/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.UNBOUNDED.pals+Problem12_label09.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 09:52:56,423 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 09:52:56,427 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 09:52:56,481 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 09:52:56,481 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 09:52:56,485 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 09:52:56,489 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 09:52:56,497 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 09:52:56,500 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 09:52:56,508 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 09:52:56,510 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 09:52:56,511 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 09:52:56,511 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 09:52:56,514 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 09:52:56,516 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 09:52:56,517 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 09:52:56,529 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 09:52:56,530 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 09:52:56,532 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 09:52:56,534 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 09:52:56,536 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 09:52:56,538 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 09:52:56,539 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 09:52:56,540 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 09:52:56,543 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 09:52:56,547 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 09:52:56,548 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 09:52:56,549 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 09:52:56,550 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 09:52:56,551 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 09:52:56,551 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 09:52:56,552 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 09:52:56,553 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 09:52:56,553 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 09:52:56,554 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 09:52:56,555 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 09:52:56,556 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 09:52:56,598 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 09:52:56,599 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 09:52:56,602 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 09:52:56,603 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 09:52:56,603 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 09:52:56,603 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 09:52:56,604 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 09:52:56,604 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 09:52:56,604 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 09:52:56,604 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 09:52:56,605 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 09:52:56,607 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 09:52:56,607 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 09:52:56,607 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 09:52:56,608 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 09:52:56,608 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 09:52:56,608 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 09:52:56,608 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:52:56,609 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 09:52:56,609 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 09:52:56,609 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 09:52:56,609 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 09:52:56,610 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 09:52:56,610 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 09:52:56,610 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 09:52:56,610 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 09:52:57,009 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 09:52:57,054 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 09:52:57,058 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 09:52:57,060 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 09:52:57,061 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 09:52:57,062 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.5.1.ufo.UNBOUNDED.pals+Problem12_label09.c [2020-12-22 09:52:57,148 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19fe0b749/7ee32d468c2b4932a64ad70cf1be053a/FLAGcd2d28eda [2020-12-22 09:52:58,233 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 09:52:58,235 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.5.1.ufo.UNBOUNDED.pals+Problem12_label09.c [2020-12-22 09:52:58,277 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19fe0b749/7ee32d468c2b4932a64ad70cf1be053a/FLAGcd2d28eda [2020-12-22 09:52:58,709 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19fe0b749/7ee32d468c2b4932a64ad70cf1be053a [2020-12-22 09:52:58,711 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 09:52:58,713 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 09:52:58,715 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 09:52:58,715 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 09:52:58,719 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 09:52:58,720 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:52:58" (1/1) ... [2020-12-22 09:52:58,722 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f2070fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:52:58, skipping insertion in model container [2020-12-22 09:52:58,722 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:52:58" (1/1) ... [2020-12-22 09:52:58,736 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 09:52:58,924 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 09:52:59,257 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.UNBOUNDED.pals+Problem12_label09.c[11795,11808] [2020-12-22 09:52:59,347 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.UNBOUNDED.pals+Problem12_label09.c[19300,19313] [2020-12-22 09:53:00,297 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:53:00,311 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 09:53:00,431 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.UNBOUNDED.pals+Problem12_label09.c[11795,11808] [2020-12-22 09:53:00,485 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.UNBOUNDED.pals+Problem12_label09.c[19300,19313] [2020-12-22 09:53:01,059 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:53:01,104 INFO L208 MainTranslator]: Completed translation [2020-12-22 09:53:01,105 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:53:01 WrapperNode [2020-12-22 09:53:01,105 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 09:53:01,107 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 09:53:01,107 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 09:53:01,107 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 09:53:01,116 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:53:01" (1/1) ... [2020-12-22 09:53:01,185 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:53:01" (1/1) ... [2020-12-22 09:53:01,720 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 09:53:01,721 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 09:53:01,721 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 09:53:01,722 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 09:53:01,733 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:53:01" (1/1) ... [2020-12-22 09:53:01,733 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:53:01" (1/1) ... [2020-12-22 09:53:01,788 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:53:01" (1/1) ... [2020-12-22 09:53:01,788 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:53:01" (1/1) ... [2020-12-22 09:53:02,007 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:53:01" (1/1) ... [2020-12-22 09:53:02,064 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:53:01" (1/1) ... [2020-12-22 09:53:02,111 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:53:01" (1/1) ... [2020-12-22 09:53:02,173 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 09:53:02,174 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 09:53:02,175 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 09:53:02,175 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 09:53:02,176 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:53:01" (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 09:53:02,298 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 09:53:02,299 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 09:53:02,299 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 09:53:02,300 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 09:53:07,929 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 09:53:07,929 INFO L299 CfgBuilder]: Removed 36 assume(true) statements. [2020-12-22 09:53:07,933 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:53:07 BoogieIcfgContainer [2020-12-22 09:53:07,934 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 09:53:07,937 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 09:53:07,939 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 09:53:07,943 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 09:53:07,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:52:58" (1/3) ... [2020-12-22 09:53:07,944 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20dc7609 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:53:07, skipping insertion in model container [2020-12-22 09:53:07,945 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:53:01" (2/3) ... [2020-12-22 09:53:07,945 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20dc7609 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:53:07, skipping insertion in model container [2020-12-22 09:53:07,945 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:53:07" (3/3) ... [2020-12-22 09:53:07,947 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.5.1.ufo.UNBOUNDED.pals+Problem12_label09.c [2020-12-22 09:53:07,954 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 09:53:07,960 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 09:53:07,979 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 09:53:08,019 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 09:53:08,019 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 09:53:08,019 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 09:53:08,019 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 09:53:08,019 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 09:53:08,020 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 09:53:08,020 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 09:53:08,020 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 09:53:08,064 INFO L276 IsEmpty]: Start isEmpty. Operand 910 states. [2020-12-22 09:53:08,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 09:53:08,079 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:08,080 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 09:53:08,080 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:08,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:08,087 INFO L82 PathProgramCache]: Analyzing trace with hash -1083425478, now seen corresponding path program 1 times [2020-12-22 09:53:08,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:08,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670299193] [2020-12-22 09:53:08,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:08,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:08,352 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 09:53:08,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670299193] [2020-12-22 09:53:08,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:53:08,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:53:08,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177173999] [2020-12-22 09:53:08,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 09:53:08,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:08,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 09:53:08,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 09:53:08,387 INFO L87 Difference]: Start difference. First operand 910 states. Second operand 2 states. [2020-12-22 09:53:08,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:53:08,503 INFO L93 Difference]: Finished difference Result 1781 states and 3376 transitions. [2020-12-22 09:53:08,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 09:53:08,505 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 34 [2020-12-22 09:53:08,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:53:08,559 INFO L225 Difference]: With dead ends: 1781 [2020-12-22 09:53:08,559 INFO L226 Difference]: Without dead ends: 844 [2020-12-22 09:53:08,567 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 09:53:08,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 844 states. [2020-12-22 09:53:08,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 844 to 844. [2020-12-22 09:53:08,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 844 states. [2020-12-22 09:53:08,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 1591 transitions. [2020-12-22 09:53:08,663 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 1591 transitions. Word has length 34 [2020-12-22 09:53:08,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:53:08,664 INFO L481 AbstractCegarLoop]: Abstraction has 844 states and 1591 transitions. [2020-12-22 09:53:08,664 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 09:53:08,664 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 1591 transitions. [2020-12-22 09:53:08,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 09:53:08,666 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:08,666 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 09:53:08,667 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 09:53:08,667 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:08,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:08,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1592898568, now seen corresponding path program 1 times [2020-12-22 09:53:08,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:08,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452411392] [2020-12-22 09:53:08,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:08,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:08,853 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 09:53:08,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452411392] [2020-12-22 09:53:08,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:53:08,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:53:08,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490943936] [2020-12-22 09:53:08,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:53:08,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:08,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:53:08,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:53:08,859 INFO L87 Difference]: Start difference. First operand 844 states and 1591 transitions. Second operand 5 states. [2020-12-22 09:53:09,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:53:09,002 INFO L93 Difference]: Finished difference Result 901 states and 1679 transitions. [2020-12-22 09:53:09,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:53:09,002 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-12-22 09:53:09,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:53:09,008 INFO L225 Difference]: With dead ends: 901 [2020-12-22 09:53:09,008 INFO L226 Difference]: Without dead ends: 844 [2020-12-22 09:53:09,010 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 09:53:09,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 844 states. [2020-12-22 09:53:09,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 844 to 844. [2020-12-22 09:53:09,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 844 states. [2020-12-22 09:53:09,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 1560 transitions. [2020-12-22 09:53:09,037 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 1560 transitions. Word has length 34 [2020-12-22 09:53:09,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:53:09,037 INFO L481 AbstractCegarLoop]: Abstraction has 844 states and 1560 transitions. [2020-12-22 09:53:09,037 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:53:09,038 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 1560 transitions. [2020-12-22 09:53:09,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:53:09,040 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:09,041 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 09:53:09,041 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 09:53:09,041 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:09,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:09,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1337087153, now seen corresponding path program 1 times [2020-12-22 09:53:09,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:09,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853274460] [2020-12-22 09:53:09,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:09,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:09,230 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 09:53:09,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853274460] [2020-12-22 09:53:09,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:53:09,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:53:09,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488104366] [2020-12-22 09:53:09,232 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:53:09,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:09,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:53:09,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:53:09,234 INFO L87 Difference]: Start difference. First operand 844 states and 1560 transitions. Second operand 3 states. [2020-12-22 09:53:09,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:53:09,277 INFO L93 Difference]: Finished difference Result 944 states and 1718 transitions. [2020-12-22 09:53:09,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:53:09,277 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 09:53:09,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:53:09,285 INFO L225 Difference]: With dead ends: 944 [2020-12-22 09:53:09,286 INFO L226 Difference]: Without dead ends: 891 [2020-12-22 09:53:09,289 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 09:53:09,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2020-12-22 09:53:09,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 889. [2020-12-22 09:53:09,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 889 states. [2020-12-22 09:53:09,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 1632 transitions. [2020-12-22 09:53:09,327 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 1632 transitions. Word has length 64 [2020-12-22 09:53:09,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:53:09,328 INFO L481 AbstractCegarLoop]: Abstraction has 889 states and 1632 transitions. [2020-12-22 09:53:09,328 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:53:09,328 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 1632 transitions. [2020-12-22 09:53:09,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:53:09,335 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:09,335 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 09:53:09,336 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 09:53:09,336 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:09,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:09,337 INFO L82 PathProgramCache]: Analyzing trace with hash -119101755, now seen corresponding path program 1 times [2020-12-22 09:53:09,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:09,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886386481] [2020-12-22 09:53:09,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:09,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:09,554 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 09:53:09,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886386481] [2020-12-22 09:53:09,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:53:09,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:53:09,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793476197] [2020-12-22 09:53:09,556 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:53:09,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:09,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:53:09,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:53:09,558 INFO L87 Difference]: Start difference. First operand 889 states and 1632 transitions. Second operand 7 states. [2020-12-22 09:53:09,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:53:09,921 INFO L93 Difference]: Finished difference Result 1869 states and 3192 transitions. [2020-12-22 09:53:09,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 09:53:09,921 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 64 [2020-12-22 09:53:09,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:53:09,932 INFO L225 Difference]: With dead ends: 1869 [2020-12-22 09:53:09,932 INFO L226 Difference]: Without dead ends: 1771 [2020-12-22 09:53:09,934 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 09:53:09,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1771 states. [2020-12-22 09:53:09,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1771 to 985. [2020-12-22 09:53:09,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 985 states. [2020-12-22 09:53:09,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 1783 transitions. [2020-12-22 09:53:09,974 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 1783 transitions. Word has length 64 [2020-12-22 09:53:09,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:53:09,975 INFO L481 AbstractCegarLoop]: Abstraction has 985 states and 1783 transitions. [2020-12-22 09:53:09,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:53:09,975 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 1783 transitions. [2020-12-22 09:53:09,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:53:09,976 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:09,976 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 09:53:09,977 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 09:53:09,977 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:09,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:09,978 INFO L82 PathProgramCache]: Analyzing trace with hash 91634997, now seen corresponding path program 1 times [2020-12-22 09:53:09,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:09,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891395996] [2020-12-22 09:53:09,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:10,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:10,060 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 09:53:10,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891395996] [2020-12-22 09:53:10,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:53:10,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:53:10,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525465608] [2020-12-22 09:53:10,062 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:53:10,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:10,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:53:10,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:53:10,063 INFO L87 Difference]: Start difference. First operand 985 states and 1783 transitions. Second operand 3 states. [2020-12-22 09:53:10,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:53:10,125 INFO L93 Difference]: Finished difference Result 1351 states and 2359 transitions. [2020-12-22 09:53:10,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:53:10,126 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 09:53:10,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:53:10,133 INFO L225 Difference]: With dead ends: 1351 [2020-12-22 09:53:10,133 INFO L226 Difference]: Without dead ends: 1157 [2020-12-22 09:53:10,134 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 09:53:10,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1157 states. [2020-12-22 09:53:10,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1157 to 1151. [2020-12-22 09:53:10,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1151 states. [2020-12-22 09:53:10,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1151 states to 1151 states and 2037 transitions. [2020-12-22 09:53:10,173 INFO L78 Accepts]: Start accepts. Automaton has 1151 states and 2037 transitions. Word has length 66 [2020-12-22 09:53:10,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:53:10,173 INFO L481 AbstractCegarLoop]: Abstraction has 1151 states and 2037 transitions. [2020-12-22 09:53:10,173 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:53:10,174 INFO L276 IsEmpty]: Start isEmpty. Operand 1151 states and 2037 transitions. [2020-12-22 09:53:10,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:53:10,175 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:10,175 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 09:53:10,175 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 09:53:10,175 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:10,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:10,176 INFO L82 PathProgramCache]: Analyzing trace with hash 158128509, now seen corresponding path program 1 times [2020-12-22 09:53:10,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:10,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228046497] [2020-12-22 09:53:10,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:10,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:10,421 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 09:53:10,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228046497] [2020-12-22 09:53:10,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:53:10,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:53:10,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048668323] [2020-12-22 09:53:10,423 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:53:10,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:10,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:53:10,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:53:10,424 INFO L87 Difference]: Start difference. First operand 1151 states and 2037 transitions. Second operand 7 states. [2020-12-22 09:53:10,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:53:10,688 INFO L93 Difference]: Finished difference Result 1513 states and 2599 transitions. [2020-12-22 09:53:10,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:53:10,689 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 66 [2020-12-22 09:53:10,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:53:10,698 INFO L225 Difference]: With dead ends: 1513 [2020-12-22 09:53:10,699 INFO L226 Difference]: Without dead ends: 1153 [2020-12-22 09:53:10,700 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 09:53:10,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1153 states. [2020-12-22 09:53:10,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1153 to 1151. [2020-12-22 09:53:10,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1151 states. [2020-12-22 09:53:10,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1151 states to 1151 states and 2033 transitions. [2020-12-22 09:53:10,745 INFO L78 Accepts]: Start accepts. Automaton has 1151 states and 2033 transitions. Word has length 66 [2020-12-22 09:53:10,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:53:10,745 INFO L481 AbstractCegarLoop]: Abstraction has 1151 states and 2033 transitions. [2020-12-22 09:53:10,745 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:53:10,745 INFO L276 IsEmpty]: Start isEmpty. Operand 1151 states and 2033 transitions. [2020-12-22 09:53:10,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:53:10,746 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:10,747 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 09:53:10,748 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 09:53:10,752 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:10,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:10,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1100417095, now seen corresponding path program 1 times [2020-12-22 09:53:10,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:10,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211122740] [2020-12-22 09:53:10,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:10,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:10,857 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 09:53:10,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211122740] [2020-12-22 09:53:10,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:53:10,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:53:10,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517490114] [2020-12-22 09:53:10,860 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:53:10,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:10,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:53:10,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:53:10,862 INFO L87 Difference]: Start difference. First operand 1151 states and 2033 transitions. Second operand 3 states. [2020-12-22 09:53:10,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:53:10,923 INFO L93 Difference]: Finished difference Result 1823 states and 3067 transitions. [2020-12-22 09:53:10,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:53:10,924 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 09:53:10,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:53:10,932 INFO L225 Difference]: With dead ends: 1823 [2020-12-22 09:53:10,932 INFO L226 Difference]: Without dead ends: 1463 [2020-12-22 09:53:10,933 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 09:53:10,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1463 states. [2020-12-22 09:53:10,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1463 to 1461. [2020-12-22 09:53:10,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1461 states. [2020-12-22 09:53:10,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1461 states to 1461 states and 2501 transitions. [2020-12-22 09:53:10,988 INFO L78 Accepts]: Start accepts. Automaton has 1461 states and 2501 transitions. Word has length 66 [2020-12-22 09:53:10,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:53:10,989 INFO L481 AbstractCegarLoop]: Abstraction has 1461 states and 2501 transitions. [2020-12-22 09:53:10,989 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:53:10,989 INFO L276 IsEmpty]: Start isEmpty. Operand 1461 states and 2501 transitions. [2020-12-22 09:53:10,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:53:10,990 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:10,990 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 09:53:10,991 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 09:53:10,991 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:10,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:10,991 INFO L82 PathProgramCache]: Analyzing trace with hash -826729383, now seen corresponding path program 1 times [2020-12-22 09:53:10,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:10,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75070081] [2020-12-22 09:53:10,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:11,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:11,043 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 09:53:11,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75070081] [2020-12-22 09:53:11,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:53:11,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:53:11,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107625398] [2020-12-22 09:53:11,045 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:53:11,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:11,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:53:11,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:53:11,046 INFO L87 Difference]: Start difference. First operand 1461 states and 2501 transitions. Second operand 3 states. [2020-12-22 09:53:11,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:53:11,128 INFO L93 Difference]: Finished difference Result 2705 states and 4391 transitions. [2020-12-22 09:53:11,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:53:11,129 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 09:53:11,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:53:11,139 INFO L225 Difference]: With dead ends: 2705 [2020-12-22 09:53:11,139 INFO L226 Difference]: Without dead ends: 2035 [2020-12-22 09:53:11,194 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 09:53:11,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2035 states. [2020-12-22 09:53:11,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2035 to 2033. [2020-12-22 09:53:11,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2033 states. [2020-12-22 09:53:11,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2033 states to 2033 states and 3349 transitions. [2020-12-22 09:53:11,306 INFO L78 Accepts]: Start accepts. Automaton has 2033 states and 3349 transitions. Word has length 66 [2020-12-22 09:53:11,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:53:11,306 INFO L481 AbstractCegarLoop]: Abstraction has 2033 states and 3349 transitions. [2020-12-22 09:53:11,307 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:53:11,307 INFO L276 IsEmpty]: Start isEmpty. Operand 2033 states and 3349 transitions. [2020-12-22 09:53:11,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:53:11,308 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:11,308 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 09:53:11,308 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 09:53:11,308 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:11,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:11,309 INFO L82 PathProgramCache]: Analyzing trace with hash 992342265, now seen corresponding path program 1 times [2020-12-22 09:53:11,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:11,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433880555] [2020-12-22 09:53:11,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:11,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:11,402 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 09:53:11,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433880555] [2020-12-22 09:53:11,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:53:11,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:53:11,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307749806] [2020-12-22 09:53:11,404 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:53:11,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:11,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:53:11,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:53:11,407 INFO L87 Difference]: Start difference. First operand 2033 states and 3349 transitions. Second operand 3 states. [2020-12-22 09:53:11,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:53:11,592 INFO L93 Difference]: Finished difference Result 4325 states and 6775 transitions. [2020-12-22 09:53:11,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:53:11,593 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 09:53:11,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:53:11,612 INFO L225 Difference]: With dead ends: 4325 [2020-12-22 09:53:11,612 INFO L226 Difference]: Without dead ends: 3083 [2020-12-22 09:53:11,618 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 09:53:11,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3083 states. [2020-12-22 09:53:11,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3083 to 3081. [2020-12-22 09:53:11,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3081 states. [2020-12-22 09:53:11,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3081 states to 3081 states and 4869 transitions. [2020-12-22 09:53:11,814 INFO L78 Accepts]: Start accepts. Automaton has 3081 states and 4869 transitions. Word has length 66 [2020-12-22 09:53:11,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:53:11,815 INFO L481 AbstractCegarLoop]: Abstraction has 3081 states and 4869 transitions. [2020-12-22 09:53:11,815 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:53:11,815 INFO L276 IsEmpty]: Start isEmpty. Operand 3081 states and 4869 transitions. [2020-12-22 09:53:11,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:53:11,822 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:11,822 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:53:11,822 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 09:53:11,823 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:11,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:11,823 INFO L82 PathProgramCache]: Analyzing trace with hash 192293446, now seen corresponding path program 1 times [2020-12-22 09:53:11,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:11,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226153644] [2020-12-22 09:53:11,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:11,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:11,949 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 09:53:11,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226153644] [2020-12-22 09:53:11,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:53:11,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:53:11,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561508972] [2020-12-22 09:53:11,951 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:53:11,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:11,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:53:11,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:53:11,952 INFO L87 Difference]: Start difference. First operand 3081 states and 4869 transitions. Second operand 5 states. [2020-12-22 09:53:12,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:53:12,282 INFO L93 Difference]: Finished difference Result 4807 states and 7371 transitions. [2020-12-22 09:53:12,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:53:12,283 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 67 [2020-12-22 09:53:12,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:53:12,309 INFO L225 Difference]: With dead ends: 4807 [2020-12-22 09:53:12,309 INFO L226 Difference]: Without dead ends: 4805 [2020-12-22 09:53:12,312 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 09:53:12,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4805 states. [2020-12-22 09:53:12,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4805 to 3177. [2020-12-22 09:53:12,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3177 states. [2020-12-22 09:53:12,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3177 states to 3177 states and 4949 transitions. [2020-12-22 09:53:12,525 INFO L78 Accepts]: Start accepts. Automaton has 3177 states and 4949 transitions. Word has length 67 [2020-12-22 09:53:12,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:53:12,526 INFO L481 AbstractCegarLoop]: Abstraction has 3177 states and 4949 transitions. [2020-12-22 09:53:12,526 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:53:12,526 INFO L276 IsEmpty]: Start isEmpty. Operand 3177 states and 4949 transitions. [2020-12-22 09:53:12,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:53:12,527 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:12,527 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 09:53:12,527 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 09:53:12,527 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:12,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:12,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1015383421, now seen corresponding path program 1 times [2020-12-22 09:53:12,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:12,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887722148] [2020-12-22 09:53:12,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:12,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:12,639 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 09:53:12,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887722148] [2020-12-22 09:53:12,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:53:12,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:53:12,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024743516] [2020-12-22 09:53:12,641 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:53:12,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:12,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:53:12,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:53:12,643 INFO L87 Difference]: Start difference. First operand 3177 states and 4949 transitions. Second operand 4 states. [2020-12-22 09:53:24,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:53:24,213 INFO L93 Difference]: Finished difference Result 5432 states and 9258 transitions. [2020-12-22 09:53:24,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:53:24,214 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-12-22 09:53:24,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:53:24,239 INFO L225 Difference]: With dead ends: 5432 [2020-12-22 09:53:24,239 INFO L226 Difference]: Without dead ends: 4679 [2020-12-22 09:53:24,242 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 09:53:24,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4679 states. [2020-12-22 09:53:24,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4679 to 4679. [2020-12-22 09:53:24,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4679 states. [2020-12-22 09:53:24,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4679 states to 4679 states and 7063 transitions. [2020-12-22 09:53:24,491 INFO L78 Accepts]: Start accepts. Automaton has 4679 states and 7063 transitions. Word has length 67 [2020-12-22 09:53:24,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:53:24,491 INFO L481 AbstractCegarLoop]: Abstraction has 4679 states and 7063 transitions. [2020-12-22 09:53:24,491 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:53:24,491 INFO L276 IsEmpty]: Start isEmpty. Operand 4679 states and 7063 transitions. [2020-12-22 09:53:24,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 09:53:24,492 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:24,493 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:53:24,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 09:53:24,493 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:24,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:24,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1338319212, now seen corresponding path program 1 times [2020-12-22 09:53:24,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:24,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25930851] [2020-12-22 09:53:24,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:24,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:24,571 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 09:53:24,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25930851] [2020-12-22 09:53:24,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:53:24,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:53:24,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526489267] [2020-12-22 09:53:24,573 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:53:24,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:24,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:53:24,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:53:24,663 INFO L87 Difference]: Start difference. First operand 4679 states and 7063 transitions. Second operand 3 states. [2020-12-22 09:53:24,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:53:24,977 INFO L93 Difference]: Finished difference Result 7118 states and 10653 transitions. [2020-12-22 09:53:24,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:53:24,978 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 68 [2020-12-22 09:53:24,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:53:25,016 INFO L225 Difference]: With dead ends: 7118 [2020-12-22 09:53:25,017 INFO L226 Difference]: Without dead ends: 5771 [2020-12-22 09:53:25,022 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 09:53:25,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5771 states. [2020-12-22 09:53:25,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5771 to 5769. [2020-12-22 09:53:25,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5769 states. [2020-12-22 09:53:25,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5769 states to 5769 states and 8617 transitions. [2020-12-22 09:53:25,439 INFO L78 Accepts]: Start accepts. Automaton has 5769 states and 8617 transitions. Word has length 68 [2020-12-22 09:53:25,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:53:25,440 INFO L481 AbstractCegarLoop]: Abstraction has 5769 states and 8617 transitions. [2020-12-22 09:53:25,440 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:53:25,440 INFO L276 IsEmpty]: Start isEmpty. Operand 5769 states and 8617 transitions. [2020-12-22 09:53:25,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 09:53:25,444 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:25,444 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:53:25,445 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 09:53:25,445 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:25,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:25,445 INFO L82 PathProgramCache]: Analyzing trace with hash 320828100, now seen corresponding path program 1 times [2020-12-22 09:53:25,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:25,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043476604] [2020-12-22 09:53:25,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:25,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:25,602 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-22 09:53:25,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043476604] [2020-12-22 09:53:25,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:53:25,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:53:25,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461257483] [2020-12-22 09:53:25,603 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:53:25,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:25,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:53:25,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:53:25,611 INFO L87 Difference]: Start difference. First operand 5769 states and 8617 transitions. Second operand 7 states. [2020-12-22 09:53:26,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:53:26,901 INFO L93 Difference]: Finished difference Result 23845 states and 34719 transitions. [2020-12-22 09:53:26,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:53:26,901 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 94 [2020-12-22 09:53:26,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:53:26,948 INFO L225 Difference]: With dead ends: 23845 [2020-12-22 09:53:26,948 INFO L226 Difference]: Without dead ends: 20371 [2020-12-22 09:53:26,959 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 09:53:26,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20371 states. [2020-12-22 09:53:27,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20371 to 9241. [2020-12-22 09:53:27,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9241 states. [2020-12-22 09:53:27,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9241 states to 9241 states and 13593 transitions. [2020-12-22 09:53:27,578 INFO L78 Accepts]: Start accepts. Automaton has 9241 states and 13593 transitions. Word has length 94 [2020-12-22 09:53:27,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:53:27,578 INFO L481 AbstractCegarLoop]: Abstraction has 9241 states and 13593 transitions. [2020-12-22 09:53:27,578 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:53:27,578 INFO L276 IsEmpty]: Start isEmpty. Operand 9241 states and 13593 transitions. [2020-12-22 09:53:27,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 09:53:27,582 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:27,582 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:53:27,583 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 09:53:27,583 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:27,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:27,583 INFO L82 PathProgramCache]: Analyzing trace with hash 350350318, now seen corresponding path program 1 times [2020-12-22 09:53:27,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:27,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610986322] [2020-12-22 09:53:27,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:27,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:27,699 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-22 09:53:27,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610986322] [2020-12-22 09:53:27,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:53:27,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:53:27,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266783599] [2020-12-22 09:53:27,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:53:27,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:27,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:53:27,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:53:27,701 INFO L87 Difference]: Start difference. First operand 9241 states and 13593 transitions. Second operand 7 states. [2020-12-22 09:53:29,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:53:29,045 INFO L93 Difference]: Finished difference Result 27317 states and 39695 transitions. [2020-12-22 09:53:29,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:53:29,046 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 94 [2020-12-22 09:53:29,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:53:29,098 INFO L225 Difference]: With dead ends: 27317 [2020-12-22 09:53:29,099 INFO L226 Difference]: Without dead ends: 23843 [2020-12-22 09:53:29,113 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 09:53:29,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23843 states. [2020-12-22 09:53:30,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23843 to 14457. [2020-12-22 09:53:30,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14457 states. [2020-12-22 09:53:30,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14457 states to 14457 states and 21017 transitions. [2020-12-22 09:53:30,430 INFO L78 Accepts]: Start accepts. Automaton has 14457 states and 21017 transitions. Word has length 94 [2020-12-22 09:53:30,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:53:30,431 INFO L481 AbstractCegarLoop]: Abstraction has 14457 states and 21017 transitions. [2020-12-22 09:53:30,431 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:53:30,431 INFO L276 IsEmpty]: Start isEmpty. Operand 14457 states and 21017 transitions. [2020-12-22 09:53:30,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 09:53:30,435 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:30,435 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:53:30,436 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 09:53:30,436 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:30,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:30,436 INFO L82 PathProgramCache]: Analyzing trace with hash 624038030, now seen corresponding path program 1 times [2020-12-22 09:53:30,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:30,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281051998] [2020-12-22 09:53:30,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:30,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:30,568 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 09:53:30,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281051998] [2020-12-22 09:53:30,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:53:30,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:53:30,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678079692] [2020-12-22 09:53:30,569 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:53:30,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:30,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:53:30,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:53:30,570 INFO L87 Difference]: Start difference. First operand 14457 states and 21017 transitions. Second operand 7 states. [2020-12-22 09:53:31,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:53:31,967 INFO L93 Difference]: Finished difference Result 30789 states and 44671 transitions. [2020-12-22 09:53:31,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:53:31,968 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 94 [2020-12-22 09:53:31,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:53:32,029 INFO L225 Difference]: With dead ends: 30789 [2020-12-22 09:53:32,029 INFO L226 Difference]: Without dead ends: 27315 [2020-12-22 09:53:32,043 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 09:53:32,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27315 states. [2020-12-22 09:53:33,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27315 to 17929. [2020-12-22 09:53:33,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17929 states. [2020-12-22 09:53:33,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17929 states to 17929 states and 25993 transitions. [2020-12-22 09:53:33,362 INFO L78 Accepts]: Start accepts. Automaton has 17929 states and 25993 transitions. Word has length 94 [2020-12-22 09:53:33,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:53:33,362 INFO L481 AbstractCegarLoop]: Abstraction has 17929 states and 25993 transitions. [2020-12-22 09:53:33,362 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:53:33,362 INFO L276 IsEmpty]: Start isEmpty. Operand 17929 states and 25993 transitions. [2020-12-22 09:53:33,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 09:53:33,366 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:33,366 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:53:33,367 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 09:53:33,367 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:33,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:33,367 INFO L82 PathProgramCache]: Analyzing trace with hash -1851857618, now seen corresponding path program 1 times [2020-12-22 09:53:33,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:33,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225156496] [2020-12-22 09:53:33,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:33,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:33,486 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 09:53:33,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225156496] [2020-12-22 09:53:33,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:53:33,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:53:33,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866300476] [2020-12-22 09:53:33,488 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:53:33,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:33,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:53:33,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:53:33,489 INFO L87 Difference]: Start difference. First operand 17929 states and 25993 transitions. Second operand 7 states. [2020-12-22 09:53:34,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:53:34,955 INFO L93 Difference]: Finished difference Result 34261 states and 49647 transitions. [2020-12-22 09:53:34,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:53:34,956 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 94 [2020-12-22 09:53:34,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:53:35,005 INFO L225 Difference]: With dead ends: 34261 [2020-12-22 09:53:35,005 INFO L226 Difference]: Without dead ends: 30787 [2020-12-22 09:53:35,018 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 09:53:35,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30787 states. [2020-12-22 09:53:36,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30787 to 21401. [2020-12-22 09:53:36,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21401 states. [2020-12-22 09:53:36,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21401 states to 21401 states and 30969 transitions. [2020-12-22 09:53:36,273 INFO L78 Accepts]: Start accepts. Automaton has 21401 states and 30969 transitions. Word has length 94 [2020-12-22 09:53:36,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:53:36,274 INFO L481 AbstractCegarLoop]: Abstraction has 21401 states and 30969 transitions. [2020-12-22 09:53:36,274 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:53:36,274 INFO L276 IsEmpty]: Start isEmpty. Operand 21401 states and 30969 transitions. [2020-12-22 09:53:36,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-22 09:53:36,280 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:36,280 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-12-22 09:53:36,280 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 09:53:36,281 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:36,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:36,281 INFO L82 PathProgramCache]: Analyzing trace with hash 2023924156, now seen corresponding path program 1 times [2020-12-22 09:53:36,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:36,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225474448] [2020-12-22 09:53:36,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:36,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:36,365 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:53:36,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225474448] [2020-12-22 09:53:36,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:53:36,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:53:36,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597890525] [2020-12-22 09:53:36,367 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:53:36,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:36,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:53:36,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:53:36,368 INFO L87 Difference]: Start difference. First operand 21401 states and 30969 transitions. Second operand 3 states. [2020-12-22 09:53:37,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:53:37,726 INFO L93 Difference]: Finished difference Result 34810 states and 50366 transitions. [2020-12-22 09:53:37,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:53:37,727 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 96 [2020-12-22 09:53:37,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:53:37,746 INFO L225 Difference]: With dead ends: 34810 [2020-12-22 09:53:37,746 INFO L226 Difference]: Without dead ends: 15704 [2020-12-22 09:53:37,770 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 09:53:37,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15704 states. [2020-12-22 09:53:38,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15704 to 15702. [2020-12-22 09:53:38,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15702 states. [2020-12-22 09:53:38,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15702 states to 15702 states and 22811 transitions. [2020-12-22 09:53:38,561 INFO L78 Accepts]: Start accepts. Automaton has 15702 states and 22811 transitions. Word has length 96 [2020-12-22 09:53:38,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:53:38,561 INFO L481 AbstractCegarLoop]: Abstraction has 15702 states and 22811 transitions. [2020-12-22 09:53:38,561 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:53:38,561 INFO L276 IsEmpty]: Start isEmpty. Operand 15702 states and 22811 transitions. [2020-12-22 09:53:38,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-22 09:53:38,565 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:38,565 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:53:38,565 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 09:53:38,565 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:38,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:38,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1980328951, now seen corresponding path program 1 times [2020-12-22 09:53:38,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:38,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799114988] [2020-12-22 09:53:38,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:38,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:38,678 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:53:38,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799114988] [2020-12-22 09:53:38,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:53:38,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:53:38,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713881980] [2020-12-22 09:53:38,681 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:53:38,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:38,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:53:38,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:53:38,682 INFO L87 Difference]: Start difference. First operand 15702 states and 22811 transitions. Second operand 7 states. [2020-12-22 09:53:40,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:53:40,261 INFO L93 Difference]: Finished difference Result 27874 states and 40417 transitions. [2020-12-22 09:53:40,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:53:40,262 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 96 [2020-12-22 09:53:40,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:53:40,292 INFO L225 Difference]: With dead ends: 27874 [2020-12-22 09:53:40,293 INFO L226 Difference]: Without dead ends: 25440 [2020-12-22 09:53:40,302 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 09:53:40,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25440 states. [2020-12-22 09:53:41,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25440 to 18134. [2020-12-22 09:53:41,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18134 states. [2020-12-22 09:53:41,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18134 states to 18134 states and 26299 transitions. [2020-12-22 09:53:41,537 INFO L78 Accepts]: Start accepts. Automaton has 18134 states and 26299 transitions. Word has length 96 [2020-12-22 09:53:41,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:53:41,537 INFO L481 AbstractCegarLoop]: Abstraction has 18134 states and 26299 transitions. [2020-12-22 09:53:41,537 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:53:41,537 INFO L276 IsEmpty]: Start isEmpty. Operand 18134 states and 26299 transitions. [2020-12-22 09:53:41,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 09:53:41,543 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:41,543 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:53:41,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 09:53:41,543 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:41,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:41,544 INFO L82 PathProgramCache]: Analyzing trace with hash 28168523, now seen corresponding path program 1 times [2020-12-22 09:53:41,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:41,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381958224] [2020-12-22 09:53:41,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:41,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:41,612 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:53:41,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381958224] [2020-12-22 09:53:41,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:53:41,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:53:41,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575231619] [2020-12-22 09:53:41,614 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:53:41,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:41,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:53:41,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:53:41,616 INFO L87 Difference]: Start difference. First operand 18134 states and 26299 transitions. Second operand 3 states. [2020-12-22 09:53:42,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:53:42,109 INFO L93 Difference]: Finished difference Result 26042 states and 37637 transitions. [2020-12-22 09:53:42,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:53:42,110 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 97 [2020-12-22 09:53:42,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:53:42,124 INFO L225 Difference]: With dead ends: 26042 [2020-12-22 09:53:42,124 INFO L226 Difference]: Without dead ends: 10232 [2020-12-22 09:53:42,136 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 09:53:42,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10232 states. [2020-12-22 09:53:42,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10232 to 10230. [2020-12-22 09:53:42,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10230 states. [2020-12-22 09:53:42,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10230 states to 10230 states and 14859 transitions. [2020-12-22 09:53:42,734 INFO L78 Accepts]: Start accepts. Automaton has 10230 states and 14859 transitions. Word has length 97 [2020-12-22 09:53:42,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:53:42,734 INFO L481 AbstractCegarLoop]: Abstraction has 10230 states and 14859 transitions. [2020-12-22 09:53:42,735 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:53:42,735 INFO L276 IsEmpty]: Start isEmpty. Operand 10230 states and 14859 transitions. [2020-12-22 09:53:42,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 09:53:42,738 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:42,738 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:53:42,738 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 09:53:42,738 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:42,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:42,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1887443071, now seen corresponding path program 1 times [2020-12-22 09:53:42,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:42,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254593613] [2020-12-22 09:53:42,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:42,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:42,797 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:53:42,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254593613] [2020-12-22 09:53:42,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:53:42,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:53:42,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869319773] [2020-12-22 09:53:42,798 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:53:42,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:42,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:53:42,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:53:42,799 INFO L87 Difference]: Start difference. First operand 10230 states and 14859 transitions. Second operand 3 states. [2020-12-22 09:53:43,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:53:43,112 INFO L93 Difference]: Finished difference Result 14186 states and 20477 transitions. [2020-12-22 09:53:43,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:53:43,112 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 97 [2020-12-22 09:53:43,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:53:43,122 INFO L225 Difference]: With dead ends: 14186 [2020-12-22 09:53:43,122 INFO L226 Difference]: Without dead ends: 6280 [2020-12-22 09:53:43,131 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 09:53:43,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6280 states. [2020-12-22 09:53:43,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6280 to 6278. [2020-12-22 09:53:43,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6278 states. [2020-12-22 09:53:43,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6278 states to 6278 states and 9191 transitions. [2020-12-22 09:53:43,413 INFO L78 Accepts]: Start accepts. Automaton has 6278 states and 9191 transitions. Word has length 97 [2020-12-22 09:53:43,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:53:43,413 INFO L481 AbstractCegarLoop]: Abstraction has 6278 states and 9191 transitions. [2020-12-22 09:53:43,413 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:53:43,413 INFO L276 IsEmpty]: Start isEmpty. Operand 6278 states and 9191 transitions. [2020-12-22 09:53:43,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 09:53:43,415 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:43,415 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:53:43,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 09:53:43,416 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:43,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:43,416 INFO L82 PathProgramCache]: Analyzing trace with hash -300840777, now seen corresponding path program 1 times [2020-12-22 09:53:43,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:43,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235037015] [2020-12-22 09:53:43,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:43,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:43,473 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:53:43,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235037015] [2020-12-22 09:53:43,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:53:43,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:53:43,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639161099] [2020-12-22 09:53:43,475 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:53:43,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:43,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:53:43,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:53:43,475 INFO L87 Difference]: Start difference. First operand 6278 states and 9191 transitions. Second operand 3 states. [2020-12-22 09:53:43,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:53:43,646 INFO L93 Difference]: Finished difference Result 8258 states and 11975 transitions. [2020-12-22 09:53:43,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:53:43,648 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 97 [2020-12-22 09:53:43,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:53:43,652 INFO L225 Difference]: With dead ends: 8258 [2020-12-22 09:53:43,653 INFO L226 Difference]: Without dead ends: 4304 [2020-12-22 09:53:43,657 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 09:53:43,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4304 states. [2020-12-22 09:53:43,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4304 to 4302. [2020-12-22 09:53:43,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4302 states. [2020-12-22 09:53:43,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4302 states to 4302 states and 6383 transitions. [2020-12-22 09:53:43,795 INFO L78 Accepts]: Start accepts. Automaton has 4302 states and 6383 transitions. Word has length 97 [2020-12-22 09:53:43,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:53:43,796 INFO L481 AbstractCegarLoop]: Abstraction has 4302 states and 6383 transitions. [2020-12-22 09:53:43,796 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:53:43,796 INFO L276 IsEmpty]: Start isEmpty. Operand 4302 states and 6383 transitions. [2020-12-22 09:53:43,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 09:53:43,797 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:43,797 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, 1] [2020-12-22 09:53:43,797 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 09:53:43,798 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:43,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:43,798 INFO L82 PathProgramCache]: Analyzing trace with hash -387959571, now seen corresponding path program 1 times [2020-12-22 09:53:43,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:43,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97140324] [2020-12-22 09:53:43,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:43,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:44,146 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 09:53:44,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97140324] [2020-12-22 09:53:44,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66520383] [2020-12-22 09:53:44,147 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 09:53:44,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:44,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 09:53:44,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:53:44,702 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 09:53:44,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:53:44,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 4] total 16 [2020-12-22 09:53:44,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306374883] [2020-12-22 09:53:44,703 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 09:53:44,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:44,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 09:53:44,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2020-12-22 09:53:44,704 INFO L87 Difference]: Start difference. First operand 4302 states and 6383 transitions. Second operand 16 states. [2020-12-22 09:53:46,750 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2020-12-22 09:53:46,939 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2020-12-22 09:53:48,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:53:48,884 INFO L93 Difference]: Finished difference Result 15373 states and 21402 transitions. [2020-12-22 09:53:48,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-22 09:53:48,887 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 97 [2020-12-22 09:53:48,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:53:48,913 INFO L225 Difference]: With dead ends: 15373 [2020-12-22 09:53:48,913 INFO L226 Difference]: Without dead ends: 13395 [2020-12-22 09:53:48,920 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=491, Invalid=2161, Unknown=0, NotChecked=0, Total=2652 [2020-12-22 09:53:48,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13395 states. [2020-12-22 09:53:49,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13395 to 10024. [2020-12-22 09:53:49,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10024 states. [2020-12-22 09:53:49,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10024 states to 10024 states and 13945 transitions. [2020-12-22 09:53:49,650 INFO L78 Accepts]: Start accepts. Automaton has 10024 states and 13945 transitions. Word has length 97 [2020-12-22 09:53:49,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:53:49,650 INFO L481 AbstractCegarLoop]: Abstraction has 10024 states and 13945 transitions. [2020-12-22 09:53:49,650 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 09:53:49,650 INFO L276 IsEmpty]: Start isEmpty. Operand 10024 states and 13945 transitions. [2020-12-22 09:53:49,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-22 09:53:49,653 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:49,654 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, 1, 1, 1] [2020-12-22 09:53:49,869 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-22 09:53:49,870 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:49,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:49,871 INFO L82 PathProgramCache]: Analyzing trace with hash 1231715697, now seen corresponding path program 1 times [2020-12-22 09:53:49,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:49,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825258165] [2020-12-22 09:53:49,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:49,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:50,254 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:53:50,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825258165] [2020-12-22 09:53:50,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264214224] [2020-12-22 09:53:50,255 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 09:53:50,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:50,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 09:53:50,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:53:50,627 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:53:50,991 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:53:50,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:53:50,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 21 [2020-12-22 09:53:50,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070166334] [2020-12-22 09:53:50,992 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 09:53:50,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:50,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 09:53:50,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-12-22 09:53:50,993 INFO L87 Difference]: Start difference. First operand 10024 states and 13945 transitions. Second operand 22 states. [2020-12-22 09:53:53,217 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 47 [2020-12-22 09:53:56,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:53:56,298 INFO L93 Difference]: Finished difference Result 40825 states and 55011 transitions. [2020-12-22 09:53:56,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 09:53:56,299 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 98 [2020-12-22 09:53:56,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:53:56,357 INFO L225 Difference]: With dead ends: 40825 [2020-12-22 09:53:56,357 INFO L226 Difference]: Without dead ends: 34322 [2020-12-22 09:53:56,367 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=415, Invalid=1391, Unknown=0, NotChecked=0, Total=1806 [2020-12-22 09:53:56,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34322 states. [2020-12-22 09:53:58,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34322 to 22527. [2020-12-22 09:53:58,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22527 states. [2020-12-22 09:53:58,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22527 states to 22527 states and 30484 transitions. [2020-12-22 09:53:58,352 INFO L78 Accepts]: Start accepts. Automaton has 22527 states and 30484 transitions. Word has length 98 [2020-12-22 09:53:58,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:53:58,352 INFO L481 AbstractCegarLoop]: Abstraction has 22527 states and 30484 transitions. [2020-12-22 09:53:58,352 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 09:53:58,352 INFO L276 IsEmpty]: Start isEmpty. Operand 22527 states and 30484 transitions. [2020-12-22 09:53:58,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-22 09:53:58,360 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:58,360 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, 1, 1, 1] [2020-12-22 09:53:58,573 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-22 09:53:58,574 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:58,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:58,575 INFO L82 PathProgramCache]: Analyzing trace with hash -1198087855, now seen corresponding path program 1 times [2020-12-22 09:53:58,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:58,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978871346] [2020-12-22 09:53:58,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:58,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:58,852 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:53:58,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978871346] [2020-12-22 09:53:58,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169874021] [2020-12-22 09:53:58,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:53:58,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:58,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 09:53:59,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:53:59,198 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:53:59,530 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:53:59,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:53:59,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:53:59,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472471636] [2020-12-22 09:53:59,532 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:53:59,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:59,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:53:59,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:53:59,533 INFO L87 Difference]: Start difference. First operand 22527 states and 30484 transitions. Second operand 17 states. [2020-12-22 09:54:00,401 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2020-12-22 09:54:02,318 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2020-12-22 09:54:03,441 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-12-22 09:54:07,684 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-12-22 09:54:23,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:54:23,708 INFO L93 Difference]: Finished difference Result 194506 states and 257970 transitions. [2020-12-22 09:54:23,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-12-22 09:54:23,715 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 98 [2020-12-22 09:54:23,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:54:23,971 INFO L225 Difference]: With dead ends: 194506 [2020-12-22 09:54:23,971 INFO L226 Difference]: Without dead ends: 174949 [2020-12-22 09:54:24,236 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2540 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=1236, Invalid=6596, Unknown=0, NotChecked=0, Total=7832 [2020-12-22 09:54:24,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174949 states. [2020-12-22 09:54:36,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174949 to 112800. [2020-12-22 09:54:36,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112800 states. [2020-12-22 09:54:36,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112800 states to 112800 states and 147867 transitions. [2020-12-22 09:54:36,681 INFO L78 Accepts]: Start accepts. Automaton has 112800 states and 147867 transitions. Word has length 98 [2020-12-22 09:54:36,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:54:36,681 INFO L481 AbstractCegarLoop]: Abstraction has 112800 states and 147867 transitions. [2020-12-22 09:54:36,681 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:54:36,681 INFO L276 IsEmpty]: Start isEmpty. Operand 112800 states and 147867 transitions. [2020-12-22 09:54:36,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-22 09:54:36,686 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:54:36,687 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, 1, 1, 1] [2020-12-22 09:54:36,887 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-22 09:54:36,889 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:54:36,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:54:36,890 INFO L82 PathProgramCache]: Analyzing trace with hash 2130421773, now seen corresponding path program 1 times [2020-12-22 09:54:36,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:54:36,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470822974] [2020-12-22 09:54:36,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:54:37,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:54:37,232 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 09:54:37,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470822974] [2020-12-22 09:54:37,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:54:37,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:54:37,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038074943] [2020-12-22 09:54:37,234 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:54:37,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:54:37,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:54:37,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:54:37,234 INFO L87 Difference]: Start difference. First operand 112800 states and 147867 transitions. Second operand 6 states. [2020-12-22 09:54:43,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:54:43,588 INFO L93 Difference]: Finished difference Result 169219 states and 222426 transitions. [2020-12-22 09:54:43,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:54:43,589 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 98 [2020-12-22 09:54:43,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:54:43,666 INFO L225 Difference]: With dead ends: 169219 [2020-12-22 09:54:43,667 INFO L226 Difference]: Without dead ends: 58915 [2020-12-22 09:54:43,759 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 09:54:43,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58915 states. [2020-12-22 09:54:49,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58915 to 58915. [2020-12-22 09:54:49,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58915 states. [2020-12-22 09:54:49,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58915 states to 58915 states and 77532 transitions. [2020-12-22 09:54:49,893 INFO L78 Accepts]: Start accepts. Automaton has 58915 states and 77532 transitions. Word has length 98 [2020-12-22 09:54:49,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:54:49,894 INFO L481 AbstractCegarLoop]: Abstraction has 58915 states and 77532 transitions. [2020-12-22 09:54:49,894 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:54:49,894 INFO L276 IsEmpty]: Start isEmpty. Operand 58915 states and 77532 transitions. [2020-12-22 09:54:49,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-22 09:54:49,897 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:54:49,898 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, 1, 1, 1] [2020-12-22 09:54:49,898 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-12-22 09:54:49,898 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:54:49,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:54:49,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1745709901, now seen corresponding path program 1 times [2020-12-22 09:54:49,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:54:49,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398071911] [2020-12-22 09:54:49,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:54:49,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:54:49,978 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 09:54:49,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398071911] [2020-12-22 09:54:49,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:54:49,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:54:49,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931214026] [2020-12-22 09:54:49,980 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:54:49,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:54:49,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:54:49,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:54:49,981 INFO L87 Difference]: Start difference. First operand 58915 states and 77532 transitions. Second operand 6 states. [2020-12-22 09:54:55,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:54:55,186 INFO L93 Difference]: Finished difference Result 100581 states and 131975 transitions. [2020-12-22 09:54:55,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:54:55,187 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 98 [2020-12-22 09:54:55,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:54:55,228 INFO L225 Difference]: With dead ends: 100581 [2020-12-22 09:54:55,228 INFO L226 Difference]: Without dead ends: 44246 [2020-12-22 09:54:55,259 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 09:54:55,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44246 states. [2020-12-22 09:55:00,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44246 to 44246. [2020-12-22 09:55:00,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44246 states. [2020-12-22 09:55:00,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44246 states to 44246 states and 57577 transitions. [2020-12-22 09:55:00,062 INFO L78 Accepts]: Start accepts. Automaton has 44246 states and 57577 transitions. Word has length 98 [2020-12-22 09:55:00,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:55:00,062 INFO L481 AbstractCegarLoop]: Abstraction has 44246 states and 57577 transitions. [2020-12-22 09:55:00,062 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:55:00,062 INFO L276 IsEmpty]: Start isEmpty. Operand 44246 states and 57577 transitions. [2020-12-22 09:55:00,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-22 09:55:00,064 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:55:00,064 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, 1, 1, 1] [2020-12-22 09:55:00,065 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-12-22 09:55:00,065 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:55:00,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:55:00,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1530628851, now seen corresponding path program 1 times [2020-12-22 09:55:00,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:55:00,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87221879] [2020-12-22 09:55:00,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:55:00,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:55:00,154 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-22 09:55:00,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87221879] [2020-12-22 09:55:00,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:55:00,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:55:00,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547319670] [2020-12-22 09:55:00,155 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:55:00,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:55:00,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:55:00,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:55:00,156 INFO L87 Difference]: Start difference. First operand 44246 states and 57577 transitions. Second operand 6 states. [2020-12-22 09:55:07,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:55:07,944 INFO L93 Difference]: Finished difference Result 114022 states and 148276 transitions. [2020-12-22 09:55:07,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:55:07,944 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 98 [2020-12-22 09:55:07,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:55:08,016 INFO L225 Difference]: With dead ends: 114022 [2020-12-22 09:55:08,016 INFO L226 Difference]: Without dead ends: 72148 [2020-12-22 09:55:08,039 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 09:55:08,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72148 states. [2020-12-22 09:55:15,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72148 to 65074. [2020-12-22 09:55:15,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65074 states. [2020-12-22 09:55:15,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65074 states to 65074 states and 84398 transitions. [2020-12-22 09:55:15,249 INFO L78 Accepts]: Start accepts. Automaton has 65074 states and 84398 transitions. Word has length 98 [2020-12-22 09:55:15,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:55:15,250 INFO L481 AbstractCegarLoop]: Abstraction has 65074 states and 84398 transitions. [2020-12-22 09:55:15,250 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:55:15,250 INFO L276 IsEmpty]: Start isEmpty. Operand 65074 states and 84398 transitions. [2020-12-22 09:55:15,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-12-22 09:55:15,254 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:55:15,254 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, 1, 1, 1, 1] [2020-12-22 09:55:15,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-12-22 09:55:15,254 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:55:15,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:55:15,255 INFO L82 PathProgramCache]: Analyzing trace with hash -328972562, now seen corresponding path program 1 times [2020-12-22 09:55:15,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:55:15,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237913112] [2020-12-22 09:55:15,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:55:15,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:55:15,364 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-22 09:55:15,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237913112] [2020-12-22 09:55:15,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:55:15,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:55:15,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313093065] [2020-12-22 09:55:15,365 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:55:15,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:55:15,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:55:15,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:55:15,366 INFO L87 Difference]: Start difference. First operand 65074 states and 84398 transitions. Second operand 6 states. [2020-12-22 09:55:21,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:55:21,544 INFO L93 Difference]: Finished difference Result 113520 states and 146867 transitions. [2020-12-22 09:55:21,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:55:21,545 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 99 [2020-12-22 09:55:21,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:55:21,603 INFO L225 Difference]: With dead ends: 113520 [2020-12-22 09:55:21,604 INFO L226 Difference]: Without dead ends: 50828 [2020-12-22 09:55:21,628 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 09:55:21,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50828 states. [2020-12-22 09:55:27,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50828 to 50828. [2020-12-22 09:55:27,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50828 states. [2020-12-22 09:55:27,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50828 states to 50828 states and 65453 transitions. [2020-12-22 09:55:27,677 INFO L78 Accepts]: Start accepts. Automaton has 50828 states and 65453 transitions. Word has length 99 [2020-12-22 09:55:27,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:55:27,678 INFO L481 AbstractCegarLoop]: Abstraction has 50828 states and 65453 transitions. [2020-12-22 09:55:27,678 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:55:27,678 INFO L276 IsEmpty]: Start isEmpty. Operand 50828 states and 65453 transitions. [2020-12-22 09:55:27,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-12-22 09:55:27,680 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:55:27,680 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, 1, 1, 1, 1, 1] [2020-12-22 09:55:27,681 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-12-22 09:55:27,681 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:55:27,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:55:27,681 INFO L82 PathProgramCache]: Analyzing trace with hash -1888515992, now seen corresponding path program 1 times [2020-12-22 09:55:27,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:55:27,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482644909] [2020-12-22 09:55:27,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:55:27,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:55:27,991 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:55:27,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482644909] [2020-12-22 09:55:27,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50340549] [2020-12-22 09:55:27,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:55:28,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:55:28,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 09:55:28,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:55:28,494 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:55:28,795 WARN L197 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 43 [2020-12-22 09:55:29,373 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 32 [2020-12-22 09:55:29,505 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:55:29,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:55:29,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 20 [2020-12-22 09:55:29,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982494052] [2020-12-22 09:55:29,506 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 09:55:29,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:55:29,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 09:55:29,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2020-12-22 09:55:29,507 INFO L87 Difference]: Start difference. First operand 50828 states and 65453 transitions. Second operand 20 states. [2020-12-22 09:55:29,719 WARN L197 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 28 [2020-12-22 09:55:30,512 WARN L197 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 89 [2020-12-22 09:55:30,983 WARN L197 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 95 [2020-12-22 09:55:31,598 WARN L197 SmtUtils]: Spent 540.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 110 [2020-12-22 09:55:32,362 WARN L197 SmtUtils]: Spent 720.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 116 [2020-12-22 09:55:33,061 WARN L197 SmtUtils]: Spent 626.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 113 [2020-12-22 09:55:33,824 WARN L197 SmtUtils]: Spent 646.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 113 [2020-12-22 09:55:34,649 WARN L197 SmtUtils]: Spent 504.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 105 [2020-12-22 09:55:35,273 WARN L197 SmtUtils]: Spent 549.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 102 [2020-12-22 09:55:35,964 WARN L197 SmtUtils]: Spent 473.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 114 [2020-12-22 09:55:36,608 WARN L197 SmtUtils]: Spent 525.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 111 [2020-12-22 09:55:37,410 WARN L197 SmtUtils]: Spent 648.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 122 [2020-12-22 09:55:38,071 WARN L197 SmtUtils]: Spent 593.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 119 [2020-12-22 09:55:39,031 WARN L197 SmtUtils]: Spent 519.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 114 [2020-12-22 09:55:40,010 WARN L197 SmtUtils]: Spent 686.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 105 [2020-12-22 09:55:40,816 WARN L197 SmtUtils]: Spent 733.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 122 [2020-12-22 09:55:41,948 WARN L197 SmtUtils]: Spent 783.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 113 [2020-12-22 09:55:46,374 WARN L197 SmtUtils]: Spent 803.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 125 [2020-12-22 09:55:47,260 WARN L197 SmtUtils]: Spent 713.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 128 [2020-12-22 09:55:48,285 WARN L197 SmtUtils]: Spent 885.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 116 [2020-12-22 09:55:48,831 WARN L197 SmtUtils]: Spent 425.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-12-22 09:55:50,185 WARN L197 SmtUtils]: Spent 1.14 s on a formula simplification. DAG size of input: 124 DAG size of output: 119 [2020-12-22 09:55:50,717 WARN L197 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 84 [2020-12-22 09:55:51,227 WARN L197 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2020-12-22 09:55:51,735 WARN L197 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-12-22 09:55:52,251 WARN L197 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 78 [2020-12-22 09:55:52,697 WARN L197 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-12-22 09:55:53,651 WARN L197 SmtUtils]: Spent 778.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 119 [2020-12-22 09:55:54,425 WARN L197 SmtUtils]: Spent 700.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 116 [2020-12-22 09:55:55,121 WARN L197 SmtUtils]: Spent 584.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 81 [2020-12-22 09:55:55,582 WARN L197 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2020-12-22 09:55:56,930 WARN L197 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-12-22 09:55:57,460 WARN L197 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2020-12-22 09:55:58,662 WARN L197 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 121 DAG size of output: 116 [2020-12-22 09:55:59,262 WARN L197 SmtUtils]: Spent 508.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2020-12-22 09:55:59,847 WARN L197 SmtUtils]: Spent 524.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-12-22 09:56:03,812 WARN L197 SmtUtils]: Spent 824.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 108 [2020-12-22 09:56:05,643 WARN L197 SmtUtils]: Spent 691.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 117 [2020-12-22 09:56:06,624 WARN L197 SmtUtils]: Spent 843.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 125 [2020-12-22 09:56:07,148 WARN L197 SmtUtils]: Spent 431.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 84 [2020-12-22 09:56:07,631 WARN L197 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-12-22 09:56:08,434 WARN L197 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 87 [2020-12-22 09:56:08,877 WARN L197 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 84 [2020-12-22 09:56:09,559 WARN L197 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-12-22 09:56:09,856 WARN L197 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-12-22 09:56:10,584 WARN L197 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-12-22 09:56:10,878 WARN L197 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-12-22 09:56:23,817 WARN L197 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-12-22 09:56:24,078 WARN L197 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2020-12-22 09:56:24,398 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-12-22 09:56:24,946 WARN L197 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-12-22 09:56:25,214 WARN L197 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-12-22 09:56:27,845 WARN L197 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-12-22 09:56:28,443 WARN L197 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-12-22 09:56:36,089 WARN L197 SmtUtils]: Spent 477.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-12-22 09:56:36,893 WARN L197 SmtUtils]: Spent 492.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2020-12-22 09:56:43,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:56:43,679 INFO L93 Difference]: Finished difference Result 224614 states and 286985 transitions. [2020-12-22 09:56:43,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-12-22 09:56:43,681 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 100 [2020-12-22 09:56:43,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:56:44,106 INFO L225 Difference]: With dead ends: 224614 [2020-12-22 09:56:44,106 INFO L226 Difference]: Without dead ends: 180032 [2020-12-22 09:56:44,176 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2087 ImplicationChecksByTransitivity, 32.4s TimeCoverageRelationStatistics Valid=1297, Invalid=5183, Unknown=0, NotChecked=0, Total=6480 [2020-12-22 09:56:44,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180032 states.