/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.2.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 09:06:22,678 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 09:06:22,682 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 09:06:22,738 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 09:06:22,739 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 09:06:22,743 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 09:06:22,746 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 09:06:22,754 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 09:06:22,757 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 09:06:22,763 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 09:06:22,764 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 09:06:22,765 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 09:06:22,766 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 09:06:22,769 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 09:06:22,771 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 09:06:22,773 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 09:06:22,774 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 09:06:22,778 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 09:06:22,785 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 09:06:22,803 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 09:06:22,805 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 09:06:22,807 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 09:06:22,808 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 09:06:22,810 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 09:06:22,813 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 09:06:22,828 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 09:06:22,828 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 09:06:22,829 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 09:06:22,835 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 09:06:22,882 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 09:06:22,884 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 09:06:22,886 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 09:06:22,886 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 09:06:22,887 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 09:06:22,887 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 09:06:22,889 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 09:06:22,889 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 09:06:22,889 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 09:06:22,890 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 09:06:22,891 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 09:06:22,891 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 09:06:22,891 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 09:06:22,892 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 09:06:22,892 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 09:06:22,892 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 09:06:22,892 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 09:06:22,892 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:06:22,892 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 09:06:22,893 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 09:06:22,893 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 09:06:22,893 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 09:06:22,893 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 09:06:22,894 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 09:06:22,894 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 09:06:22,894 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 09:06:23,274 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 09:06:23,300 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 09:06:23,303 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 09:06:23,305 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 09:06:23,305 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 09:06:23,306 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.2.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2020-12-22 09:06:23,380 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/948ddfffe/160678e9f15246b2bbf1b6bfa1951ce2/FLAGbe6a74947 [2020-12-22 09:06:24,227 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 09:06:24,228 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.2.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2020-12-22 09:06:24,254 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/948ddfffe/160678e9f15246b2bbf1b6bfa1951ce2/FLAGbe6a74947 [2020-12-22 09:06:24,481 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/948ddfffe/160678e9f15246b2bbf1b6bfa1951ce2 [2020-12-22 09:06:24,485 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 09:06:24,489 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 09:06:24,494 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 09:06:24,494 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 09:06:24,499 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 09:06:24,501 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:06:24" (1/1) ... [2020-12-22 09:06:24,503 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ebfb49d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:06:24, skipping insertion in model container [2020-12-22 09:06:24,503 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:06:24" (1/1) ... [2020-12-22 09:06:24,513 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 09:06:24,599 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 09:06:25,043 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_opt-floodmax.4.2.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c[13270,13283] [2020-12-22 09:06:25,210 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:06:25,236 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 09:06:25,381 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.2.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c[13270,13283] [2020-12-22 09:06:25,480 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:06:25,509 INFO L208 MainTranslator]: Completed translation [2020-12-22 09:06:25,510 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:06:25 WrapperNode [2020-12-22 09:06:25,510 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 09:06:25,521 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 09:06:25,521 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 09:06:25,521 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 09:06:25,530 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:06:25" (1/1) ... [2020-12-22 09:06:25,570 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:06:25" (1/1) ... [2020-12-22 09:06:25,635 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 09:06:25,636 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 09:06:25,636 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 09:06:25,636 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 09:06:25,646 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:06:25" (1/1) ... [2020-12-22 09:06:25,646 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:06:25" (1/1) ... [2020-12-22 09:06:25,651 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:06:25" (1/1) ... [2020-12-22 09:06:25,652 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:06:25" (1/1) ... [2020-12-22 09:06:25,674 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:06:25" (1/1) ... [2020-12-22 09:06:25,704 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:06:25" (1/1) ... [2020-12-22 09:06:25,713 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:06:25" (1/1) ... [2020-12-22 09:06:25,729 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 09:06:25,730 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 09:06:25,730 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 09:06:25,730 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 09:06:25,731 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:06:25" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:06:25,836 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 09:06:25,837 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 09:06:25,837 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 09:06:25,837 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 09:06:27,097 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 09:06:27,098 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 09:06:27,100 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:06:27 BoogieIcfgContainer [2020-12-22 09:06:27,101 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 09:06:27,103 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 09:06:27,103 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 09:06:27,107 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 09:06:27,107 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:06:24" (1/3) ... [2020-12-22 09:06:27,108 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b25b0e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:06:27, skipping insertion in model container [2020-12-22 09:06:27,108 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:06:25" (2/3) ... [2020-12-22 09:06:27,109 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b25b0e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:06:27, skipping insertion in model container [2020-12-22 09:06:27,109 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:06:27" (3/3) ... [2020-12-22 09:06:27,111 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.2.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2020-12-22 09:06:27,118 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 09:06:27,124 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 09:06:27,145 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 09:06:27,177 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 09:06:27,177 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 09:06:27,177 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 09:06:27,177 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 09:06:27,177 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 09:06:27,178 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 09:06:27,178 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 09:06:27,178 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 09:06:27,203 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states. [2020-12-22 09:06:27,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-12-22 09:06:27,241 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:06:27,242 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:06:27,242 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:06:27,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:06:27,250 INFO L82 PathProgramCache]: Analyzing trace with hash 1594884720, now seen corresponding path program 1 times [2020-12-22 09:06:27,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:06:27,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209733585] [2020-12-22 09:06:27,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:06:27,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:06:27,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:06:27,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209733585] [2020-12-22 09:06:27,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:06:27,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:06:27,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424101322] [2020-12-22 09:06:27,870 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:06:27,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:06:27,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:06:27,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:06:27,893 INFO L87 Difference]: Start difference. First operand 342 states. Second operand 3 states. [2020-12-22 09:06:28,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:06:28,052 INFO L93 Difference]: Finished difference Result 628 states and 1091 transitions. [2020-12-22 09:06:28,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:06:28,053 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 118 [2020-12-22 09:06:28,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:06:28,073 INFO L225 Difference]: With dead ends: 628 [2020-12-22 09:06:28,074 INFO L226 Difference]: Without dead ends: 473 [2020-12-22 09:06:28,078 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:06:28,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2020-12-22 09:06:28,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 471. [2020-12-22 09:06:28,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 471 states. [2020-12-22 09:06:28,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 779 transitions. [2020-12-22 09:06:28,185 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 779 transitions. Word has length 118 [2020-12-22 09:06:28,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:06:28,186 INFO L481 AbstractCegarLoop]: Abstraction has 471 states and 779 transitions. [2020-12-22 09:06:28,186 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:06:28,186 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 779 transitions. [2020-12-22 09:06:28,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-12-22 09:06:28,192 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:06:28,192 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:06:28,192 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 09:06:28,192 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:06:28,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:06:28,194 INFO L82 PathProgramCache]: Analyzing trace with hash -910979864, now seen corresponding path program 1 times [2020-12-22 09:06:28,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:06:28,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804387099] [2020-12-22 09:06:28,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:06:28,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:06:28,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:06:28,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804387099] [2020-12-22 09:06:28,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:06:28,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:06:28,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084087873] [2020-12-22 09:06:28,513 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:06:28,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:06:28,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:06:28,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:06:28,514 INFO L87 Difference]: Start difference. First operand 471 states and 779 transitions. Second operand 3 states. [2020-12-22 09:06:28,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:06:28,585 INFO L93 Difference]: Finished difference Result 1007 states and 1675 transitions. [2020-12-22 09:06:28,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:06:28,586 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 121 [2020-12-22 09:06:28,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:06:28,592 INFO L225 Difference]: With dead ends: 1007 [2020-12-22 09:06:28,592 INFO L226 Difference]: Without dead ends: 729 [2020-12-22 09:06:28,595 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:06:28,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 729 states. [2020-12-22 09:06:28,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 729 to 727. [2020-12-22 09:06:28,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 727 states. [2020-12-22 09:06:28,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 727 states to 727 states and 1206 transitions. [2020-12-22 09:06:28,658 INFO L78 Accepts]: Start accepts. Automaton has 727 states and 1206 transitions. Word has length 121 [2020-12-22 09:06:28,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:06:28,659 INFO L481 AbstractCegarLoop]: Abstraction has 727 states and 1206 transitions. [2020-12-22 09:06:28,659 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:06:28,659 INFO L276 IsEmpty]: Start isEmpty. Operand 727 states and 1206 transitions. [2020-12-22 09:06:28,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-12-22 09:06:28,667 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:06:28,668 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:06:28,668 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 09:06:28,668 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:06:28,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:06:28,670 INFO L82 PathProgramCache]: Analyzing trace with hash -195863697, now seen corresponding path program 1 times [2020-12-22 09:06:28,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:06:28,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490272512] [2020-12-22 09:06:28,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:06:28,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:06:28,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:06:28,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490272512] [2020-12-22 09:06:28,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:06:28,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:06:28,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062108273] [2020-12-22 09:06:28,872 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:06:28,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:06:28,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:06:28,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:06:28,891 INFO L87 Difference]: Start difference. First operand 727 states and 1206 transitions. Second operand 3 states. [2020-12-22 09:06:28,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:06:28,992 INFO L93 Difference]: Finished difference Result 1755 states and 2920 transitions. [2020-12-22 09:06:28,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:06:28,993 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 124 [2020-12-22 09:06:28,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:06:29,007 INFO L225 Difference]: With dead ends: 1755 [2020-12-22 09:06:29,007 INFO L226 Difference]: Without dead ends: 1221 [2020-12-22 09:06:29,012 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:06:29,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1221 states. [2020-12-22 09:06:29,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1221 to 1219. [2020-12-22 09:06:29,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1219 states. [2020-12-22 09:06:29,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1219 states to 1219 states and 2022 transitions. [2020-12-22 09:06:29,120 INFO L78 Accepts]: Start accepts. Automaton has 1219 states and 2022 transitions. Word has length 124 [2020-12-22 09:06:29,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:06:29,129 INFO L481 AbstractCegarLoop]: Abstraction has 1219 states and 2022 transitions. [2020-12-22 09:06:29,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:06:29,131 INFO L276 IsEmpty]: Start isEmpty. Operand 1219 states and 2022 transitions. [2020-12-22 09:06:29,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-12-22 09:06:29,137 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:06:29,138 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:06:29,138 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 09:06:29,139 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:06:29,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:06:29,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1851247163, now seen corresponding path program 1 times [2020-12-22 09:06:29,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:06:29,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867809381] [2020-12-22 09:06:29,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:06:29,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:06:29,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:06:29,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867809381] [2020-12-22 09:06:29,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:06:29,392 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:06:29,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724763968] [2020-12-22 09:06:29,392 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:06:29,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:06:29,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:06:29,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:06:29,394 INFO L87 Difference]: Start difference. First operand 1219 states and 2022 transitions. Second operand 3 states. [2020-12-22 09:06:29,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:06:29,493 INFO L93 Difference]: Finished difference Result 3191 states and 5296 transitions. [2020-12-22 09:06:29,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:06:29,493 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 127 [2020-12-22 09:06:29,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:06:29,508 INFO L225 Difference]: With dead ends: 3191 [2020-12-22 09:06:29,509 INFO L226 Difference]: Without dead ends: 2165 [2020-12-22 09:06:29,512 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:06:29,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2165 states. [2020-12-22 09:06:29,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2165 to 2163. [2020-12-22 09:06:29,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2163 states. [2020-12-22 09:06:29,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2163 states to 2163 states and 3578 transitions. [2020-12-22 09:06:29,616 INFO L78 Accepts]: Start accepts. Automaton has 2163 states and 3578 transitions. Word has length 127 [2020-12-22 09:06:29,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:06:29,617 INFO L481 AbstractCegarLoop]: Abstraction has 2163 states and 3578 transitions. [2020-12-22 09:06:29,617 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:06:29,617 INFO L276 IsEmpty]: Start isEmpty. Operand 2163 states and 3578 transitions. [2020-12-22 09:06:29,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-22 09:06:29,625 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:06:29,625 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:06:29,625 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 09:06:29,625 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:06:29,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:06:29,626 INFO L82 PathProgramCache]: Analyzing trace with hash -559497898, now seen corresponding path program 1 times [2020-12-22 09:06:29,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:06:29,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64976342] [2020-12-22 09:06:29,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:06:29,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:06:30,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:06:30,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64976342] [2020-12-22 09:06:30,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:06:30,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:06:30,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915612445] [2020-12-22 09:06:30,032 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:06:30,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:06:30,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:06:30,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:06:30,035 INFO L87 Difference]: Start difference. First operand 2163 states and 3578 transitions. Second operand 6 states. [2020-12-22 09:06:30,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:06:30,809 INFO L93 Difference]: Finished difference Result 11283 states and 18810 transitions. [2020-12-22 09:06:30,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 09:06:30,811 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 130 [2020-12-22 09:06:30,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:06:30,862 INFO L225 Difference]: With dead ends: 11283 [2020-12-22 09:06:30,863 INFO L226 Difference]: Without dead ends: 9313 [2020-12-22 09:06:30,871 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:06:30,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9313 states. [2020-12-22 09:06:31,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9313 to 4001. [2020-12-22 09:06:31,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4001 states. [2020-12-22 09:06:31,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4001 states to 4001 states and 6621 transitions. [2020-12-22 09:06:31,270 INFO L78 Accepts]: Start accepts. Automaton has 4001 states and 6621 transitions. Word has length 130 [2020-12-22 09:06:31,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:06:31,270 INFO L481 AbstractCegarLoop]: Abstraction has 4001 states and 6621 transitions. [2020-12-22 09:06:31,270 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:06:31,271 INFO L276 IsEmpty]: Start isEmpty. Operand 4001 states and 6621 transitions. [2020-12-22 09:06:31,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-12-22 09:06:31,275 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:06:31,275 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:06:31,275 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 09:06:31,276 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:06:31,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:06:31,276 INFO L82 PathProgramCache]: Analyzing trace with hash -231627666, now seen corresponding path program 1 times [2020-12-22 09:06:31,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:06:31,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828072184] [2020-12-22 09:06:31,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:06:31,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:06:31,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:06:31,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828072184] [2020-12-22 09:06:31,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:06:31,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:06:31,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171299909] [2020-12-22 09:06:31,395 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:06:31,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:06:31,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:06:31,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:06:31,397 INFO L87 Difference]: Start difference. First operand 4001 states and 6621 transitions. Second operand 4 states. [2020-12-22 09:06:31,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:06:31,944 INFO L93 Difference]: Finished difference Result 11713 states and 19481 transitions. [2020-12-22 09:06:31,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:06:31,944 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 131 [2020-12-22 09:06:31,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:06:31,991 INFO L225 Difference]: With dead ends: 11713 [2020-12-22 09:06:31,992 INFO L226 Difference]: Without dead ends: 7905 [2020-12-22 09:06:31,999 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:06:32,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7905 states. [2020-12-22 09:06:32,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7905 to 5936. [2020-12-22 09:06:32,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5936 states. [2020-12-22 09:06:32,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5936 states to 5936 states and 9836 transitions. [2020-12-22 09:06:32,552 INFO L78 Accepts]: Start accepts. Automaton has 5936 states and 9836 transitions. Word has length 131 [2020-12-22 09:06:32,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:06:32,553 INFO L481 AbstractCegarLoop]: Abstraction has 5936 states and 9836 transitions. [2020-12-22 09:06:32,553 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:06:32,553 INFO L276 IsEmpty]: Start isEmpty. Operand 5936 states and 9836 transitions. [2020-12-22 09:06:32,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-12-22 09:06:32,559 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:06:32,560 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:06:32,560 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 09:06:32,560 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:06:32,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:06:32,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1540206583, now seen corresponding path program 1 times [2020-12-22 09:06:32,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:06:32,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498191619] [2020-12-22 09:06:32,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:06:32,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:06:32,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:06:32,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498191619] [2020-12-22 09:06:32,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:06:32,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:06:32,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992784712] [2020-12-22 09:06:32,692 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:06:32,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:06:32,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:06:32,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:06:32,693 INFO L87 Difference]: Start difference. First operand 5936 states and 9836 transitions. Second operand 3 states. [2020-12-22 09:06:33,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:06:33,293 INFO L93 Difference]: Finished difference Result 13025 states and 21678 transitions. [2020-12-22 09:06:33,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:06:33,294 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 132 [2020-12-22 09:06:33,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:06:33,336 INFO L225 Difference]: With dead ends: 13025 [2020-12-22 09:06:33,337 INFO L226 Difference]: Without dead ends: 9024 [2020-12-22 09:06:33,346 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:06:33,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9024 states. [2020-12-22 09:06:33,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9024 to 9022. [2020-12-22 09:06:33,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9022 states. [2020-12-22 09:06:33,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9022 states to 9022 states and 14950 transitions. [2020-12-22 09:06:33,915 INFO L78 Accepts]: Start accepts. Automaton has 9022 states and 14950 transitions. Word has length 132 [2020-12-22 09:06:33,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:06:33,916 INFO L481 AbstractCegarLoop]: Abstraction has 9022 states and 14950 transitions. [2020-12-22 09:06:33,916 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:06:33,916 INFO L276 IsEmpty]: Start isEmpty. Operand 9022 states and 14950 transitions. [2020-12-22 09:06:33,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-12-22 09:06:33,919 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:06:33,919 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:06:33,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 09:06:33,919 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:06:33,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:06:33,920 INFO L82 PathProgramCache]: Analyzing trace with hash 579129211, now seen corresponding path program 1 times [2020-12-22 09:06:33,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:06:33,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458064127] [2020-12-22 09:06:33,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:06:33,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:06:34,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:06:34,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458064127] [2020-12-22 09:06:34,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:06:34,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:06:34,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189344706] [2020-12-22 09:06:34,073 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:06:34,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:06:34,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:06:34,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:06:34,074 INFO L87 Difference]: Start difference. First operand 9022 states and 14950 transitions. Second operand 3 states. [2020-12-22 09:06:34,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:06:34,875 INFO L93 Difference]: Finished difference Result 17368 states and 28819 transitions. [2020-12-22 09:06:34,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:06:34,876 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 132 [2020-12-22 09:06:34,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:06:34,909 INFO L225 Difference]: With dead ends: 17368 [2020-12-22 09:06:34,910 INFO L226 Difference]: Without dead ends: 12606 [2020-12-22 09:06:34,921 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:06:34,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12606 states. [2020-12-22 09:06:35,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12606 to 12604. [2020-12-22 09:06:35,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12604 states. [2020-12-22 09:06:35,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12604 states to 12604 states and 20840 transitions. [2020-12-22 09:06:35,760 INFO L78 Accepts]: Start accepts. Automaton has 12604 states and 20840 transitions. Word has length 132 [2020-12-22 09:06:35,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:06:35,760 INFO L481 AbstractCegarLoop]: Abstraction has 12604 states and 20840 transitions. [2020-12-22 09:06:35,760 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:06:35,761 INFO L276 IsEmpty]: Start isEmpty. Operand 12604 states and 20840 transitions. [2020-12-22 09:06:35,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-12-22 09:06:35,763 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:06:35,763 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:06:35,763 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 09:06:35,763 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:06:35,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:06:35,764 INFO L82 PathProgramCache]: Analyzing trace with hash 1676490411, now seen corresponding path program 1 times [2020-12-22 09:06:35,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:06:35,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799110980] [2020-12-22 09:06:35,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:06:35,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:06:35,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:06:35,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799110980] [2020-12-22 09:06:35,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:06:35,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:06:35,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764835482] [2020-12-22 09:06:35,863 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:06:35,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:06:35,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:06:35,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:06:35,864 INFO L87 Difference]: Start difference. First operand 12604 states and 20840 transitions. Second operand 3 states. [2020-12-22 09:06:36,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:06:36,758 INFO L93 Difference]: Finished difference Result 24110 states and 39925 transitions. [2020-12-22 09:06:36,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:06:36,759 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 132 [2020-12-22 09:06:36,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:06:36,803 INFO L225 Difference]: With dead ends: 24110 [2020-12-22 09:06:36,803 INFO L226 Difference]: Without dead ends: 17468 [2020-12-22 09:06:36,891 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:06:36,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17468 states. [2020-12-22 09:06:37,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17468 to 17466. [2020-12-22 09:06:37,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17466 states. [2020-12-22 09:06:37,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17466 states to 17466 states and 28808 transitions. [2020-12-22 09:06:37,887 INFO L78 Accepts]: Start accepts. Automaton has 17466 states and 28808 transitions. Word has length 132 [2020-12-22 09:06:37,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:06:37,887 INFO L481 AbstractCegarLoop]: Abstraction has 17466 states and 28808 transitions. [2020-12-22 09:06:37,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:06:37,888 INFO L276 IsEmpty]: Start isEmpty. Operand 17466 states and 28808 transitions. [2020-12-22 09:06:37,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-12-22 09:06:37,889 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:06:37,890 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:06:37,890 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 09:06:37,890 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:06:37,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:06:37,891 INFO L82 PathProgramCache]: Analyzing trace with hash 1346972957, now seen corresponding path program 1 times [2020-12-22 09:06:37,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:06:37,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922336131] [2020-12-22 09:06:37,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:06:37,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:06:38,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:06:38,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922336131] [2020-12-22 09:06:38,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:06:38,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:06:38,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483477360] [2020-12-22 09:06:38,075 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:06:38,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:06:38,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:06:38,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:06:38,076 INFO L87 Difference]: Start difference. First operand 17466 states and 28808 transitions. Second operand 4 states. [2020-12-22 09:06:39,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:06:39,939 INFO L93 Difference]: Finished difference Result 56537 states and 93383 transitions. [2020-12-22 09:06:39,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:06:39,939 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 132 [2020-12-22 09:06:39,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:06:40,038 INFO L225 Difference]: With dead ends: 56537 [2020-12-22 09:06:40,038 INFO L226 Difference]: Without dead ends: 39310 [2020-12-22 09:06:40,064 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:06:40,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39310 states. [2020-12-22 09:06:41,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39310 to 28329. [2020-12-22 09:06:41,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28329 states. [2020-12-22 09:06:41,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28329 states to 28329 states and 46597 transitions. [2020-12-22 09:06:41,706 INFO L78 Accepts]: Start accepts. Automaton has 28329 states and 46597 transitions. Word has length 132 [2020-12-22 09:06:41,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:06:41,706 INFO L481 AbstractCegarLoop]: Abstraction has 28329 states and 46597 transitions. [2020-12-22 09:06:41,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:06:41,707 INFO L276 IsEmpty]: Start isEmpty. Operand 28329 states and 46597 transitions. [2020-12-22 09:06:41,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-12-22 09:06:41,708 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:06:41,708 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:06:41,709 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 09:06:41,709 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:06:41,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:06:41,709 INFO L82 PathProgramCache]: Analyzing trace with hash -434438713, now seen corresponding path program 1 times [2020-12-22 09:06:41,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:06:41,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36083611] [2020-12-22 09:06:41,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:06:41,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:06:41,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:06:41,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36083611] [2020-12-22 09:06:41,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:06:41,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:06:41,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322561896] [2020-12-22 09:06:41,804 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:06:41,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:06:41,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:06:41,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:06:41,805 INFO L87 Difference]: Start difference. First operand 28329 states and 46597 transitions. Second operand 3 states. [2020-12-22 09:06:43,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:06:43,545 INFO L93 Difference]: Finished difference Result 54295 states and 89424 transitions. [2020-12-22 09:06:43,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:06:43,545 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 132 [2020-12-22 09:06:43,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:06:43,687 INFO L225 Difference]: With dead ends: 54295 [2020-12-22 09:06:43,687 INFO L226 Difference]: Without dead ends: 39073 [2020-12-22 09:06:43,709 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:06:43,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39073 states. [2020-12-22 09:06:45,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39073 to 39071. [2020-12-22 09:06:45,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39071 states. [2020-12-22 09:06:45,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39071 states to 39071 states and 64051 transitions. [2020-12-22 09:06:45,466 INFO L78 Accepts]: Start accepts. Automaton has 39071 states and 64051 transitions. Word has length 132 [2020-12-22 09:06:45,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:06:45,467 INFO L481 AbstractCegarLoop]: Abstraction has 39071 states and 64051 transitions. [2020-12-22 09:06:45,467 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:06:45,467 INFO L276 IsEmpty]: Start isEmpty. Operand 39071 states and 64051 transitions. [2020-12-22 09:06:45,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-12-22 09:06:45,469 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:06:45,469 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:06:45,469 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 09:06:45,469 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:06:45,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:06:45,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1251457259, now seen corresponding path program 1 times [2020-12-22 09:06:45,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:06:45,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723588953] [2020-12-22 09:06:45,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:06:45,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:06:45,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:06:45,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723588953] [2020-12-22 09:06:45,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:06:45,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:06:45,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463601252] [2020-12-22 09:06:45,633 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:06:45,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:06:45,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:06:45,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:06:45,634 INFO L87 Difference]: Start difference. First operand 39071 states and 64051 transitions. Second operand 4 states. [2020-12-22 09:06:49,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:06:49,716 INFO L93 Difference]: Finished difference Result 126537 states and 207711 transitions. [2020-12-22 09:06:49,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:06:49,717 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 133 [2020-12-22 09:06:49,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:06:49,839 INFO L225 Difference]: With dead ends: 126537 [2020-12-22 09:06:49,839 INFO L226 Difference]: Without dead ends: 87727 [2020-12-22 09:06:49,883 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:06:49,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87727 states. [2020-12-22 09:06:53,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87727 to 63256. [2020-12-22 09:06:53,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63256 states. [2020-12-22 09:06:53,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63256 states to 63256 states and 103358 transitions. [2020-12-22 09:06:53,517 INFO L78 Accepts]: Start accepts. Automaton has 63256 states and 103358 transitions. Word has length 133 [2020-12-22 09:06:53,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:06:53,517 INFO L481 AbstractCegarLoop]: Abstraction has 63256 states and 103358 transitions. [2020-12-22 09:06:53,517 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:06:53,517 INFO L276 IsEmpty]: Start isEmpty. Operand 63256 states and 103358 transitions. [2020-12-22 09:06:53,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-12-22 09:06:53,519 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:06:53,519 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:06:53,519 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 09:06:53,519 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:06:53,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:06:53,520 INFO L82 PathProgramCache]: Analyzing trace with hash -193857308, now seen corresponding path program 1 times [2020-12-22 09:06:53,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:06:53,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709806768] [2020-12-22 09:06:53,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:06:53,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:06:53,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:06:53,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709806768] [2020-12-22 09:06:53,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:06:53,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:06:53,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574466995] [2020-12-22 09:06:53,613 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:06:53,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:06:53,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:06:53,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:06:53,614 INFO L87 Difference]: Start difference. First operand 63256 states and 103358 transitions. Second operand 4 states. [2020-12-22 09:07:00,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:07:00,187 INFO L93 Difference]: Finished difference Result 202567 states and 331417 transitions. [2020-12-22 09:07:00,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:07:00,188 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 134 [2020-12-22 09:07:00,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:07:00,437 INFO L225 Difference]: With dead ends: 202567 [2020-12-22 09:07:00,437 INFO L226 Difference]: Without dead ends: 139572 [2020-12-22 09:07:00,495 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:07:00,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139572 states. [2020-12-22 09:07:06,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139572 to 101189. [2020-12-22 09:07:06,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101189 states. [2020-12-22 09:07:06,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101189 states to 101189 states and 164801 transitions. [2020-12-22 09:07:06,248 INFO L78 Accepts]: Start accepts. Automaton has 101189 states and 164801 transitions. Word has length 134 [2020-12-22 09:07:06,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:07:06,248 INFO L481 AbstractCegarLoop]: Abstraction has 101189 states and 164801 transitions. [2020-12-22 09:07:06,248 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:07:06,248 INFO L276 IsEmpty]: Start isEmpty. Operand 101189 states and 164801 transitions. [2020-12-22 09:07:06,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-12-22 09:07:06,249 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:07:06,249 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:07:06,250 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 09:07:06,250 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:07:06,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:07:06,250 INFO L82 PathProgramCache]: Analyzing trace with hash 1164383125, now seen corresponding path program 1 times [2020-12-22 09:07:06,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:07:06,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095083029] [2020-12-22 09:07:06,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:07:06,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:07:06,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:07:06,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095083029] [2020-12-22 09:07:06,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:07:06,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:07:06,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076903836] [2020-12-22 09:07:06,458 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:07:06,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:07:06,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:07:06,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:07:06,459 INFO L87 Difference]: Start difference. First operand 101189 states and 164801 transitions. Second operand 4 states. [2020-12-22 09:07:17,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:07:17,359 INFO L93 Difference]: Finished difference Result 299589 states and 487846 transitions. [2020-12-22 09:07:17,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:07:17,359 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 136 [2020-12-22 09:07:17,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:07:17,742 INFO L225 Difference]: With dead ends: 299589 [2020-12-22 09:07:17,742 INFO L226 Difference]: Without dead ends: 198411 [2020-12-22 09:07:17,894 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:07:18,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198411 states. [2020-12-22 09:07:28,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198411 to 198409. [2020-12-22 09:07:28,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198409 states. [2020-12-22 09:07:29,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198409 states to 198409 states and 321887 transitions. [2020-12-22 09:07:29,229 INFO L78 Accepts]: Start accepts. Automaton has 198409 states and 321887 transitions. Word has length 136 [2020-12-22 09:07:29,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:07:29,238 INFO L481 AbstractCegarLoop]: Abstraction has 198409 states and 321887 transitions. [2020-12-22 09:07:29,238 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:07:29,238 INFO L276 IsEmpty]: Start isEmpty. Operand 198409 states and 321887 transitions. [2020-12-22 09:07:29,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-12-22 09:07:29,242 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:07:29,242 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:07:29,242 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 09:07:29,242 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:07:29,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:07:29,243 INFO L82 PathProgramCache]: Analyzing trace with hash -512784610, now seen corresponding path program 1 times [2020-12-22 09:07:29,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:07:29,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473443883] [2020-12-22 09:07:29,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:07:29,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:07:29,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:07:29,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473443883] [2020-12-22 09:07:29,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:07:29,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:07:29,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113541720] [2020-12-22 09:07:29,319 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:07:29,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:07:29,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:07:29,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:07:29,320 INFO L87 Difference]: Start difference. First operand 198409 states and 321887 transitions. Second operand 3 states. [2020-12-22 09:07:44,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:07:44,982 INFO L93 Difference]: Finished difference Result 477408 states and 777968 transitions. [2020-12-22 09:07:44,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:07:44,983 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 137 [2020-12-22 09:07:44,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:07:45,552 INFO L225 Difference]: With dead ends: 477408 [2020-12-22 09:07:45,553 INFO L226 Difference]: Without dead ends: 279395 [2020-12-22 09:07:45,741 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:07:45,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279395 states.