/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.5.1.ufo.BOUNDED-10.pals+Problem12_label01.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 09:50:56,290 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 09:50:56,293 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 09:50:56,327 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 09:50:56,328 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 09:50:56,329 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 09:50:56,331 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 09:50:56,333 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 09:50:56,335 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 09:50:56,337 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 09:50:56,338 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 09:50:56,339 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 09:50:56,340 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 09:50:56,341 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 09:50:56,342 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 09:50:56,343 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 09:50:56,344 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 09:50:56,345 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 09:50:56,354 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 09:50:56,357 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 09:50:56,358 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 09:50:56,360 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 09:50:56,361 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 09:50:56,362 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 09:50:56,371 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 09:50:56,378 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 09:50:56,379 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 09:50:56,379 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 09:50:56,380 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 09:50:56,383 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 09:50:56,383 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 09:50:56,384 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 09:50:56,384 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 09:50:56,384 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 09:50:56,385 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 09:50:56,386 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 09:50:56,387 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 09:50:56,441 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 09:50:56,442 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 09:50:56,444 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 09:50:56,444 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 09:50:56,445 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 09:50:56,446 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 09:50:56,446 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 09:50:56,446 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 09:50:56,446 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 09:50:56,446 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 09:50:56,448 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 09:50:56,448 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 09:50:56,448 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 09:50:56,448 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 09:50:56,448 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 09:50:56,449 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 09:50:56,449 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 09:50:56,449 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:50:56,449 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 09:50:56,449 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 09:50:56,450 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 09:50:56,450 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 09:50:56,450 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 09:50:56,450 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 09:50:56,450 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 09:50:56,450 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 09:50:56,860 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 09:50:56,883 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 09:50:56,886 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 09:50:56,888 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 09:50:56,888 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 09:50:56,889 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.5.1.ufo.BOUNDED-10.pals+Problem12_label01.c [2020-12-22 09:50:56,962 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/954f47dba/e7c3299d87f84fcc89fb1ff7c7b17d80/FLAG1f5d0d78a [2020-12-22 09:50:57,924 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 09:50:57,924 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.5.1.ufo.BOUNDED-10.pals+Problem12_label01.c [2020-12-22 09:50:57,966 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/954f47dba/e7c3299d87f84fcc89fb1ff7c7b17d80/FLAG1f5d0d78a [2020-12-22 09:50:58,427 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/954f47dba/e7c3299d87f84fcc89fb1ff7c7b17d80 [2020-12-22 09:50:58,430 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 09:50:58,434 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 09:50:58,438 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 09:50:58,438 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 09:50:58,442 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 09:50:58,444 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:50:58" (1/1) ... [2020-12-22 09:50:58,446 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b71ba32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:50:58, skipping insertion in model container [2020-12-22 09:50:58,446 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:50:58" (1/1) ... [2020-12-22 09:50:58,455 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 09:50:58,642 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 09:50:59,028 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.5.1.ufo.BOUNDED-10.pals+Problem12_label01.c[11767,11780] [2020-12-22 09:50:59,127 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.5.1.ufo.BOUNDED-10.pals+Problem12_label01.c[17079,17092] [2020-12-22 09:51:00,301 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:51:00,316 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 09:51:00,395 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.5.1.ufo.BOUNDED-10.pals+Problem12_label01.c[11767,11780] [2020-12-22 09:51:00,411 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.5.1.ufo.BOUNDED-10.pals+Problem12_label01.c[17079,17092] [2020-12-22 09:51:01,117 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:51:01,161 INFO L208 MainTranslator]: Completed translation [2020-12-22 09:51:01,162 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:51:01 WrapperNode [2020-12-22 09:51:01,163 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 09:51:01,164 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 09:51:01,164 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 09:51:01,167 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 09:51:01,176 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:51:01" (1/1) ... [2020-12-22 09:51:01,245 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:51:01" (1/1) ... [2020-12-22 09:51:01,647 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 09:51:01,648 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 09:51:01,648 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 09:51:01,648 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 09:51:01,658 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:51:01" (1/1) ... [2020-12-22 09:51:01,659 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:51:01" (1/1) ... [2020-12-22 09:51:01,715 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:51:01" (1/1) ... [2020-12-22 09:51:01,716 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:51:01" (1/1) ... [2020-12-22 09:51:02,203 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:51:01" (1/1) ... [2020-12-22 09:51:02,270 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:51:01" (1/1) ... [2020-12-22 09:51:02,441 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:51:01" (1/1) ... [2020-12-22 09:51:02,584 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 09:51:02,586 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 09:51:02,586 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 09:51:02,587 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 09:51:02,588 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:51:01" (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 09:51:02,726 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 09:51:02,727 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 09:51:02,727 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 09:51:02,727 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 09:51:08,711 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 09:51:08,711 INFO L299 CfgBuilder]: Removed 36 assume(true) statements. [2020-12-22 09:51:08,715 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:51:08 BoogieIcfgContainer [2020-12-22 09:51:08,715 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 09:51:08,718 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 09:51:08,718 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 09:51:08,722 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 09:51:08,722 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:50:58" (1/3) ... [2020-12-22 09:51:08,723 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c52dfe2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:51:08, skipping insertion in model container [2020-12-22 09:51:08,723 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:51:01" (2/3) ... [2020-12-22 09:51:08,724 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c52dfe2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:51:08, skipping insertion in model container [2020-12-22 09:51:08,724 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:51:08" (3/3) ... [2020-12-22 09:51:08,725 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.5.1.ufo.BOUNDED-10.pals+Problem12_label01.c [2020-12-22 09:51:08,732 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 09:51:08,738 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 09:51:08,757 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 09:51:08,789 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 09:51:08,790 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 09:51:08,790 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 09:51:08,790 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 09:51:08,790 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 09:51:08,790 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 09:51:08,790 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 09:51:08,791 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 09:51:08,823 INFO L276 IsEmpty]: Start isEmpty. Operand 909 states. [2020-12-22 09:51:08,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 09:51:08,833 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:51:08,833 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] [2020-12-22 09:51:08,834 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:51:08,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:51:08,840 INFO L82 PathProgramCache]: Analyzing trace with hash -441366565, now seen corresponding path program 1 times [2020-12-22 09:51:08,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:51:08,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120147209] [2020-12-22 09:51:08,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:51:08,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:51:09,142 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 09:51:09,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120147209] [2020-12-22 09:51:09,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:51:09,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:51:09,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086379088] [2020-12-22 09:51:09,150 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 09:51:09,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:51:09,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 09:51:09,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 09:51:09,172 INFO L87 Difference]: Start difference. First operand 909 states. Second operand 2 states. [2020-12-22 09:51:09,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:51:09,268 INFO L93 Difference]: Finished difference Result 1781 states and 3374 transitions. [2020-12-22 09:51:09,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 09:51:09,270 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 34 [2020-12-22 09:51:09,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:51:09,311 INFO L225 Difference]: With dead ends: 1781 [2020-12-22 09:51:09,312 INFO L226 Difference]: Without dead ends: 843 [2020-12-22 09:51:09,325 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 09:51:09,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 843 states. [2020-12-22 09:51:09,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 843 to 843. [2020-12-22 09:51:09,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 843 states. [2020-12-22 09:51:09,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 843 states to 843 states and 1589 transitions. [2020-12-22 09:51:09,417 INFO L78 Accepts]: Start accepts. Automaton has 843 states and 1589 transitions. Word has length 34 [2020-12-22 09:51:09,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:51:09,417 INFO L481 AbstractCegarLoop]: Abstraction has 843 states and 1589 transitions. [2020-12-22 09:51:09,417 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 09:51:09,418 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states and 1589 transitions. [2020-12-22 09:51:09,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 09:51:09,420 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:51:09,420 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] [2020-12-22 09:51:09,420 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 09:51:09,420 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:51:09,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:51:09,421 INFO L82 PathProgramCache]: Analyzing trace with hash -950839655, now seen corresponding path program 1 times [2020-12-22 09:51:09,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:51:09,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232555722] [2020-12-22 09:51:09,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:51:09,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:51:09,622 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 09:51:09,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232555722] [2020-12-22 09:51:09,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:51:09,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:51:09,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101409392] [2020-12-22 09:51:09,625 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:51:09,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:51:09,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:51:09,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:51:09,626 INFO L87 Difference]: Start difference. First operand 843 states and 1589 transitions. Second operand 5 states. [2020-12-22 09:51:09,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:51:09,786 INFO L93 Difference]: Finished difference Result 899 states and 1675 transitions. [2020-12-22 09:51:09,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:51:09,787 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-12-22 09:51:09,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:51:09,793 INFO L225 Difference]: With dead ends: 899 [2020-12-22 09:51:09,794 INFO L226 Difference]: Without dead ends: 843 [2020-12-22 09:51:09,795 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 09:51:09,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 843 states. [2020-12-22 09:51:09,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 843 to 843. [2020-12-22 09:51:09,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 843 states. [2020-12-22 09:51:09,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 843 states to 843 states and 1558 transitions. [2020-12-22 09:51:09,819 INFO L78 Accepts]: Start accepts. Automaton has 843 states and 1558 transitions. Word has length 34 [2020-12-22 09:51:09,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:51:09,820 INFO L481 AbstractCegarLoop]: Abstraction has 843 states and 1558 transitions. [2020-12-22 09:51:09,820 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:51:09,820 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states and 1558 transitions. [2020-12-22 09:51:09,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-22 09:51:09,822 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:51:09,822 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] [2020-12-22 09:51:09,822 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 09:51:09,823 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:51:09,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:51:09,823 INFO L82 PathProgramCache]: Analyzing trace with hash 694349877, now seen corresponding path program 1 times [2020-12-22 09:51:09,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:51:09,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702634518] [2020-12-22 09:51:09,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:51:09,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:51:10,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:51:10,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702634518] [2020-12-22 09:51:10,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:51:10,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:51:10,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804292685] [2020-12-22 09:51:10,045 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:51:10,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:51:10,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:51:10,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:51:10,052 INFO L87 Difference]: Start difference. First operand 843 states and 1558 transitions. Second operand 4 states. [2020-12-22 09:51:20,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:51:20,847 INFO L93 Difference]: Finished difference Result 3098 states and 5867 transitions. [2020-12-22 09:51:20,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:51:20,848 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 48 [2020-12-22 09:51:20,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:51:20,862 INFO L225 Difference]: With dead ends: 3098 [2020-12-22 09:51:20,862 INFO L226 Difference]: Without dead ends: 2345 [2020-12-22 09:51:20,864 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 09:51:20,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2345 states. [2020-12-22 09:51:20,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2345 to 2345. [2020-12-22 09:51:20,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2345 states. [2020-12-22 09:51:20,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2345 states to 2345 states and 3672 transitions. [2020-12-22 09:51:20,923 INFO L78 Accepts]: Start accepts. Automaton has 2345 states and 3672 transitions. Word has length 48 [2020-12-22 09:51:20,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:51:20,923 INFO L481 AbstractCegarLoop]: Abstraction has 2345 states and 3672 transitions. [2020-12-22 09:51:20,924 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:51:20,924 INFO L276 IsEmpty]: Start isEmpty. Operand 2345 states and 3672 transitions. [2020-12-22 09:51:20,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:51:20,926 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:51:20,926 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:51:20,926 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 09:51:20,926 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:51:20,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:51:20,927 INFO L82 PathProgramCache]: Analyzing trace with hash -695028240, now seen corresponding path program 1 times [2020-12-22 09:51:20,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:51:20,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350668087] [2020-12-22 09:51:20,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:51:20,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:51:21,029 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 09:51:21,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350668087] [2020-12-22 09:51:21,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:51:21,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:51:21,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439276193] [2020-12-22 09:51:21,031 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:51:21,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:51:21,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:51:21,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:51:21,032 INFO L87 Difference]: Start difference. First operand 2345 states and 3672 transitions. Second operand 3 states. [2020-12-22 09:51:21,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:51:21,078 INFO L93 Difference]: Finished difference Result 2443 states and 3826 transitions. [2020-12-22 09:51:21,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:51:21,078 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 09:51:21,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:51:21,091 INFO L225 Difference]: With dead ends: 2443 [2020-12-22 09:51:21,091 INFO L226 Difference]: Without dead ends: 2391 [2020-12-22 09:51:21,092 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 09:51:21,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2391 states. [2020-12-22 09:51:21,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2391 to 2389. [2020-12-22 09:51:21,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2389 states. [2020-12-22 09:51:21,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2389 states to 2389 states and 3742 transitions. [2020-12-22 09:51:21,151 INFO L78 Accepts]: Start accepts. Automaton has 2389 states and 3742 transitions. Word has length 64 [2020-12-22 09:51:21,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:51:21,153 INFO L481 AbstractCegarLoop]: Abstraction has 2389 states and 3742 transitions. [2020-12-22 09:51:21,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:51:21,154 INFO L276 IsEmpty]: Start isEmpty. Operand 2389 states and 3742 transitions. [2020-12-22 09:51:21,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:51:21,157 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:51:21,158 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:51:21,158 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 09:51:21,158 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:51:21,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:51:21,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1440610970, now seen corresponding path program 1 times [2020-12-22 09:51:21,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:51:21,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838449000] [2020-12-22 09:51:21,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:51:21,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:51:21,278 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 09:51:21,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838449000] [2020-12-22 09:51:21,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:51:21,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:51:21,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672530219] [2020-12-22 09:51:21,281 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:51:21,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:51:21,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:51:21,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:51:21,282 INFO L87 Difference]: Start difference. First operand 2389 states and 3742 transitions. Second operand 3 states. [2020-12-22 09:51:21,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:51:21,329 INFO L93 Difference]: Finished difference Result 2569 states and 4026 transitions. [2020-12-22 09:51:21,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:51:21,330 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 09:51:21,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:51:21,342 INFO L225 Difference]: With dead ends: 2569 [2020-12-22 09:51:21,342 INFO L226 Difference]: Without dead ends: 2473 [2020-12-22 09:51:21,344 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 09:51:21,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2473 states. [2020-12-22 09:51:21,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2473 to 2471. [2020-12-22 09:51:21,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2471 states. [2020-12-22 09:51:21,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2471 states to 2471 states and 3871 transitions. [2020-12-22 09:51:21,406 INFO L78 Accepts]: Start accepts. Automaton has 2471 states and 3871 transitions. Word has length 64 [2020-12-22 09:51:21,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:51:21,407 INFO L481 AbstractCegarLoop]: Abstraction has 2471 states and 3871 transitions. [2020-12-22 09:51:21,407 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:51:21,408 INFO L276 IsEmpty]: Start isEmpty. Operand 2471 states and 3871 transitions. [2020-12-22 09:51:21,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:51:21,409 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:51:21,410 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:51:21,410 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 09:51:21,410 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:51:21,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:51:21,411 INFO L82 PathProgramCache]: Analyzing trace with hash 914325468, now seen corresponding path program 1 times [2020-12-22 09:51:21,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:51:21,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573261905] [2020-12-22 09:51:21,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:51:21,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:51:21,497 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 09:51:21,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573261905] [2020-12-22 09:51:21,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:51:21,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:51:21,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848769941] [2020-12-22 09:51:21,500 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:51:21,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:51:21,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:51:21,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:51:21,502 INFO L87 Difference]: Start difference. First operand 2471 states and 3871 transitions. Second operand 3 states. [2020-12-22 09:51:21,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:51:21,569 INFO L93 Difference]: Finished difference Result 2803 states and 4393 transitions. [2020-12-22 09:51:21,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:51:21,570 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 09:51:21,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:51:21,588 INFO L225 Difference]: With dead ends: 2803 [2020-12-22 09:51:21,589 INFO L226 Difference]: Without dead ends: 2625 [2020-12-22 09:51:21,590 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 09:51:21,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2625 states. [2020-12-22 09:51:21,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2625 to 2623. [2020-12-22 09:51:21,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2623 states. [2020-12-22 09:51:21,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2623 states to 2623 states and 4107 transitions. [2020-12-22 09:51:21,669 INFO L78 Accepts]: Start accepts. Automaton has 2623 states and 4107 transitions. Word has length 64 [2020-12-22 09:51:21,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:51:21,669 INFO L481 AbstractCegarLoop]: Abstraction has 2623 states and 4107 transitions. [2020-12-22 09:51:21,669 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:51:21,669 INFO L276 IsEmpty]: Start isEmpty. Operand 2623 states and 4107 transitions. [2020-12-22 09:51:21,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:51:21,671 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:51:21,671 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:51:21,671 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 09:51:21,672 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:51:21,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:51:21,675 INFO L82 PathProgramCache]: Analyzing trace with hash -1701027568, now seen corresponding path program 1 times [2020-12-22 09:51:21,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:51:21,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585802326] [2020-12-22 09:51:21,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:51:21,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:51:21,753 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 09:51:21,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585802326] [2020-12-22 09:51:21,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:51:21,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:51:21,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448741179] [2020-12-22 09:51:21,755 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:51:21,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:51:21,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:51:21,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:51:21,756 INFO L87 Difference]: Start difference. First operand 2623 states and 4107 transitions. Second operand 3 states. [2020-12-22 09:51:21,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:51:21,819 INFO L93 Difference]: Finished difference Result 3235 states and 5061 transitions. [2020-12-22 09:51:21,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:51:21,820 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 09:51:21,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:51:21,835 INFO L225 Difference]: With dead ends: 3235 [2020-12-22 09:51:21,835 INFO L226 Difference]: Without dead ends: 2905 [2020-12-22 09:51:21,838 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 09:51:21,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2905 states. [2020-12-22 09:51:21,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2905 to 2903. [2020-12-22 09:51:21,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2903 states. [2020-12-22 09:51:21,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2903 states to 2903 states and 4535 transitions. [2020-12-22 09:51:21,923 INFO L78 Accepts]: Start accepts. Automaton has 2903 states and 4535 transitions. Word has length 64 [2020-12-22 09:51:21,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:51:21,924 INFO L481 AbstractCegarLoop]: Abstraction has 2903 states and 4535 transitions. [2020-12-22 09:51:21,924 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:51:21,924 INFO L276 IsEmpty]: Start isEmpty. Operand 2903 states and 4535 transitions. [2020-12-22 09:51:21,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:51:21,925 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:51:21,925 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:51:21,925 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 09:51:21,925 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:51:21,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:51:21,926 INFO L82 PathProgramCache]: Analyzing trace with hash -1105068988, now seen corresponding path program 1 times [2020-12-22 09:51:21,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:51:21,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144463537] [2020-12-22 09:51:21,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:51:21,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:51:22,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:51:22,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144463537] [2020-12-22 09:51:22,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:51:22,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:51:22,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4477677] [2020-12-22 09:51:22,005 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:51:22,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:51:22,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:51:22,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:51:22,006 INFO L87 Difference]: Start difference. First operand 2903 states and 4535 transitions. Second operand 3 states. [2020-12-22 09:51:22,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:51:22,138 INFO L93 Difference]: Finished difference Result 4027 states and 6265 transitions. [2020-12-22 09:51:22,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:51:22,139 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 09:51:22,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:51:22,157 INFO L225 Difference]: With dead ends: 4027 [2020-12-22 09:51:22,157 INFO L226 Difference]: Without dead ends: 3417 [2020-12-22 09:51:22,160 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 09:51:22,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3417 states. [2020-12-22 09:51:22,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3417 to 3415. [2020-12-22 09:51:22,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3415 states. [2020-12-22 09:51:22,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3415 states to 3415 states and 5303 transitions. [2020-12-22 09:51:22,268 INFO L78 Accepts]: Start accepts. Automaton has 3415 states and 5303 transitions. Word has length 64 [2020-12-22 09:51:22,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:51:22,269 INFO L481 AbstractCegarLoop]: Abstraction has 3415 states and 5303 transitions. [2020-12-22 09:51:22,269 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:51:22,269 INFO L276 IsEmpty]: Start isEmpty. Operand 3415 states and 5303 transitions. [2020-12-22 09:51:22,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:51:22,270 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:51:22,270 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:51:22,270 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 09:51:22,270 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:51:22,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:51:22,271 INFO L82 PathProgramCache]: Analyzing trace with hash 112916410, now seen corresponding path program 1 times [2020-12-22 09:51:22,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:51:22,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024667231] [2020-12-22 09:51:22,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:51:22,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:51:22,384 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 09:51:22,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024667231] [2020-12-22 09:51:22,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:51:22,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:51:22,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654686627] [2020-12-22 09:51:22,387 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:51:22,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:51:22,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:51:22,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:51:22,388 INFO L87 Difference]: Start difference. First operand 3415 states and 5303 transitions. Second operand 7 states. [2020-12-22 09:51:23,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:51:23,151 INFO L93 Difference]: Finished difference Result 14635 states and 22433 transitions. [2020-12-22 09:51:23,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 09:51:23,152 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 64 [2020-12-22 09:51:23,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:51:23,227 INFO L225 Difference]: With dead ends: 14635 [2020-12-22 09:51:23,227 INFO L226 Difference]: Without dead ends: 13513 [2020-12-22 09:51:23,236 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-12-22 09:51:23,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13513 states. [2020-12-22 09:51:23,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13513 to 4535. [2020-12-22 09:51:23,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4535 states. [2020-12-22 09:51:23,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4535 states to 4535 states and 6951 transitions. [2020-12-22 09:51:23,559 INFO L78 Accepts]: Start accepts. Automaton has 4535 states and 6951 transitions. Word has length 64 [2020-12-22 09:51:23,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:51:23,564 INFO L481 AbstractCegarLoop]: Abstraction has 4535 states and 6951 transitions. [2020-12-22 09:51:23,564 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:51:23,565 INFO L276 IsEmpty]: Start isEmpty. Operand 4535 states and 6951 transitions. [2020-12-22 09:51:23,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:51:23,571 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:51:23,572 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:51:23,572 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 09:51:23,572 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:51:23,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:51:23,573 INFO L82 PathProgramCache]: Analyzing trace with hash -277208054, now seen corresponding path program 1 times [2020-12-22 09:51:23,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:51:23,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322276649] [2020-12-22 09:51:23,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:51:23,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:51:23,634 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 09:51:23,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322276649] [2020-12-22 09:51:23,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:51:23,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:51:23,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188239356] [2020-12-22 09:51:23,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:51:23,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:51:23,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:51:23,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:51:23,640 INFO L87 Difference]: Start difference. First operand 4535 states and 6951 transitions. Second operand 3 states. [2020-12-22 09:51:23,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:51:23,974 INFO L93 Difference]: Finished difference Result 7821 states and 11867 transitions. [2020-12-22 09:51:23,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:51:23,975 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 09:51:23,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:51:23,989 INFO L225 Difference]: With dead ends: 7821 [2020-12-22 09:51:23,990 INFO L226 Difference]: Without dead ends: 5579 [2020-12-22 09:51:23,996 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 09:51:24,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5579 states. [2020-12-22 09:51:24,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5579 to 5577. [2020-12-22 09:51:24,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5577 states. [2020-12-22 09:51:24,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5577 states to 5577 states and 8457 transitions. [2020-12-22 09:51:24,330 INFO L78 Accepts]: Start accepts. Automaton has 5577 states and 8457 transitions. Word has length 66 [2020-12-22 09:51:24,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:51:24,330 INFO L481 AbstractCegarLoop]: Abstraction has 5577 states and 8457 transitions. [2020-12-22 09:51:24,330 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:51:24,331 INFO L276 IsEmpty]: Start isEmpty. Operand 5577 states and 8457 transitions. [2020-12-22 09:51:24,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:51:24,331 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:51:24,332 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:51:24,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 09:51:24,332 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:51:24,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:51:24,333 INFO L82 PathProgramCache]: Analyzing trace with hash -210714542, now seen corresponding path program 1 times [2020-12-22 09:51:24,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:51:24,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059344053] [2020-12-22 09:51:24,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:51:24,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:51:24,573 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 09:51:24,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059344053] [2020-12-22 09:51:24,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:51:24,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:51:24,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630987365] [2020-12-22 09:51:24,575 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:51:24,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:51:24,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:51:24,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:51:24,578 INFO L87 Difference]: Start difference. First operand 5577 states and 8457 transitions. Second operand 7 states. [2020-12-22 09:51:25,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:51:25,051 INFO L93 Difference]: Finished difference Result 8861 states and 13323 transitions. [2020-12-22 09:51:25,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:51:25,052 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 66 [2020-12-22 09:51:25,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:51:25,064 INFO L225 Difference]: With dead ends: 8861 [2020-12-22 09:51:25,065 INFO L226 Difference]: Without dead ends: 5579 [2020-12-22 09:51:25,071 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-12-22 09:51:25,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5579 states. [2020-12-22 09:51:25,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5579 to 5577. [2020-12-22 09:51:25,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5577 states. [2020-12-22 09:51:25,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5577 states to 5577 states and 8409 transitions. [2020-12-22 09:51:25,365 INFO L78 Accepts]: Start accepts. Automaton has 5577 states and 8409 transitions. Word has length 66 [2020-12-22 09:51:25,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:51:25,365 INFO L481 AbstractCegarLoop]: Abstraction has 5577 states and 8409 transitions. [2020-12-22 09:51:25,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:51:25,365 INFO L276 IsEmpty]: Start isEmpty. Operand 5577 states and 8409 transitions. [2020-12-22 09:51:25,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:51:25,366 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:51:25,366 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:51:25,367 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 09:51:25,367 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:51:25,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:51:25,367 INFO L82 PathProgramCache]: Analyzing trace with hash 1643060746, now seen corresponding path program 1 times [2020-12-22 09:51:25,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:51:25,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134319989] [2020-12-22 09:51:25,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:51:25,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:51:25,498 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 09:51:25,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134319989] [2020-12-22 09:51:25,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:51:25,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:51:25,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426932301] [2020-12-22 09:51:25,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:51:25,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:51:25,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:51:25,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:51:25,500 INFO L87 Difference]: Start difference. First operand 5577 states and 8409 transitions. Second operand 6 states. [2020-12-22 09:51:25,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:51:25,949 INFO L93 Difference]: Finished difference Result 8859 states and 13226 transitions. [2020-12-22 09:51:25,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:51:25,950 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-12-22 09:51:25,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:51:25,961 INFO L225 Difference]: With dead ends: 8859 [2020-12-22 09:51:25,961 INFO L226 Difference]: Without dead ends: 5577 [2020-12-22 09:51:25,966 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 09:51:25,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5577 states. [2020-12-22 09:51:26,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5577 to 5577. [2020-12-22 09:51:26,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5577 states. [2020-12-22 09:51:26,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5577 states to 5577 states and 8361 transitions. [2020-12-22 09:51:26,250 INFO L78 Accepts]: Start accepts. Automaton has 5577 states and 8361 transitions. Word has length 67 [2020-12-22 09:51:26,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:51:26,250 INFO L481 AbstractCegarLoop]: Abstraction has 5577 states and 8361 transitions. [2020-12-22 09:51:26,251 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:51:26,251 INFO L276 IsEmpty]: Start isEmpty. Operand 5577 states and 8361 transitions. [2020-12-22 09:51:26,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:51:26,251 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:51:26,252 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:51:26,252 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 09:51:26,252 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:51:26,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:51:26,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1372042872, now seen corresponding path program 1 times [2020-12-22 09:51:26,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:51:26,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199826412] [2020-12-22 09:51:26,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:51:26,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:51:26,340 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 09:51:26,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199826412] [2020-12-22 09:51:26,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:51:26,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:51:26,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429096583] [2020-12-22 09:51:26,341 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:51:26,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:51:26,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:51:26,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:51:26,347 INFO L87 Difference]: Start difference. First operand 5577 states and 8361 transitions. Second operand 6 states. [2020-12-22 09:51:26,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:51:26,710 INFO L93 Difference]: Finished difference Result 8859 states and 13130 transitions. [2020-12-22 09:51:26,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:51:26,711 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-12-22 09:51:26,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:51:26,723 INFO L225 Difference]: With dead ends: 8859 [2020-12-22 09:51:26,723 INFO L226 Difference]: Without dead ends: 5577 [2020-12-22 09:51:26,730 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 09:51:26,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5577 states. [2020-12-22 09:51:27,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5577 to 5577. [2020-12-22 09:51:27,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5577 states. [2020-12-22 09:51:27,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5577 states to 5577 states and 8313 transitions. [2020-12-22 09:51:27,033 INFO L78 Accepts]: Start accepts. Automaton has 5577 states and 8313 transitions. Word has length 67 [2020-12-22 09:51:27,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:51:27,033 INFO L481 AbstractCegarLoop]: Abstraction has 5577 states and 8313 transitions. [2020-12-22 09:51:27,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:51:27,033 INFO L276 IsEmpty]: Start isEmpty. Operand 5577 states and 8313 transitions. [2020-12-22 09:51:27,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:51:27,034 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:51:27,035 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:51:27,035 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 09:51:27,035 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:51:27,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:51:27,036 INFO L82 PathProgramCache]: Analyzing trace with hash 316900870, now seen corresponding path program 1 times [2020-12-22 09:51:27,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:51:27,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137186312] [2020-12-22 09:51:27,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:51:27,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:51:27,132 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 09:51:27,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137186312] [2020-12-22 09:51:27,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:51:27,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:51:27,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125994312] [2020-12-22 09:51:27,134 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:51:27,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:51:27,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:51:27,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:51:27,135 INFO L87 Difference]: Start difference. First operand 5577 states and 8313 transitions. Second operand 5 states. [2020-12-22 09:51:27,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:51:27,776 INFO L93 Difference]: Finished difference Result 8420 states and 12287 transitions. [2020-12-22 09:51:27,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:51:27,777 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 67 [2020-12-22 09:51:27,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:51:27,794 INFO L225 Difference]: With dead ends: 8420 [2020-12-22 09:51:27,794 INFO L226 Difference]: Without dead ends: 8418 [2020-12-22 09:51:27,798 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 09:51:27,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8418 states. [2020-12-22 09:51:28,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8418 to 5769. [2020-12-22 09:51:28,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5769 states. [2020-12-22 09:51:28,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5769 states to 5769 states and 8489 transitions. [2020-12-22 09:51:28,158 INFO L78 Accepts]: Start accepts. Automaton has 5769 states and 8489 transitions. Word has length 67 [2020-12-22 09:51:28,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:51:28,159 INFO L481 AbstractCegarLoop]: Abstraction has 5769 states and 8489 transitions. [2020-12-22 09:51:28,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:51:28,159 INFO L276 IsEmpty]: Start isEmpty. Operand 5769 states and 8489 transitions. [2020-12-22 09:51:28,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 09:51:28,162 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:51:28,163 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:51:28,163 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 09:51:28,163 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:51:28,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:51:28,164 INFO L82 PathProgramCache]: Analyzing trace with hash -1065285143, now seen corresponding path program 1 times [2020-12-22 09:51:28,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:51:28,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821297799] [2020-12-22 09:51:28,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:51:28,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:51:28,281 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 09:51:28,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821297799] [2020-12-22 09:51:28,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:51:28,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:51:28,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165694414] [2020-12-22 09:51:28,282 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:51:28,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:51:28,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:51:28,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:51:28,283 INFO L87 Difference]: Start difference. First operand 5769 states and 8489 transitions. Second operand 7 states. [2020-12-22 09:51:29,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:51:29,824 INFO L93 Difference]: Finished difference Result 23845 states and 33919 transitions. [2020-12-22 09:51:29,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:51:29,825 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 95 [2020-12-22 09:51:29,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:51:29,871 INFO L225 Difference]: With dead ends: 23845 [2020-12-22 09:51:29,872 INFO L226 Difference]: Without dead ends: 20371 [2020-12-22 09:51:29,886 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:51:29,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20371 states. [2020-12-22 09:51:30,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20371 to 9241. [2020-12-22 09:51:30,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9241 states. [2020-12-22 09:51:30,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9241 states to 9241 states and 13337 transitions. [2020-12-22 09:51:30,723 INFO L78 Accepts]: Start accepts. Automaton has 9241 states and 13337 transitions. Word has length 95 [2020-12-22 09:51:30,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:51:30,723 INFO L481 AbstractCegarLoop]: Abstraction has 9241 states and 13337 transitions. [2020-12-22 09:51:30,724 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:51:30,724 INFO L276 IsEmpty]: Start isEmpty. Operand 9241 states and 13337 transitions. [2020-12-22 09:51:30,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 09:51:30,728 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:51:30,729 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:51:30,729 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 09:51:30,729 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:51:30,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:51:30,730 INFO L82 PathProgramCache]: Analyzing trace with hash 1460899337, now seen corresponding path program 1 times [2020-12-22 09:51:30,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:51:30,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615066748] [2020-12-22 09:51:30,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:51:30,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:51:30,865 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 09:51:30,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615066748] [2020-12-22 09:51:30,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:51:30,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:51:30,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968105394] [2020-12-22 09:51:30,869 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:51:30,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:51:30,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:51:30,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:51:30,870 INFO L87 Difference]: Start difference. First operand 9241 states and 13337 transitions. Second operand 7 states. [2020-12-22 09:51:32,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:51:32,379 INFO L93 Difference]: Finished difference Result 27317 states and 38767 transitions. [2020-12-22 09:51:32,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:51:32,379 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 95 [2020-12-22 09:51:32,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:51:32,428 INFO L225 Difference]: With dead ends: 27317 [2020-12-22 09:51:32,428 INFO L226 Difference]: Without dead ends: 23843 [2020-12-22 09:51:32,440 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:51:32,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23843 states. [2020-12-22 09:51:33,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23843 to 14457. [2020-12-22 09:51:33,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14457 states. [2020-12-22 09:51:33,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14457 states to 14457 states and 20569 transitions. [2020-12-22 09:51:33,365 INFO L78 Accepts]: Start accepts. Automaton has 14457 states and 20569 transitions. Word has length 95 [2020-12-22 09:51:33,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:51:33,366 INFO L481 AbstractCegarLoop]: Abstraction has 14457 states and 20569 transitions. [2020-12-22 09:51:33,366 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:51:33,366 INFO L276 IsEmpty]: Start isEmpty. Operand 14457 states and 20569 transitions. [2020-12-22 09:51:33,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 09:51:33,371 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:51:33,371 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:51:33,372 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 09:51:33,372 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:51:33,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:51:33,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1702428119, now seen corresponding path program 1 times [2020-12-22 09:51:33,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:51:33,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005202313] [2020-12-22 09:51:33,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:51:33,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:51:33,496 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 09:51:33,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005202313] [2020-12-22 09:51:33,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:51:33,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:51:33,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33986333] [2020-12-22 09:51:33,497 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:51:33,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:51:33,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:51:33,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:51:33,499 INFO L87 Difference]: Start difference. First operand 14457 states and 20569 transitions. Second operand 7 states. [2020-12-22 09:51:35,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:51:35,066 INFO L93 Difference]: Finished difference Result 30789 states and 43615 transitions. [2020-12-22 09:51:35,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:51:35,066 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 95 [2020-12-22 09:51:35,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:51:35,125 INFO L225 Difference]: With dead ends: 30789 [2020-12-22 09:51:35,125 INFO L226 Difference]: Without dead ends: 27315 [2020-12-22 09:51:35,141 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:51:35,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27315 states. [2020-12-22 09:51:36,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27315 to 17929. [2020-12-22 09:51:36,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17929 states. [2020-12-22 09:51:36,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17929 states to 17929 states and 25417 transitions. [2020-12-22 09:51:36,569 INFO L78 Accepts]: Start accepts. Automaton has 17929 states and 25417 transitions. Word has length 95 [2020-12-22 09:51:36,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:51:36,570 INFO L481 AbstractCegarLoop]: Abstraction has 17929 states and 25417 transitions. [2020-12-22 09:51:36,570 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:51:36,570 INFO L276 IsEmpty]: Start isEmpty. Operand 17929 states and 25417 transitions. [2020-12-22 09:51:36,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 09:51:36,575 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:51:36,576 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:51:36,576 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 09:51:36,576 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:51:36,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:51:36,577 INFO L82 PathProgramCache]: Analyzing trace with hash 1357080137, now seen corresponding path program 1 times [2020-12-22 09:51:36,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:51:36,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615293727] [2020-12-22 09:51:36,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:51:36,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:51:36,696 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 09:51:36,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615293727] [2020-12-22 09:51:36,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:51:36,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:51:36,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838073491] [2020-12-22 09:51:36,698 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:51:36,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:51:36,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:51:36,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:51:36,699 INFO L87 Difference]: Start difference. First operand 17929 states and 25417 transitions. Second operand 7 states. [2020-12-22 09:51:38,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:51:38,507 INFO L93 Difference]: Finished difference Result 34261 states and 48463 transitions. [2020-12-22 09:51:38,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:51:38,508 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 95 [2020-12-22 09:51:38,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:51:38,559 INFO L225 Difference]: With dead ends: 34261 [2020-12-22 09:51:38,560 INFO L226 Difference]: Without dead ends: 30787 [2020-12-22 09:51:38,573 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:51:38,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30787 states. [2020-12-22 09:51:40,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30787 to 21401. [2020-12-22 09:51:40,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21401 states. [2020-12-22 09:51:40,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21401 states to 21401 states and 30265 transitions. [2020-12-22 09:51:40,057 INFO L78 Accepts]: Start accepts. Automaton has 21401 states and 30265 transitions. Word has length 95 [2020-12-22 09:51:40,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:51:40,057 INFO L481 AbstractCegarLoop]: Abstraction has 21401 states and 30265 transitions. [2020-12-22 09:51:40,057 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:51:40,057 INFO L276 IsEmpty]: Start isEmpty. Operand 21401 states and 30265 transitions. [2020-12-22 09:51:40,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 09:51:40,062 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:51:40,063 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:51:40,063 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 09:51:40,063 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:51:40,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:51:40,064 INFO L82 PathProgramCache]: Analyzing trace with hash -63915415, now seen corresponding path program 1 times [2020-12-22 09:51:40,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:51:40,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462237854] [2020-12-22 09:51:40,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:51:40,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:51:40,174 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:51:40,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462237854] [2020-12-22 09:51:40,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:51:40,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:51:40,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573079936] [2020-12-22 09:51:40,177 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:51:40,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:51:40,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:51:40,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:51:40,178 INFO L87 Difference]: Start difference. First operand 21401 states and 30265 transitions. Second operand 7 states. [2020-12-22 09:51:42,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:51:42,451 INFO L93 Difference]: Finished difference Result 35653 states and 50431 transitions. [2020-12-22 09:51:42,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:51:42,452 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 95 [2020-12-22 09:51:42,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:51:42,503 INFO L225 Difference]: With dead ends: 35653 [2020-12-22 09:51:42,503 INFO L226 Difference]: Without dead ends: 33219 [2020-12-22 09:51:42,516 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:51:42,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33219 states. [2020-12-22 09:51:44,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33219 to 23833. [2020-12-22 09:51:44,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23833 states. [2020-12-22 09:51:44,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23833 states to 23833 states and 33689 transitions. [2020-12-22 09:51:44,198 INFO L78 Accepts]: Start accepts. Automaton has 23833 states and 33689 transitions. Word has length 95 [2020-12-22 09:51:44,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:51:44,198 INFO L481 AbstractCegarLoop]: Abstraction has 23833 states and 33689 transitions. [2020-12-22 09:51:44,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:51:44,199 INFO L276 IsEmpty]: Start isEmpty. Operand 23833 states and 33689 transitions. [2020-12-22 09:51:44,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-22 09:51:44,206 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:51:44,206 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:51:44,206 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 09:51:44,206 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:51:44,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:51:44,207 INFO L82 PathProgramCache]: Analyzing trace with hash -1416628636, now seen corresponding path program 1 times [2020-12-22 09:51:44,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:51:44,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678817500] [2020-12-22 09:51:44,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:51:44,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:51:44,540 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:51:44,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678817500] [2020-12-22 09:51:44,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033696644] [2020-12-22 09:51:44,541 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 09:51:44,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:51:44,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-22 09:51:44,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:51:45,200 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:51:45,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:51:45,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 21 [2020-12-22 09:51:45,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400351298] [2020-12-22 09:51:45,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 09:51:45,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:51:45,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 09:51:45,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2020-12-22 09:51:45,204 INFO L87 Difference]: Start difference. First operand 23833 states and 33689 transitions. Second operand 21 states. [2020-12-22 09:51:59,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:51:59,853 INFO L93 Difference]: Finished difference Result 140634 states and 195170 transitions. [2020-12-22 09:51:59,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2020-12-22 09:51:59,853 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 96 [2020-12-22 09:51:59,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:52:00,074 INFO L225 Difference]: With dead ends: 140634 [2020-12-22 09:52:00,074 INFO L226 Difference]: Without dead ends: 119096 [2020-12-22 09:52:00,126 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4681 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2354, Invalid=10078, Unknown=0, NotChecked=0, Total=12432 [2020-12-22 09:52:00,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119096 states. [2020-12-22 09:52:07,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119096 to 74513. [2020-12-22 09:52:07,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74513 states. [2020-12-22 09:52:07,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74513 states to 74513 states and 103097 transitions. [2020-12-22 09:52:07,650 INFO L78 Accepts]: Start accepts. Automaton has 74513 states and 103097 transitions. Word has length 96 [2020-12-22 09:52:07,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:52:07,651 INFO L481 AbstractCegarLoop]: Abstraction has 74513 states and 103097 transitions. [2020-12-22 09:52:07,651 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 09:52:07,651 INFO L276 IsEmpty]: Start isEmpty. Operand 74513 states and 103097 transitions. [2020-12-22 09:52:07,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 09:52:07,661 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:52:07,661 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:52:07,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:52:07,875 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:52:07,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:52:07,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1879245087, now seen corresponding path program 1 times [2020-12-22 09:52:07,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:52:07,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442233716] [2020-12-22 09:52:07,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:52:07,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:08,215 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:52:08,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442233716] [2020-12-22 09:52:08,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255949834] [2020-12-22 09:52:08,216 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 09:52:08,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:08,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 09:52:08,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:52:08,693 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:52:09,114 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:52:09,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:52:09,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:52:09,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858543204] [2020-12-22 09:52:09,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:52:09,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:52:09,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:52:09,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:52:09,117 INFO L87 Difference]: Start difference. First operand 74513 states and 103097 transitions. Second operand 17 states. [2020-12-22 09:52:12,892 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2020-12-22 09:52:13,034 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-12-22 09:52:13,447 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2020-12-22 09:52:13,680 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-12-22 09:52:14,308 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2020-12-22 09:52:14,798 WARN L197 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-12-22 09:52:15,072 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2020-12-22 09:52:15,374 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2020-12-22 09:52:16,387 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-12-22 09:52:17,495 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-12-22 09:53:34,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:53:34,592 INFO L93 Difference]: Finished difference Result 860167 states and 1174692 transitions. [2020-12-22 09:53:34,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2020-12-22 09:53:34,592 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 97 [2020-12-22 09:53:34,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:53:35,973 INFO L225 Difference]: With dead ends: 860167 [2020-12-22 09:53:35,973 INFO L226 Difference]: Without dead ends: 787949 [2020-12-22 09:53:36,658 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6261 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=2263, Invalid=14249, Unknown=0, NotChecked=0, Total=16512 [2020-12-22 09:53:37,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 787949 states. [2020-12-22 09:54:14,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 787949 to 337269. [2020-12-22 09:54:14,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 337269 states. [2020-12-22 09:54:15,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337269 states to 337269 states and 460161 transitions. [2020-12-22 09:54:15,451 INFO L78 Accepts]: Start accepts. Automaton has 337269 states and 460161 transitions. Word has length 97 [2020-12-22 09:54:15,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:54:15,465 INFO L481 AbstractCegarLoop]: Abstraction has 337269 states and 460161 transitions. [2020-12-22 09:54:15,465 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:54:15,465 INFO L276 IsEmpty]: Start isEmpty. Operand 337269 states and 460161 transitions. [2020-12-22 09:54:15,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 09:54:15,513 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:54:15,513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:54:15,713 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:54:15,714 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:54:15,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:54:15,715 INFO L82 PathProgramCache]: Analyzing trace with hash -135405655, now seen corresponding path program 1 times [2020-12-22 09:54:15,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:54:15,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105466268] [2020-12-22 09:54:15,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:54:15,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:54:15,814 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 09:54:15,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105466268] [2020-12-22 09:54:15,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:54:15,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:54:15,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047467196] [2020-12-22 09:54:15,815 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:54:15,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:54:15,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:54:15,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:54:15,816 INFO L87 Difference]: Start difference. First operand 337269 states and 460161 transitions. Second operand 3 states.