO L93 Difference]: Finished difference Result 67909 states and 112035 transitions. [2020-12-22 08:10:43,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:10:43,077 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 125 [2020-12-22 08:10:43,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:10:43,221 INFO L225 Difference]: With dead ends: 67909 [2020-12-22 08:10:43,221 INFO L226 Difference]: Without dead ends: 47423 [2020-12-22 08:10:43,258 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:10:43,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47423 states. [2020-12-22 08:10:45,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47423 to 33748. [2020-12-22 08:10:45,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33748 states. [2020-12-22 08:10:46,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33748 states to 33748 states and 55389 transitions. [2020-12-22 08:10:46,020 INFO L78 Accepts]: Start accepts. Automaton has 33748 states and 55389 transitions. Word has length 125 [2020-12-22 08:10:46,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:10:46,021 INFO L481 AbstractCegarLoop]: Abstraction has 33748 states and 55389 transitions. [2020-12-22 08:10:46,021 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:10:46,021 INFO L276 IsEmpty]: Start isEmpty. Operand 33748 states and 55389 transitions. [2020-12-22 08:10:46,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-12-22 08:10:46,023 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:10:46,023 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] [2020-12-22 08:10:46,024 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 08:10:46,024 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:10:46,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:10:46,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1604001442, now seen corresponding path program 1 times [2020-12-22 08:10:46,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:10:46,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597812096] [2020-12-22 08:10:46,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:10:46,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:10:46,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:10:46,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597812096] [2020-12-22 08:10:46,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:10:46,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:10:46,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141168300] [2020-12-22 08:10:46,130 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:10:46,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:10:46,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:10:46,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:10:46,131 INFO L87 Difference]: Start difference. First operand 33748 states and 55389 transitions. Second operand 4 states. [2020-12-22 08:10:50,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:10:50,089 INFO L93 Difference]: Finished difference Result 109323 states and 179874 transitions. [2020-12-22 08:10:50,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:10:50,090 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 126 [2020-12-22 08:10:50,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:10:50,287 INFO L225 Difference]: With dead ends: 109323 [2020-12-22 08:10:50,287 INFO L226 Difference]: Without dead ends: 75820 [2020-12-22 08:10:50,345 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 08:10:50,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75820 states. [2020-12-22 08:10:54,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75820 to 54641. [2020-12-22 08:10:54,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54641 states. [2020-12-22 08:10:54,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54641 states to 54641 states and 89427 transitions. [2020-12-22 08:10:54,322 INFO L78 Accepts]: Start accepts. Automaton has 54641 states and 89427 transitions. Word has length 126 [2020-12-22 08:10:54,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:10:54,322 INFO L481 AbstractCegarLoop]: Abstraction has 54641 states and 89427 transitions. [2020-12-22 08:10:54,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:10:54,323 INFO L276 IsEmpty]: Start isEmpty. Operand 54641 states and 89427 transitions. [2020-12-22 08:10:54,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-12-22 08:10:54,324 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:10:54,324 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 08:10:54,324 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 08:10:54,325 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:10:54,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:10:54,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1868950812, now seen corresponding path program 1 times [2020-12-22 08:10:54,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:10:54,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955498900] [2020-12-22 08:10:54,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:10:54,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:10:54,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:10:54,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955498900] [2020-12-22 08:10:54,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:10:54,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:10:54,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375183604] [2020-12-22 08:10:54,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:10:54,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:10:54,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:10:54,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:10:54,436 INFO L87 Difference]: Start difference. First operand 54641 states and 89427 transitions. Second operand 4 states. [2020-12-22 08:11:01,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:11:01,226 INFO L93 Difference]: Finished difference Result 175049 states and 287186 transitions. [2020-12-22 08:11:01,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:11:01,227 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 127 [2020-12-22 08:11:01,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:11:01,522 INFO L225 Difference]: With dead ends: 175049 [2020-12-22 08:11:01,522 INFO L226 Difference]: Without dead ends: 120653 [2020-12-22 08:11:01,595 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 08:11:01,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120653 states. [2020-12-22 08:11:07,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120653 to 87422. [2020-12-22 08:11:07,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87422 states. [2020-12-22 08:11:07,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87422 states to 87422 states and 142673 transitions. [2020-12-22 08:11:07,557 INFO L78 Accepts]: Start accepts. Automaton has 87422 states and 142673 transitions. Word has length 127 [2020-12-22 08:11:07,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:11:07,557 INFO L481 AbstractCegarLoop]: Abstraction has 87422 states and 142673 transitions. [2020-12-22 08:11:07,557 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:11:07,557 INFO L276 IsEmpty]: Start isEmpty. Operand 87422 states and 142673 transitions. [2020-12-22 08:11:07,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-22 08:11:07,558 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:11:07,558 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] [2020-12-22 08:11:07,559 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 08:11:07,559 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:11:07,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:11:07,559 INFO L82 PathProgramCache]: Analyzing trace with hash 2012261173, now seen corresponding path program 1 times [2020-12-22 08:11:07,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:11:07,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593566298] [2020-12-22 08:11:07,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:11:07,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:11:07,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:11:07,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593566298] [2020-12-22 08:11:07,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:11:07,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:11:07,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989469364] [2020-12-22 08:11:07,751 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:11:07,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:11:07,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:11:07,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:11:07,752 INFO L87 Difference]: Start difference. First operand 87422 states and 142673 transitions. Second operand 6 states. [2020-12-22 08:11:08,060 WARN L197 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-12-22 08:11:13,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:11:13,767 INFO L93 Difference]: Finished difference Result 174601 states and 284955 transitions. [2020-12-22 08:11:13,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:11:13,768 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 129 [2020-12-22 08:11:13,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:11:14,064 INFO L225 Difference]: With dead ends: 174601 [2020-12-22 08:11:14,064 INFO L226 Difference]: Without dead ends: 87424 [2020-12-22 08:11:14,135 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-12-22 08:11:14,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87424 states. [2020-12-22 08:11:19,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87424 to 87422. [2020-12-22 08:11:19,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87422 states. [2020-12-22 08:11:19,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87422 states to 87422 states and 142048 transitions. [2020-12-22 08:11:19,653 INFO L78 Accepts]: Start accepts. Automaton has 87422 states and 142048 transitions. Word has length 129 [2020-12-22 08:11:19,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:11:19,653 INFO L481 AbstractCegarLoop]: Abstraction has 87422 states and 142048 transitions. [2020-12-22 08:11:19,653 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:11:19,653 INFO L276 IsEmpty]: Start isEmpty. Operand 87422 states and 142048 transitions. [2020-12-22 08:11:19,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-12-22 08:11:19,655 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:11:19,655 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 08:11:19,655 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 08:11:19,655 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:11:19,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:11:19,656 INFO L82 PathProgramCache]: Analyzing trace with hash 365685076, now seen corresponding path program 1 times [2020-12-22 08:11:19,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:11:19,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449335783] [2020-12-22 08:11:19,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:11:19,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:11:19,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:11:19,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449335783] [2020-12-22 08:11:19,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:11:19,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:11:19,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110789843] [2020-12-22 08:11:19,878 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:11:19,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:11:19,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:11:19,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:11:19,880 INFO L87 Difference]: Start difference. First operand 87422 states and 142048 transitions. Second operand 6 states. [2020-12-22 08:11:36,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:11:36,349 INFO L93 Difference]: Finished difference Result 328443 states and 534734 transitions. [2020-12-22 08:11:36,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:11:36,350 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 132 [2020-12-22 08:11:36,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:11:37,082 INFO L225 Difference]: With dead ends: 328443 [2020-12-22 08:11:37,082 INFO L226 Difference]: Without dead ends: 241266 [2020-12-22 08:11:37,215 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:11:37,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241266 states. [2020-12-22 08:11:50,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241266 to 168414. [2020-12-22 08:11:50,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168414 states. [2020-12-22 08:11:50,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168414 states to 168414 states and 272047 transitions. [2020-12-22 08:11:50,908 INFO L78 Accepts]: Start accepts. Automaton has 168414 states and 272047 transitions. Word has length 132 [2020-12-22 08:11:50,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:11:50,908 INFO L481 AbstractCegarLoop]: Abstraction has 168414 states and 272047 transitions. [2020-12-22 08:11:50,908 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:11:50,909 INFO L276 IsEmpty]: Start isEmpty. Operand 168414 states and 272047 transitions. [2020-12-22 08:11:50,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-12-22 08:11:50,909 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:11:50,909 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 08:11:50,910 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 08:11:50,910 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:11:50,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:11:50,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1550573646, now seen corresponding path program 1 times [2020-12-22 08:11:50,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:11:50,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339226634] [2020-12-22 08:11:50,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:11:51,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:11:51,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:11:51,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339226634] [2020-12-22 08:11:51,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:11:51,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:11:51,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616856077] [2020-12-22 08:11:51,111 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:11:51,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:11:51,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:11:51,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:11:51,112 INFO L87 Difference]: Start difference. First operand 168414 states and 272047 transitions. Second operand 5 states. [2020-12-22 08:12:16,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:12:16,110 INFO L93 Difference]: Finished difference Result 327635 states and 527088 transitions. [2020-12-22 08:12:16,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:12:16,111 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 133 [2020-12-22 08:12:16,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:12:17,023 INFO L225 Difference]: With dead ends: 327635 [2020-12-22 08:12:17,023 INFO L226 Difference]: Without dead ends: 327633 [2020-12-22 08:12:17,125 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:12:17,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327633 states. [2020-12-22 08:12:32,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327633 to 172482. [2020-12-22 08:12:32,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172482 states. [2020-12-22 08:12:33,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172482 states to 172482 states and 276088 transitions. [2020-12-22 08:12:33,644 INFO L78 Accepts]: Start accepts. Automaton has 172482 states and 276088 transitions. Word has length 133 [2020-12-22 08:12:33,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:12:33,645 INFO L481 AbstractCegarLoop]: Abstraction has 172482 states and 276088 transitions. [2020-12-22 08:12:33,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:12:33,645 INFO L276 IsEmpty]: Start isEmpty. Operand 172482 states and 276088 transitions. [2020-12-22 08:12:33,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-12-22 08:12:33,666 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:12:33,666 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:12:33,667 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 08:12:33,667 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:12:33,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:12:33,667 INFO L82 PathProgramCache]: Analyzing trace with hash -2098432369, now seen corresponding path program 1 times [2020-12-22 08:12:33,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:12:33,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548692390] [2020-12-22 08:12:33,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:12:33,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:12:33,841 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 08:12:33,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548692390] [2020-12-22 08:12:33,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:12:33,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:12:33,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010294764] [2020-12-22 08:12:33,843 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:12:33,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:12:33,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:12:33,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:12:33,844 INFO L87 Difference]: Start difference. First operand 172482 states and 276088 transitions. Second operand 6 states. [2020-12-22 08:12:59,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:12:59,336 INFO L93 Difference]: Finished difference Result 359636 states and 578793 transitions. [2020-12-22 08:12:59,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:12:59,337 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 163 [2020-12-22 08:12:59,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:13:00,113 INFO L225 Difference]: With dead ends: 359636 [2020-12-22 08:13:00,113 INFO L226 Difference]: Without dead ends: 283834 [2020-12-22 08:13:00,268 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 08:13:00,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283834 states. [2020-12-22 08:13:20,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283834 to 225007. [2020-12-22 08:13:20,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225007 states. [2020-12-22 08:13:21,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225007 states to 225007 states and 360557 transitions. [2020-12-22 08:13:21,675 INFO L78 Accepts]: Start accepts. Automaton has 225007 states and 360557 transitions. Word has length 163 [2020-12-22 08:13:21,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:13:21,675 INFO L481 AbstractCegarLoop]: Abstraction has 225007 states and 360557 transitions. [2020-12-22 08:13:21,675 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:13:21,675 INFO L276 IsEmpty]: Start isEmpty. Operand 225007 states and 360557 transitions. [2020-12-22 08:13:21,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-12-22 08:13:21,698 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:13:21,699 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:13:21,699 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 08:13:21,699 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:13:21,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:13:21,700 INFO L82 PathProgramCache]: Analyzing trace with hash -903642171, now seen corresponding path program 1 times [2020-12-22 08:13:21,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:13:21,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445357109] [2020-12-22 08:13:21,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:13:21,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:13:21,844 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 08:13:21,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445357109] [2020-12-22 08:13:21,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:13:21,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:13:21,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244872987] [2020-12-22 08:13:21,845 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:13:21,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:13:21,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:13:21,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:13:21,846 INFO L87 Difference]: Start difference. First operand 225007 states and 360557 transitions. Second operand 6 states. [2020-12-22 08:13:52,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:13:52,058 INFO L93 Difference]: Finished difference Result 383820 states and 618017 transitions. [2020-12-22 08:13:52,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:13:52,058 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 163 [2020-12-22 08:13:52,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:13:52,772 INFO L225 Difference]: With dead ends: 383820 [2020-12-22 08:13:52,772 INFO L226 Difference]: Without dead ends: 308018 [2020-12-22 08:13:52,925 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 08:13:53,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308018 states.