/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.2.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 09:01:33,237 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 09:01:33,240 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 09:01:33,295 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 09:01:33,296 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 09:01:33,300 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 09:01:33,304 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 09:01:33,311 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 09:01:33,314 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 09:01:33,320 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 09:01:33,322 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 09:01:33,323 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 09:01:33,324 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 09:01:33,328 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 09:01:33,330 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 09:01:33,332 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 09:01:33,333 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 09:01:33,334 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 09:01:33,348 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 09:01:33,351 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 09:01:33,353 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 09:01:33,354 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 09:01:33,355 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 09:01:33,356 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 09:01:33,359 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-22 09:01:33,359 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-22 09:01:33,360 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-22 09:01:33,361 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-22 09:01:33,361 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-22 09:01:33,362 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-22 09:01:33,363 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 09:01:33,364 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 09:01:33,365 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 09:01:33,365 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 09:01:33,367 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 09:01:33,367 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 09:01:33,368 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 09:01:33,368 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 09:01:33,368 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 09:01:33,369 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 09:01:33,370 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 09:01:33,371 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 09:01:33,404 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 09:01:33,404 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 09:01:33,408 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 09:01:33,408 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 09:01:33,408 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 09:01:33,409 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 09:01:33,409 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 09:01:33,409 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 09:01:33,409 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 09:01:33,410 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 09:01:33,410 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 09:01:33,411 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 09:01:33,412 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 09:01:33,412 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 09:01:33,412 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 09:01:33,412 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 09:01:33,412 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 09:01:33,413 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:01:33,413 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 09:01:33,413 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 09:01:33,413 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 09:01:33,414 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 09:01:33,414 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 09:01:33,414 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 09:01:33,415 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 09:01:33,415 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 09:01:33,882 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 09:01:33,925 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 09:01:33,928 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 09:01:33,930 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 09:01:33,931 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 09:01:33,932 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.2.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-12-22 09:01:34,029 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec5ad45f6/a2dcde0b338a4fd3afdbfea13f96cc20/FLAG191a29264 [2020-12-22 09:01:34,794 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 09:01:34,797 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.2.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-12-22 09:01:34,819 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec5ad45f6/a2dcde0b338a4fd3afdbfea13f96cc20/FLAG191a29264 [2020-12-22 09:01:35,095 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec5ad45f6/a2dcde0b338a4fd3afdbfea13f96cc20 [2020-12-22 09:01:35,098 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 09:01:35,100 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 09:01:35,102 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 09:01:35,102 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 09:01:35,107 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 09:01:35,108 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:01:35" (1/1) ... [2020-12-22 09:01:35,110 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7526a573 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:01:35, skipping insertion in model container [2020-12-22 09:01:35,110 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:01:35" (1/1) ... [2020-12-22 09:01:35,118 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 09:01:35,163 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 09:01:35,409 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.2.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[7402,7415] [2020-12-22 09:01:35,462 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:01:35,490 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 09:01:35,543 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.2.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[7402,7415] [2020-12-22 09:01:35,574 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:01:35,612 INFO L208 MainTranslator]: Completed translation [2020-12-22 09:01:35,613 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:01:35 WrapperNode [2020-12-22 09:01:35,613 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 09:01:35,614 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 09:01:35,614 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 09:01:35,614 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 09:01:35,621 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:01:35" (1/1) ... [2020-12-22 09:01:35,634 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:01:35" (1/1) ... [2020-12-22 09:01:35,683 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 09:01:35,684 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 09:01:35,684 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 09:01:35,684 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 09:01:35,694 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:01:35" (1/1) ... [2020-12-22 09:01:35,695 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:01:35" (1/1) ... [2020-12-22 09:01:35,710 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:01:35" (1/1) ... [2020-12-22 09:01:35,711 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:01:35" (1/1) ... [2020-12-22 09:01:35,734 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:01:35" (1/1) ... [2020-12-22 09:01:35,748 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:01:35" (1/1) ... [2020-12-22 09:01:35,754 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:01:35" (1/1) ... [2020-12-22 09:01:35,767 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 09:01:35,768 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 09:01:35,768 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 09:01:35,769 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 09:01:35,769 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:01:35" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:01:35,899 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 09:01:35,900 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 09:01:35,900 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 09:01:35,900 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 09:01:36,918 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 09:01:36,919 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 09:01:36,921 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:01:36 BoogieIcfgContainer [2020-12-22 09:01:36,921 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 09:01:36,923 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 09:01:36,923 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 09:01:36,927 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 09:01:36,927 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:01:35" (1/3) ... [2020-12-22 09:01:36,928 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65f9bc7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:01:36, skipping insertion in model container [2020-12-22 09:01:36,928 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:01:35" (2/3) ... [2020-12-22 09:01:36,929 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65f9bc7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:01:36, skipping insertion in model container [2020-12-22 09:01:36,929 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:01:36" (3/3) ... [2020-12-22 09:01:36,930 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.2.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-12-22 09:01:36,937 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 09:01:36,943 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 09:01:36,963 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 09:01:36,992 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 09:01:36,992 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 09:01:36,992 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 09:01:36,993 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 09:01:36,993 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 09:01:36,993 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 09:01:36,993 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 09:01:36,993 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 09:01:37,012 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states. [2020-12-22 09:01:37,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-22 09:01:37,023 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:01:37,024 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] [2020-12-22 09:01:37,025 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:01:37,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:01:37,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1468963440, now seen corresponding path program 1 times [2020-12-22 09:01:37,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:01:37,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367406022] [2020-12-22 09:01:37,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:01:37,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:01:37,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:01:37,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367406022] [2020-12-22 09:01:37,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:01:37,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:01:37,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6467219] [2020-12-22 09:01:37,554 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:01:37,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:01:37,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:01:37,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:01:37,573 INFO L87 Difference]: Start difference. First operand 149 states. Second operand 3 states. [2020-12-22 09:01:37,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:01:37,694 INFO L93 Difference]: Finished difference Result 323 states and 547 transitions. [2020-12-22 09:01:37,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:01:37,699 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 62 [2020-12-22 09:01:37,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:01:37,725 INFO L225 Difference]: With dead ends: 323 [2020-12-22 09:01:37,726 INFO L226 Difference]: Without dead ends: 225 [2020-12-22 09:01:37,730 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:01:37,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-12-22 09:01:37,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 223. [2020-12-22 09:01:37,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2020-12-22 09:01:37,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 349 transitions. [2020-12-22 09:01:37,823 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 349 transitions. Word has length 62 [2020-12-22 09:01:37,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:01:37,823 INFO L481 AbstractCegarLoop]: Abstraction has 223 states and 349 transitions. [2020-12-22 09:01:37,823 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:01:37,824 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 349 transitions. [2020-12-22 09:01:37,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:01:37,834 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:01:37,834 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] [2020-12-22 09:01:37,835 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 09:01:37,835 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:01:37,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:01:37,836 INFO L82 PathProgramCache]: Analyzing trace with hash -240910223, now seen corresponding path program 1 times [2020-12-22 09:01:37,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:01:37,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985821372] [2020-12-22 09:01:37,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:01:37,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:01:38,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:01:38,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985821372] [2020-12-22 09:01:38,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:01:38,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:01:38,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712066133] [2020-12-22 09:01:38,010 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:01:38,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:01:38,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:01:38,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:01:38,012 INFO L87 Difference]: Start difference. First operand 223 states and 349 transitions. Second operand 3 states. [2020-12-22 09:01:38,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:01:38,058 INFO L93 Difference]: Finished difference Result 539 states and 869 transitions. [2020-12-22 09:01:38,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:01:38,059 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 09:01:38,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:01:38,062 INFO L225 Difference]: With dead ends: 539 [2020-12-22 09:01:38,063 INFO L226 Difference]: Without dead ends: 373 [2020-12-22 09:01:38,065 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:01:38,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2020-12-22 09:01:38,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 371. [2020-12-22 09:01:38,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 371 states. [2020-12-22 09:01:38,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 592 transitions. [2020-12-22 09:01:38,103 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 592 transitions. Word has length 64 [2020-12-22 09:01:38,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:01:38,104 INFO L481 AbstractCegarLoop]: Abstraction has 371 states and 592 transitions. [2020-12-22 09:01:38,104 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:01:38,104 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 592 transitions. [2020-12-22 09:01:38,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:01:38,107 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:01:38,108 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] [2020-12-22 09:01:38,108 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 09:01:38,108 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:01:38,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:01:38,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1851209774, now seen corresponding path program 1 times [2020-12-22 09:01:38,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:01:38,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420289919] [2020-12-22 09:01:38,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:01:38,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:01:38,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:01:38,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420289919] [2020-12-22 09:01:38,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:01:38,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:01:38,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034750791] [2020-12-22 09:01:38,352 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:01:38,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:01:38,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:01:38,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:01:38,364 INFO L87 Difference]: Start difference. First operand 371 states and 592 transitions. Second operand 3 states. [2020-12-22 09:01:38,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:01:38,448 INFO L93 Difference]: Finished difference Result 967 states and 1570 transitions. [2020-12-22 09:01:38,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:01:38,448 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 09:01:38,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:01:38,457 INFO L225 Difference]: With dead ends: 967 [2020-12-22 09:01:38,458 INFO L226 Difference]: Without dead ends: 653 [2020-12-22 09:01:38,462 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:01:38,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2020-12-22 09:01:38,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 651. [2020-12-22 09:01:38,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 651 states. [2020-12-22 09:01:38,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 1048 transitions. [2020-12-22 09:01:38,549 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 1048 transitions. Word has length 66 [2020-12-22 09:01:38,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:01:38,550 INFO L481 AbstractCegarLoop]: Abstraction has 651 states and 1048 transitions. [2020-12-22 09:01:38,550 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:01:38,550 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 1048 transitions. [2020-12-22 09:01:38,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 09:01:38,560 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:01:38,560 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:01:38,560 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 09:01:38,561 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:01:38,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:01:38,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1666116403, now seen corresponding path program 1 times [2020-12-22 09:01:38,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:01:38,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703991400] [2020-12-22 09:01:38,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:01:38,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:01:38,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:01:38,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703991400] [2020-12-22 09:01:38,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:01:38,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:01:38,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16703448] [2020-12-22 09:01:38,839 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:01:38,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:01:38,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:01:38,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:01:38,841 INFO L87 Difference]: Start difference. First operand 651 states and 1048 transitions. Second operand 5 states. [2020-12-22 09:01:39,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:01:39,160 INFO L93 Difference]: Finished difference Result 2807 states and 4618 transitions. [2020-12-22 09:01:39,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:01:39,161 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 68 [2020-12-22 09:01:39,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:01:39,176 INFO L225 Difference]: With dead ends: 2807 [2020-12-22 09:01:39,176 INFO L226 Difference]: Without dead ends: 2213 [2020-12-22 09:01:39,179 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:01:39,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2213 states. [2020-12-22 09:01:39,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2213 to 1170. [2020-12-22 09:01:39,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1170 states. [2020-12-22 09:01:39,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1170 states to 1170 states and 1898 transitions. [2020-12-22 09:01:39,273 INFO L78 Accepts]: Start accepts. Automaton has 1170 states and 1898 transitions. Word has length 68 [2020-12-22 09:01:39,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:01:39,274 INFO L481 AbstractCegarLoop]: Abstraction has 1170 states and 1898 transitions. [2020-12-22 09:01:39,274 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:01:39,274 INFO L276 IsEmpty]: Start isEmpty. Operand 1170 states and 1898 transitions. [2020-12-22 09:01:39,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-22 09:01:39,276 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:01:39,276 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] [2020-12-22 09:01:39,276 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 09:01:39,277 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:01:39,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:01:39,277 INFO L82 PathProgramCache]: Analyzing trace with hash 47496755, now seen corresponding path program 1 times [2020-12-22 09:01:39,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:01:39,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180968338] [2020-12-22 09:01:39,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:01:39,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:01:39,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:01:39,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180968338] [2020-12-22 09:01:39,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:01:39,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:01:39,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070516596] [2020-12-22 09:01:39,403 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:01:39,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:01:39,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:01:39,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:01:39,404 INFO L87 Difference]: Start difference. First operand 1170 states and 1898 transitions. Second operand 4 states. [2020-12-22 09:01:39,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:01:39,582 INFO L93 Difference]: Finished difference Result 3409 states and 5599 transitions. [2020-12-22 09:01:39,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:01:39,583 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 69 [2020-12-22 09:01:39,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:01:39,596 INFO L225 Difference]: With dead ends: 3409 [2020-12-22 09:01:39,596 INFO L226 Difference]: Without dead ends: 2296 [2020-12-22 09:01:39,599 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:01:39,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2296 states. [2020-12-22 09:01:39,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2296 to 1724. [2020-12-22 09:01:39,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1724 states. [2020-12-22 09:01:39,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1724 states to 1724 states and 2808 transitions. [2020-12-22 09:01:39,711 INFO L78 Accepts]: Start accepts. Automaton has 1724 states and 2808 transitions. Word has length 69 [2020-12-22 09:01:39,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:01:39,712 INFO L481 AbstractCegarLoop]: Abstraction has 1724 states and 2808 transitions. [2020-12-22 09:01:39,712 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:01:39,712 INFO L276 IsEmpty]: Start isEmpty. Operand 1724 states and 2808 transitions. [2020-12-22 09:01:39,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 09:01:39,714 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:01:39,714 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] [2020-12-22 09:01:39,715 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 09:01:39,715 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:01:39,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:01:39,716 INFO L82 PathProgramCache]: Analyzing trace with hash -1156873170, now seen corresponding path program 1 times [2020-12-22 09:01:39,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:01:39,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390287288] [2020-12-22 09:01:39,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:01:39,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:01:39,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:01:39,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390287288] [2020-12-22 09:01:39,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:01:39,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:01:39,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74345802] [2020-12-22 09:01:39,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:01:39,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:01:39,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:01:39,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:01:39,792 INFO L87 Difference]: Start difference. First operand 1724 states and 2808 transitions. Second operand 3 states. [2020-12-22 09:01:39,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:01:39,975 INFO L93 Difference]: Finished difference Result 3779 states and 6218 transitions. [2020-12-22 09:01:39,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:01:39,975 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 70 [2020-12-22 09:01:39,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:01:39,990 INFO L225 Difference]: With dead ends: 3779 [2020-12-22 09:01:39,990 INFO L226 Difference]: Without dead ends: 2591 [2020-12-22 09:01:39,993 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:01:39,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2591 states. [2020-12-22 09:01:40,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2591 to 2589. [2020-12-22 09:01:40,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2589 states. [2020-12-22 09:01:40,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2589 states to 2589 states and 4227 transitions. [2020-12-22 09:01:40,155 INFO L78 Accepts]: Start accepts. Automaton has 2589 states and 4227 transitions. Word has length 70 [2020-12-22 09:01:40,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:01:40,156 INFO L481 AbstractCegarLoop]: Abstraction has 2589 states and 4227 transitions. [2020-12-22 09:01:40,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:01:40,156 INFO L276 IsEmpty]: Start isEmpty. Operand 2589 states and 4227 transitions. [2020-12-22 09:01:40,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 09:01:40,157 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:01:40,158 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] [2020-12-22 09:01:40,158 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 09:01:40,158 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:01:40,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:01:40,160 INFO L82 PathProgramCache]: Analyzing trace with hash -1843763252, now seen corresponding path program 1 times [2020-12-22 09:01:40,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:01:40,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800643350] [2020-12-22 09:01:40,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:01:40,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:01:40,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:01:40,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800643350] [2020-12-22 09:01:40,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:01:40,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:01:40,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341116157] [2020-12-22 09:01:40,264 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:01:40,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:01:40,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:01:40,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:01:40,266 INFO L87 Difference]: Start difference. First operand 2589 states and 4227 transitions. Second operand 3 states. [2020-12-22 09:01:40,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:01:40,483 INFO L93 Difference]: Finished difference Result 5033 states and 8246 transitions. [2020-12-22 09:01:40,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:01:40,483 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 70 [2020-12-22 09:01:40,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:01:40,505 INFO L225 Difference]: With dead ends: 5033 [2020-12-22 09:01:40,505 INFO L226 Difference]: Without dead ends: 3599 [2020-12-22 09:01:40,510 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:01:40,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3599 states. [2020-12-22 09:01:40,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3599 to 3597. [2020-12-22 09:01:40,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3597 states. [2020-12-22 09:01:40,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3597 states to 3597 states and 5857 transitions. [2020-12-22 09:01:40,785 INFO L78 Accepts]: Start accepts. Automaton has 3597 states and 5857 transitions. Word has length 70 [2020-12-22 09:01:40,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:01:40,785 INFO L481 AbstractCegarLoop]: Abstraction has 3597 states and 5857 transitions. [2020-12-22 09:01:40,785 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:01:40,786 INFO L276 IsEmpty]: Start isEmpty. Operand 3597 states and 5857 transitions. [2020-12-22 09:01:40,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 09:01:40,787 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:01:40,787 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] [2020-12-22 09:01:40,788 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 09:01:40,788 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:01:40,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:01:40,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1414453242, now seen corresponding path program 1 times [2020-12-22 09:01:40,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:01:40,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227513117] [2020-12-22 09:01:40,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:01:40,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:01:40,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:01:40,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227513117] [2020-12-22 09:01:40,938 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:01:40,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:01:40,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213051683] [2020-12-22 09:01:40,939 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:01:40,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:01:40,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:01:40,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:01:40,941 INFO L87 Difference]: Start difference. First operand 3597 states and 5857 transitions. Second operand 4 states. [2020-12-22 09:01:41,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:01:41,508 INFO L93 Difference]: Finished difference Result 11637 states and 19017 transitions. [2020-12-22 09:01:41,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:01:41,509 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 70 [2020-12-22 09:01:41,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:01:41,554 INFO L225 Difference]: With dead ends: 11637 [2020-12-22 09:01:41,554 INFO L226 Difference]: Without dead ends: 8115 [2020-12-22 09:01:41,564 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 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 09:01:41,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8115 states. [2020-12-22 09:01:42,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8115 to 5670. [2020-12-22 09:01:42,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5670 states. [2020-12-22 09:01:42,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5670 states to 5670 states and 9202 transitions. [2020-12-22 09:01:42,116 INFO L78 Accepts]: Start accepts. Automaton has 5670 states and 9202 transitions. Word has length 70 [2020-12-22 09:01:42,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:01:42,116 INFO L481 AbstractCegarLoop]: Abstraction has 5670 states and 9202 transitions. [2020-12-22 09:01:42,116 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:01:42,116 INFO L276 IsEmpty]: Start isEmpty. Operand 5670 states and 9202 transitions. [2020-12-22 09:01:42,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 09:01:42,118 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:01:42,118 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] [2020-12-22 09:01:42,118 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 09:01:42,118 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:01:42,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:01:42,119 INFO L82 PathProgramCache]: Analyzing trace with hash 1510229994, now seen corresponding path program 1 times [2020-12-22 09:01:42,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:01:42,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262130652] [2020-12-22 09:01:42,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:01:42,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:01:42,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:01:42,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262130652] [2020-12-22 09:01:42,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:01:42,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:01:42,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874777092] [2020-12-22 09:01:42,189 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:01:42,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:01:42,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:01:42,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:01:42,191 INFO L87 Difference]: Start difference. First operand 5670 states and 9202 transitions. Second operand 3 states. [2020-12-22 09:01:42,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:01:42,814 INFO L93 Difference]: Finished difference Result 11090 states and 18039 transitions. [2020-12-22 09:01:42,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:01:42,815 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 70 [2020-12-22 09:01:42,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:01:42,870 INFO L225 Difference]: With dead ends: 11090 [2020-12-22 09:01:42,870 INFO L226 Difference]: Without dead ends: 7838 [2020-12-22 09:01:42,878 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:01:42,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7838 states. [2020-12-22 09:01:43,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7838 to 7836. [2020-12-22 09:01:43,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7836 states. [2020-12-22 09:01:43,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7836 states to 7836 states and 12656 transitions. [2020-12-22 09:01:43,495 INFO L78 Accepts]: Start accepts. Automaton has 7836 states and 12656 transitions. Word has length 70 [2020-12-22 09:01:43,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:01:43,496 INFO L481 AbstractCegarLoop]: Abstraction has 7836 states and 12656 transitions. [2020-12-22 09:01:43,496 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:01:43,496 INFO L276 IsEmpty]: Start isEmpty. Operand 7836 states and 12656 transitions. [2020-12-22 09:01:43,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-22 09:01:43,497 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:01:43,497 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] [2020-12-22 09:01:43,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 09:01:43,497 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:01:43,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:01:43,498 INFO L82 PathProgramCache]: Analyzing trace with hash 844989402, now seen corresponding path program 1 times [2020-12-22 09:01:43,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:01:43,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942909777] [2020-12-22 09:01:43,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:01:43,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:01:43,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:01:43,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942909777] [2020-12-22 09:01:43,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:01:43,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:01:43,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166420236] [2020-12-22 09:01:43,583 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:01:43,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:01:43,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:01:43,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:01:43,585 INFO L87 Difference]: Start difference. First operand 7836 states and 12656 transitions. Second operand 4 states. [2020-12-22 09:01:44,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:01:44,727 INFO L93 Difference]: Finished difference Result 25425 states and 41161 transitions. [2020-12-22 09:01:44,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:01:44,728 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 71 [2020-12-22 09:01:44,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:01:44,780 INFO L225 Difference]: With dead ends: 25425 [2020-12-22 09:01:44,780 INFO L226 Difference]: Without dead ends: 17680 [2020-12-22 09:01:44,796 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 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 09:01:44,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17680 states. [2020-12-22 09:01:45,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17680 to 12235. [2020-12-22 09:01:45,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12235 states. [2020-12-22 09:01:45,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12235 states to 12235 states and 19663 transitions. [2020-12-22 09:01:45,849 INFO L78 Accepts]: Start accepts. Automaton has 12235 states and 19663 transitions. Word has length 71 [2020-12-22 09:01:45,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:01:45,849 INFO L481 AbstractCegarLoop]: Abstraction has 12235 states and 19663 transitions. [2020-12-22 09:01:45,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:01:45,850 INFO L276 IsEmpty]: Start isEmpty. Operand 12235 states and 19663 transitions. [2020-12-22 09:01:45,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-22 09:01:45,850 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:01:45,851 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] [2020-12-22 09:01:45,851 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 09:01:45,851 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:01:45,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:01:45,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1231314837, now seen corresponding path program 1 times [2020-12-22 09:01:45,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:01:45,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052519248] [2020-12-22 09:01:45,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:01:45,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:01:45,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:01:45,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052519248] [2020-12-22 09:01:45,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:01:45,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:01:45,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609544343] [2020-12-22 09:01:45,976 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:01:45,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:01:45,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:01:45,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:01:45,977 INFO L87 Difference]: Start difference. First operand 12235 states and 19663 transitions. Second operand 4 states. [2020-12-22 09:01:47,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:01:47,606 INFO L93 Difference]: Finished difference Result 35934 states and 57718 transitions. [2020-12-22 09:01:47,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:01:47,607 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 73 [2020-12-22 09:01:47,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:01:47,666 INFO L225 Difference]: With dead ends: 35934 [2020-12-22 09:01:47,666 INFO L226 Difference]: Without dead ends: 23708 [2020-12-22 09:01:47,692 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:01:47,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23708 states. [2020-12-22 09:01:49,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23708 to 23706. [2020-12-22 09:01:49,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23706 states. [2020-12-22 09:01:49,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23706 states to 23706 states and 37843 transitions. [2020-12-22 09:01:49,353 INFO L78 Accepts]: Start accepts. Automaton has 23706 states and 37843 transitions. Word has length 73 [2020-12-22 09:01:49,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:01:49,353 INFO L481 AbstractCegarLoop]: Abstraction has 23706 states and 37843 transitions. [2020-12-22 09:01:49,353 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:01:49,354 INFO L276 IsEmpty]: Start isEmpty. Operand 23706 states and 37843 transitions. [2020-12-22 09:01:49,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-22 09:01:49,355 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:01:49,355 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:01:49,355 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 09:01:49,356 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:01:49,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:01:49,356 INFO L82 PathProgramCache]: Analyzing trace with hash -940832745, now seen corresponding path program 1 times [2020-12-22 09:01:49,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:01:49,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773252100] [2020-12-22 09:01:49,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:01:49,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:01:49,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:01:49,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773252100] [2020-12-22 09:01:49,392 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:01:49,392 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:01:49,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527639608] [2020-12-22 09:01:49,392 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:01:49,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:01:49,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:01:49,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:01:49,394 INFO L87 Difference]: Start difference. First operand 23706 states and 37843 transitions. Second operand 3 states. [2020-12-22 09:01:51,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:01:51,418 INFO L93 Difference]: Finished difference Result 71080 states and 113467 transitions. [2020-12-22 09:01:51,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:01:51,419 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 74 [2020-12-22 09:01:51,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:01:51,535 INFO L225 Difference]: With dead ends: 71080 [2020-12-22 09:01:51,536 INFO L226 Difference]: Without dead ends: 47402 [2020-12-22 09:01:51,571 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:01:51,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47402 states. [2020-12-22 09:01:53,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47402 to 23708. [2020-12-22 09:01:53,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23708 states. [2020-12-22 09:01:53,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23708 states to 23708 states and 37845 transitions. [2020-12-22 09:01:53,442 INFO L78 Accepts]: Start accepts. Automaton has 23708 states and 37845 transitions. Word has length 74 [2020-12-22 09:01:53,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:01:53,442 INFO L481 AbstractCegarLoop]: Abstraction has 23708 states and 37845 transitions. [2020-12-22 09:01:53,442 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:01:53,442 INFO L276 IsEmpty]: Start isEmpty. Operand 23708 states and 37845 transitions. [2020-12-22 09:01:53,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-22 09:01:53,444 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:01:53,444 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] [2020-12-22 09:01:53,444 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 09:01:53,444 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:01:53,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:01:53,445 INFO L82 PathProgramCache]: Analyzing trace with hash 826320946, now seen corresponding path program 1 times [2020-12-22 09:01:53,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:01:53,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174057325] [2020-12-22 09:01:53,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:01:53,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:01:53,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:01:53,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174057325] [2020-12-22 09:01:53,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:01:53,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:01:53,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468050535] [2020-12-22 09:01:53,496 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:01:53,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:01:53,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:01:53,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:01:53,497 INFO L87 Difference]: Start difference. First operand 23708 states and 37845 transitions. Second operand 3 states. [2020-12-22 09:01:55,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:01:55,754 INFO L93 Difference]: Finished difference Result 57125 states and 91716 transitions. [2020-12-22 09:01:55,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:01:55,755 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 74 [2020-12-22 09:01:55,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:01:55,826 INFO L225 Difference]: With dead ends: 57125 [2020-12-22 09:01:55,827 INFO L226 Difference]: Without dead ends: 33546 [2020-12-22 09:01:55,861 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:01:55,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33546 states. [2020-12-22 09:01:58,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33546 to 32634. [2020-12-22 09:01:58,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32634 states. [2020-12-22 09:01:58,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32634 states to 32634 states and 52000 transitions. [2020-12-22 09:01:58,157 INFO L78 Accepts]: Start accepts. Automaton has 32634 states and 52000 transitions. Word has length 74 [2020-12-22 09:01:58,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:01:58,157 INFO L481 AbstractCegarLoop]: Abstraction has 32634 states and 52000 transitions. [2020-12-22 09:01:58,157 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:01:58,157 INFO L276 IsEmpty]: Start isEmpty. Operand 32634 states and 52000 transitions. [2020-12-22 09:01:58,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-22 09:01:58,158 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:01:58,159 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] [2020-12-22 09:01:58,159 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 09:01:58,159 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:01:58,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:01:58,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1329573307, now seen corresponding path program 1 times [2020-12-22 09:01:58,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:01:58,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360546855] [2020-12-22 09:01:58,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:01:58,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:01:58,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:01:58,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360546855] [2020-12-22 09:01:58,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:01:58,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:01:58,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19283567] [2020-12-22 09:01:58,229 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:01:58,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:01:58,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:01:58,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:01:58,230 INFO L87 Difference]: Start difference. First operand 32634 states and 52000 transitions. Second operand 3 states. [2020-12-22 09:02:01,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:02:01,661 INFO L93 Difference]: Finished difference Result 95603 states and 152270 transitions. [2020-12-22 09:02:01,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:02:01,661 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 75 [2020-12-22 09:02:01,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:02:01,787 INFO L225 Difference]: With dead ends: 95603 [2020-12-22 09:02:01,787 INFO L226 Difference]: Without dead ends: 63142 [2020-12-22 09:02:01,823 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:02:01,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63142 states. [2020-12-22 09:02:05,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63142 to 63140. [2020-12-22 09:02:05,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63140 states. [2020-12-22 09:02:05,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63140 states to 63140 states and 99869 transitions. [2020-12-22 09:02:05,889 INFO L78 Accepts]: Start accepts. Automaton has 63140 states and 99869 transitions. Word has length 75 [2020-12-22 09:02:05,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:02:05,889 INFO L481 AbstractCegarLoop]: Abstraction has 63140 states and 99869 transitions. [2020-12-22 09:02:05,889 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:02:05,889 INFO L276 IsEmpty]: Start isEmpty. Operand 63140 states and 99869 transitions. [2020-12-22 09:02:05,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-22 09:02:05,890 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:02:05,891 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] [2020-12-22 09:02:05,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 09:02:05,891 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:02:05,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:02:05,892 INFO L82 PathProgramCache]: Analyzing trace with hash -121452674, now seen corresponding path program 1 times [2020-12-22 09:02:05,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:02:05,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134751561] [2020-12-22 09:02:05,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:02:05,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:02:06,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:02:06,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134751561] [2020-12-22 09:02:06,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:02:06,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:02:06,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251046535] [2020-12-22 09:02:06,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:02:06,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:02:06,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:02:06,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:02:06,005 INFO L87 Difference]: Start difference. First operand 63140 states and 99869 transitions. Second operand 5 states. [2020-12-22 09:02:13,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:02:13,468 INFO L93 Difference]: Finished difference Result 177450 states and 280542 transitions. [2020-12-22 09:02:13,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:02:13,468 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 75 [2020-12-22 09:02:13,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:02:13,689 INFO L225 Difference]: With dead ends: 177450 [2020-12-22 09:02:13,690 INFO L226 Difference]: Without dead ends: 114324 [2020-12-22 09:02:13,761 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:02:13,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114324 states. [2020-12-22 09:02:20,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114324 to 114322. [2020-12-22 09:02:20,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114322 states. [2020-12-22 09:02:21,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114322 states to 114322 states and 179279 transitions. [2020-12-22 09:02:21,106 INFO L78 Accepts]: Start accepts. Automaton has 114322 states and 179279 transitions. Word has length 75 [2020-12-22 09:02:21,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:02:21,106 INFO L481 AbstractCegarLoop]: Abstraction has 114322 states and 179279 transitions. [2020-12-22 09:02:21,106 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:02:21,106 INFO L276 IsEmpty]: Start isEmpty. Operand 114322 states and 179279 transitions. [2020-12-22 09:02:21,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-22 09:02:21,108 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:02:21,108 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] [2020-12-22 09:02:21,109 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 09:02:21,109 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:02:21,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:02:21,109 INFO L82 PathProgramCache]: Analyzing trace with hash 816290506, now seen corresponding path program 1 times [2020-12-22 09:02:21,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:02:21,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108341021] [2020-12-22 09:02:21,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:02:21,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:02:21,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:02:21,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108341021] [2020-12-22 09:02:21,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:02:21,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:02:21,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946774112] [2020-12-22 09:02:21,232 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:02:21,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:02:21,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:02:21,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:02:21,233 INFO L87 Difference]: Start difference. First operand 114322 states and 179279 transitions. Second operand 4 states. [2020-12-22 09:02:35,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:02:35,403 INFO L93 Difference]: Finished difference Result 335211 states and 525140 transitions. [2020-12-22 09:02:35,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:02:35,404 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 75 [2020-12-22 09:02:35,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:02:36,012 INFO L225 Difference]: With dead ends: 335211 [2020-12-22 09:02:36,012 INFO L226 Difference]: Without dead ends: 220945 [2020-12-22 09:02:36,160 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:02:36,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220945 states. [2020-12-22 09:02:50,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220945 to 220943. [2020-12-22 09:02:50,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220943 states. [2020-12-22 09:02:51,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220943 states to 220943 states and 343825 transitions. [2020-12-22 09:02:51,340 INFO L78 Accepts]: Start accepts. Automaton has 220943 states and 343825 transitions. Word has length 75 [2020-12-22 09:02:51,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:02:51,341 INFO L481 AbstractCegarLoop]: Abstraction has 220943 states and 343825 transitions. [2020-12-22 09:02:51,341 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:02:51,341 INFO L276 IsEmpty]: Start isEmpty. Operand 220943 states and 343825 transitions. [2020-12-22 09:02:51,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 09:02:51,343 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:02:51,344 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] [2020-12-22 09:02:51,344 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 09:02:51,344 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:02:51,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:02:51,345 INFO L82 PathProgramCache]: Analyzing trace with hash -353140970, now seen corresponding path program 1 times [2020-12-22 09:02:51,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:02:51,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930068856] [2020-12-22 09:02:51,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:02:51,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:02:51,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:02:51,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930068856] [2020-12-22 09:02:51,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:02:51,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:02:51,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632497507] [2020-12-22 09:02:51,389 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:02:51,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:02:51,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:02:51,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:02:51,391 INFO L87 Difference]: Start difference. First operand 220943 states and 343825 transitions. Second operand 3 states. [2020-12-22 09:03:19,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:03:19,811 INFO L93 Difference]: Finished difference Result 662677 states and 1031242 transitions. [2020-12-22 09:03:19,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:03:19,811 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 76 [2020-12-22 09:03:19,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:03:20,996 INFO L225 Difference]: With dead ends: 662677 [2020-12-22 09:03:20,996 INFO L226 Difference]: Without dead ends: 441825 [2020-12-22 09:03:21,257 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:03:21,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441825 states. [2020-12-22 09:03:39,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441825 to 220953. [2020-12-22 09:03:39,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220953 states. [2020-12-22 09:03:40,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220953 states to 220953 states and 343835 transitions. [2020-12-22 09:03:40,064 INFO L78 Accepts]: Start accepts. Automaton has 220953 states and 343835 transitions. Word has length 76 [2020-12-22 09:03:40,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:03:40,064 INFO L481 AbstractCegarLoop]: Abstraction has 220953 states and 343835 transitions. [2020-12-22 09:03:40,064 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:03:40,064 INFO L276 IsEmpty]: Start isEmpty. Operand 220953 states and 343835 transitions. [2020-12-22 09:03:40,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 09:03:40,067 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:03:40,067 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] [2020-12-22 09:03:40,068 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 09:03:40,068 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:03:40,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:03:40,068 INFO L82 PathProgramCache]: Analyzing trace with hash 1791136339, now seen corresponding path program 1 times [2020-12-22 09:03:40,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:03:40,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713576057] [2020-12-22 09:03:40,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:03:40,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:03:40,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:03:40,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713576057] [2020-12-22 09:03:40,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:03:40,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:03:40,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133876642] [2020-12-22 09:03:40,162 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:03:40,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:03:40,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:03:40,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:03:40,163 INFO L87 Difference]: Start difference. First operand 220953 states and 343835 transitions. Second operand 3 states.