/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 08:10:28,671 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 08:10:28,677 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 08:10:28,738 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 08:10:28,738 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 08:10:28,744 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 08:10:28,748 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 08:10:28,757 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 08:10:28,761 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 08:10:28,768 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 08:10:28,770 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 08:10:28,773 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 08:10:28,773 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 08:10:28,777 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 08:10:28,779 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 08:10:28,782 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 08:10:28,794 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 08:10:28,798 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 08:10:28,800 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 08:10:28,805 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 08:10:28,809 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 08:10:28,811 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 08:10:28,812 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 08:10:28,815 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 08:10:28,827 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-22 08:10:28,828 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-22 08:10:28,828 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-22 08:10:28,831 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-22 08:10:28,832 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-22 08:10:28,833 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-22 08:10:28,833 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 08:10:28,834 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 08:10:28,836 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 08:10:28,837 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 08:10:28,838 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 08:10:28,838 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 08:10:28,839 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 08:10:28,839 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 08:10:28,840 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 08:10:28,841 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 08:10:28,841 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 08:10:28,843 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 08:10:28,901 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 08:10:28,901 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 08:10:28,906 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 08:10:28,906 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 08:10:28,906 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 08:10:28,907 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 08:10:28,907 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 08:10:28,907 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 08:10:28,907 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 08:10:28,908 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 08:10:28,909 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 08:10:28,909 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 08:10:28,909 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 08:10:28,910 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 08:10:28,910 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 08:10:28,910 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 08:10:28,910 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 08:10:28,911 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 08:10:28,911 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 08:10:28,911 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 08:10:28,912 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 08:10:28,912 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 08:10:28,912 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 08:10:28,912 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 08:10:28,913 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 08:10:28,913 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 08:10:29,343 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 08:10:29,393 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 08:10:29,397 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 08:10:29,399 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 08:10:29,400 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 08:10:29,401 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-12-22 08:10:29,497 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6209bac98/e81d78947ce7448b96597fe89b75923b/FLAG1ef52fe66 [2020-12-22 08:10:30,321 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 08:10:30,322 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-12-22 08:10:30,344 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6209bac98/e81d78947ce7448b96597fe89b75923b/FLAG1ef52fe66 [2020-12-22 08:10:30,562 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6209bac98/e81d78947ce7448b96597fe89b75923b [2020-12-22 08:10:30,565 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 08:10:30,567 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 08:10:30,571 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 08:10:30,571 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 08:10:30,575 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 08:10:30,576 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:10:30" (1/1) ... [2020-12-22 08:10:30,578 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4667f99a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:10:30, skipping insertion in model container [2020-12-22 08:10:30,578 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:10:30" (1/1) ... [2020-12-22 08:10:30,586 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 08:10:30,672 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 08:10:31,030 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[12582,12595] [2020-12-22 08:10:31,102 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:10:31,120 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 08:10:31,225 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[12582,12595] [2020-12-22 08:10:31,324 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:10:31,350 INFO L208 MainTranslator]: Completed translation [2020-12-22 08:10:31,350 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:10:31 WrapperNode [2020-12-22 08:10:31,350 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 08:10:31,352 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 08:10:31,352 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 08:10:31,352 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 08:10:31,361 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:10:31" (1/1) ... [2020-12-22 08:10:31,382 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:10:31" (1/1) ... [2020-12-22 08:10:31,459 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 08:10:31,460 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 08:10:31,461 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 08:10:31,461 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 08:10:31,472 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:10:31" (1/1) ... [2020-12-22 08:10:31,472 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:10:31" (1/1) ... [2020-12-22 08:10:31,486 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:10:31" (1/1) ... [2020-12-22 08:10:31,486 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:10:31" (1/1) ... [2020-12-22 08:10:31,523 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:10:31" (1/1) ... [2020-12-22 08:10:31,554 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:10:31" (1/1) ... [2020-12-22 08:10:31,561 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:10:31" (1/1) ... [2020-12-22 08:10:31,577 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 08:10:31,578 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 08:10:31,578 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 08:10:31,578 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 08:10:31,580 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:10:31" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 08:10:31,698 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 08:10:31,698 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 08:10:31,698 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 08:10:31,698 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 08:10:33,299 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 08:10:33,300 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 08:10:33,302 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:10:33 BoogieIcfgContainer [2020-12-22 08:10:33,303 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 08:10:33,304 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 08:10:33,305 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 08:10:33,308 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 08:10:33,309 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 08:10:30" (1/3) ... [2020-12-22 08:10:33,309 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1edcccf7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:10:33, skipping insertion in model container [2020-12-22 08:10:33,310 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:10:31" (2/3) ... [2020-12-22 08:10:33,310 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1edcccf7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:10:33, skipping insertion in model container [2020-12-22 08:10:33,310 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:10:33" (3/3) ... [2020-12-22 08:10:33,312 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-12-22 08:10:33,318 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 08:10:33,324 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 08:10:33,343 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 08:10:33,374 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 08:10:33,374 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 08:10:33,374 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 08:10:33,374 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 08:10:33,374 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 08:10:33,375 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 08:10:33,375 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 08:10:33,375 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 08:10:33,398 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states. [2020-12-22 08:10:33,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-12-22 08:10:33,414 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:10:33,415 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] [2020-12-22 08:10:33,415 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:10:33,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:10:33,422 INFO L82 PathProgramCache]: Analyzing trace with hash 430105228, now seen corresponding path program 1 times [2020-12-22 08:10:33,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:10:33,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249541036] [2020-12-22 08:10:33,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:10:33,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:10:34,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:10:34,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249541036] [2020-12-22 08:10:34,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:10:34,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:10:34,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355663708] [2020-12-22 08:10:34,061 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:10:34,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:10:34,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:10:34,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:10:34,079 INFO L87 Difference]: Start difference. First operand 326 states. Second operand 3 states. [2020-12-22 08:10:34,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:10:34,281 INFO L93 Difference]: Finished difference Result 589 states and 1021 transitions. [2020-12-22 08:10:34,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:10:34,284 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 110 [2020-12-22 08:10:34,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:10:34,327 INFO L225 Difference]: With dead ends: 589 [2020-12-22 08:10:34,327 INFO L226 Difference]: Without dead ends: 446 [2020-12-22 08:10:34,331 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:10:34,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2020-12-22 08:10:34,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 443. [2020-12-22 08:10:34,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 443 states. [2020-12-22 08:10:34,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 734 transitions. [2020-12-22 08:10:34,427 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 734 transitions. Word has length 110 [2020-12-22 08:10:34,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:10:34,428 INFO L481 AbstractCegarLoop]: Abstraction has 443 states and 734 transitions. [2020-12-22 08:10:34,428 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:10:34,428 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 734 transitions. [2020-12-22 08:10:34,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-12-22 08:10:34,437 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:10:34,438 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] [2020-12-22 08:10:34,438 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 08:10:34,438 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:10:34,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:10:34,440 INFO L82 PathProgramCache]: Analyzing trace with hash 1228540371, now seen corresponding path program 1 times [2020-12-22 08:10:34,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:10:34,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363158140] [2020-12-22 08:10:34,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:10:34,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:10:34,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:10:34,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363158140] [2020-12-22 08:10:34,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:10:34,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:10:34,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871616172] [2020-12-22 08:10:34,769 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:10:34,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:10:34,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:10:34,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:10:34,770 INFO L87 Difference]: Start difference. First operand 443 states and 734 transitions. Second operand 3 states. [2020-12-22 08:10:34,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:10:34,892 INFO L93 Difference]: Finished difference Result 933 states and 1550 transitions. [2020-12-22 08:10:34,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:10:34,893 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 113 [2020-12-22 08:10:34,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:10:34,899 INFO L225 Difference]: With dead ends: 933 [2020-12-22 08:10:34,900 INFO L226 Difference]: Without dead ends: 679 [2020-12-22 08:10:34,902 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:10:34,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2020-12-22 08:10:34,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 675. [2020-12-22 08:10:34,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 675 states. [2020-12-22 08:10:34,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 1118 transitions. [2020-12-22 08:10:34,997 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 1118 transitions. Word has length 113 [2020-12-22 08:10:34,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:10:34,998 INFO L481 AbstractCegarLoop]: Abstraction has 675 states and 1118 transitions. [2020-12-22 08:10:34,998 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:10:34,998 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 1118 transitions. [2020-12-22 08:10:35,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-12-22 08:10:35,014 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:10:35,015 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] [2020-12-22 08:10:35,015 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 08:10:35,017 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:10:35,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:10:35,019 INFO L82 PathProgramCache]: Analyzing trace with hash 1403707664, now seen corresponding path program 1 times [2020-12-22 08:10:35,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:10:35,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366878219] [2020-12-22 08:10:35,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:10:35,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:10:35,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:10:35,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366878219] [2020-12-22 08:10:35,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:10:35,210 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:10:35,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396480515] [2020-12-22 08:10:35,211 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:10:35,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:10:35,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:10:35,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:10:35,212 INFO L87 Difference]: Start difference. First operand 675 states and 1118 transitions. Second operand 3 states. [2020-12-22 08:10:35,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:10:35,297 INFO L93 Difference]: Finished difference Result 1611 states and 2668 transitions. [2020-12-22 08:10:35,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:10:35,298 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 116 [2020-12-22 08:10:35,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:10:35,306 INFO L225 Difference]: With dead ends: 1611 [2020-12-22 08:10:35,306 INFO L226 Difference]: Without dead ends: 1125 [2020-12-22 08:10:35,308 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:10:35,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1125 states. [2020-12-22 08:10:35,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1125 to 1119. [2020-12-22 08:10:35,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1119 states. [2020-12-22 08:10:35,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 1846 transitions. [2020-12-22 08:10:35,382 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 1846 transitions. Word has length 116 [2020-12-22 08:10:35,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:10:35,392 INFO L481 AbstractCegarLoop]: Abstraction has 1119 states and 1846 transitions. [2020-12-22 08:10:35,393 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:10:35,394 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 1846 transitions. [2020-12-22 08:10:35,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-12-22 08:10:35,398 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:10:35,398 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] [2020-12-22 08:10:35,398 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 08:10:35,399 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:10:35,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:10:35,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1658128561, now seen corresponding path program 1 times [2020-12-22 08:10:35,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:10:35,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641638121] [2020-12-22 08:10:35,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:10:35,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:10:35,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:10:35,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641638121] [2020-12-22 08:10:35,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:10:35,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:10:35,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173114921] [2020-12-22 08:10:35,600 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:10:35,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:10:35,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:10:35,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:10:35,602 INFO L87 Difference]: Start difference. First operand 1119 states and 1846 transitions. Second operand 3 states. [2020-12-22 08:10:35,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:10:35,762 INFO L93 Difference]: Finished difference Result 2907 states and 4784 transitions. [2020-12-22 08:10:35,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:10:35,763 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 119 [2020-12-22 08:10:35,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:10:35,777 INFO L225 Difference]: With dead ends: 2907 [2020-12-22 08:10:35,777 INFO L226 Difference]: Without dead ends: 1977 [2020-12-22 08:10:35,780 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:10:35,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1977 states. [2020-12-22 08:10:35,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1977 to 1967. [2020-12-22 08:10:35,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1967 states. [2020-12-22 08:10:35,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1967 states to 1967 states and 3222 transitions. [2020-12-22 08:10:35,909 INFO L78 Accepts]: Start accepts. Automaton has 1967 states and 3222 transitions. Word has length 119 [2020-12-22 08:10:35,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:10:35,909 INFO L481 AbstractCegarLoop]: Abstraction has 1967 states and 3222 transitions. [2020-12-22 08:10:35,909 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:10:35,910 INFO L276 IsEmpty]: Start isEmpty. Operand 1967 states and 3222 transitions. [2020-12-22 08:10:35,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-12-22 08:10:35,914 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:10:35,915 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] [2020-12-22 08:10:35,915 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 08:10:35,915 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:10:35,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:10:35,918 INFO L82 PathProgramCache]: Analyzing trace with hash 1735235476, now seen corresponding path program 1 times [2020-12-22 08:10:35,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:10:35,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973151690] [2020-12-22 08:10:35,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:10:35,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:10:36,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:10:36,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973151690] [2020-12-22 08:10:36,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:10:36,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:10:36,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577853272] [2020-12-22 08:10:36,136 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:10:36,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:10:36,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:10:36,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:10:36,139 INFO L87 Difference]: Start difference. First operand 1967 states and 3222 transitions. Second operand 6 states. [2020-12-22 08:10:37,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:10:37,056 INFO L93 Difference]: Finished difference Result 8371 states and 13812 transitions. [2020-12-22 08:10:37,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 08:10:37,059 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 122 [2020-12-22 08:10:37,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:10:37,106 INFO L225 Difference]: With dead ends: 8371 [2020-12-22 08:10:37,106 INFO L226 Difference]: Without dead ends: 6593 [2020-12-22 08:10:37,112 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 08:10:37,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6593 states. [2020-12-22 08:10:37,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6593 to 4691. [2020-12-22 08:10:37,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4691 states. [2020-12-22 08:10:37,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4691 states to 4691 states and 7712 transitions. [2020-12-22 08:10:37,548 INFO L78 Accepts]: Start accepts. Automaton has 4691 states and 7712 transitions. Word has length 122 [2020-12-22 08:10:37,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:10:37,549 INFO L481 AbstractCegarLoop]: Abstraction has 4691 states and 7712 transitions. [2020-12-22 08:10:37,549 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:10:37,549 INFO L276 IsEmpty]: Start isEmpty. Operand 4691 states and 7712 transitions. [2020-12-22 08:10:37,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-12-22 08:10:37,553 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:10:37,553 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:10:37,553 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 08:10:37,554 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:10:37,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:10:37,554 INFO L82 PathProgramCache]: Analyzing trace with hash -2109337106, now seen corresponding path program 1 times [2020-12-22 08:10:37,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:10:37,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233020092] [2020-12-22 08:10:37,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:10:37,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:10:37,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:10:37,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233020092] [2020-12-22 08:10:37,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:10:37,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:10:37,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129216142] [2020-12-22 08:10:37,739 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:10:37,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:10:37,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:10:37,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:10:37,741 INFO L87 Difference]: Start difference. First operand 4691 states and 7712 transitions. Second operand 4 states. [2020-12-22 08:10:38,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:10:38,377 INFO L93 Difference]: Finished difference Result 11831 states and 19533 transitions. [2020-12-22 08:10:38,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:10:38,377 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 123 [2020-12-22 08:10:38,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:10:38,420 INFO L225 Difference]: With dead ends: 11831 [2020-12-22 08:10:38,420 INFO L226 Difference]: Without dead ends: 7329 [2020-12-22 08:10:38,430 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:10:38,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7329 states. [2020-12-22 08:10:38,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7329 to 6819. [2020-12-22 08:10:38,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6819 states. [2020-12-22 08:10:38,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6819 states to 6819 states and 11232 transitions. [2020-12-22 08:10:38,983 INFO L78 Accepts]: Start accepts. Automaton has 6819 states and 11232 transitions. Word has length 123 [2020-12-22 08:10:38,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:10:38,983 INFO L481 AbstractCegarLoop]: Abstraction has 6819 states and 11232 transitions. [2020-12-22 08:10:38,983 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:10:38,983 INFO L276 IsEmpty]: Start isEmpty. Operand 6819 states and 11232 transitions. [2020-12-22 08:10:38,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-12-22 08:10:38,989 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:10:38,989 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:10:38,990 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 08:10:38,990 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:10:38,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:10:38,997 INFO L82 PathProgramCache]: Analyzing trace with hash -1027444837, now seen corresponding path program 1 times [2020-12-22 08:10:38,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:10:38,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663051466] [2020-12-22 08:10:38,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:10:39,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:10:39,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:10:39,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663051466] [2020-12-22 08:10:39,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:10:39,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:10:39,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262291808] [2020-12-22 08:10:39,125 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:10:39,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:10:39,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:10:39,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:10:39,134 INFO L87 Difference]: Start difference. First operand 6819 states and 11232 transitions. Second operand 4 states. [2020-12-22 08:10:40,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:10:40,070 INFO L93 Difference]: Finished difference Result 17842 states and 29452 transitions. [2020-12-22 08:10:40,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:10:40,070 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 124 [2020-12-22 08:10:40,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:10:40,137 INFO L225 Difference]: With dead ends: 17842 [2020-12-22 08:10:40,138 INFO L226 Difference]: Without dead ends: 11212 [2020-12-22 08:10:40,153 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:10:40,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11212 states. [2020-12-22 08:10:40,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11212 to 9771. [2020-12-22 08:10:40,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9771 states. [2020-12-22 08:10:40,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9771 states to 9771 states and 16083 transitions. [2020-12-22 08:10:40,888 INFO L78 Accepts]: Start accepts. Automaton has 9771 states and 16083 transitions. Word has length 124 [2020-12-22 08:10:40,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:10:40,889 INFO L481 AbstractCegarLoop]: Abstraction has 9771 states and 16083 transitions. [2020-12-22 08:10:40,889 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:10:40,889 INFO L276 IsEmpty]: Start isEmpty. Operand 9771 states and 16083 transitions. [2020-12-22 08:10:40,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-12-22 08:10:40,895 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:10:40,896 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:10:40,896 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 08:10:40,896 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:10:40,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:10:40,897 INFO L82 PathProgramCache]: Analyzing trace with hash -275676370, now seen corresponding path program 1 times [2020-12-22 08:10:40,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:10:40,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607438014] [2020-12-22 08:10:40,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:10:40,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:10:41,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:10:41,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607438014] [2020-12-22 08:10:41,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:10:41,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:10:41,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188569797] [2020-12-22 08:10:41,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:10:41,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:10:41,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:10:41,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:10:41,005 INFO L87 Difference]: Start difference. First operand 9771 states and 16083 transitions. Second operand 3 states. [2020-12-22 08:10:42,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:10:42,014 INFO L93 Difference]: Finished difference Result 19632 states and 32392 transitions. [2020-12-22 08:10:42,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:10:42,015 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 125 [2020-12-22 08:10:42,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:10:42,060 INFO L225 Difference]: With dead ends: 19632 [2020-12-22 08:10:42,060 INFO L226 Difference]: Without dead ends: 14134 [2020-12-22 08:10:42,074 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:10:42,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14134 states. [2020-12-22 08:10:43,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14134 to 14132. [2020-12-22 08:10:43,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14132 states. [2020-12-22 08:10:43,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14132 states to 14132 states and 23224 transitions. [2020-12-22 08:10:43,107 INFO L78 Accepts]: Start accepts. Automaton has 14132 states and 23224 transitions. Word has length 125 [2020-12-22 08:10:43,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:10:43,108 INFO L481 AbstractCegarLoop]: Abstraction has 14132 states and 23224 transitions. [2020-12-22 08:10:43,108 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:10:43,108 INFO L276 IsEmpty]: Start isEmpty. Operand 14132 states and 23224 transitions. [2020-12-22 08:10:43,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-12-22 08:10:43,112 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:10:43,112 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:10:43,112 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 08:10:43,113 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:10:43,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:10:43,113 INFO L82 PathProgramCache]: Analyzing trace with hash 15369622, now seen corresponding path program 1 times [2020-12-22 08:10:43,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:10:43,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296806695] [2020-12-22 08:10:43,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:10:43,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:10:43,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:10:43,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296806695] [2020-12-22 08:10:43,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:10:43,236 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:10:43,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325182859] [2020-12-22 08:10:43,237 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:10:43,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:10:43,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:10:43,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:10:43,239 INFO L87 Difference]: Start difference. First operand 14132 states and 23224 transitions. Second operand 3 states. [2020-12-22 08:10:44,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:10:44,511 INFO L93 Difference]: Finished difference Result 27858 states and 45917 transitions. [2020-12-22 08:10:44,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:10:44,512 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 125 [2020-12-22 08:10:44,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:10:44,565 INFO L225 Difference]: With dead ends: 27858 [2020-12-22 08:10:44,566 INFO L226 Difference]: Without dead ends: 20148 [2020-12-22 08:10:44,583 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:10:44,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20148 states. [2020-12-22 08:10:45,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20148 to 20146. [2020-12-22 08:10:45,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20146 states. [2020-12-22 08:10:45,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20146 states to 20146 states and 33054 transitions. [2020-12-22 08:10:45,846 INFO L78 Accepts]: Start accepts. Automaton has 20146 states and 33054 transitions. Word has length 125 [2020-12-22 08:10:45,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:10:45,847 INFO L481 AbstractCegarLoop]: Abstraction has 20146 states and 33054 transitions. [2020-12-22 08:10:45,847 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:10:45,847 INFO L276 IsEmpty]: Start isEmpty. Operand 20146 states and 33054 transitions. [2020-12-22 08:10:45,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-12-22 08:10:45,851 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:10:45,851 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:10:45,851 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 08:10:45,852 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:10:45,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:10:45,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1843964843, now seen corresponding path program 1 times [2020-12-22 08:10:45,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:10:45,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039635796] [2020-12-22 08:10:45,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:10:45,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:10:45,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:10:45,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039635796] [2020-12-22 08:10:45,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:10:45,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:10:45,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033039692] [2020-12-22 08:10:45,983 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:10:45,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:10:45,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:10:45,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:10:45,984 INFO L87 Difference]: Start difference. First operand 20146 states and 33054 transitions. Second operand 4 states. [2020-12-22 08:10:48,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:10:48,044 INFO L93 Difference]: Finished difference Result 63048 states and 103778 transitions. [2020-12-22 08:10:48,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:10:48,045 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 125 [2020-12-22 08:10:48,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:10:48,184 INFO L225 Difference]: With dead ends: 63048 [2020-12-22 08:10:48,185 INFO L226 Difference]: Without dead ends: 43510 [2020-12-22 08:10:48,231 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:10:48,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43510 states. [2020-12-22 08:10:50,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43510 to 31766. [2020-12-22 08:10:50,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31766 states. [2020-12-22 08:10:50,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31766 states to 31766 states and 52060 transitions. [2020-12-22 08:10:50,167 INFO L78 Accepts]: Start accepts. Automaton has 31766 states and 52060 transitions. Word has length 125 [2020-12-22 08:10:50,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:10:50,168 INFO L481 AbstractCegarLoop]: Abstraction has 31766 states and 52060 transitions. [2020-12-22 08:10:50,168 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:10:50,168 INFO L276 IsEmpty]: Start isEmpty. Operand 31766 states and 52060 transitions. [2020-12-22 08:10:50,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-12-22 08:10:50,171 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:10:50,172 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:10:50,172 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 08:10:50,172 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:10:50,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:10:50,173 INFO L82 PathProgramCache]: Analyzing trace with hash -815921210, now seen corresponding path program 1 times [2020-12-22 08:10:50,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:10:50,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724211944] [2020-12-22 08:10:50,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:10:50,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:10:50,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:10:50,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724211944] [2020-12-22 08:10:50,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:10:50,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:10:50,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054913032] [2020-12-22 08:10:50,256 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:10:50,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:10:50,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:10:50,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:10:50,257 INFO L87 Difference]: Start difference. First operand 31766 states and 52060 transitions. Second operand 3 states. [2020-12-22 08:10:52,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:10:52,402 INFO L93 Difference]: Finished difference Result 70396 states and 115732 transitions. [2020-12-22 08:10:52,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:10:52,403 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 125 [2020-12-22 08:10:52,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:10:52,533 INFO L225 Difference]: With dead ends: 70396 [2020-12-22 08:10:52,533 INFO L226 Difference]: Without dead ends: 47781 [2020-12-22 08:10:52,584 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:10:52,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47781 states. [2020-12-22 08:10:54,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47781 to 47779. [2020-12-22 08:10:54,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47779 states. [2020-12-22 08:10:55,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47779 states to 47779 states and 78186 transitions. [2020-12-22 08:10:55,119 INFO L78 Accepts]: Start accepts. Automaton has 47779 states and 78186 transitions. Word has length 125 [2020-12-22 08:10:55,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:10:55,120 INFO L481 AbstractCegarLoop]: Abstraction has 47779 states and 78186 transitions. [2020-12-22 08:10:55,120 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:10:55,120 INFO L276 IsEmpty]: Start isEmpty. Operand 47779 states and 78186 transitions. [2020-12-22 08:10:55,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-12-22 08:10:55,122 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:10:55,122 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:10:55,123 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 08:10:55,123 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:10:55,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:10:55,123 INFO L82 PathProgramCache]: Analyzing trace with hash 2056786782, now seen corresponding path program 1 times [2020-12-22 08:10:55,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:10:55,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237540490] [2020-12-22 08:10:55,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:10:55,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:10:55,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:10:55,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237540490] [2020-12-22 08:10:55,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:10:55,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:10:55,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182357151] [2020-12-22 08:10:55,202 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:10:55,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:10:55,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:10:55,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:10:55,203 INFO L87 Difference]: Start difference. First operand 47779 states and 78186 transitions. Second operand 3 states. [2020-12-22 08:10:58,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:10:58,484 INFO L93 Difference]: Finished difference Result 106298 states and 175363 transitions. [2020-12-22 08:10:58,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:10:58,485 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 125 [2020-12-22 08:10:58,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:10:58,651 INFO L225 Difference]: With dead ends: 106298 [2020-12-22 08:10:58,651 INFO L226 Difference]: Without dead ends: 71747 [2020-12-22 08:10:58,696 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:10:58,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71747 states. [2020-12-22 08:11:02,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71747 to 71745. [2020-12-22 08:11:02,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71745 states. [2020-12-22 08:11:02,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71745 states to 71745 states and 117564 transitions. [2020-12-22 08:11:02,633 INFO L78 Accepts]: Start accepts. Automaton has 71745 states and 117564 transitions. Word has length 125 [2020-12-22 08:11:02,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:11:02,633 INFO L481 AbstractCegarLoop]: Abstraction has 71745 states and 117564 transitions. [2020-12-22 08:11:02,633 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:11:02,633 INFO L276 IsEmpty]: Start isEmpty. Operand 71745 states and 117564 transitions. [2020-12-22 08:11:02,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-12-22 08:11:02,635 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:11:02,635 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:11:02,636 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 08:11:02,636 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:11:02,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:11:02,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1381723230, now seen corresponding path program 1 times [2020-12-22 08:11:02,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:11:02,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655283845] [2020-12-22 08:11:02,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:11:02,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:11:02,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:11:02,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655283845] [2020-12-22 08:11:02,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:11:02,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:11:02,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637246351] [2020-12-22 08:11:02,744 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:11:02,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:11:02,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:11:02,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:11:02,745 INFO L87 Difference]: Start difference. First operand 71745 states and 117564 transitions. Second operand 4 states. [2020-12-22 08:11:10,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:11:10,314 INFO L93 Difference]: Finished difference Result 221822 states and 364275 transitions. [2020-12-22 08:11:10,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:11:10,315 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 126 [2020-12-22 08:11:10,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:11:10,626 INFO L225 Difference]: With dead ends: 221822 [2020-12-22 08:11:10,626 INFO L226 Difference]: Without dead ends: 150321 [2020-12-22 08:11:10,869 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:11:10,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150321 states. [2020-12-22 08:11:16,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150321 to 110776. [2020-12-22 08:11:16,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110776 states. [2020-12-22 08:11:17,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110776 states to 110776 states and 181057 transitions. [2020-12-22 08:11:17,237 INFO L78 Accepts]: Start accepts. Automaton has 110776 states and 181057 transitions. Word has length 126 [2020-12-22 08:11:17,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:11:17,237 INFO L481 AbstractCegarLoop]: Abstraction has 110776 states and 181057 transitions. [2020-12-22 08:11:17,237 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:11:17,237 INFO L276 IsEmpty]: Start isEmpty. Operand 110776 states and 181057 transitions. [2020-12-22 08:11:17,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-12-22 08:11:17,238 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:11:17,239 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] [2020-12-22 08:11:17,239 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 08:11:17,239 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:11:17,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:11:17,240 INFO L82 PathProgramCache]: Analyzing trace with hash 2086532755, now seen corresponding path program 1 times [2020-12-22 08:11:17,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:11:17,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900500659] [2020-12-22 08:11:17,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:11:17,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:11:17,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:11:17,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900500659] [2020-12-22 08:11:17,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:11:17,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:11:17,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944187620] [2020-12-22 08:11:17,460 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:11:17,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:11:17,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:11:17,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:11:17,461 INFO L87 Difference]: Start difference. First operand 110776 states and 181057 transitions. Second operand 6 states. [2020-12-22 08:11:27,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:11:27,646 INFO L93 Difference]: Finished difference Result 279054 states and 456463 transitions. [2020-12-22 08:11:27,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:11:27,647 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 128 [2020-12-22 08:11:27,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:11:28,019 INFO L225 Difference]: With dead ends: 279054 [2020-12-22 08:11:28,020 INFO L226 Difference]: Without dead ends: 168522 [2020-12-22 08:11:28,120 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:11:28,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168522 states. [2020-12-22 08:11:36,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168522 to 141796. [2020-12-22 08:11:36,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141796 states. [2020-12-22 08:11:37,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141796 states to 141796 states and 230812 transitions. [2020-12-22 08:11:37,297 INFO L78 Accepts]: Start accepts. Automaton has 141796 states and 230812 transitions. Word has length 128 [2020-12-22 08:11:37,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:11:37,297 INFO L481 AbstractCegarLoop]: Abstraction has 141796 states and 230812 transitions. [2020-12-22 08:11:37,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:11:37,298 INFO L276 IsEmpty]: Start isEmpty. Operand 141796 states and 230812 transitions. [2020-12-22 08:11:37,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-12-22 08:11:37,299 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:11:37,299 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:11:37,301 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 08:11:37,302 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:11:37,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:11:37,303 INFO L82 PathProgramCache]: Analyzing trace with hash 1082243879, now seen corresponding path program 1 times [2020-12-22 08:11:37,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:11:37,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698483528] [2020-12-22 08:11:37,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:11:37,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:11:37,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:11:37,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698483528] [2020-12-22 08:11:37,843 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:11:37,843 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:11:37,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837147069] [2020-12-22 08:11:37,843 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:11:37,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:11:37,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:11:37,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:11:37,844 INFO L87 Difference]: Start difference. First operand 141796 states and 230812 transitions. Second operand 6 states. [2020-12-22 08:11:59,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:11:59,371 INFO L93 Difference]: Finished difference Result 463500 states and 755841 transitions. [2020-12-22 08:11:59,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:11:59,372 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 131 [2020-12-22 08:11:59,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:12:00,085 INFO L225 Difference]: With dead ends: 463500 [2020-12-22 08:12:00,086 INFO L226 Difference]: Without dead ends: 321948 [2020-12-22 08:12:00,494 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:12:00,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321948 states. [2020-12-22 08:12:16,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321948 to 195472. [2020-12-22 08:12:16,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195472 states. [2020-12-22 08:12:16,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195472 states to 195472 states and 317363 transitions. [2020-12-22 08:12:16,804 INFO L78 Accepts]: Start accepts. Automaton has 195472 states and 317363 transitions. Word has length 131 [2020-12-22 08:12:16,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:12:16,804 INFO L481 AbstractCegarLoop]: Abstraction has 195472 states and 317363 transitions. [2020-12-22 08:12:16,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:12:16,805 INFO L276 IsEmpty]: Start isEmpty. Operand 195472 states and 317363 transitions. [2020-12-22 08:12:16,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-12-22 08:12:16,818 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:12:16,818 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:12:16,818 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 08:12:16,819 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:12:16,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:12:16,821 INFO L82 PathProgramCache]: Analyzing trace with hash -812087216, now seen corresponding path program 1 times [2020-12-22 08:12:16,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:12:16,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041842989] [2020-12-22 08:12:16,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:12:16,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:12:17,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:12:17,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041842989] [2020-12-22 08:12:17,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:12:17,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:12:17,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070334513] [2020-12-22 08:12:17,042 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:12:17,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:12:17,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:12:17,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:12:17,043 INFO L87 Difference]: Start difference. First operand 195472 states and 317363 transitions. Second operand 5 states. [2020-12-22 08:12:47,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:12:47,020 INFO L93 Difference]: Finished difference Result 384896 states and 622435 transitions. [2020-12-22 08:12:47,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:12:47,020 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 132 [2020-12-22 08:12:47,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:12:48,098 INFO L225 Difference]: With dead ends: 384896 [2020-12-22 08:12:48,098 INFO L226 Difference]: Without dead ends: 384894 [2020-12-22 08:12:48,216 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:12:48,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384894 states. [2020-12-22 08:13:06,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384894 to 200188. [2020-12-22 08:13:06,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200188 states. [2020-12-22 08:13:07,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200188 states to 200188 states and 322052 transitions. [2020-12-22 08:13:07,655 INFO L78 Accepts]: Start accepts. Automaton has 200188 states and 322052 transitions. Word has length 132 [2020-12-22 08:13:07,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:13:07,656 INFO L481 AbstractCegarLoop]: Abstraction has 200188 states and 322052 transitions. [2020-12-22 08:13:07,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:13:07,656 INFO L276 IsEmpty]: Start isEmpty. Operand 200188 states and 322052 transitions. [2020-12-22 08:13:07,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-12-22 08:13:07,684 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:13:07,686 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:13:07,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 08:13:07,687 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:13:07,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:13:07,687 INFO L82 PathProgramCache]: Analyzing trace with hash 1146801810, now seen corresponding path program 1 times [2020-12-22 08:13:07,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:13:07,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681826551] [2020-12-22 08:13:07,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:13:07,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:13:07,855 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-22 08:13:07,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681826551] [2020-12-22 08:13:07,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:13:07,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:13:07,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250801674] [2020-12-22 08:13:07,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:13:07,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:13:07,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:13:07,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:13:07,858 INFO L87 Difference]: Start difference. First operand 200188 states and 322052 transitions. Second operand 6 states.