/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 08:14:59,151 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 08:14:59,154 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 08:14:59,189 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 08:14:59,190 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 08:14:59,192 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 08:14:59,193 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 08:14:59,196 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 08:14:59,198 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 08:14:59,199 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 08:14:59,200 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 08:14:59,202 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 08:14:59,202 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 08:14:59,204 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 08:14:59,205 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 08:14:59,206 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 08:14:59,218 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 08:14:59,220 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 08:14:59,222 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 08:14:59,224 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 08:14:59,226 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 08:14:59,228 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 08:14:59,229 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 08:14:59,230 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 08:14:59,233 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 08:14:59,237 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 08:14:59,238 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 08:14:59,239 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 08:14:59,240 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 08:14:59,242 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 08:14:59,242 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 08:14:59,243 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 08:14:59,243 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 08:14:59,244 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 08:14:59,245 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 08:14:59,246 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 08:14:59,248 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 08:14:59,299 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 08:14:59,299 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 08:14:59,301 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 08:14:59,301 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 08:14:59,301 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 08:14:59,301 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 08:14:59,302 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 08:14:59,302 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 08:14:59,302 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 08:14:59,302 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 08:14:59,302 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 08:14:59,303 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 08:14:59,303 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 08:14:59,303 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 08:14:59,303 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 08:14:59,304 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 08:14:59,304 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 08:14:59,304 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 08:14:59,304 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 08:14:59,304 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 08:14:59,305 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 08:14:59,305 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 08:14:59,305 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 08:14:59,305 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 08:14:59,305 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 08:14:59,306 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 08:14:59,668 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 08:14:59,703 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 08:14:59,707 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 08:14:59,708 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 08:14:59,709 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 08:14:59,710 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-12-22 08:14:59,815 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f25ae189d/f769287a45d34f45ace093326647fe2f/FLAG8289def61 [2020-12-22 08:15:00,449 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 08:15:00,453 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-12-22 08:15:00,467 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f25ae189d/f769287a45d34f45ace093326647fe2f/FLAG8289def61 [2020-12-22 08:15:00,780 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f25ae189d/f769287a45d34f45ace093326647fe2f [2020-12-22 08:15:00,784 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 08:15:00,786 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 08:15:00,788 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 08:15:00,788 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 08:15:00,796 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 08:15:00,797 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:15:00" (1/1) ... [2020-12-22 08:15:00,799 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7bda6454 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:15:00, skipping insertion in model container [2020-12-22 08:15:00,799 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:15:00" (1/1) ... [2020-12-22 08:15:00,807 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 08:15:00,841 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 08:15:01,043 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[3969,3982] [2020-12-22 08:15:01,082 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:15:01,116 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 08:15:01,203 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[3969,3982] [2020-12-22 08:15:01,220 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:15:01,247 INFO L208 MainTranslator]: Completed translation [2020-12-22 08:15:01,248 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:15:01 WrapperNode [2020-12-22 08:15:01,248 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 08:15:01,249 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 08:15:01,250 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 08:15:01,250 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 08:15:01,262 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:15:01" (1/1) ... [2020-12-22 08:15:01,274 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:15:01" (1/1) ... [2020-12-22 08:15:01,312 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 08:15:01,313 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 08:15:01,313 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 08:15:01,313 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 08:15:01,325 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:15:01" (1/1) ... [2020-12-22 08:15:01,326 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:15:01" (1/1) ... [2020-12-22 08:15:01,329 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:15:01" (1/1) ... [2020-12-22 08:15:01,330 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:15:01" (1/1) ... [2020-12-22 08:15:01,337 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:15:01" (1/1) ... [2020-12-22 08:15:01,342 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:15:01" (1/1) ... [2020-12-22 08:15:01,345 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:15:01" (1/1) ... [2020-12-22 08:15:01,350 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 08:15:01,351 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 08:15:01,351 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 08:15:01,351 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 08:15:01,353 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:15:01" (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 08:15:01,478 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 08:15:01,478 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 08:15:01,478 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 08:15:01,478 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 08:15:02,493 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 08:15:02,494 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 08:15:02,496 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:15:02 BoogieIcfgContainer [2020-12-22 08:15:02,496 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 08:15:02,498 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 08:15:02,498 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 08:15:02,501 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 08:15:02,502 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 08:15:00" (1/3) ... [2020-12-22 08:15:02,502 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@732a8fea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:15:02, skipping insertion in model container [2020-12-22 08:15:02,503 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:15:01" (2/3) ... [2020-12-22 08:15:02,503 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@732a8fea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:15:02, skipping insertion in model container [2020-12-22 08:15:02,503 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:15:02" (3/3) ... [2020-12-22 08:15:02,505 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-12-22 08:15:02,511 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 08:15:02,517 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 08:15:02,536 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 08:15:02,564 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 08:15:02,564 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 08:15:02,564 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 08:15:02,564 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 08:15:02,565 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 08:15:02,565 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 08:15:02,565 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 08:15:02,565 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 08:15:02,582 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states. [2020-12-22 08:15:02,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 08:15:02,592 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:15:02,593 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] [2020-12-22 08:15:02,593 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:15:02,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:15:02,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1258202004, now seen corresponding path program 1 times [2020-12-22 08:15:02,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:15:02,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122885825] [2020-12-22 08:15:02,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:15:02,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:15:02,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:15:02,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122885825] [2020-12-22 08:15:02,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:15:02,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:15:02,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598593060] [2020-12-22 08:15:02,983 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:15:02,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:15:02,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:15:02,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:15:03,002 INFO L87 Difference]: Start difference. First operand 85 states. Second operand 3 states. [2020-12-22 08:15:03,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:15:03,078 INFO L93 Difference]: Finished difference Result 199 states and 318 transitions. [2020-12-22 08:15:03,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:15:03,085 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 37 [2020-12-22 08:15:03,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:15:03,106 INFO L225 Difference]: With dead ends: 199 [2020-12-22 08:15:03,106 INFO L226 Difference]: Without dead ends: 128 [2020-12-22 08:15:03,111 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:15:03,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-12-22 08:15:03,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 126. [2020-12-22 08:15:03,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-12-22 08:15:03,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 188 transitions. [2020-12-22 08:15:03,172 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 188 transitions. Word has length 37 [2020-12-22 08:15:03,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:15:03,173 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 188 transitions. [2020-12-22 08:15:03,173 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:15:03,174 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 188 transitions. [2020-12-22 08:15:03,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-22 08:15:03,176 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:15:03,176 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] [2020-12-22 08:15:03,176 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 08:15:03,177 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:15:03,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:15:03,178 INFO L82 PathProgramCache]: Analyzing trace with hash 2004783502, now seen corresponding path program 1 times [2020-12-22 08:15:03,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:15:03,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638676564] [2020-12-22 08:15:03,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:15:03,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:15:03,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:15:03,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638676564] [2020-12-22 08:15:03,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:15:03,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:15:03,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333211102] [2020-12-22 08:15:03,359 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:15:03,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:15:03,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:15:03,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:15:03,361 INFO L87 Difference]: Start difference. First operand 126 states and 188 transitions. Second operand 3 states. [2020-12-22 08:15:03,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:15:03,416 INFO L93 Difference]: Finished difference Result 306 states and 472 transitions. [2020-12-22 08:15:03,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:15:03,416 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 38 [2020-12-22 08:15:03,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:15:03,420 INFO L225 Difference]: With dead ends: 306 [2020-12-22 08:15:03,420 INFO L226 Difference]: Without dead ends: 200 [2020-12-22 08:15:03,422 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:15:03,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-12-22 08:15:03,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 198. [2020-12-22 08:15:03,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-12-22 08:15:03,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 301 transitions. [2020-12-22 08:15:03,489 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 301 transitions. Word has length 38 [2020-12-22 08:15:03,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:15:03,493 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 301 transitions. [2020-12-22 08:15:03,493 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:15:03,493 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 301 transitions. [2020-12-22 08:15:03,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-22 08:15:03,495 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:15:03,495 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] [2020-12-22 08:15:03,496 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 08:15:03,496 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:15:03,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:15:03,497 INFO L82 PathProgramCache]: Analyzing trace with hash 337157617, now seen corresponding path program 1 times [2020-12-22 08:15:03,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:15:03,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268754411] [2020-12-22 08:15:03,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:15:03,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:15:03,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:15:03,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268754411] [2020-12-22 08:15:03,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:15:03,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:15:03,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127020782] [2020-12-22 08:15:03,654 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:15:03,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:15:03,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:15:03,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:15:03,661 INFO L87 Difference]: Start difference. First operand 198 states and 301 transitions. Second operand 3 states. [2020-12-22 08:15:03,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:15:03,744 INFO L93 Difference]: Finished difference Result 490 states and 759 transitions. [2020-12-22 08:15:03,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:15:03,745 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 39 [2020-12-22 08:15:03,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:15:03,748 INFO L225 Difference]: With dead ends: 490 [2020-12-22 08:15:03,749 INFO L226 Difference]: Without dead ends: 312 [2020-12-22 08:15:03,750 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:15:03,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2020-12-22 08:15:03,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 310. [2020-12-22 08:15:03,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 310 states. [2020-12-22 08:15:03,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 473 transitions. [2020-12-22 08:15:03,825 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 473 transitions. Word has length 39 [2020-12-22 08:15:03,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:15:03,825 INFO L481 AbstractCegarLoop]: Abstraction has 310 states and 473 transitions. [2020-12-22 08:15:03,825 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:15:03,826 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 473 transitions. [2020-12-22 08:15:03,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-22 08:15:03,827 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:15:03,827 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] [2020-12-22 08:15:03,828 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 08:15:03,828 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:15:03,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:15:03,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1621587317, now seen corresponding path program 1 times [2020-12-22 08:15:03,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:15:03,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414941520] [2020-12-22 08:15:03,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:15:03,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:15:04,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:15:04,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414941520] [2020-12-22 08:15:04,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:15:04,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:15:04,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869489874] [2020-12-22 08:15:04,012 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:15:04,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:15:04,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:15:04,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:15:04,014 INFO L87 Difference]: Start difference. First operand 310 states and 473 transitions. Second operand 5 states. [2020-12-22 08:15:04,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:15:04,154 INFO L93 Difference]: Finished difference Result 1048 states and 1616 transitions. [2020-12-22 08:15:04,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:15:04,155 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 40 [2020-12-22 08:15:04,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:15:04,161 INFO L225 Difference]: With dead ends: 1048 [2020-12-22 08:15:04,161 INFO L226 Difference]: Without dead ends: 758 [2020-12-22 08:15:04,164 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:15:04,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 758 states. [2020-12-22 08:15:04,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 758 to 754. [2020-12-22 08:15:04,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 754 states. [2020-12-22 08:15:04,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 1153 transitions. [2020-12-22 08:15:04,249 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 1153 transitions. Word has length 40 [2020-12-22 08:15:04,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:15:04,249 INFO L481 AbstractCegarLoop]: Abstraction has 754 states and 1153 transitions. [2020-12-22 08:15:04,249 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:15:04,249 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 1153 transitions. [2020-12-22 08:15:04,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-22 08:15:04,251 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:15:04,252 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:15:04,252 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 08:15:04,252 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:15:04,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:15:04,253 INFO L82 PathProgramCache]: Analyzing trace with hash 696518910, now seen corresponding path program 1 times [2020-12-22 08:15:04,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:15:04,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293767015] [2020-12-22 08:15:04,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:15:04,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:15:04,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:15:04,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293767015] [2020-12-22 08:15:04,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:15:04,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:15:04,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793760596] [2020-12-22 08:15:04,348 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:15:04,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:15:04,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:15:04,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:15:04,349 INFO L87 Difference]: Start difference. First operand 754 states and 1153 transitions. Second operand 6 states. [2020-12-22 08:15:04,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:15:04,915 INFO L93 Difference]: Finished difference Result 2900 states and 4456 transitions. [2020-12-22 08:15:04,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:15:04,918 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 42 [2020-12-22 08:15:04,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:15:04,934 INFO L225 Difference]: With dead ends: 2900 [2020-12-22 08:15:04,934 INFO L226 Difference]: Without dead ends: 2166 [2020-12-22 08:15:04,937 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-12-22 08:15:04,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2166 states. [2020-12-22 08:15:05,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2166 to 2162. [2020-12-22 08:15:05,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2162 states. [2020-12-22 08:15:05,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2162 states to 2162 states and 3305 transitions. [2020-12-22 08:15:05,156 INFO L78 Accepts]: Start accepts. Automaton has 2162 states and 3305 transitions. Word has length 42 [2020-12-22 08:15:05,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:15:05,157 INFO L481 AbstractCegarLoop]: Abstraction has 2162 states and 3305 transitions. [2020-12-22 08:15:05,157 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:15:05,157 INFO L276 IsEmpty]: Start isEmpty. Operand 2162 states and 3305 transitions. [2020-12-22 08:15:05,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-22 08:15:05,159 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:15:05,159 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:15:05,159 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 08:15:05,159 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:15:05,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:15:05,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1026070499, now seen corresponding path program 1 times [2020-12-22 08:15:05,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:15:05,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600724322] [2020-12-22 08:15:05,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:15:05,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:15:05,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:15:05,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600724322] [2020-12-22 08:15:05,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:15:05,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:15:05,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738042238] [2020-12-22 08:15:05,261 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:15:05,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:15:05,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:15:05,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:15:05,262 INFO L87 Difference]: Start difference. First operand 2162 states and 3305 transitions. Second operand 5 states. [2020-12-22 08:15:05,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:15:05,919 INFO L93 Difference]: Finished difference Result 8726 states and 13357 transitions. [2020-12-22 08:15:05,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:15:05,919 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 42 [2020-12-22 08:15:05,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:15:05,956 INFO L225 Difference]: With dead ends: 8726 [2020-12-22 08:15:05,957 INFO L226 Difference]: Without dead ends: 6584 [2020-12-22 08:15:05,962 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:15:05,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6584 states. [2020-12-22 08:15:06,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6584 to 4302. [2020-12-22 08:15:06,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4302 states. [2020-12-22 08:15:06,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4302 states to 4302 states and 6445 transitions. [2020-12-22 08:15:06,388 INFO L78 Accepts]: Start accepts. Automaton has 4302 states and 6445 transitions. Word has length 42 [2020-12-22 08:15:06,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:15:06,389 INFO L481 AbstractCegarLoop]: Abstraction has 4302 states and 6445 transitions. [2020-12-22 08:15:06,389 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:15:06,389 INFO L276 IsEmpty]: Start isEmpty. Operand 4302 states and 6445 transitions. [2020-12-22 08:15:06,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 08:15:06,391 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:15:06,391 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] [2020-12-22 08:15:06,391 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 08:15:06,391 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:15:06,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:15:06,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1723958080, now seen corresponding path program 1 times [2020-12-22 08:15:06,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:15:06,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854392888] [2020-12-22 08:15:06,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:15:06,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:15:06,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:15:06,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854392888] [2020-12-22 08:15:06,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:15:06,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:15:06,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272949918] [2020-12-22 08:15:06,472 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:15:06,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:15:06,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:15:06,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:15:06,474 INFO L87 Difference]: Start difference. First operand 4302 states and 6445 transitions. Second operand 5 states. [2020-12-22 08:15:07,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:15:07,342 INFO L93 Difference]: Finished difference Result 8872 states and 13158 transitions. [2020-12-22 08:15:07,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:15:07,343 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 43 [2020-12-22 08:15:07,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:15:07,388 INFO L225 Difference]: With dead ends: 8872 [2020-12-22 08:15:07,388 INFO L226 Difference]: Without dead ends: 8870 [2020-12-22 08:15:07,393 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:15:07,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8870 states. [2020-12-22 08:15:07,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8870 to 4590. [2020-12-22 08:15:07,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4590 states. [2020-12-22 08:15:07,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4590 states to 4590 states and 6733 transitions. [2020-12-22 08:15:07,922 INFO L78 Accepts]: Start accepts. Automaton has 4590 states and 6733 transitions. Word has length 43 [2020-12-22 08:15:07,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:15:07,923 INFO L481 AbstractCegarLoop]: Abstraction has 4590 states and 6733 transitions. [2020-12-22 08:15:07,923 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:15:07,923 INFO L276 IsEmpty]: Start isEmpty. Operand 4590 states and 6733 transitions. [2020-12-22 08:15:07,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-22 08:15:07,924 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:15:07,924 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] [2020-12-22 08:15:07,925 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 08:15:07,925 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:15:07,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:15:07,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1913665939, now seen corresponding path program 1 times [2020-12-22 08:15:07,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:15:07,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501256897] [2020-12-22 08:15:07,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:15:07,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:15:07,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:15:07,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501256897] [2020-12-22 08:15:07,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:15:07,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:15:07,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879751554] [2020-12-22 08:15:07,977 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:15:07,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:15:07,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:15:07,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:15:07,978 INFO L87 Difference]: Start difference. First operand 4590 states and 6733 transitions. Second operand 3 states. [2020-12-22 08:15:08,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:15:08,554 INFO L93 Difference]: Finished difference Result 11122 states and 16319 transitions. [2020-12-22 08:15:08,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:15:08,554 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 44 [2020-12-22 08:15:08,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:15:08,590 INFO L225 Difference]: With dead ends: 11122 [2020-12-22 08:15:08,591 INFO L226 Difference]: Without dead ends: 6552 [2020-12-22 08:15:08,600 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:15:08,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6552 states. [2020-12-22 08:15:09,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6552 to 6550. [2020-12-22 08:15:09,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6550 states. [2020-12-22 08:15:09,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6550 states to 6550 states and 9545 transitions. [2020-12-22 08:15:09,315 INFO L78 Accepts]: Start accepts. Automaton has 6550 states and 9545 transitions. Word has length 44 [2020-12-22 08:15:09,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:15:09,316 INFO L481 AbstractCegarLoop]: Abstraction has 6550 states and 9545 transitions. [2020-12-22 08:15:09,316 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:15:09,316 INFO L276 IsEmpty]: Start isEmpty. Operand 6550 states and 9545 transitions. [2020-12-22 08:15:09,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-22 08:15:09,319 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:15:09,319 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 08:15:09,320 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 08:15:09,320 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:15:09,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:15:09,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1827424966, now seen corresponding path program 1 times [2020-12-22 08:15:09,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:15:09,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591357499] [2020-12-22 08:15:09,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:15:09,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:15:09,424 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 08:15:09,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591357499] [2020-12-22 08:15:09,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708584256] [2020-12-22 08:15:09,425 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 08:15:09,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:15:09,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 08:15:09,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 08:15:09,664 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 08:15:09,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 08:15:09,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 6 [2020-12-22 08:15:09,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257674834] [2020-12-22 08:15:09,666 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:15:09,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:15:09,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:15:09,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:15:09,667 INFO L87 Difference]: Start difference. First operand 6550 states and 9545 transitions. Second operand 6 states. [2020-12-22 08:15:10,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:15:10,850 INFO L93 Difference]: Finished difference Result 16122 states and 23573 transitions. [2020-12-22 08:15:10,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:15:10,850 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 61 [2020-12-22 08:15:10,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:15:10,881 INFO L225 Difference]: With dead ends: 16122 [2020-12-22 08:15:10,881 INFO L226 Difference]: Without dead ends: 11552 [2020-12-22 08:15:10,891 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:15:10,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11552 states. [2020-12-22 08:15:12,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11552 to 10782. [2020-12-22 08:15:12,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10782 states. [2020-12-22 08:15:12,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10782 states to 10782 states and 15585 transitions. [2020-12-22 08:15:12,106 INFO L78 Accepts]: Start accepts. Automaton has 10782 states and 15585 transitions. Word has length 61 [2020-12-22 08:15:12,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:15:12,107 INFO L481 AbstractCegarLoop]: Abstraction has 10782 states and 15585 transitions. [2020-12-22 08:15:12,107 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:15:12,107 INFO L276 IsEmpty]: Start isEmpty. Operand 10782 states and 15585 transitions. [2020-12-22 08:15:12,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-22 08:15:12,110 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:15:12,111 INFO L422 BasicCegarLoop]: trace histogram [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 08:15:12,324 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-22 08:15:12,325 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:15:12,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:15:12,326 INFO L82 PathProgramCache]: Analyzing trace with hash 1546173761, now seen corresponding path program 1 times [2020-12-22 08:15:12,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:15:12,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529496793] [2020-12-22 08:15:12,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:15:12,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:15:12,385 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:15:12,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529496793] [2020-12-22 08:15:12,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:15:12,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:15:12,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802258403] [2020-12-22 08:15:12,387 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:15:12,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:15:12,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:15:12,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:15:12,388 INFO L87 Difference]: Start difference. First operand 10782 states and 15585 transitions. Second operand 3 states. [2020-12-22 08:15:13,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:15:13,881 INFO L93 Difference]: Finished difference Result 24970 states and 35947 transitions. [2020-12-22 08:15:13,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:15:13,881 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 62 [2020-12-22 08:15:13,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:15:13,934 INFO L225 Difference]: With dead ends: 24970 [2020-12-22 08:15:13,934 INFO L226 Difference]: Without dead ends: 17132 [2020-12-22 08:15:13,953 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:15:13,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17132 states. [2020-12-22 08:15:15,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17132 to 17130. [2020-12-22 08:15:15,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17130 states. [2020-12-22 08:15:15,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17130 states to 17130 states and 24325 transitions. [2020-12-22 08:15:15,586 INFO L78 Accepts]: Start accepts. Automaton has 17130 states and 24325 transitions. Word has length 62 [2020-12-22 08:15:15,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:15:15,587 INFO L481 AbstractCegarLoop]: Abstraction has 17130 states and 24325 transitions. [2020-12-22 08:15:15,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:15:15,587 INFO L276 IsEmpty]: Start isEmpty. Operand 17130 states and 24325 transitions. [2020-12-22 08:15:15,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-22 08:15:15,592 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:15:15,592 INFO L422 BasicCegarLoop]: trace histogram [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 08:15:15,592 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 08:15:15,593 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:15:15,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:15:15,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1797284354, now seen corresponding path program 1 times [2020-12-22 08:15:15,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:15:15,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694787505] [2020-12-22 08:15:15,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:15:15,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:15:15,670 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 08:15:15,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694787505] [2020-12-22 08:15:15,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:15:15,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:15:15,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936865195] [2020-12-22 08:15:15,671 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:15:15,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:15:15,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:15:15,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:15:15,673 INFO L87 Difference]: Start difference. First operand 17130 states and 24325 transitions. Second operand 5 states. [2020-12-22 08:15:17,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:15:17,577 INFO L93 Difference]: Finished difference Result 32844 states and 46959 transitions. [2020-12-22 08:15:17,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:15:17,578 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 62 [2020-12-22 08:15:17,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:15:17,648 INFO L225 Difference]: With dead ends: 32844 [2020-12-22 08:15:17,648 INFO L226 Difference]: Without dead ends: 25606 [2020-12-22 08:15:17,666 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:15:17,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25606 states. [2020-12-22 08:15:19,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25606 to 23004. [2020-12-22 08:15:19,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23004 states. [2020-12-22 08:15:19,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23004 states to 23004 states and 32543 transitions. [2020-12-22 08:15:19,641 INFO L78 Accepts]: Start accepts. Automaton has 23004 states and 32543 transitions. Word has length 62 [2020-12-22 08:15:19,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:15:19,644 INFO L481 AbstractCegarLoop]: Abstraction has 23004 states and 32543 transitions. [2020-12-22 08:15:19,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:15:19,644 INFO L276 IsEmpty]: Start isEmpty. Operand 23004 states and 32543 transitions. [2020-12-22 08:15:19,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-22 08:15:19,648 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:15:19,649 INFO L422 BasicCegarLoop]: trace histogram [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 08:15:19,649 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 08:15:19,649 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:15:19,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:15:19,650 INFO L82 PathProgramCache]: Analyzing trace with hash 621000165, now seen corresponding path program 1 times [2020-12-22 08:15:19,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:15:19,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554133426] [2020-12-22 08:15:19,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:15:19,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:15:19,698 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:15:19,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554133426] [2020-12-22 08:15:19,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:15:19,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:15:19,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103300677] [2020-12-22 08:15:19,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:15:19,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:15:19,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:15:19,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:15:19,701 INFO L87 Difference]: Start difference. First operand 23004 states and 32543 transitions. Second operand 3 states. [2020-12-22 08:15:21,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:15:21,369 INFO L93 Difference]: Finished difference Result 38238 states and 53807 transitions. [2020-12-22 08:15:21,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:15:21,370 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 62 [2020-12-22 08:15:21,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:15:21,431 INFO L225 Difference]: With dead ends: 38238 [2020-12-22 08:15:21,431 INFO L226 Difference]: Without dead ends: 23835 [2020-12-22 08:15:21,457 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:15:21,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23835 states. [2020-12-22 08:15:23,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23835 to 20062. [2020-12-22 08:15:23,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20062 states. [2020-12-22 08:15:23,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20062 states to 20062 states and 27851 transitions. [2020-12-22 08:15:23,747 INFO L78 Accepts]: Start accepts. Automaton has 20062 states and 27851 transitions. Word has length 62 [2020-12-22 08:15:23,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:15:23,748 INFO L481 AbstractCegarLoop]: Abstraction has 20062 states and 27851 transitions. [2020-12-22 08:15:23,748 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:15:23,748 INFO L276 IsEmpty]: Start isEmpty. Operand 20062 states and 27851 transitions. [2020-12-22 08:15:23,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-22 08:15:23,752 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:15:23,752 INFO L422 BasicCegarLoop]: trace histogram [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 08:15:23,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 08:15:23,753 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:15:23,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:15:23,753 INFO L82 PathProgramCache]: Analyzing trace with hash -922232594, now seen corresponding path program 1 times [2020-12-22 08:15:23,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:15:23,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437017823] [2020-12-22 08:15:23,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:15:23,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:15:23,824 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 08:15:23,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437017823] [2020-12-22 08:15:23,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:15:23,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:15:23,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884482640] [2020-12-22 08:15:23,826 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:15:23,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:15:23,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:15:23,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:15:23,827 INFO L87 Difference]: Start difference. First operand 20062 states and 27851 transitions. Second operand 6 states. [2020-12-22 08:15:27,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:15:27,638 INFO L93 Difference]: Finished difference Result 68107 states and 94112 transitions. [2020-12-22 08:15:27,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:15:27,639 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 62 [2020-12-22 08:15:27,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:15:27,740 INFO L225 Difference]: With dead ends: 68107 [2020-12-22 08:15:27,741 INFO L226 Difference]: Without dead ends: 48110 [2020-12-22 08:15:27,780 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-12-22 08:15:27,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48110 states. [2020-12-22 08:15:31,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48110 to 47684. [2020-12-22 08:15:31,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47684 states. [2020-12-22 08:15:31,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47684 states to 47684 states and 65549 transitions. [2020-12-22 08:15:31,500 INFO L78 Accepts]: Start accepts. Automaton has 47684 states and 65549 transitions. Word has length 62 [2020-12-22 08:15:31,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:15:31,501 INFO L481 AbstractCegarLoop]: Abstraction has 47684 states and 65549 transitions. [2020-12-22 08:15:31,501 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:15:31,501 INFO L276 IsEmpty]: Start isEmpty. Operand 47684 states and 65549 transitions. [2020-12-22 08:15:31,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-22 08:15:31,506 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:15:31,506 INFO L422 BasicCegarLoop]: trace histogram [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 08:15:31,507 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 08:15:31,507 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:15:31,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:15:31,507 INFO L82 PathProgramCache]: Analyzing trace with hash 695272297, now seen corresponding path program 1 times [2020-12-22 08:15:31,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:15:31,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002020176] [2020-12-22 08:15:31,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:15:31,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:15:31,590 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 08:15:31,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002020176] [2020-12-22 08:15:31,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:15:31,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:15:31,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691186586] [2020-12-22 08:15:31,591 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:15:31,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:15:31,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:15:31,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:15:31,592 INFO L87 Difference]: Start difference. First operand 47684 states and 65549 transitions. Second operand 5 states. [2020-12-22 08:15:35,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:15:35,898 INFO L93 Difference]: Finished difference Result 71761 states and 99653 transitions. [2020-12-22 08:15:35,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:15:35,901 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 62 [2020-12-22 08:15:35,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:15:36,053 INFO L225 Difference]: With dead ends: 71761 [2020-12-22 08:15:36,053 INFO L226 Difference]: Without dead ends: 64323 [2020-12-22 08:15:36,076 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:15:36,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64323 states. [2020-12-22 08:15:39,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64323 to 54832. [2020-12-22 08:15:39,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54832 states. [2020-12-22 08:15:40,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54832 states to 54832 states and 75441 transitions. [2020-12-22 08:15:40,071 INFO L78 Accepts]: Start accepts. Automaton has 54832 states and 75441 transitions. Word has length 62 [2020-12-22 08:15:40,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:15:40,071 INFO L481 AbstractCegarLoop]: Abstraction has 54832 states and 75441 transitions. [2020-12-22 08:15:40,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:15:40,071 INFO L276 IsEmpty]: Start isEmpty. Operand 54832 states and 75441 transitions. [2020-12-22 08:15:40,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-22 08:15:40,076 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:15:40,077 INFO L422 BasicCegarLoop]: trace histogram [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 08:15:40,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 08:15:40,077 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:15:40,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:15:40,078 INFO L82 PathProgramCache]: Analyzing trace with hash -237073659, now seen corresponding path program 1 times [2020-12-22 08:15:40,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:15:40,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353579572] [2020-12-22 08:15:40,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:15:40,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:15:40,163 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 08:15:40,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353579572] [2020-12-22 08:15:40,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:15:40,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:15:40,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847998053] [2020-12-22 08:15:40,165 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:15:40,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:15:40,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:15:40,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:15:40,166 INFO L87 Difference]: Start difference. First operand 54832 states and 75441 transitions. Second operand 5 states. [2020-12-22 08:15:44,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:15:44,851 INFO L93 Difference]: Finished difference Result 81327 states and 112952 transitions. [2020-12-22 08:15:44,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:15:44,852 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 62 [2020-12-22 08:15:44,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:15:44,942 INFO L225 Difference]: With dead ends: 81327 [2020-12-22 08:15:44,942 INFO L226 Difference]: Without dead ends: 69390 [2020-12-22 08:15:44,965 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:15:45,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69390 states. [2020-12-22 08:15:49,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69390 to 64196. [2020-12-22 08:15:49,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64196 states. [2020-12-22 08:15:49,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64196 states to 64196 states and 88097 transitions. [2020-12-22 08:15:49,899 INFO L78 Accepts]: Start accepts. Automaton has 64196 states and 88097 transitions. Word has length 62 [2020-12-22 08:15:49,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:15:49,900 INFO L481 AbstractCegarLoop]: Abstraction has 64196 states and 88097 transitions. [2020-12-22 08:15:49,900 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:15:49,900 INFO L276 IsEmpty]: Start isEmpty. Operand 64196 states and 88097 transitions. [2020-12-22 08:15:49,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 08:15:49,907 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:15:49,907 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:15:49,907 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 08:15:49,907 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:15:49,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:15:49,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1807529145, now seen corresponding path program 1 times [2020-12-22 08:15:49,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:15:49,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779248705] [2020-12-22 08:15:49,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:15:49,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:15:49,955 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:15:49,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779248705] [2020-12-22 08:15:49,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:15:49,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:15:49,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140355453] [2020-12-22 08:15:49,957 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:15:49,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:15:49,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:15:49,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:15:49,958 INFO L87 Difference]: Start difference. First operand 64196 states and 88097 transitions. Second operand 3 states. [2020-12-22 08:15:56,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:15:56,882 INFO L93 Difference]: Finished difference Result 141599 states and 193891 transitions. [2020-12-22 08:15:56,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:15:56,883 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2020-12-22 08:15:56,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:15:57,020 INFO L225 Difference]: With dead ends: 141599 [2020-12-22 08:15:57,020 INFO L226 Difference]: Without dead ends: 84266 [2020-12-22 08:15:57,068 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:15:57,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84266 states. [2020-12-22 08:16:03,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84266 to 80711. [2020-12-22 08:16:03,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80711 states. [2020-12-22 08:16:03,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80711 states to 80711 states and 109057 transitions. [2020-12-22 08:16:03,327 INFO L78 Accepts]: Start accepts. Automaton has 80711 states and 109057 transitions. Word has length 65 [2020-12-22 08:16:03,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:16:03,327 INFO L481 AbstractCegarLoop]: Abstraction has 80711 states and 109057 transitions. [2020-12-22 08:16:03,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:16:03,327 INFO L276 IsEmpty]: Start isEmpty. Operand 80711 states and 109057 transitions. [2020-12-22 08:16:03,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 08:16:03,336 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:16:03,336 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 08:16:03,336 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 08:16:03,336 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:16:03,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:16:03,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1698199029, now seen corresponding path program 1 times [2020-12-22 08:16:03,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:16:03,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236756494] [2020-12-22 08:16:03,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:16:03,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:16:03,427 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:16:03,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236756494] [2020-12-22 08:16:03,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922591679] [2020-12-22 08:16:03,428 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 08:16:03,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:16:03,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 08:16:03,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 08:16:03,719 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:16:03,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 08:16:03,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-12-22 08:16:03,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203537682] [2020-12-22 08:16:03,721 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 08:16:03,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:16:03,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 08:16:03,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-12-22 08:16:03,722 INFO L87 Difference]: Start difference. First operand 80711 states and 109057 transitions. Second operand 11 states. [2020-12-22 08:16:18,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:16:18,573 INFO L93 Difference]: Finished difference Result 229924 states and 310323 transitions. [2020-12-22 08:16:18,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 08:16:18,574 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 67 [2020-12-22 08:16:18,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:16:18,859 INFO L225 Difference]: With dead ends: 229924 [2020-12-22 08:16:18,859 INFO L226 Difference]: Without dead ends: 170875 [2020-12-22 08:16:18,923 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2020-12-22 08:16:19,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170875 states. [2020-12-22 08:16:27,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170875 to 93967. [2020-12-22 08:16:27,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93967 states. [2020-12-22 08:16:27,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93967 states to 93967 states and 127026 transitions. [2020-12-22 08:16:27,626 INFO L78 Accepts]: Start accepts. Automaton has 93967 states and 127026 transitions. Word has length 67 [2020-12-22 08:16:27,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:16:27,626 INFO L481 AbstractCegarLoop]: Abstraction has 93967 states and 127026 transitions. [2020-12-22 08:16:27,626 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 08:16:27,627 INFO L276 IsEmpty]: Start isEmpty. Operand 93967 states and 127026 transitions. [2020-12-22 08:16:27,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 08:16:27,634 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:16:27,634 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 08:16:27,847 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 08:16:27,848 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:16:27,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:16:27,849 INFO L82 PathProgramCache]: Analyzing trace with hash -929496895, now seen corresponding path program 1 times [2020-12-22 08:16:27,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:16:27,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267384458] [2020-12-22 08:16:27,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:16:27,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:16:27,939 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:16:27,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267384458] [2020-12-22 08:16:27,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222896013] [2020-12-22 08:16:27,942 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 08:16:28,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:16:28,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 08:16:28,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 08:16:28,278 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:16:28,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 08:16:28,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-12-22 08:16:28,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760711018] [2020-12-22 08:16:28,281 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 08:16:28,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:16:28,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 08:16:28,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-12-22 08:16:28,283 INFO L87 Difference]: Start difference. First operand 93967 states and 127026 transitions. Second operand 11 states. [2020-12-22 08:16:40,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:16:40,721 INFO L93 Difference]: Finished difference Result 193539 states and 259994 transitions. [2020-12-22 08:16:40,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 08:16:40,721 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 67 [2020-12-22 08:16:40,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:16:41,131 INFO L225 Difference]: With dead ends: 193539 [2020-12-22 08:16:41,131 INFO L226 Difference]: Without dead ends: 123755 [2020-12-22 08:16:41,189 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2020-12-22 08:16:41,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123755 states. [2020-12-22 08:16:50,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123755 to 93849. [2020-12-22 08:16:50,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93849 states. [2020-12-22 08:16:50,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93849 states to 93849 states and 126196 transitions. [2020-12-22 08:16:50,373 INFO L78 Accepts]: Start accepts. Automaton has 93849 states and 126196 transitions. Word has length 67 [2020-12-22 08:16:50,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:16:50,373 INFO L481 AbstractCegarLoop]: Abstraction has 93849 states and 126196 transitions. [2020-12-22 08:16:50,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 08:16:50,374 INFO L276 IsEmpty]: Start isEmpty. Operand 93849 states and 126196 transitions. [2020-12-22 08:16:50,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 08:16:50,379 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:16:50,379 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 08:16:50,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 08:16:50,580 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:16:50,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:16:50,581 INFO L82 PathProgramCache]: Analyzing trace with hash -2073252700, now seen corresponding path program 1 times [2020-12-22 08:16:50,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:16:50,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242945195] [2020-12-22 08:16:50,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:16:50,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:16:50,949 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:16:50,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242945195] [2020-12-22 08:16:50,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554967806] [2020-12-22 08:16:50,953 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 08:16:51,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:16:51,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 08:16:51,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 08:16:51,249 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:16:51,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 08:16:51,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-12-22 08:16:51,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656724692] [2020-12-22 08:16:51,250 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 08:16:51,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:16:51,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 08:16:51,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-12-22 08:16:51,251 INFO L87 Difference]: Start difference. First operand 93849 states and 126196 transitions. Second operand 11 states.