/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/combinations/pals_lcr.4.1.ufo.BOUNDED-8.pals+Problem12_label04.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 09:41:22,309 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 09:41:22,315 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 09:41:22,375 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 09:41:22,376 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 09:41:22,381 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 09:41:22,385 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 09:41:22,393 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 09:41:22,397 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 09:41:22,403 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 09:41:22,405 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 09:41:22,406 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 09:41:22,407 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 09:41:22,411 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 09:41:22,413 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 09:41:22,415 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 09:41:22,427 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 09:41:22,431 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 09:41:22,439 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 09:41:22,447 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 09:41:22,449 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 09:41:22,451 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 09:41:22,453 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 09:41:22,455 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 09:41:22,462 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-22 09:41:22,462 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-22 09:41:22,462 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-22 09:41:22,465 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-22 09:41:22,466 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-22 09:41:22,467 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-22 09:41:22,467 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 09:41:22,468 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 09:41:22,470 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 09:41:22,471 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 09:41:22,472 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 09:41:22,473 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 09:41:22,473 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 09:41:22,474 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 09:41:22,474 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 09:41:22,475 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 09:41:22,476 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 09:41:22,481 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 09:41:22,537 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 09:41:22,538 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 09:41:22,542 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 09:41:22,543 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 09:41:22,543 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 09:41:22,543 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 09:41:22,544 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 09:41:22,544 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 09:41:22,544 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 09:41:22,545 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 09:41:22,546 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 09:41:22,546 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 09:41:22,547 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 09:41:22,547 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 09:41:22,547 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 09:41:22,547 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 09:41:22,547 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 09:41:22,548 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:41:22,548 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 09:41:22,548 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 09:41:22,549 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 09:41:22,549 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 09:41:22,549 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 09:41:22,549 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 09:41:22,550 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 09:41:22,550 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 09:41:23,030 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 09:41:23,062 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 09:41:23,065 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 09:41:23,067 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 09:41:23,068 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 09:41:23,069 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.4.1.ufo.BOUNDED-8.pals+Problem12_label04.c [2020-12-22 09:41:23,165 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3dbdf1403/d98bd18b425c4421b5096870cfdbd6ee/FLAG47646ec53 [2020-12-22 09:41:24,340 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 09:41:24,341 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.4.1.ufo.BOUNDED-8.pals+Problem12_label04.c [2020-12-22 09:41:24,385 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3dbdf1403/d98bd18b425c4421b5096870cfdbd6ee/FLAG47646ec53 [2020-12-22 09:41:24,757 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3dbdf1403/d98bd18b425c4421b5096870cfdbd6ee [2020-12-22 09:41:24,761 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 09:41:24,764 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 09:41:24,769 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 09:41:24,770 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 09:41:24,774 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 09:41:24,776 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:41:24" (1/1) ... [2020-12-22 09:41:24,779 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7081a0ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:41:24, skipping insertion in model container [2020-12-22 09:41:24,779 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:41:24" (1/1) ... [2020-12-22 09:41:24,789 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 09:41:24,978 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 09:41:25,430 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/combinations/pals_lcr.4.1.ufo.BOUNDED-8.pals+Problem12_label04.c[8725,8738] [2020-12-22 09:41:25,498 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/combinations/pals_lcr.4.1.ufo.BOUNDED-8.pals+Problem12_label04.c[15543,15556] [2020-12-22 09:41:26,753 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:41:26,768 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 09:41:26,831 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/combinations/pals_lcr.4.1.ufo.BOUNDED-8.pals+Problem12_label04.c[8725,8738] [2020-12-22 09:41:26,890 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/combinations/pals_lcr.4.1.ufo.BOUNDED-8.pals+Problem12_label04.c[15543,15556] [2020-12-22 09:41:27,602 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:41:27,659 INFO L208 MainTranslator]: Completed translation [2020-12-22 09:41:27,659 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:41:27 WrapperNode [2020-12-22 09:41:27,660 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 09:41:27,662 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 09:41:27,662 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 09:41:27,662 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 09:41:27,671 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:41:27" (1/1) ... [2020-12-22 09:41:27,751 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:41:27" (1/1) ... [2020-12-22 09:41:28,227 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 09:41:28,231 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 09:41:28,231 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 09:41:28,231 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 09:41:28,245 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:41:27" (1/1) ... [2020-12-22 09:41:28,245 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:41:27" (1/1) ... [2020-12-22 09:41:28,341 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:41:27" (1/1) ... [2020-12-22 09:41:28,342 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:41:27" (1/1) ... [2020-12-22 09:41:28,613 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:41:27" (1/1) ... [2020-12-22 09:41:28,685 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:41:27" (1/1) ... [2020-12-22 09:41:28,772 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:41:27" (1/1) ... [2020-12-22 09:41:28,905 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 09:41:28,907 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 09:41:28,908 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 09:41:28,908 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 09:41:28,909 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:41:27" (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 09:41:29,032 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 09:41:29,032 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 09:41:29,033 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 09:41:29,033 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 09:41:34,838 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 09:41:34,838 INFO L299 CfgBuilder]: Removed 32 assume(true) statements. [2020-12-22 09:41:34,842 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:41:34 BoogieIcfgContainer [2020-12-22 09:41:34,843 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 09:41:34,846 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 09:41:34,849 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 09:41:34,852 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 09:41:34,853 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:41:24" (1/3) ... [2020-12-22 09:41:34,854 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9db9be1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:41:34, skipping insertion in model container [2020-12-22 09:41:34,854 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:41:27" (2/3) ... [2020-12-22 09:41:34,855 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9db9be1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:41:34, skipping insertion in model container [2020-12-22 09:41:34,855 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:41:34" (3/3) ... [2020-12-22 09:41:34,856 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.1.ufo.BOUNDED-8.pals+Problem12_label04.c [2020-12-22 09:41:34,869 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 09:41:34,874 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 09:41:34,892 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 09:41:34,927 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 09:41:34,927 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 09:41:34,927 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 09:41:34,928 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 09:41:34,928 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 09:41:34,928 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 09:41:34,928 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 09:41:34,928 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 09:41:34,964 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states. [2020-12-22 09:41:34,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 09:41:34,973 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:34,974 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] [2020-12-22 09:41:34,974 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:34,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:34,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1675876582, now seen corresponding path program 1 times [2020-12-22 09:41:34,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:34,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588393035] [2020-12-22 09:41:34,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:35,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:35,226 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 09:41:35,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588393035] [2020-12-22 09:41:35,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:35,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:41:35,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283038718] [2020-12-22 09:41:35,234 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 09:41:35,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:35,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 09:41:35,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 09:41:35,254 INFO L87 Difference]: Start difference. First operand 893 states. Second operand 2 states. [2020-12-22 09:41:35,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:35,350 INFO L93 Difference]: Finished difference Result 1757 states and 3332 transitions. [2020-12-22 09:41:35,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 09:41:35,352 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 30 [2020-12-22 09:41:35,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:35,398 INFO L225 Difference]: With dead ends: 1757 [2020-12-22 09:41:35,398 INFO L226 Difference]: Without dead ends: 827 [2020-12-22 09:41:35,411 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 09:41:35,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2020-12-22 09:41:35,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 827. [2020-12-22 09:41:35,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 827 states. [2020-12-22 09:41:35,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 1560 transitions. [2020-12-22 09:41:35,553 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 1560 transitions. Word has length 30 [2020-12-22 09:41:35,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:35,553 INFO L481 AbstractCegarLoop]: Abstraction has 827 states and 1560 transitions. [2020-12-22 09:41:35,553 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 09:41:35,554 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 1560 transitions. [2020-12-22 09:41:35,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 09:41:35,557 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:35,557 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] [2020-12-22 09:41:35,558 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 09:41:35,558 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:35,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:35,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1541863076, now seen corresponding path program 1 times [2020-12-22 09:41:35,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:35,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303094522] [2020-12-22 09:41:35,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:35,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:35,732 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 09:41:35,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303094522] [2020-12-22 09:41:35,733 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:35,733 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:41:35,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584370651] [2020-12-22 09:41:35,736 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:41:35,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:35,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:41:35,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:41:35,738 INFO L87 Difference]: Start difference. First operand 827 states and 1560 transitions. Second operand 5 states. [2020-12-22 09:41:35,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:35,884 INFO L93 Difference]: Finished difference Result 919 states and 1702 transitions. [2020-12-22 09:41:35,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:41:35,885 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-12-22 09:41:35,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:35,891 INFO L225 Difference]: With dead ends: 919 [2020-12-22 09:41:35,891 INFO L226 Difference]: Without dead ends: 871 [2020-12-22 09:41:35,893 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:41:35,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2020-12-22 09:41:35,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 827. [2020-12-22 09:41:35,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 827 states. [2020-12-22 09:41:35,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 1537 transitions. [2020-12-22 09:41:35,917 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 1537 transitions. Word has length 30 [2020-12-22 09:41:35,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:35,917 INFO L481 AbstractCegarLoop]: Abstraction has 827 states and 1537 transitions. [2020-12-22 09:41:35,917 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:41:35,918 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 1537 transitions. [2020-12-22 09:41:35,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 09:41:35,920 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:35,920 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] [2020-12-22 09:41:35,920 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 09:41:35,921 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:35,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:35,921 INFO L82 PathProgramCache]: Analyzing trace with hash 159296799, now seen corresponding path program 1 times [2020-12-22 09:41:35,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:35,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116215560] [2020-12-22 09:41:35,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:35,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:36,084 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 09:41:36,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116215560] [2020-12-22 09:41:36,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:36,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:41:36,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990720405] [2020-12-22 09:41:36,089 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:41:36,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:36,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:41:36,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:41:36,093 INFO L87 Difference]: Start difference. First operand 827 states and 1537 transitions. Second operand 3 states. [2020-12-22 09:41:36,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:36,139 INFO L93 Difference]: Finished difference Result 909 states and 1665 transitions. [2020-12-22 09:41:36,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:41:36,140 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-12-22 09:41:36,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:36,146 INFO L225 Difference]: With dead ends: 909 [2020-12-22 09:41:36,146 INFO L226 Difference]: Without dead ends: 865 [2020-12-22 09:41:36,147 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 09:41:36,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 865 states. [2020-12-22 09:41:36,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 865 to 863. [2020-12-22 09:41:36,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 863 states. [2020-12-22 09:41:36,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 1594 transitions. [2020-12-22 09:41:36,177 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 1594 transitions. Word has length 52 [2020-12-22 09:41:36,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:36,178 INFO L481 AbstractCegarLoop]: Abstraction has 863 states and 1594 transitions. [2020-12-22 09:41:36,178 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:41:36,178 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 1594 transitions. [2020-12-22 09:41:36,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 09:41:36,180 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:36,180 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] [2020-12-22 09:41:36,181 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 09:41:36,181 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:36,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:36,182 INFO L82 PathProgramCache]: Analyzing trace with hash -1780734059, now seen corresponding path program 1 times [2020-12-22 09:41:36,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:36,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898259871] [2020-12-22 09:41:36,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:36,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:36,314 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 09:41:36,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898259871] [2020-12-22 09:41:36,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:36,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:41:36,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890552018] [2020-12-22 09:41:36,318 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:41:36,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:36,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:41:36,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:41:36,320 INFO L87 Difference]: Start difference. First operand 863 states and 1594 transitions. Second operand 3 states. [2020-12-22 09:41:36,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:36,363 INFO L93 Difference]: Finished difference Result 1011 states and 1826 transitions. [2020-12-22 09:41:36,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:41:36,364 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-12-22 09:41:36,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:36,370 INFO L225 Difference]: With dead ends: 1011 [2020-12-22 09:41:36,370 INFO L226 Difference]: Without dead ends: 931 [2020-12-22 09:41:36,371 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 09:41:36,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2020-12-22 09:41:36,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 929. [2020-12-22 09:41:36,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 929 states. [2020-12-22 09:41:36,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 929 states to 929 states and 1697 transitions. [2020-12-22 09:41:36,403 INFO L78 Accepts]: Start accepts. Automaton has 929 states and 1697 transitions. Word has length 52 [2020-12-22 09:41:36,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:36,404 INFO L481 AbstractCegarLoop]: Abstraction has 929 states and 1697 transitions. [2020-12-22 09:41:36,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:41:36,404 INFO L276 IsEmpty]: Start isEmpty. Operand 929 states and 1697 transitions. [2020-12-22 09:41:36,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 09:41:36,409 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:36,409 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] [2020-12-22 09:41:36,410 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 09:41:36,410 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:36,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:36,411 INFO L82 PathProgramCache]: Analyzing trace with hash 919948555, now seen corresponding path program 1 times [2020-12-22 09:41:36,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:36,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640677998] [2020-12-22 09:41:36,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:36,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:36,555 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 09:41:36,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640677998] [2020-12-22 09:41:36,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:36,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:41:36,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870303742] [2020-12-22 09:41:36,558 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:41:36,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:36,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:41:36,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:41:36,559 INFO L87 Difference]: Start difference. First operand 929 states and 1697 transitions. Second operand 3 states. [2020-12-22 09:41:36,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:36,625 INFO L93 Difference]: Finished difference Result 1197 states and 2115 transitions. [2020-12-22 09:41:36,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:41:36,626 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-12-22 09:41:36,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:36,635 INFO L225 Difference]: With dead ends: 1197 [2020-12-22 09:41:36,635 INFO L226 Difference]: Without dead ends: 1051 [2020-12-22 09:41:36,637 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 09:41:36,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1051 states. [2020-12-22 09:41:36,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1051 to 1049. [2020-12-22 09:41:36,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1049 states. [2020-12-22 09:41:36,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1049 states to 1049 states and 1881 transitions. [2020-12-22 09:41:36,687 INFO L78 Accepts]: Start accepts. Automaton has 1049 states and 1881 transitions. Word has length 52 [2020-12-22 09:41:36,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:36,688 INFO L481 AbstractCegarLoop]: Abstraction has 1049 states and 1881 transitions. [2020-12-22 09:41:36,688 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:41:36,688 INFO L276 IsEmpty]: Start isEmpty. Operand 1049 states and 1881 transitions. [2020-12-22 09:41:36,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 09:41:36,690 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:36,691 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] [2020-12-22 09:41:36,691 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 09:41:36,691 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:36,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:36,692 INFO L82 PathProgramCache]: Analyzing trace with hash 1515907135, now seen corresponding path program 1 times [2020-12-22 09:41:36,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:36,692 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044351611] [2020-12-22 09:41:36,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:36,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:36,821 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 09:41:36,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044351611] [2020-12-22 09:41:36,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:36,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:41:36,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670054030] [2020-12-22 09:41:36,824 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:41:36,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:36,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:41:36,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:41:36,826 INFO L87 Difference]: Start difference. First operand 1049 states and 1881 transitions. Second operand 3 states. [2020-12-22 09:41:36,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:36,890 INFO L93 Difference]: Finished difference Result 1533 states and 2627 transitions. [2020-12-22 09:41:36,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:41:36,891 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-12-22 09:41:36,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:36,902 INFO L225 Difference]: With dead ends: 1533 [2020-12-22 09:41:36,902 INFO L226 Difference]: Without dead ends: 1267 [2020-12-22 09:41:36,903 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 09:41:36,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2020-12-22 09:41:36,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 1265. [2020-12-22 09:41:36,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1265 states. [2020-12-22 09:41:36,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1265 states to 1265 states and 2205 transitions. [2020-12-22 09:41:36,955 INFO L78 Accepts]: Start accepts. Automaton has 1265 states and 2205 transitions. Word has length 52 [2020-12-22 09:41:36,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:36,958 INFO L481 AbstractCegarLoop]: Abstraction has 1265 states and 2205 transitions. [2020-12-22 09:41:36,958 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:41:36,958 INFO L276 IsEmpty]: Start isEmpty. Operand 1265 states and 2205 transitions. [2020-12-22 09:41:36,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 09:41:36,959 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:36,959 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] [2020-12-22 09:41:36,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 09:41:36,960 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:36,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:36,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1924545907, now seen corresponding path program 1 times [2020-12-22 09:41:36,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:36,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653982606] [2020-12-22 09:41:36,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:37,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:37,075 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 09:41:37,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653982606] [2020-12-22 09:41:37,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:37,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:41:37,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465922542] [2020-12-22 09:41:37,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:41:37,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:37,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:41:37,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:41:37,079 INFO L87 Difference]: Start difference. First operand 1265 states and 2205 transitions. Second operand 6 states. [2020-12-22 09:41:37,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:37,431 INFO L93 Difference]: Finished difference Result 5121 states and 8101 transitions. [2020-12-22 09:41:37,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 09:41:37,432 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 52 [2020-12-22 09:41:37,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:37,458 INFO L225 Difference]: With dead ends: 5121 [2020-12-22 09:41:37,459 INFO L226 Difference]: Without dead ends: 4639 [2020-12-22 09:41:37,462 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:41:37,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4639 states. [2020-12-22 09:41:37,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4639 to 1745. [2020-12-22 09:41:37,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1745 states. [2020-12-22 09:41:37,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1745 states to 1745 states and 2909 transitions. [2020-12-22 09:41:37,585 INFO L78 Accepts]: Start accepts. Automaton has 1745 states and 2909 transitions. Word has length 52 [2020-12-22 09:41:37,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:37,585 INFO L481 AbstractCegarLoop]: Abstraction has 1745 states and 2909 transitions. [2020-12-22 09:41:37,585 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:41:37,585 INFO L276 IsEmpty]: Start isEmpty. Operand 1745 states and 2909 transitions. [2020-12-22 09:41:37,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 09:41:37,586 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:37,586 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] [2020-12-22 09:41:37,586 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 09:41:37,587 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:37,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:37,587 INFO L82 PathProgramCache]: Analyzing trace with hash 1236981091, now seen corresponding path program 1 times [2020-12-22 09:41:37,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:37,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49519103] [2020-12-22 09:41:37,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:37,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:37,656 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 09:41:37,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49519103] [2020-12-22 09:41:37,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:37,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:41:37,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259187594] [2020-12-22 09:41:37,658 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:41:37,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:37,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:41:37,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:41:37,660 INFO L87 Difference]: Start difference. First operand 1745 states and 2909 transitions. Second operand 3 states. [2020-12-22 09:41:37,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:37,776 INFO L93 Difference]: Finished difference Result 3151 states and 5009 transitions. [2020-12-22 09:41:37,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:41:37,777 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 54 [2020-12-22 09:41:37,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:37,790 INFO L225 Difference]: With dead ends: 3151 [2020-12-22 09:41:37,790 INFO L226 Difference]: Without dead ends: 2189 [2020-12-22 09:41:37,793 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 09:41:37,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2189 states. [2020-12-22 09:41:37,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2189 to 2187. [2020-12-22 09:41:37,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2187 states. [2020-12-22 09:41:37,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2187 states to 2187 states and 3543 transitions. [2020-12-22 09:41:37,897 INFO L78 Accepts]: Start accepts. Automaton has 2187 states and 3543 transitions. Word has length 54 [2020-12-22 09:41:37,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:37,897 INFO L481 AbstractCegarLoop]: Abstraction has 2187 states and 3543 transitions. [2020-12-22 09:41:37,897 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:41:37,898 INFO L276 IsEmpty]: Start isEmpty. Operand 2187 states and 3543 transitions. [2020-12-22 09:41:37,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 09:41:37,898 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:37,898 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] [2020-12-22 09:41:37,899 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 09:41:37,899 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:37,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:37,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1303474603, now seen corresponding path program 1 times [2020-12-22 09:41:37,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:37,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059459761] [2020-12-22 09:41:37,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:37,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:38,142 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 09:41:38,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059459761] [2020-12-22 09:41:38,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:38,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:41:38,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322372951] [2020-12-22 09:41:38,144 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:41:38,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:38,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:41:38,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:41:38,145 INFO L87 Difference]: Start difference. First operand 2187 states and 3543 transitions. Second operand 6 states. [2020-12-22 09:41:38,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:38,384 INFO L93 Difference]: Finished difference Result 3591 states and 5617 transitions. [2020-12-22 09:41:38,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:41:38,385 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 54 [2020-12-22 09:41:38,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:38,396 INFO L225 Difference]: With dead ends: 3591 [2020-12-22 09:41:38,397 INFO L226 Difference]: Without dead ends: 2189 [2020-12-22 09:41:38,401 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:41:38,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2189 states. [2020-12-22 09:41:38,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2189 to 2187. [2020-12-22 09:41:38,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2187 states. [2020-12-22 09:41:38,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2187 states to 2187 states and 3519 transitions. [2020-12-22 09:41:38,507 INFO L78 Accepts]: Start accepts. Automaton has 2187 states and 3519 transitions. Word has length 54 [2020-12-22 09:41:38,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:38,507 INFO L481 AbstractCegarLoop]: Abstraction has 2187 states and 3519 transitions. [2020-12-22 09:41:38,508 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:41:38,508 INFO L276 IsEmpty]: Start isEmpty. Operand 2187 states and 3519 transitions. [2020-12-22 09:41:38,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 09:41:38,508 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:38,509 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] [2020-12-22 09:41:38,509 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 09:41:38,509 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:38,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:38,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1338283904, now seen corresponding path program 1 times [2020-12-22 09:41:38,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:38,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267881854] [2020-12-22 09:41:38,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:38,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:38,627 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 09:41:38,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267881854] [2020-12-22 09:41:38,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:38,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:41:38,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346678963] [2020-12-22 09:41:38,629 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:41:38,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:38,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:41:38,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:41:38,633 INFO L87 Difference]: Start difference. First operand 2187 states and 3519 transitions. Second operand 6 states. [2020-12-22 09:41:38,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:38,853 INFO L93 Difference]: Finished difference Result 3589 states and 5568 transitions. [2020-12-22 09:41:38,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:41:38,854 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-12-22 09:41:38,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:38,865 INFO L225 Difference]: With dead ends: 3589 [2020-12-22 09:41:38,865 INFO L226 Difference]: Without dead ends: 2187 [2020-12-22 09:41:38,869 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:41:38,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2187 states. [2020-12-22 09:41:38,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2187 to 2187. [2020-12-22 09:41:38,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2187 states. [2020-12-22 09:41:38,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2187 states to 2187 states and 3495 transitions. [2020-12-22 09:41:38,984 INFO L78 Accepts]: Start accepts. Automaton has 2187 states and 3495 transitions. Word has length 55 [2020-12-22 09:41:38,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:38,984 INFO L481 AbstractCegarLoop]: Abstraction has 2187 states and 3495 transitions. [2020-12-22 09:41:38,984 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:41:38,984 INFO L276 IsEmpty]: Start isEmpty. Operand 2187 states and 3495 transitions. [2020-12-22 09:41:38,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 09:41:38,985 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:38,985 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] [2020-12-22 09:41:38,985 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 09:41:38,985 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:38,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:38,986 INFO L82 PathProgramCache]: Analyzing trace with hash 637219326, now seen corresponding path program 1 times [2020-12-22 09:41:38,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:38,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736044841] [2020-12-22 09:41:38,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:39,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:39,063 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 09:41:39,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736044841] [2020-12-22 09:41:39,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:39,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:41:39,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880955080] [2020-12-22 09:41:39,065 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:41:39,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:39,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:41:39,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:41:39,068 INFO L87 Difference]: Start difference. First operand 2187 states and 3495 transitions. Second operand 6 states. [2020-12-22 09:41:39,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:39,313 INFO L93 Difference]: Finished difference Result 3589 states and 5520 transitions. [2020-12-22 09:41:39,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:41:39,314 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-12-22 09:41:39,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:39,326 INFO L225 Difference]: With dead ends: 3589 [2020-12-22 09:41:39,327 INFO L226 Difference]: Without dead ends: 2187 [2020-12-22 09:41:39,330 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:41:39,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2187 states. [2020-12-22 09:41:39,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2187 to 2187. [2020-12-22 09:41:39,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2187 states. [2020-12-22 09:41:39,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2187 states to 2187 states and 3471 transitions. [2020-12-22 09:41:39,451 INFO L78 Accepts]: Start accepts. Automaton has 2187 states and 3471 transitions. Word has length 55 [2020-12-22 09:41:39,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:39,451 INFO L481 AbstractCegarLoop]: Abstraction has 2187 states and 3471 transitions. [2020-12-22 09:41:39,451 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:41:39,452 INFO L276 IsEmpty]: Start isEmpty. Operand 2187 states and 3471 transitions. [2020-12-22 09:41:39,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 09:41:39,452 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:39,452 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] [2020-12-22 09:41:39,452 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 09:41:39,453 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:39,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:39,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1917083004, now seen corresponding path program 1 times [2020-12-22 09:41:39,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:39,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472403591] [2020-12-22 09:41:39,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:39,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:39,542 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 09:41:39,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472403591] [2020-12-22 09:41:39,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:39,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:41:39,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84237240] [2020-12-22 09:41:39,543 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:41:39,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:39,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:41:39,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:41:39,544 INFO L87 Difference]: Start difference. First operand 2187 states and 3471 transitions. Second operand 5 states. [2020-12-22 09:41:39,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:39,806 INFO L93 Difference]: Finished difference Result 3418 states and 5169 transitions. [2020-12-22 09:41:39,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:41:39,807 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 55 [2020-12-22 09:41:39,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:39,824 INFO L225 Difference]: With dead ends: 3418 [2020-12-22 09:41:39,824 INFO L226 Difference]: Without dead ends: 3416 [2020-12-22 09:41:39,826 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:41:39,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3416 states. [2020-12-22 09:41:40,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3416 to 2283. [2020-12-22 09:41:40,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2283 states. [2020-12-22 09:41:40,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2283 states to 2283 states and 3559 transitions. [2020-12-22 09:41:40,049 INFO L78 Accepts]: Start accepts. Automaton has 2283 states and 3559 transitions. Word has length 55 [2020-12-22 09:41:40,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:40,050 INFO L481 AbstractCegarLoop]: Abstraction has 2283 states and 3559 transitions. [2020-12-22 09:41:40,050 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:41:40,050 INFO L276 IsEmpty]: Start isEmpty. Operand 2283 states and 3559 transitions. [2020-12-22 09:41:40,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-22 09:41:40,054 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:40,054 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] [2020-12-22 09:41:40,055 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 09:41:40,057 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:40,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:40,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1641000780, now seen corresponding path program 1 times [2020-12-22 09:41:40,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:40,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012492299] [2020-12-22 09:41:40,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:40,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:40,175 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 09:41:40,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012492299] [2020-12-22 09:41:40,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:40,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:41:40,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961899937] [2020-12-22 09:41:40,177 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:41:40,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:40,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:41:40,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:41:40,178 INFO L87 Difference]: Start difference. First operand 2283 states and 3559 transitions. Second operand 4 states. [2020-12-22 09:41:51,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:51,918 INFO L93 Difference]: Finished difference Result 4538 states and 7868 transitions. [2020-12-22 09:41:51,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:41:51,918 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 61 [2020-12-22 09:41:51,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:51,940 INFO L225 Difference]: With dead ends: 4538 [2020-12-22 09:41:51,940 INFO L226 Difference]: Without dead ends: 3785 [2020-12-22 09:41:51,943 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 09:41:51,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3785 states. [2020-12-22 09:41:52,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3785 to 3785. [2020-12-22 09:41:52,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3785 states. [2020-12-22 09:41:52,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3785 states to 3785 states and 5673 transitions. [2020-12-22 09:41:52,174 INFO L78 Accepts]: Start accepts. Automaton has 3785 states and 5673 transitions. Word has length 61 [2020-12-22 09:41:52,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:52,174 INFO L481 AbstractCegarLoop]: Abstraction has 3785 states and 5673 transitions. [2020-12-22 09:41:52,174 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:41:52,174 INFO L276 IsEmpty]: Start isEmpty. Operand 3785 states and 5673 transitions. [2020-12-22 09:41:52,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 09:41:52,177 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:52,177 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:41:52,178 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 09:41:52,178 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:52,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:52,179 INFO L82 PathProgramCache]: Analyzing trace with hash -484645446, now seen corresponding path program 1 times [2020-12-22 09:41:52,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:52,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907396379] [2020-12-22 09:41:52,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:52,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:52,300 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 09:41:52,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907396379] [2020-12-22 09:41:52,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:52,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:41:52,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396787418] [2020-12-22 09:41:52,302 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:41:52,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:52,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:41:52,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:41:52,303 INFO L87 Difference]: Start difference. First operand 3785 states and 5673 transitions. Second operand 6 states. [2020-12-22 09:41:53,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:53,043 INFO L93 Difference]: Finished difference Result 10091 states and 14442 transitions. [2020-12-22 09:41:53,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:41:53,044 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 79 [2020-12-22 09:41:53,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:53,092 INFO L225 Difference]: With dead ends: 10091 [2020-12-22 09:41:53,092 INFO L226 Difference]: Without dead ends: 8593 [2020-12-22 09:41:53,099 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:41:53,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8593 states. [2020-12-22 09:41:53,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8593 to 5281. [2020-12-22 09:41:53,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5281 states. [2020-12-22 09:41:53,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5281 states to 5281 states and 7737 transitions. [2020-12-22 09:41:53,619 INFO L78 Accepts]: Start accepts. Automaton has 5281 states and 7737 transitions. Word has length 79 [2020-12-22 09:41:53,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:53,620 INFO L481 AbstractCegarLoop]: Abstraction has 5281 states and 7737 transitions. [2020-12-22 09:41:53,620 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:41:53,620 INFO L276 IsEmpty]: Start isEmpty. Operand 5281 states and 7737 transitions. [2020-12-22 09:41:53,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 09:41:53,622 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:53,622 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:41:53,623 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 09:41:53,623 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:53,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:53,623 INFO L82 PathProgramCache]: Analyzing trace with hash 2041539034, now seen corresponding path program 1 times [2020-12-22 09:41:53,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:53,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328170892] [2020-12-22 09:41:53,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:53,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:53,710 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 09:41:53,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328170892] [2020-12-22 09:41:53,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:53,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:41:53,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108890957] [2020-12-22 09:41:53,712 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:41:53,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:53,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:41:53,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:41:53,713 INFO L87 Difference]: Start difference. First operand 5281 states and 7737 transitions. Second operand 6 states. [2020-12-22 09:41:54,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:54,393 INFO L93 Difference]: Finished difference Result 11587 states and 16506 transitions. [2020-12-22 09:41:54,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:41:54,394 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 79 [2020-12-22 09:41:54,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:54,424 INFO L225 Difference]: With dead ends: 11587 [2020-12-22 09:41:54,424 INFO L226 Difference]: Without dead ends: 10089 [2020-12-22 09:41:54,433 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:41:54,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10089 states. [2020-12-22 09:41:54,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10089 to 7529. [2020-12-22 09:41:54,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7529 states. [2020-12-22 09:41:54,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7529 states to 7529 states and 10813 transitions. [2020-12-22 09:41:54,925 INFO L78 Accepts]: Start accepts. Automaton has 7529 states and 10813 transitions. Word has length 79 [2020-12-22 09:41:54,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:54,925 INFO L481 AbstractCegarLoop]: Abstraction has 7529 states and 10813 transitions. [2020-12-22 09:41:54,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:41:54,926 INFO L276 IsEmpty]: Start isEmpty. Operand 7529 states and 10813 transitions. [2020-12-22 09:41:54,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 09:41:54,928 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:54,929 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:41:54,929 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 09:41:54,929 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:54,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:54,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1121788422, now seen corresponding path program 1 times [2020-12-22 09:41:54,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:54,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273371720] [2020-12-22 09:41:54,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:54,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:55,029 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 09:41:55,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273371720] [2020-12-22 09:41:55,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:55,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:41:55,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837793918] [2020-12-22 09:41:55,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:41:55,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:55,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:41:55,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:41:55,035 INFO L87 Difference]: Start difference. First operand 7529 states and 10813 transitions. Second operand 6 states. [2020-12-22 09:41:55,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:55,784 INFO L93 Difference]: Finished difference Result 13083 states and 18570 transitions. [2020-12-22 09:41:55,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:41:55,785 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 79 [2020-12-22 09:41:55,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:55,809 INFO L225 Difference]: With dead ends: 13083 [2020-12-22 09:41:55,810 INFO L226 Difference]: Without dead ends: 11585 [2020-12-22 09:41:55,817 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:41:55,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11585 states. [2020-12-22 09:41:56,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11585 to 9025. [2020-12-22 09:41:56,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9025 states. [2020-12-22 09:41:56,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9025 states to 9025 states and 12877 transitions. [2020-12-22 09:41:56,463 INFO L78 Accepts]: Start accepts. Automaton has 9025 states and 12877 transitions. Word has length 79 [2020-12-22 09:41:56,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:56,463 INFO L481 AbstractCegarLoop]: Abstraction has 9025 states and 12877 transitions. [2020-12-22 09:41:56,463 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:41:56,463 INFO L276 IsEmpty]: Start isEmpty. Operand 9025 states and 12877 transitions. [2020-12-22 09:41:56,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 09:41:56,466 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:56,466 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:41:56,466 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 09:41:56,467 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:56,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:56,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1937719834, now seen corresponding path program 1 times [2020-12-22 09:41:56,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:56,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078684248] [2020-12-22 09:41:56,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:56,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:56,559 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:41:56,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078684248] [2020-12-22 09:41:56,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:56,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:41:56,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838437371] [2020-12-22 09:41:56,561 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:41:56,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:56,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:41:56,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:41:56,562 INFO L87 Difference]: Start difference. First operand 9025 states and 12877 transitions. Second operand 6 states. [2020-12-22 09:41:57,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:57,215 INFO L93 Difference]: Finished difference Result 13699 states and 19434 transitions. [2020-12-22 09:41:57,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:41:57,215 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 79 [2020-12-22 09:41:57,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:57,241 INFO L225 Difference]: With dead ends: 13699 [2020-12-22 09:41:57,241 INFO L226 Difference]: Without dead ends: 12641 [2020-12-22 09:41:57,248 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:41:57,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12641 states. [2020-12-22 09:41:58,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12641 to 10081. [2020-12-22 09:41:58,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10081 states. [2020-12-22 09:41:58,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10081 states to 10081 states and 14349 transitions. [2020-12-22 09:41:58,025 INFO L78 Accepts]: Start accepts. Automaton has 10081 states and 14349 transitions. Word has length 79 [2020-12-22 09:41:58,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:58,025 INFO L481 AbstractCegarLoop]: Abstraction has 10081 states and 14349 transitions. [2020-12-22 09:41:58,025 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:41:58,025 INFO L276 IsEmpty]: Start isEmpty. Operand 10081 states and 14349 transitions. [2020-12-22 09:41:58,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 09:41:58,032 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:58,032 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:41:58,032 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 09:41:58,032 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:58,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:58,033 INFO L82 PathProgramCache]: Analyzing trace with hash -596667294, now seen corresponding path program 1 times [2020-12-22 09:41:58,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:58,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773030696] [2020-12-22 09:41:58,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:58,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:58,246 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:41:58,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773030696] [2020-12-22 09:41:58,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959794566] [2020-12-22 09:41:58,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:41:58,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:58,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 09:41:58,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:41:58,703 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:41:59,125 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:41:59,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:41:59,126 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-12-22 09:41:59,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82383214] [2020-12-22 09:41:59,126 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 09:41:59,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:59,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 09:41:59,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2020-12-22 09:41:59,128 INFO L87 Difference]: Start difference. First operand 10081 states and 14349 transitions. Second operand 18 states. [2020-12-22 09:41:59,256 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 09:42:01,415 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 09:42:02,471 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-12-22 09:42:03,088 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-12-22 09:42:03,571 WARN L197 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2020-12-22 09:42:04,695 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 09:42:05,756 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2020-12-22 09:42:06,232 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 09:42:08,473 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 09:42:09,055 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 09:42:09,227 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 09:42:09,707 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-12-22 09:42:10,116 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-12-22 09:42:10,620 WARN L197 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-12-22 09:42:11,347 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-12-22 09:42:12,594 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-12-22 09:42:13,210 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-12-22 09:42:13,342 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 09:42:13,664 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 09:42:17,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:42:17,660 INFO L93 Difference]: Finished difference Result 79147 states and 108322 transitions. [2020-12-22 09:42:17,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2020-12-22 09:42:17,660 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 80 [2020-12-22 09:42:17,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:42:17,782 INFO L225 Difference]: With dead ends: 79147 [2020-12-22 09:42:17,782 INFO L226 Difference]: Without dead ends: 71353 [2020-12-22 09:42:17,815 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6416 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=2552, Invalid=14478, Unknown=0, NotChecked=0, Total=17030 [2020-12-22 09:42:17,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71353 states. [2020-12-22 09:42:21,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71353 to 35561. [2020-12-22 09:42:21,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35561 states. [2020-12-22 09:42:21,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35561 states to 35561 states and 49291 transitions. [2020-12-22 09:42:21,739 INFO L78 Accepts]: Start accepts. Automaton has 35561 states and 49291 transitions. Word has length 80 [2020-12-22 09:42:21,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:42:21,740 INFO L481 AbstractCegarLoop]: Abstraction has 35561 states and 49291 transitions. [2020-12-22 09:42:21,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 09:42:21,740 INFO L276 IsEmpty]: Start isEmpty. Operand 35561 states and 49291 transitions. [2020-12-22 09:42:21,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:42:21,746 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:42:21,746 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:42:21,957 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 09:42:21,958 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:42:21,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:42:21,959 INFO L82 PathProgramCache]: Analyzing trace with hash -808690280, now seen corresponding path program 1 times [2020-12-22 09:42:21,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:42:21,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661921228] [2020-12-22 09:42:21,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:42:22,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:42:22,121 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:42:22,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661921228] [2020-12-22 09:42:22,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:42:22,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:42:22,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979611031] [2020-12-22 09:42:22,124 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:42:22,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:42:22,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:42:22,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:42:22,125 INFO L87 Difference]: Start difference. First operand 35561 states and 49291 transitions. Second operand 3 states. [2020-12-22 09:42:24,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:42:24,653 INFO L93 Difference]: Finished difference Result 68837 states and 94999 transitions. [2020-12-22 09:42:24,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:42:24,654 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2020-12-22 09:42:24,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:42:24,707 INFO L225 Difference]: With dead ends: 68837 [2020-12-22 09:42:24,707 INFO L226 Difference]: Without dead ends: 35563 [2020-12-22 09:42:24,763 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 09:42:24,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35563 states. [2020-12-22 09:42:27,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35563 to 34601. [2020-12-22 09:42:27,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34601 states. [2020-12-22 09:42:27,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34601 states to 34601 states and 47287 transitions. [2020-12-22 09:42:27,941 INFO L78 Accepts]: Start accepts. Automaton has 34601 states and 47287 transitions. Word has length 81 [2020-12-22 09:42:27,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:42:27,942 INFO L481 AbstractCegarLoop]: Abstraction has 34601 states and 47287 transitions. [2020-12-22 09:42:27,942 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:42:27,942 INFO L276 IsEmpty]: Start isEmpty. Operand 34601 states and 47287 transitions. [2020-12-22 09:42:27,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:42:27,946 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:42:27,946 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:42:27,946 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 09:42:27,946 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:42:27,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:42:27,947 INFO L82 PathProgramCache]: Analyzing trace with hash 188383332, now seen corresponding path program 1 times [2020-12-22 09:42:27,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:42:27,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790709022] [2020-12-22 09:42:27,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:42:27,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:42:28,202 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:42:28,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790709022] [2020-12-22 09:42:28,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332464333] [2020-12-22 09:42:28,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:42:28,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:42:28,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 09:42:28,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:42:28,629 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:42:29,046 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:42:29,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:42:29,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-12-22 09:42:29,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463891788] [2020-12-22 09:42:29,047 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 09:42:29,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:42:29,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 09:42:29,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2020-12-22 09:42:29,049 INFO L87 Difference]: Start difference. First operand 34601 states and 47287 transitions. Second operand 18 states. [2020-12-22 09:42:29,228 WARN L197 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-12-22 09:42:29,490 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-12-22 09:42:29,633 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-12-22 09:42:29,779 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2020-12-22 09:42:31,093 WARN L197 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2020-12-22 09:42:35,284 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-12-22 09:42:35,800 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-12-22 09:42:36,116 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-12-22 09:42:36,257 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-12-22 09:42:36,704 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2020-12-22 09:42:37,271 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2020-12-22 09:42:37,496 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2020-12-22 09:42:37,822 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2020-12-22 09:42:38,658 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-12-22 09:42:39,113 WARN L197 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-12-22 09:42:39,292 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2020-12-22 09:42:39,685 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-12-22 09:42:40,964 WARN L197 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-12-22 09:42:41,599 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-12-22 09:42:41,931 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2020-12-22 09:42:46,430 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-12-22 09:42:46,851 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-12-22 09:42:47,583 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2020-12-22 09:42:47,863 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2020-12-22 09:42:48,946 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-12-22 09:42:57,729 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-12-22 09:42:58,329 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-12-22 09:43:02,390 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-12-22 09:43:03,064 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-12-22 09:43:08,502 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-12-22 09:43:09,128 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-12-22 09:43:14,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:43:14,560 INFO L93 Difference]: Finished difference Result 360828 states and 480117 transitions. [2020-12-22 09:43:14,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2020-12-22 09:43:14,561 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 81 [2020-12-22 09:43:14,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:43:15,285 INFO L225 Difference]: With dead ends: 360828 [2020-12-22 09:43:15,286 INFO L226 Difference]: Without dead ends: 328514 [2020-12-22 09:43:15,393 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6667 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=2700, Invalid=15390, Unknown=0, NotChecked=0, Total=18090 [2020-12-22 09:43:15,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328514 states. [2020-12-22 09:43:33,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328514 to 161412. [2020-12-22 09:43:33,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161412 states. [2020-12-22 09:43:33,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161412 states to 161412 states and 217153 transitions. [2020-12-22 09:43:33,375 INFO L78 Accepts]: Start accepts. Automaton has 161412 states and 217153 transitions. Word has length 81 [2020-12-22 09:43:33,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:43:33,375 INFO L481 AbstractCegarLoop]: Abstraction has 161412 states and 217153 transitions. [2020-12-22 09:43:33,376 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 09:43:33,376 INFO L276 IsEmpty]: Start isEmpty. Operand 161412 states and 217153 transitions. [2020-12-22 09:43:33,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:43:33,382 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:43:33,382 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:43:33,690 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:43:33,691 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:43:33,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:43:33,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1744161872, now seen corresponding path program 1 times [2020-12-22 09:43:33,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:43:33,692 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270251675] [2020-12-22 09:43:33,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:43:33,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:43:33,758 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:43:33,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270251675] [2020-12-22 09:43:33,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:43:33,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:43:33,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350413488] [2020-12-22 09:43:33,765 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:43:33,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:43:33,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:43:33,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:43:33,765 INFO L87 Difference]: Start difference. First operand 161412 states and 217153 transitions. Second operand 3 states. [2020-12-22 09:43:42,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:43:42,907 INFO L93 Difference]: Finished difference Result 249776 states and 335369 transitions. [2020-12-22 09:43:42,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:43:42,908 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2020-12-22 09:43:42,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:43:43,070 INFO L225 Difference]: With dead ends: 249776 [2020-12-22 09:43:43,070 INFO L226 Difference]: Without dead ends: 90651 [2020-12-22 09:43:43,191 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 09:43:43,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90651 states. [2020-12-22 09:43:51,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90651 to 90649. [2020-12-22 09:43:51,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90649 states. [2020-12-22 09:43:51,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90649 states to 90649 states and 120175 transitions. [2020-12-22 09:43:51,936 INFO L78 Accepts]: Start accepts. Automaton has 90649 states and 120175 transitions. Word has length 81 [2020-12-22 09:43:51,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:43:51,936 INFO L481 AbstractCegarLoop]: Abstraction has 90649 states and 120175 transitions. [2020-12-22 09:43:51,936 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:43:51,937 INFO L276 IsEmpty]: Start isEmpty. Operand 90649 states and 120175 transitions. [2020-12-22 09:43:51,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:43:51,941 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:43:51,941 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:43:51,942 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 09:43:51,942 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:43:51,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:43:51,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1394309904, now seen corresponding path program 1 times [2020-12-22 09:43:51,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:43:51,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351157529] [2020-12-22 09:43:51,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:43:52,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:43:52,199 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:43:52,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351157529] [2020-12-22 09:43:52,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:43:52,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:43:52,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141569353] [2020-12-22 09:43:52,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:43:52,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:43:52,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:43:52,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:43:52,204 INFO L87 Difference]: Start difference. First operand 90649 states and 120175 transitions. Second operand 3 states. [2020-12-22 09:43:55,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:43:55,548 INFO L93 Difference]: Finished difference Result 115746 states and 153823 transitions. [2020-12-22 09:43:55,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:43:55,549 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2020-12-22 09:43:55,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:43:55,587 INFO L225 Difference]: With dead ends: 115746 [2020-12-22 09:43:55,587 INFO L226 Difference]: Without dead ends: 27384 [2020-12-22 09:43:55,625 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 09:43:55,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27384 states. [2020-12-22 09:43:58,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27384 to 27382. [2020-12-22 09:43:58,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27382 states. [2020-12-22 09:43:58,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27382 states to 27382 states and 36771 transitions. [2020-12-22 09:43:58,206 INFO L78 Accepts]: Start accepts. Automaton has 27382 states and 36771 transitions. Word has length 81 [2020-12-22 09:43:58,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:43:58,206 INFO L481 AbstractCegarLoop]: Abstraction has 27382 states and 36771 transitions. [2020-12-22 09:43:58,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:43:58,206 INFO L276 IsEmpty]: Start isEmpty. Operand 27382 states and 36771 transitions. [2020-12-22 09:43:58,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:43:58,210 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:43:58,210 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:43:58,210 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 09:43:58,210 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:43:58,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:43:58,211 INFO L82 PathProgramCache]: Analyzing trace with hash -1995112228, now seen corresponding path program 1 times [2020-12-22 09:43:58,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:43:58,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362309324] [2020-12-22 09:43:58,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:43:58,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:43:58,282 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-22 09:43:58,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362309324] [2020-12-22 09:43:58,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:43:58,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:43:58,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140588965] [2020-12-22 09:43:58,283 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:43:58,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:43:58,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:43:58,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:43:58,284 INFO L87 Difference]: Start difference. First operand 27382 states and 36771 transitions. Second operand 6 states. [2020-12-22 09:43:59,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:43:59,959 INFO L93 Difference]: Finished difference Result 41424 states and 55317 transitions. [2020-12-22 09:43:59,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:43:59,960 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 81 [2020-12-22 09:43:59,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:43:59,978 INFO L225 Difference]: With dead ends: 41424 [2020-12-22 09:43:59,982 INFO L226 Difference]: Without dead ends: 16388 [2020-12-22 09:43:59,996 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:44:00,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16388 states. [2020-12-22 09:44:01,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16388 to 16388. [2020-12-22 09:44:01,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16388 states. [2020-12-22 09:44:01,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16388 states to 16388 states and 21966 transitions. [2020-12-22 09:44:01,618 INFO L78 Accepts]: Start accepts. Automaton has 16388 states and 21966 transitions. Word has length 81 [2020-12-22 09:44:01,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:44:01,618 INFO L481 AbstractCegarLoop]: Abstraction has 16388 states and 21966 transitions. [2020-12-22 09:44:01,618 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:44:01,618 INFO L276 IsEmpty]: Start isEmpty. Operand 16388 states and 21966 transitions. [2020-12-22 09:44:01,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:44:01,621 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:44:01,621 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:44:01,621 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 09:44:01,621 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:44:01,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:44:01,622 INFO L82 PathProgramCache]: Analyzing trace with hash 259210172, now seen corresponding path program 1 times [2020-12-22 09:44:01,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:44:01,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678887103] [2020-12-22 09:44:01,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:44:01,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:44:01,696 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-22 09:44:01,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678887103] [2020-12-22 09:44:01,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:44:01,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:44:01,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997546645] [2020-12-22 09:44:01,698 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:44:01,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:44:01,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:44:01,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:44:01,698 INFO L87 Difference]: Start difference. First operand 16388 states and 21966 transitions. Second operand 6 states. [2020-12-22 09:44:04,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:44:04,223 INFO L93 Difference]: Finished difference Result 40760 states and 54022 transitions. [2020-12-22 09:44:04,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:44:04,224 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 81 [2020-12-22 09:44:04,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:44:04,254 INFO L225 Difference]: With dead ends: 40760 [2020-12-22 09:44:04,254 INFO L226 Difference]: Without dead ends: 26691 [2020-12-22 09:44:04,265 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:44:04,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26691 states. [2020-12-22 09:44:06,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26691 to 23873. [2020-12-22 09:44:06,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23873 states. [2020-12-22 09:44:06,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23873 states to 23873 states and 31643 transitions. [2020-12-22 09:44:06,552 INFO L78 Accepts]: Start accepts. Automaton has 23873 states and 31643 transitions. Word has length 81 [2020-12-22 09:44:06,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:44:06,552 INFO L481 AbstractCegarLoop]: Abstraction has 23873 states and 31643 transitions. [2020-12-22 09:44:06,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:44:06,552 INFO L276 IsEmpty]: Start isEmpty. Operand 23873 states and 31643 transitions. [2020-12-22 09:44:06,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 09:44:06,555 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:44:06,556 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:44:06,556 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-22 09:44:06,556 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:44:06,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:44:06,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1802178222, now seen corresponding path program 1 times [2020-12-22 09:44:06,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:44:06,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626768864] [2020-12-22 09:44:06,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:44:06,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:44:06,605 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:44:06,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626768864] [2020-12-22 09:44:06,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:44:06,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:44:06,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374718484] [2020-12-22 09:44:06,607 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:44:06,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:44:06,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:44:06,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:44:06,607 INFO L87 Difference]: Start difference. First operand 23873 states and 31643 transitions. Second operand 3 states. [2020-12-22 09:44:08,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:44:08,134 INFO L93 Difference]: Finished difference Result 34677 states and 45587 transitions. [2020-12-22 09:44:08,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:44:08,134 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 82 [2020-12-22 09:44:08,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:44:08,158 INFO L225 Difference]: With dead ends: 34677 [2020-12-22 09:44:08,158 INFO L226 Difference]: Without dead ends: 13127 [2020-12-22 09:44:08,166 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 09:44:08,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13127 states. [2020-12-22 09:44:09,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13127 to 13125. [2020-12-22 09:44:09,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13125 states. [2020-12-22 09:44:09,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13125 states to 13125 states and 17365 transitions. [2020-12-22 09:44:09,313 INFO L78 Accepts]: Start accepts. Automaton has 13125 states and 17365 transitions. Word has length 82 [2020-12-22 09:44:09,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:44:09,313 INFO L481 AbstractCegarLoop]: Abstraction has 13125 states and 17365 transitions. [2020-12-22 09:44:09,313 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:44:09,313 INFO L276 IsEmpty]: Start isEmpty. Operand 13125 states and 17365 transitions. [2020-12-22 09:44:09,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 09:44:09,315 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:44:09,316 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:44:09,316 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-12-22 09:44:09,316 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:44:09,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:44:09,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1782997605, now seen corresponding path program 1 times [2020-12-22 09:44:09,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:44:09,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85321374] [2020-12-22 09:44:09,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:44:09,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:44:09,999 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:44:10,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85321374] [2020-12-22 09:44:10,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688384272] [2020-12-22 09:44:10,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:44:10,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:44:10,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 45 conjunts are in the unsatisfiable core [2020-12-22 09:44:10,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:44:11,235 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-22 09:44:22,619 WARN L197 SmtUtils]: Spent 10.34 s on a formula simplification. DAG size of input: 413 DAG size of output: 104 [2020-12-22 09:44:23,455 WARN L197 SmtUtils]: Spent 598.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2020-12-22 09:44:24,650 WARN L197 SmtUtils]: Spent 989.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-12-22 09:44:25,959 WARN L197 SmtUtils]: Spent 1.04 s on a formula simplification that was a NOOP. DAG size: 112 [2020-12-22 09:44:29,002 WARN L197 SmtUtils]: Spent 2.80 s on a formula simplification. DAG size of input: 120 DAG size of output: 113 [2020-12-22 09:44:29,079 INFO L639 QuantifierPusher]: Distributing 8 conjuncts over 2 disjuncts [2020-12-22 09:44:34,202 WARN L197 SmtUtils]: Spent 4.39 s on a formula simplification. DAG size of input: 294 DAG size of output: 113 [2020-12-22 09:44:34,431 INFO L639 QuantifierPusher]: Distributing 8 conjuncts over 2 disjuncts [2020-12-22 09:44:41,781 WARN L197 SmtUtils]: Spent 6.39 s on a formula simplification. DAG size of input: 274 DAG size of output: 113 [2020-12-22 09:44:41,819 INFO L639 QuantifierPusher]: Distributing 8 conjuncts over 2 disjuncts [2020-12-22 09:44:41,878 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:44:41,918 INFO L639 QuantifierPusher]: Distributing 8 conjuncts over 3 disjuncts [2020-12-22 09:44:41,923 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: variable got div captured [2020-12-22 09:44:41,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 09:44:41,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-12-22 09:44:41,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814606839] [2020-12-22 09:44:41,924 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 09:44:41,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:44:41,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 09:44:41,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1086, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 09:44:41,926 INFO L87 Difference]: Start difference. First operand 13125 states and 17365 transitions. Second operand 13 states. [2020-12-22 09:44:42,588 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2020-12-22 09:44:42,928 WARN L197 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 38 [2020-12-22 09:44:43,202 WARN L197 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2020-12-22 09:44:43,479 WARN L197 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2020-12-22 09:44:43,990 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2020-12-22 09:44:44,328 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 26 [2020-12-22 09:44:45,020 WARN L197 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43 [2020-12-22 09:44:45,343 WARN L197 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2020-12-22 09:44:45,733 WARN L197 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 41 [2020-12-22 09:44:46,051 WARN L197 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2020-12-22 09:44:47,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:44:47,725 INFO L93 Difference]: Finished difference Result 22249 states and 28792 transitions. [2020-12-22 09:44:47,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 09:44:47,726 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 83 [2020-12-22 09:44:47,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:44:47,747 INFO L225 Difference]: With dead ends: 22249 [2020-12-22 09:44:47,747 INFO L226 Difference]: Without dead ends: 18089 [2020-12-22 09:44:47,757 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 34.3s TimeCoverageRelationStatistics Valid=292, Invalid=2258, Unknown=0, NotChecked=0, Total=2550 [2020-12-22 09:44:47,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18089 states. [2020-12-22 09:44:49,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18089 to 12599. [2020-12-22 09:44:49,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12599 states. [2020-12-22 09:44:49,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12599 states to 12599 states and 16645 transitions. [2020-12-22 09:44:49,118 INFO L78 Accepts]: Start accepts. Automaton has 12599 states and 16645 transitions. Word has length 83 [2020-12-22 09:44:49,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:44:49,118 INFO L481 AbstractCegarLoop]: Abstraction has 12599 states and 16645 transitions. [2020-12-22 09:44:49,118 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 09:44:49,118 INFO L276 IsEmpty]: Start isEmpty. Operand 12599 states and 16645 transitions. [2020-12-22 09:44:49,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 09:44:49,119 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:44:49,119 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:44:49,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-22 09:44:49,333 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:44:49,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:44:49,334 INFO L82 PathProgramCache]: Analyzing trace with hash -852701794, now seen corresponding path program 1 times [2020-12-22 09:44:49,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:44:49,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790679489] [2020-12-22 09:44:49,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:44:49,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:44:49,876 WARN L197 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2020-12-22 09:44:50,266 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:44:50,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790679489] [2020-12-22 09:44:50,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298752465] [2020-12-22 09:44:50,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:44:50,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:44:50,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 09:44:50,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:44:51,116 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:44:51,467 WARN L197 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 40 [2020-12-22 09:44:52,175 WARN L197 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2020-12-22 09:44:52,263 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:44:52,264 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:44:52,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2020-12-22 09:44:52,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116634723] [2020-12-22 09:44:52,264 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-22 09:44:52,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:44:52,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-22 09:44:52,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2020-12-22 09:44:52,265 INFO L87 Difference]: Start difference. First operand 12599 states and 16645 transitions. Second operand 24 states. [2020-12-22 09:44:52,996 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 24 [2020-12-22 09:44:53,315 WARN L197 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 40 [2020-12-22 09:44:53,723 WARN L197 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 61 [2020-12-22 09:44:54,161 WARN L197 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 61 [2020-12-22 09:44:54,541 WARN L197 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2020-12-22 09:44:55,176 WARN L197 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 56 [2020-12-22 09:44:55,713 WARN L197 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 48 [2020-12-22 09:44:56,180 WARN L197 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 54 [2020-12-22 09:44:57,289 WARN L197 SmtUtils]: Spent 493.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 69 [2020-12-22 09:44:57,957 WARN L197 SmtUtils]: Spent 515.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 63 [2020-12-22 09:44:58,947 WARN L197 SmtUtils]: Spent 846.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 87 [2020-12-22 09:44:59,950 WARN L197 SmtUtils]: Spent 771.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 82 [2020-12-22 09:45:00,420 WARN L197 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 59 [2020-12-22 09:45:01,083 WARN L197 SmtUtils]: Spent 491.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 59 [2020-12-22 09:45:01,769 WARN L197 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2020-12-22 09:45:02,251 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-12-22 09:45:02,784 WARN L197 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2020-12-22 09:45:04,951 WARN L197 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 61 [2020-12-22 09:45:05,863 WARN L197 SmtUtils]: Spent 715.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 80 [2020-12-22 09:45:07,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:45:07,897 INFO L93 Difference]: Finished difference Result 37514 states and 47317 transitions. [2020-12-22 09:45:07,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-22 09:45:07,899 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 83 [2020-12-22 09:45:07,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:45:07,934 INFO L225 Difference]: With dead ends: 37514 [2020-12-22 09:45:07,934 INFO L226 Difference]: Without dead ends: 33335 [2020-12-22 09:45:07,942 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 610 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=555, Invalid=2307, Unknown=0, NotChecked=0, Total=2862 [2020-12-22 09:45:07,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33335 states. [2020-12-22 09:45:10,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33335 to 18779. [2020-12-22 09:45:10,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18779 states. [2020-12-22 09:45:10,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18779 states to 18779 states and 24297 transitions. [2020-12-22 09:45:10,296 INFO L78 Accepts]: Start accepts. Automaton has 18779 states and 24297 transitions. Word has length 83 [2020-12-22 09:45:10,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:45:10,296 INFO L481 AbstractCegarLoop]: Abstraction has 18779 states and 24297 transitions. [2020-12-22 09:45:10,296 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-22 09:45:10,296 INFO L276 IsEmpty]: Start isEmpty. Operand 18779 states and 24297 transitions. [2020-12-22 09:45:10,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 09:45:10,298 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:10,298 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:45:10,508 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:45:10,509 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:10,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:10,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1008179547, now seen corresponding path program 1 times [2020-12-22 09:45:10,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:10,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691347396] [2020-12-22 09:45:10,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:10,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat