/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/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 07:44:49,381 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 07:44:49,388 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 07:44:49,436 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 07:44:49,437 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 07:44:49,440 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 07:44:49,444 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 07:44:49,452 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 07:44:49,455 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 07:44:49,461 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 07:44:49,462 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 07:44:49,464 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 07:44:49,464 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 07:44:49,468 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 07:44:49,470 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 07:44:49,472 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 07:44:49,487 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 07:44:49,491 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 07:44:49,499 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 07:44:49,506 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 07:44:49,509 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 07:44:49,511 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 07:44:49,512 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 07:44:49,515 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 07:44:49,525 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 07:44:49,531 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 07:44:49,532 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 07:44:49,534 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 07:44:49,535 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 07:44:49,536 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 07:44:49,536 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 07:44:49,537 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 07:44:49,537 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 07:44:49,538 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 07:44:49,539 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 07:44:49,539 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 07:44:49,545 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 07:44:49,608 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 07:44:49,609 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 07:44:49,613 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 07:44:49,614 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 07:44:49,614 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 07:44:49,614 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 07:44:49,614 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 07:44:49,615 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 07:44:49,615 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 07:44:49,615 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 07:44:49,616 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 07:44:49,617 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 07:44:49,617 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 07:44:49,617 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 07:44:49,617 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 07:44:49,618 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 07:44:49,618 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 07:44:49,618 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:44:49,618 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 07:44:49,619 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 07:44:49,619 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 07:44:49,619 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 07:44:49,619 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 07:44:49,620 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 07:44:49,620 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 07:44:49,620 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 07:44:50,059 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 07:44:50,094 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 07:44:50,097 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 07:44:50,099 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 07:44:50,099 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 07:44:50,100 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c [2020-12-22 07:44:50,195 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba4c524bc/c4868ab8f77a4b2780e7ce10c05cf09c/FLAGb7c10d4e5 [2020-12-22 07:44:50,959 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 07:44:50,962 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c [2020-12-22 07:44:50,989 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba4c524bc/c4868ab8f77a4b2780e7ce10c05cf09c/FLAGb7c10d4e5 [2020-12-22 07:44:51,152 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba4c524bc/c4868ab8f77a4b2780e7ce10c05cf09c [2020-12-22 07:44:51,156 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 07:44:51,160 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 07:44:51,164 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 07:44:51,164 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 07:44:51,168 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 07:44:51,169 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:44:51" (1/1) ... [2020-12-22 07:44:51,171 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64c44cba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:44:51, skipping insertion in model container [2020-12-22 07:44:51,172 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:44:51" (1/1) ... [2020-12-22 07:44:51,180 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 07:44:51,263 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 07:44:51,818 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/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c[65679,65692] [2020-12-22 07:44:51,822 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:44:51,837 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 07:44:52,006 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/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c[65679,65692] [2020-12-22 07:44:52,007 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:44:52,032 INFO L208 MainTranslator]: Completed translation [2020-12-22 07:44:52,032 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:44:52 WrapperNode [2020-12-22 07:44:52,033 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 07:44:52,034 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 07:44:52,034 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 07:44:52,034 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 07:44:52,043 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:44:52" (1/1) ... [2020-12-22 07:44:52,068 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:44:52" (1/1) ... [2020-12-22 07:44:52,189 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 07:44:52,191 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 07:44:52,191 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 07:44:52,192 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 07:44:52,202 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:44:52" (1/1) ... [2020-12-22 07:44:52,203 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:44:52" (1/1) ... [2020-12-22 07:44:52,223 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:44:52" (1/1) ... [2020-12-22 07:44:52,223 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:44:52" (1/1) ... [2020-12-22 07:44:52,280 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:44:52" (1/1) ... [2020-12-22 07:44:52,341 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:44:52" (1/1) ... [2020-12-22 07:44:52,349 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:44:52" (1/1) ... [2020-12-22 07:44:52,360 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 07:44:52,361 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 07:44:52,361 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 07:44:52,361 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 07:44:52,362 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:44:52" (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 07:44:52,470 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 07:44:52,471 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 07:44:52,471 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 07:44:52,471 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 07:44:55,580 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 07:44:55,581 INFO L299 CfgBuilder]: Removed 23 assume(true) statements. [2020-12-22 07:44:55,584 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:44:55 BoogieIcfgContainer [2020-12-22 07:44:55,585 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 07:44:55,587 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 07:44:55,587 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 07:44:55,591 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 07:44:55,591 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:44:51" (1/3) ... [2020-12-22 07:44:55,592 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2952c9a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:44:55, skipping insertion in model container [2020-12-22 07:44:55,592 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:44:52" (2/3) ... [2020-12-22 07:44:55,593 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2952c9a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:44:55, skipping insertion in model container [2020-12-22 07:44:55,593 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:44:55" (3/3) ... [2020-12-22 07:44:55,595 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c [2020-12-22 07:44:55,602 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 07:44:55,609 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 07:44:55,630 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 07:44:55,665 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 07:44:55,665 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 07:44:55,665 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 07:44:55,665 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 07:44:55,666 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 07:44:55,666 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 07:44:55,666 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 07:44:55,666 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 07:44:55,718 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states. [2020-12-22 07:44:55,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-12-22 07:44:55,747 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:44:55,748 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:44:55,749 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:44:55,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:44:55,755 INFO L82 PathProgramCache]: Analyzing trace with hash 1610308336, now seen corresponding path program 1 times [2020-12-22 07:44:55,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:44:55,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279147547] [2020-12-22 07:44:55,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:44:56,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:44:56,453 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 07:44:56,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279147547] [2020-12-22 07:44:56,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:44:56,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:44:56,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859545020] [2020-12-22 07:44:56,462 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 07:44:56,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:44:56,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 07:44:56,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:44:56,480 INFO L87 Difference]: Start difference. First operand 745 states. Second operand 2 states. [2020-12-22 07:44:56,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:44:56,553 INFO L93 Difference]: Finished difference Result 936 states and 1705 transitions. [2020-12-22 07:44:56,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 07:44:56,555 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 153 [2020-12-22 07:44:56,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:44:56,582 INFO L225 Difference]: With dead ends: 936 [2020-12-22 07:44:56,583 INFO L226 Difference]: Without dead ends: 741 [2020-12-22 07:44:56,588 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:44:56,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2020-12-22 07:44:56,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 741. [2020-12-22 07:44:56,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 741 states. [2020-12-22 07:44:56,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 741 states to 741 states and 1365 transitions. [2020-12-22 07:44:56,721 INFO L78 Accepts]: Start accepts. Automaton has 741 states and 1365 transitions. Word has length 153 [2020-12-22 07:44:56,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:44:56,725 INFO L481 AbstractCegarLoop]: Abstraction has 741 states and 1365 transitions. [2020-12-22 07:44:56,725 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 07:44:56,725 INFO L276 IsEmpty]: Start isEmpty. Operand 741 states and 1365 transitions. [2020-12-22 07:44:56,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-12-22 07:44:56,737 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:44:56,738 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:44:56,739 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 07:44:56,739 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:44:56,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:44:56,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1100835246, now seen corresponding path program 1 times [2020-12-22 07:44:56,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:44:56,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770766196] [2020-12-22 07:44:56,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:44:56,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:44:57,036 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 07:44:57,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770766196] [2020-12-22 07:44:57,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:44:57,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:44:57,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070042188] [2020-12-22 07:44:57,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:44:57,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:44:57,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:44:57,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:44:57,041 INFO L87 Difference]: Start difference. First operand 741 states and 1365 transitions. Second operand 5 states. [2020-12-22 07:44:57,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:44:57,334 INFO L93 Difference]: Finished difference Result 935 states and 1698 transitions. [2020-12-22 07:44:57,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 07:44:57,335 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 153 [2020-12-22 07:44:57,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:44:57,342 INFO L225 Difference]: With dead ends: 935 [2020-12-22 07:44:57,342 INFO L226 Difference]: Without dead ends: 741 [2020-12-22 07:44:57,345 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:44:57,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2020-12-22 07:44:57,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 741. [2020-12-22 07:44:57,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 741 states. [2020-12-22 07:44:57,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 741 states to 741 states and 1300 transitions. [2020-12-22 07:44:57,369 INFO L78 Accepts]: Start accepts. Automaton has 741 states and 1300 transitions. Word has length 153 [2020-12-22 07:44:57,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:44:57,370 INFO L481 AbstractCegarLoop]: Abstraction has 741 states and 1300 transitions. [2020-12-22 07:44:57,370 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:44:57,370 INFO L276 IsEmpty]: Start isEmpty. Operand 741 states and 1300 transitions. [2020-12-22 07:44:57,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2020-12-22 07:44:57,374 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:44:57,375 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:44:57,375 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 07:44:57,375 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:44:57,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:44:57,376 INFO L82 PathProgramCache]: Analyzing trace with hash -698376180, now seen corresponding path program 1 times [2020-12-22 07:44:57,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:44:57,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043895826] [2020-12-22 07:44:57,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:44:57,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:44:57,760 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 07:44:57,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043895826] [2020-12-22 07:44:57,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:44:57,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:44:57,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851820015] [2020-12-22 07:44:57,763 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:44:57,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:44:57,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:44:57,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:44:57,764 INFO L87 Difference]: Start difference. First operand 741 states and 1300 transitions. Second operand 3 states. [2020-12-22 07:44:57,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:44:57,904 INFO L93 Difference]: Finished difference Result 1107 states and 1932 transitions. [2020-12-22 07:44:57,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:44:57,905 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 217 [2020-12-22 07:44:57,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:44:57,916 INFO L225 Difference]: With dead ends: 1107 [2020-12-22 07:44:57,916 INFO L226 Difference]: Without dead ends: 917 [2020-12-22 07:44:57,919 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 07:44:57,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 917 states. [2020-12-22 07:44:57,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 917 to 914. [2020-12-22 07:44:57,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 914 states. [2020-12-22 07:44:57,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 914 states to 914 states and 1595 transitions. [2020-12-22 07:44:57,971 INFO L78 Accepts]: Start accepts. Automaton has 914 states and 1595 transitions. Word has length 217 [2020-12-22 07:44:57,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:44:57,981 INFO L481 AbstractCegarLoop]: Abstraction has 914 states and 1595 transitions. [2020-12-22 07:44:57,981 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:44:57,981 INFO L276 IsEmpty]: Start isEmpty. Operand 914 states and 1595 transitions. [2020-12-22 07:44:57,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2020-12-22 07:44:57,986 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:44:57,987 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:44:57,987 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 07:44:57,987 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:44:57,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:44:57,988 INFO L82 PathProgramCache]: Analyzing trace with hash -128120140, now seen corresponding path program 1 times [2020-12-22 07:44:57,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:44:57,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368407784] [2020-12-22 07:44:57,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:44:58,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:44:58,339 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 07:44:58,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368407784] [2020-12-22 07:44:58,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:44:58,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:44:58,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630620005] [2020-12-22 07:44:58,342 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:44:58,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:44:58,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:44:58,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:44:58,344 INFO L87 Difference]: Start difference. First operand 914 states and 1595 transitions. Second operand 3 states. [2020-12-22 07:44:58,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:44:58,438 INFO L93 Difference]: Finished difference Result 1616 states and 2799 transitions. [2020-12-22 07:44:58,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:44:58,439 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 221 [2020-12-22 07:44:58,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:44:58,447 INFO L225 Difference]: With dead ends: 1616 [2020-12-22 07:44:58,447 INFO L226 Difference]: Without dead ends: 1253 [2020-12-22 07:44:58,448 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 07:44:58,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1253 states. [2020-12-22 07:44:58,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1253 to 1249. [2020-12-22 07:44:58,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1249 states. [2020-12-22 07:44:58,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1249 states to 1249 states and 2168 transitions. [2020-12-22 07:44:58,489 INFO L78 Accepts]: Start accepts. Automaton has 1249 states and 2168 transitions. Word has length 221 [2020-12-22 07:44:58,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:44:58,489 INFO L481 AbstractCegarLoop]: Abstraction has 1249 states and 2168 transitions. [2020-12-22 07:44:58,489 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:44:58,490 INFO L276 IsEmpty]: Start isEmpty. Operand 1249 states and 2168 transitions. [2020-12-22 07:44:58,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-12-22 07:44:58,494 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:44:58,495 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:44:58,495 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 07:44:58,495 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:44:58,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:44:58,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1683241124, now seen corresponding path program 1 times [2020-12-22 07:44:58,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:44:58,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894123260] [2020-12-22 07:44:58,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:44:58,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:44:58,748 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 07:44:58,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894123260] [2020-12-22 07:44:58,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:44:58,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:44:58,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907821741] [2020-12-22 07:44:58,749 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:44:58,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:44:58,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:44:58,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:44:58,753 INFO L87 Difference]: Start difference. First operand 1249 states and 2168 transitions. Second operand 3 states. [2020-12-22 07:44:58,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:44:58,837 INFO L93 Difference]: Finished difference Result 2597 states and 4474 transitions. [2020-12-22 07:44:58,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:44:58,838 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 225 [2020-12-22 07:44:58,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:44:58,849 INFO L225 Difference]: With dead ends: 2597 [2020-12-22 07:44:58,849 INFO L226 Difference]: Without dead ends: 1899 [2020-12-22 07:44:58,851 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 07:44:58,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1899 states. [2020-12-22 07:44:58,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1899 to 1893. [2020-12-22 07:44:58,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1893 states. [2020-12-22 07:44:58,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1893 states to 1893 states and 3264 transitions. [2020-12-22 07:44:58,912 INFO L78 Accepts]: Start accepts. Automaton has 1893 states and 3264 transitions. Word has length 225 [2020-12-22 07:44:58,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:44:58,912 INFO L481 AbstractCegarLoop]: Abstraction has 1893 states and 3264 transitions. [2020-12-22 07:44:58,913 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:44:58,913 INFO L276 IsEmpty]: Start isEmpty. Operand 1893 states and 3264 transitions. [2020-12-22 07:44:58,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2020-12-22 07:44:58,944 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:44:58,944 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:44:58,945 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 07:44:58,945 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:44:58,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:44:58,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1320539652, now seen corresponding path program 1 times [2020-12-22 07:44:58,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:44:58,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406734230] [2020-12-22 07:44:58,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:44:59,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:44:59,223 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 07:44:59,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406734230] [2020-12-22 07:44:59,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:44:59,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:44:59,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011952551] [2020-12-22 07:44:59,225 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:44:59,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:44:59,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:44:59,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:44:59,226 INFO L87 Difference]: Start difference. First operand 1893 states and 3264 transitions. Second operand 3 states. [2020-12-22 07:44:59,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:44:59,331 INFO L93 Difference]: Finished difference Result 4481 states and 7674 transitions. [2020-12-22 07:44:59,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:44:59,333 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 229 [2020-12-22 07:44:59,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:44:59,354 INFO L225 Difference]: With dead ends: 4481 [2020-12-22 07:44:59,354 INFO L226 Difference]: Without dead ends: 3139 [2020-12-22 07:44:59,358 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 07:44:59,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3139 states. [2020-12-22 07:44:59,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3139 to 3129. [2020-12-22 07:44:59,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3129 states. [2020-12-22 07:44:59,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3129 states to 3129 states and 5356 transitions. [2020-12-22 07:44:59,522 INFO L78 Accepts]: Start accepts. Automaton has 3129 states and 5356 transitions. Word has length 229 [2020-12-22 07:44:59,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:44:59,522 INFO L481 AbstractCegarLoop]: Abstraction has 3129 states and 5356 transitions. [2020-12-22 07:44:59,523 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:44:59,523 INFO L276 IsEmpty]: Start isEmpty. Operand 3129 states and 5356 transitions. [2020-12-22 07:44:59,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2020-12-22 07:44:59,529 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:44:59,530 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:44:59,530 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 07:44:59,530 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:44:59,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:44:59,536 INFO L82 PathProgramCache]: Analyzing trace with hash -2073741652, now seen corresponding path program 1 times [2020-12-22 07:44:59,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:44:59,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991904537] [2020-12-22 07:44:59,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:44:59,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:44:59,825 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 07:44:59,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991904537] [2020-12-22 07:44:59,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:44:59,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:44:59,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060549754] [2020-12-22 07:44:59,828 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:44:59,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:44:59,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:44:59,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:44:59,829 INFO L87 Difference]: Start difference. First operand 3129 states and 5356 transitions. Second operand 3 states. [2020-12-22 07:44:59,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:44:59,965 INFO L93 Difference]: Finished difference Result 8093 states and 13774 transitions. [2020-12-22 07:44:59,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:44:59,999 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 233 [2020-12-22 07:45:00,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:45:00,028 INFO L225 Difference]: With dead ends: 8093 [2020-12-22 07:45:00,028 INFO L226 Difference]: Without dead ends: 5515 [2020-12-22 07:45:00,037 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 07:45:00,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5515 states. [2020-12-22 07:45:00,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5515 to 5497. [2020-12-22 07:45:00,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5497 states. [2020-12-22 07:45:00,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5497 states to 5497 states and 9340 transitions. [2020-12-22 07:45:00,236 INFO L78 Accepts]: Start accepts. Automaton has 5497 states and 9340 transitions. Word has length 233 [2020-12-22 07:45:00,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:45:00,236 INFO L481 AbstractCegarLoop]: Abstraction has 5497 states and 9340 transitions. [2020-12-22 07:45:00,237 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:45:00,237 INFO L276 IsEmpty]: Start isEmpty. Operand 5497 states and 9340 transitions. [2020-12-22 07:45:00,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2020-12-22 07:45:00,244 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:45:00,244 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:45:00,244 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 07:45:00,245 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:45:00,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:45:00,245 INFO L82 PathProgramCache]: Analyzing trace with hash 337897812, now seen corresponding path program 1 times [2020-12-22 07:45:00,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:45:00,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079262290] [2020-12-22 07:45:00,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:45:00,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:45:00,593 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 07:45:00,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079262290] [2020-12-22 07:45:00,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:45:00,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 07:45:00,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424160363] [2020-12-22 07:45:00,595 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 07:45:00,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:45:00,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 07:45:00,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:45:00,596 INFO L87 Difference]: Start difference. First operand 5497 states and 9340 transitions. Second operand 7 states. [2020-12-22 07:45:01,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:45:01,764 INFO L93 Difference]: Finished difference Result 30955 states and 52693 transitions. [2020-12-22 07:45:01,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 07:45:01,765 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 237 [2020-12-22 07:45:01,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:45:01,879 INFO L225 Difference]: With dead ends: 30955 [2020-12-22 07:45:01,879 INFO L226 Difference]: Without dead ends: 26009 [2020-12-22 07:45:01,897 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2020-12-22 07:45:01,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26009 states. [2020-12-22 07:45:02,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26009 to 12716. [2020-12-22 07:45:02,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12716 states. [2020-12-22 07:45:02,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12716 states to 12716 states and 21610 transitions. [2020-12-22 07:45:02,547 INFO L78 Accepts]: Start accepts. Automaton has 12716 states and 21610 transitions. Word has length 237 [2020-12-22 07:45:02,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:45:02,547 INFO L481 AbstractCegarLoop]: Abstraction has 12716 states and 21610 transitions. [2020-12-22 07:45:02,548 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 07:45:02,548 INFO L276 IsEmpty]: Start isEmpty. Operand 12716 states and 21610 transitions. [2020-12-22 07:45:02,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2020-12-22 07:45:02,559 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:45:02,560 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:45:02,560 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 07:45:02,560 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:45:02,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:45:02,561 INFO L82 PathProgramCache]: Analyzing trace with hash -381481659, now seen corresponding path program 1 times [2020-12-22 07:45:02,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:45:02,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147893820] [2020-12-22 07:45:02,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:45:02,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:45:02,895 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 07:45:02,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147893820] [2020-12-22 07:45:02,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:45:02,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:45:02,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862522248] [2020-12-22 07:45:02,901 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:45:02,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:45:02,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:45:02,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:45:02,903 INFO L87 Difference]: Start difference. First operand 12716 states and 21610 transitions. Second operand 4 states. [2020-12-22 07:45:03,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:45:03,367 INFO L93 Difference]: Finished difference Result 29933 states and 50887 transitions. [2020-12-22 07:45:03,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:45:03,368 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 238 [2020-12-22 07:45:03,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:45:03,421 INFO L225 Difference]: With dead ends: 29933 [2020-12-22 07:45:03,422 INFO L226 Difference]: Without dead ends: 17768 [2020-12-22 07:45:03,445 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 07:45:03,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17768 states. [2020-12-22 07:45:03,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17768 to 17733. [2020-12-22 07:45:03,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17733 states. [2020-12-22 07:45:04,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17733 states to 17733 states and 30122 transitions. [2020-12-22 07:45:04,000 INFO L78 Accepts]: Start accepts. Automaton has 17733 states and 30122 transitions. Word has length 238 [2020-12-22 07:45:04,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:45:04,001 INFO L481 AbstractCegarLoop]: Abstraction has 17733 states and 30122 transitions. [2020-12-22 07:45:04,001 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:45:04,002 INFO L276 IsEmpty]: Start isEmpty. Operand 17733 states and 30122 transitions. [2020-12-22 07:45:04,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2020-12-22 07:45:04,014 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:45:04,014 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:45:04,014 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 07:45:04,015 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:45:04,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:45:04,015 INFO L82 PathProgramCache]: Analyzing trace with hash -1038404437, now seen corresponding path program 1 times [2020-12-22 07:45:04,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:45:04,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350681885] [2020-12-22 07:45:04,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:45:04,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:45:04,323 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 07:45:04,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350681885] [2020-12-22 07:45:04,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:45:04,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:45:04,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863209664] [2020-12-22 07:45:04,324 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:45:04,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:45:04,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:45:04,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:45:04,325 INFO L87 Difference]: Start difference. First operand 17733 states and 30122 transitions. Second operand 4 states. [2020-12-22 07:45:05,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:45:05,001 INFO L93 Difference]: Finished difference Result 52788 states and 89750 transitions. [2020-12-22 07:45:05,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:45:05,002 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 239 [2020-12-22 07:45:05,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:45:05,115 INFO L225 Difference]: With dead ends: 52788 [2020-12-22 07:45:05,115 INFO L226 Difference]: Without dead ends: 35606 [2020-12-22 07:45:05,147 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 07:45:05,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35606 states. [2020-12-22 07:45:06,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35606 to 26401. [2020-12-22 07:45:06,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26401 states. [2020-12-22 07:45:06,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26401 states to 26401 states and 44789 transitions. [2020-12-22 07:45:06,166 INFO L78 Accepts]: Start accepts. Automaton has 26401 states and 44789 transitions. Word has length 239 [2020-12-22 07:45:06,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:45:06,169 INFO L481 AbstractCegarLoop]: Abstraction has 26401 states and 44789 transitions. [2020-12-22 07:45:06,170 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:45:06,170 INFO L276 IsEmpty]: Start isEmpty. Operand 26401 states and 44789 transitions. [2020-12-22 07:45:06,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2020-12-22 07:45:06,186 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:45:06,187 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:45:06,187 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 07:45:06,187 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:45:06,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:45:06,188 INFO L82 PathProgramCache]: Analyzing trace with hash 240830268, now seen corresponding path program 1 times [2020-12-22 07:45:06,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:45:06,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051045564] [2020-12-22 07:45:06,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:45:06,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:45:06,620 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 07:45:06,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051045564] [2020-12-22 07:45:06,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:45:06,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:45:06,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583837135] [2020-12-22 07:45:06,622 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:45:06,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:45:06,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:45:06,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:45:06,624 INFO L87 Difference]: Start difference. First operand 26401 states and 44789 transitions. Second operand 4 states. [2020-12-22 07:45:07,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:45:07,882 INFO L93 Difference]: Finished difference Result 79117 states and 134376 transitions. [2020-12-22 07:45:07,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:45:07,883 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 240 [2020-12-22 07:45:07,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:45:08,113 INFO L225 Difference]: With dead ends: 79117 [2020-12-22 07:45:08,113 INFO L226 Difference]: Without dead ends: 53267 [2020-12-22 07:45:08,180 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 07:45:08,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53267 states. [2020-12-22 07:45:09,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53267 to 39309. [2020-12-22 07:45:09,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39309 states. [2020-12-22 07:45:09,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39309 states to 39309 states and 66612 transitions. [2020-12-22 07:45:09,638 INFO L78 Accepts]: Start accepts. Automaton has 39309 states and 66612 transitions. Word has length 240 [2020-12-22 07:45:09,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:45:09,638 INFO L481 AbstractCegarLoop]: Abstraction has 39309 states and 66612 transitions. [2020-12-22 07:45:09,639 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:45:09,639 INFO L276 IsEmpty]: Start isEmpty. Operand 39309 states and 66612 transitions. [2020-12-22 07:45:09,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-12-22 07:45:09,655 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:45:09,656 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:45:09,656 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 07:45:09,656 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:45:09,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:45:09,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1477358553, now seen corresponding path program 1 times [2020-12-22 07:45:09,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:45:09,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447689465] [2020-12-22 07:45:09,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:45:09,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:45:09,972 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 07:45:09,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447689465] [2020-12-22 07:45:09,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:45:09,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:45:09,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444825772] [2020-12-22 07:45:09,974 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:45:09,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:45:09,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:45:09,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:45:09,975 INFO L87 Difference]: Start difference. First operand 39309 states and 66612 transitions. Second operand 3 states. [2020-12-22 07:45:11,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:45:11,058 INFO L93 Difference]: Finished difference Result 91016 states and 154562 transitions. [2020-12-22 07:45:11,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:45:11,059 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 241 [2020-12-22 07:45:11,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:45:11,332 INFO L225 Difference]: With dead ends: 91016 [2020-12-22 07:45:11,332 INFO L226 Difference]: Without dead ends: 62445 [2020-12-22 07:45:11,405 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 07:45:11,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62445 states. [2020-12-22 07:45:12,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62445 to 62443. [2020-12-22 07:45:12,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62443 states. [2020-12-22 07:45:12,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62443 states to 62443 states and 105666 transitions. [2020-12-22 07:45:12,800 INFO L78 Accepts]: Start accepts. Automaton has 62443 states and 105666 transitions. Word has length 241 [2020-12-22 07:45:12,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:45:12,801 INFO L481 AbstractCegarLoop]: Abstraction has 62443 states and 105666 transitions. [2020-12-22 07:45:12,801 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:45:12,801 INFO L276 IsEmpty]: Start isEmpty. Operand 62443 states and 105666 transitions. [2020-12-22 07:45:12,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-12-22 07:45:12,809 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:45:12,810 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:45:12,810 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 07:45:12,810 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:45:12,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:45:12,811 INFO L82 PathProgramCache]: Analyzing trace with hash 384077095, now seen corresponding path program 1 times [2020-12-22 07:45:12,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:45:12,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102756040] [2020-12-22 07:45:12,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:45:12,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:45:13,216 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 07:45:13,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102756040] [2020-12-22 07:45:13,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:45:13,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:45:13,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126288863] [2020-12-22 07:45:13,217 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:45:13,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:45:13,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:45:13,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:45:13,219 INFO L87 Difference]: Start difference. First operand 62443 states and 105666 transitions. Second operand 3 states. [2020-12-22 07:45:14,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:45:14,515 INFO L93 Difference]: Finished difference Result 139378 states and 235916 transitions. [2020-12-22 07:45:14,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:45:14,516 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 241 [2020-12-22 07:45:14,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:45:14,972 INFO L225 Difference]: With dead ends: 139378 [2020-12-22 07:45:14,972 INFO L226 Difference]: Without dead ends: 96539 [2020-12-22 07:45:15,107 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 07:45:15,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96539 states. [2020-12-22 07:45:17,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96539 to 96537. [2020-12-22 07:45:17,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96537 states. [2020-12-22 07:45:17,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96537 states to 96537 states and 162877 transitions. [2020-12-22 07:45:17,558 INFO L78 Accepts]: Start accepts. Automaton has 96537 states and 162877 transitions. Word has length 241 [2020-12-22 07:45:17,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:45:17,559 INFO L481 AbstractCegarLoop]: Abstraction has 96537 states and 162877 transitions. [2020-12-22 07:45:17,559 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:45:17,560 INFO L276 IsEmpty]: Start isEmpty. Operand 96537 states and 162877 transitions. [2020-12-22 07:45:17,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-12-22 07:45:17,565 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:45:17,565 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:45:17,565 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 07:45:17,565 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:45:17,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:45:17,566 INFO L82 PathProgramCache]: Analyzing trace with hash 698928679, now seen corresponding path program 1 times [2020-12-22 07:45:17,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:45:17,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359438497] [2020-12-22 07:45:17,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:45:17,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:45:17,833 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 07:45:17,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359438497] [2020-12-22 07:45:17,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:45:17,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:45:17,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028485255] [2020-12-22 07:45:17,835 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:45:17,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:45:17,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:45:17,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:45:17,836 INFO L87 Difference]: Start difference. First operand 96537 states and 162877 transitions. Second operand 3 states. [2020-12-22 07:45:20,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:45:20,114 INFO L93 Difference]: Finished difference Result 214905 states and 362677 transitions. [2020-12-22 07:45:20,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:45:20,115 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 241 [2020-12-22 07:45:20,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:45:20,441 INFO L225 Difference]: With dead ends: 214905 [2020-12-22 07:45:20,441 INFO L226 Difference]: Without dead ends: 148403 [2020-12-22 07:45:20,538 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 07:45:20,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148403 states. [2020-12-22 07:45:23,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148403 to 148401. [2020-12-22 07:45:23,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148401 states. [2020-12-22 07:45:24,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148401 states to 148401 states and 249531 transitions. [2020-12-22 07:45:24,552 INFO L78 Accepts]: Start accepts. Automaton has 148401 states and 249531 transitions. Word has length 241 [2020-12-22 07:45:24,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:45:24,553 INFO L481 AbstractCegarLoop]: Abstraction has 148401 states and 249531 transitions. [2020-12-22 07:45:24,553 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:45:24,553 INFO L276 IsEmpty]: Start isEmpty. Operand 148401 states and 249531 transitions. [2020-12-22 07:45:24,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-12-22 07:45:24,558 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:45:24,558 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:45:24,558 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 07:45:24,558 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:45:24,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:45:24,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1094586151, now seen corresponding path program 1 times [2020-12-22 07:45:24,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:45:24,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112435955] [2020-12-22 07:45:24,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:45:24,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:45:24,779 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 07:45:24,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112435955] [2020-12-22 07:45:24,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:45:24,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:45:24,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851837454] [2020-12-22 07:45:24,782 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:45:24,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:45:24,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:45:24,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:45:24,783 INFO L87 Difference]: Start difference. First operand 148401 states and 249531 transitions. Second operand 3 states. [2020-12-22 07:45:28,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:45:28,124 INFO L93 Difference]: Finished difference Result 289986 states and 487947 transitions. [2020-12-22 07:45:28,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:45:28,125 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 241 [2020-12-22 07:45:28,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:45:28,565 INFO L225 Difference]: With dead ends: 289986 [2020-12-22 07:45:28,565 INFO L226 Difference]: Without dead ends: 209603 [2020-12-22 07:45:28,669 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 07:45:28,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209603 states. [2020-12-22 07:45:33,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209603 to 209601. [2020-12-22 07:45:33,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209601 states. [2020-12-22 07:45:34,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209601 states to 209601 states and 351353 transitions. [2020-12-22 07:45:34,031 INFO L78 Accepts]: Start accepts. Automaton has 209601 states and 351353 transitions. Word has length 241 [2020-12-22 07:45:34,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:45:34,032 INFO L481 AbstractCegarLoop]: Abstraction has 209601 states and 351353 transitions. [2020-12-22 07:45:34,032 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:45:34,032 INFO L276 IsEmpty]: Start isEmpty. Operand 209601 states and 351353 transitions. [2020-12-22 07:45:34,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-12-22 07:45:34,033 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:45:34,033 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:45:34,033 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 07:45:34,034 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:45:34,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:45:34,034 INFO L82 PathProgramCache]: Analyzing trace with hash -1096527833, now seen corresponding path program 1 times [2020-12-22 07:45:34,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:45:34,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505718704] [2020-12-22 07:45:34,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:45:34,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:45:34,671 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 07:45:34,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505718704] [2020-12-22 07:45:34,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:45:34,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:45:34,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848804082] [2020-12-22 07:45:34,673 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:45:34,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:45:34,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:45:34,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:45:34,674 INFO L87 Difference]: Start difference. First operand 209601 states and 351353 transitions. Second operand 3 states. [2020-12-22 07:45:39,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:45:39,292 INFO L93 Difference]: Finished difference Result 406666 states and 682259 transitions. [2020-12-22 07:45:39,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:45:39,292 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 241 [2020-12-22 07:45:39,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:45:39,897 INFO L225 Difference]: With dead ends: 406666 [2020-12-22 07:45:39,897 INFO L226 Difference]: Without dead ends: 293743 [2020-12-22 07:45:40,036 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 07:45:40,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293743 states. [2020-12-22 07:45:46,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293743 to 293741. [2020-12-22 07:45:46,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 293741 states. [2020-12-22 07:45:47,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293741 states to 293741 states and 490720 transitions. [2020-12-22 07:45:47,761 INFO L78 Accepts]: Start accepts. Automaton has 293741 states and 490720 transitions. Word has length 241 [2020-12-22 07:45:47,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:45:47,761 INFO L481 AbstractCegarLoop]: Abstraction has 293741 states and 490720 transitions. [2020-12-22 07:45:47,761 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:45:47,761 INFO L276 IsEmpty]: Start isEmpty. Operand 293741 states and 490720 transitions. [2020-12-22 07:45:47,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-12-22 07:45:47,764 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:45:47,764 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:45:47,764 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 07:45:47,764 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:45:47,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:45:47,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1411404802, now seen corresponding path program 1 times [2020-12-22 07:45:47,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:45:47,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194474330] [2020-12-22 07:45:47,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:45:47,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:45:47,985 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 07:45:47,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194474330] [2020-12-22 07:45:47,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:45:47,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:45:47,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113974876] [2020-12-22 07:45:47,988 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:45:47,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:45:47,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:45:47,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:45:47,989 INFO L87 Difference]: Start difference. First operand 293741 states and 490720 transitions. Second operand 4 states. [2020-12-22 07:45:59,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:45:59,571 INFO L93 Difference]: Finished difference Result 970895 states and 1623622 transitions. [2020-12-22 07:45:59,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:45:59,572 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 241 [2020-12-22 07:45:59,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:46:01,241 INFO L225 Difference]: With dead ends: 970895 [2020-12-22 07:46:01,242 INFO L226 Difference]: Without dead ends: 677787 [2020-12-22 07:46:01,578 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 07:46:02,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677787 states. [2020-12-22 07:46:18,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677787 to 479888. [2020-12-22 07:46:18,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 479888 states. [2020-12-22 07:46:20,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479888 states to 479888 states and 799756 transitions. [2020-12-22 07:46:20,456 INFO L78 Accepts]: Start accepts. Automaton has 479888 states and 799756 transitions. Word has length 241 [2020-12-22 07:46:20,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:46:20,456 INFO L481 AbstractCegarLoop]: Abstraction has 479888 states and 799756 transitions. [2020-12-22 07:46:20,456 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:46:20,457 INFO L276 IsEmpty]: Start isEmpty. Operand 479888 states and 799756 transitions. [2020-12-22 07:46:20,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2020-12-22 07:46:20,477 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:46:20,479 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:46:20,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 07:46:20,479 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:46:20,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:46:20,481 INFO L82 PathProgramCache]: Analyzing trace with hash -786485965, now seen corresponding path program 1 times [2020-12-22 07:46:20,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:46:20,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363546181] [2020-12-22 07:46:20,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:46:20,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:46:20,674 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 07:46:20,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363546181] [2020-12-22 07:46:20,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:46:20,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:46:20,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434237532] [2020-12-22 07:46:20,675 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:46:20,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:46:20,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:46:20,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:46:20,676 INFO L87 Difference]: Start difference. First operand 479888 states and 799756 transitions. Second operand 4 states. [2020-12-22 07:46:40,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:46:40,666 INFO L93 Difference]: Finished difference Result 1553379 states and 2591719 transitions. [2020-12-22 07:46:40,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:46:40,667 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 242 [2020-12-22 07:46:40,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:46:43,974 INFO L225 Difference]: With dead ends: 1553379 [2020-12-22 07:46:43,974 INFO L226 Difference]: Without dead ends: 1074124 [2020-12-22 07:46:44,862 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 07:46:45,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1074124 states. [2020-12-22 07:47:13,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1074124 to 775639. [2020-12-22 07:47:13,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 775639 states. [2020-12-22 07:47:18,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775639 states to 775639 states and 1289584 transitions. [2020-12-22 07:47:18,880 INFO L78 Accepts]: Start accepts. Automaton has 775639 states and 1289584 transitions. Word has length 242 [2020-12-22 07:47:18,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:47:18,881 INFO L481 AbstractCegarLoop]: Abstraction has 775639 states and 1289584 transitions. [2020-12-22 07:47:18,881 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:47:18,882 INFO L276 IsEmpty]: Start isEmpty. Operand 775639 states and 1289584 transitions. [2020-12-22 07:47:18,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2020-12-22 07:47:18,887 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:47:18,887 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:47:18,888 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 07:47:18,888 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:47:18,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:47:18,888 INFO L82 PathProgramCache]: Analyzing trace with hash 2091464427, now seen corresponding path program 1 times [2020-12-22 07:47:18,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:47:18,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013385536] [2020-12-22 07:47:18,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:47:19,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:47:20,251 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 07:47:20,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013385536] [2020-12-22 07:47:20,251 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:47:20,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 07:47:20,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136804822] [2020-12-22 07:47:20,255 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 07:47:20,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:47:20,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 07:47:20,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:47:20,256 INFO L87 Difference]: Start difference. First operand 775639 states and 1289584 transitions. Second operand 7 states.