/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/pals_floodmax.3.4.ufo.BOUNDED-6.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 07:19:58,747 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 07:19:58,750 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 07:19:58,783 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 07:19:58,783 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 07:19:58,785 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 07:19:58,787 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 07:19:58,789 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 07:19:58,791 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 07:19:58,792 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 07:19:58,793 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 07:19:58,795 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 07:19:58,795 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 07:19:58,797 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 07:19:58,798 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 07:19:58,799 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 07:19:58,800 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 07:19:58,802 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 07:19:58,804 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 07:19:58,806 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 07:19:58,808 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 07:19:58,809 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 07:19:58,811 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 07:19:58,812 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 07:19:58,815 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 07:19:58,826 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 07:19:58,827 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 07:19:58,828 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 07:19:58,829 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 07:19:58,860 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 07:19:58,860 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 07:19:58,862 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 07:19:58,862 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 07:19:58,862 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 07:19:58,863 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 07:19:58,865 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 07:19:58,865 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 07:19:58,865 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 07:19:58,865 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 07:19:58,866 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 07:19:58,869 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 07:19:58,869 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 07:19:58,869 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 07:19:58,869 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 07:19:58,870 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 07:19:58,870 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 07:19:58,870 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:19:58,870 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 07:19:58,871 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 07:19:58,871 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 07:19:58,871 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 07:19:58,871 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 07:19:58,871 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 07:19:58,872 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 07:19:58,872 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 07:19:59,292 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 07:19:59,319 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 07:19:59,322 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 07:19:59,323 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 07:19:59,324 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 07:19:59,325 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.4.ufo.BOUNDED-6.pals.c [2020-12-22 07:19:59,411 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a93ef8c5/421d66fb78d24c1b8b056e67c77ca8ae/FLAGfed3c1a19 [2020-12-22 07:20:00,156 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 07:20:00,157 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.4.ufo.BOUNDED-6.pals.c [2020-12-22 07:20:00,177 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a93ef8c5/421d66fb78d24c1b8b056e67c77ca8ae/FLAGfed3c1a19 [2020-12-22 07:20:00,441 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a93ef8c5/421d66fb78d24c1b8b056e67c77ca8ae [2020-12-22 07:20:00,444 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 07:20:00,447 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 07:20:00,448 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 07:20:00,448 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 07:20:00,452 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 07:20:00,454 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:20:00" (1/1) ... [2020-12-22 07:20:00,456 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@396a6cb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:00, skipping insertion in model container [2020-12-22 07:20:00,456 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:20:00" (1/1) ... [2020-12-22 07:20:00,469 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 07:20:00,525 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 07:20:00,804 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/pals_floodmax.3.4.ufo.BOUNDED-6.pals.c[12764,12777] [2020-12-22 07:20:00,808 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:20:00,819 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 07:20:00,950 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/pals_floodmax.3.4.ufo.BOUNDED-6.pals.c[12764,12777] [2020-12-22 07:20:00,954 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:20:00,986 INFO L208 MainTranslator]: Completed translation [2020-12-22 07:20:00,986 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:00 WrapperNode [2020-12-22 07:20:00,987 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 07:20:00,988 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 07:20:00,988 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 07:20:00,988 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 07:20:00,999 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:00" (1/1) ... [2020-12-22 07:20:01,012 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:00" (1/1) ... [2020-12-22 07:20:01,057 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 07:20:01,058 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 07:20:01,058 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 07:20:01,058 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 07:20:01,069 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:00" (1/1) ... [2020-12-22 07:20:01,069 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:00" (1/1) ... [2020-12-22 07:20:01,073 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:00" (1/1) ... [2020-12-22 07:20:01,073 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:00" (1/1) ... [2020-12-22 07:20:01,084 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:00" (1/1) ... [2020-12-22 07:20:01,094 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:00" (1/1) ... [2020-12-22 07:20:01,102 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:00" (1/1) ... [2020-12-22 07:20:01,113 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 07:20:01,118 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 07:20:01,118 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 07:20:01,118 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 07:20:01,123 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:00" (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 07:20:01,286 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 07:20:01,287 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 07:20:01,287 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 07:20:01,288 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 07:20:02,326 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 07:20:02,326 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2020-12-22 07:20:02,330 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:20:02 BoogieIcfgContainer [2020-12-22 07:20:02,330 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 07:20:02,337 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 07:20:02,337 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 07:20:02,340 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 07:20:02,341 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:20:00" (1/3) ... [2020-12-22 07:20:02,342 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e203282 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:20:02, skipping insertion in model container [2020-12-22 07:20:02,342 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:00" (2/3) ... [2020-12-22 07:20:02,342 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e203282 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:20:02, skipping insertion in model container [2020-12-22 07:20:02,343 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:20:02" (3/3) ... [2020-12-22 07:20:02,344 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.4.ufo.BOUNDED-6.pals.c [2020-12-22 07:20:02,351 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 07:20:02,356 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 07:20:02,375 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 07:20:02,403 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 07:20:02,403 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 07:20:02,403 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 07:20:02,403 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 07:20:02,404 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 07:20:02,404 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 07:20:02,404 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 07:20:02,404 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 07:20:02,422 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states. [2020-12-22 07:20:02,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 07:20:02,431 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:20:02,432 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 07:20:02,432 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:20:02,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:20:02,438 INFO L82 PathProgramCache]: Analyzing trace with hash -306716250, now seen corresponding path program 1 times [2020-12-22 07:20:02,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:20:02,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888370256] [2020-12-22 07:20:02,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:20:02,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:20:02,783 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 07:20:02,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888370256] [2020-12-22 07:20:02,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:20:02,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:20:02,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415968602] [2020-12-22 07:20:02,794 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 07:20:02,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:20:02,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 07:20:02,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:20:02,817 INFO L87 Difference]: Start difference. First operand 131 states. Second operand 2 states. [2020-12-22 07:20:02,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:20:02,875 INFO L93 Difference]: Finished difference Result 206 states and 352 transitions. [2020-12-22 07:20:02,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 07:20:02,876 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 37 [2020-12-22 07:20:02,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:20:02,889 INFO L225 Difference]: With dead ends: 206 [2020-12-22 07:20:02,889 INFO L226 Difference]: Without dead ends: 127 [2020-12-22 07:20:02,893 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:20:02,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-12-22 07:20:02,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2020-12-22 07:20:02,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-12-22 07:20:02,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 220 transitions. [2020-12-22 07:20:02,944 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 220 transitions. Word has length 37 [2020-12-22 07:20:02,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:20:02,944 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 220 transitions. [2020-12-22 07:20:02,944 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 07:20:02,945 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 220 transitions. [2020-12-22 07:20:02,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 07:20:02,947 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:20:02,947 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 07:20:02,947 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 07:20:02,948 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:20:02,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:20:02,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1124364700, now seen corresponding path program 1 times [2020-12-22 07:20:02,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:20:02,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78587809] [2020-12-22 07:20:02,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:20:02,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:20:03,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:20:03,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78587809] [2020-12-22 07:20:03,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:20:03,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:20:03,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143654279] [2020-12-22 07:20:03,145 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:20:03,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:20:03,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:20:03,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:20:03,147 INFO L87 Difference]: Start difference. First operand 127 states and 220 transitions. Second operand 5 states. [2020-12-22 07:20:03,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:20:03,275 INFO L93 Difference]: Finished difference Result 271 states and 460 transitions. [2020-12-22 07:20:03,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:20:03,276 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 37 [2020-12-22 07:20:03,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:20:03,279 INFO L225 Difference]: With dead ends: 271 [2020-12-22 07:20:03,279 INFO L226 Difference]: Without dead ends: 197 [2020-12-22 07:20:03,280 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:20:03,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-12-22 07:20:03,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 127. [2020-12-22 07:20:03,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-12-22 07:20:03,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 193 transitions. [2020-12-22 07:20:03,296 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 193 transitions. Word has length 37 [2020-12-22 07:20:03,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:20:03,296 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 193 transitions. [2020-12-22 07:20:03,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:20:03,297 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 193 transitions. [2020-12-22 07:20:03,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 07:20:03,299 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:20:03,299 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] [2020-12-22 07:20:03,300 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 07:20:03,300 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:20:03,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:20:03,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1313145683, now seen corresponding path program 1 times [2020-12-22 07:20:03,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:20:03,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867366751] [2020-12-22 07:20:03,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:20:03,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:20:03,437 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 07:20:03,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867366751] [2020-12-22 07:20:03,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:20:03,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:20:03,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889085371] [2020-12-22 07:20:03,438 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:20:03,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:20:03,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:20:03,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:20:03,440 INFO L87 Difference]: Start difference. First operand 127 states and 193 transitions. Second operand 3 states. [2020-12-22 07:20:03,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:20:03,520 INFO L93 Difference]: Finished difference Result 252 states and 402 transitions. [2020-12-22 07:20:03,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:20:03,520 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 63 [2020-12-22 07:20:03,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:20:03,529 INFO L225 Difference]: With dead ends: 252 [2020-12-22 07:20:03,529 INFO L226 Difference]: Without dead ends: 182 [2020-12-22 07:20:03,530 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 07:20:03,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-12-22 07:20:03,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 180. [2020-12-22 07:20:03,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-12-22 07:20:03,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 278 transitions. [2020-12-22 07:20:03,566 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 278 transitions. Word has length 63 [2020-12-22 07:20:03,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:20:03,567 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 278 transitions. [2020-12-22 07:20:03,567 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:20:03,567 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 278 transitions. [2020-12-22 07:20:03,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 07:20:03,573 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:20:03,576 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] [2020-12-22 07:20:03,576 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 07:20:03,577 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:20:03,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:20:03,577 INFO L82 PathProgramCache]: Analyzing trace with hash -255493166, now seen corresponding path program 1 times [2020-12-22 07:20:03,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:20:03,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167259274] [2020-12-22 07:20:03,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:20:03,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:20:03,713 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 07:20:03,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167259274] [2020-12-22 07:20:03,714 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:20:03,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:20:03,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485921869] [2020-12-22 07:20:03,715 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:20:03,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:20:03,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:20:03,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:20:03,717 INFO L87 Difference]: Start difference. First operand 180 states and 278 transitions. Second operand 3 states. [2020-12-22 07:20:03,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:20:03,746 INFO L93 Difference]: Finished difference Result 360 states and 576 transitions. [2020-12-22 07:20:03,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:20:03,747 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2020-12-22 07:20:03,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:20:03,749 INFO L225 Difference]: With dead ends: 360 [2020-12-22 07:20:03,749 INFO L226 Difference]: Without dead ends: 237 [2020-12-22 07:20:03,751 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 07:20:03,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-12-22 07:20:03,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 235. [2020-12-22 07:20:03,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2020-12-22 07:20:03,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 370 transitions. [2020-12-22 07:20:03,767 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 370 transitions. Word has length 65 [2020-12-22 07:20:03,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:20:03,768 INFO L481 AbstractCegarLoop]: Abstraction has 235 states and 370 transitions. [2020-12-22 07:20:03,768 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:20:03,768 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 370 transitions. [2020-12-22 07:20:03,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 07:20:03,770 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:20:03,770 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] [2020-12-22 07:20:03,770 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 07:20:03,770 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:20:03,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:20:03,771 INFO L82 PathProgramCache]: Analyzing trace with hash 1395779292, now seen corresponding path program 1 times [2020-12-22 07:20:03,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:20:03,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44084113] [2020-12-22 07:20:03,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:20:03,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:20:03,909 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 07:20:03,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44084113] [2020-12-22 07:20:03,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:20:03,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:20:03,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124205455] [2020-12-22 07:20:03,911 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:20:03,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:20:03,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:20:03,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:20:03,914 INFO L87 Difference]: Start difference. First operand 235 states and 370 transitions. Second operand 3 states. [2020-12-22 07:20:03,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:20:03,955 INFO L93 Difference]: Finished difference Result 566 states and 917 transitions. [2020-12-22 07:20:03,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:20:03,955 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2020-12-22 07:20:03,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:20:03,959 INFO L225 Difference]: With dead ends: 566 [2020-12-22 07:20:03,959 INFO L226 Difference]: Without dead ends: 390 [2020-12-22 07:20:03,960 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 07:20:03,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2020-12-22 07:20:03,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 388. [2020-12-22 07:20:03,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 388 states. [2020-12-22 07:20:03,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 620 transitions. [2020-12-22 07:20:03,984 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 620 transitions. Word has length 65 [2020-12-22 07:20:03,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:20:03,985 INFO L481 AbstractCegarLoop]: Abstraction has 388 states and 620 transitions. [2020-12-22 07:20:03,985 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:20:03,985 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 620 transitions. [2020-12-22 07:20:03,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 07:20:03,987 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:20:03,987 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:20:03,987 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 07:20:03,988 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:20:03,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:20:03,988 INFO L82 PathProgramCache]: Analyzing trace with hash -812427391, now seen corresponding path program 1 times [2020-12-22 07:20:03,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:20:03,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563347884] [2020-12-22 07:20:03,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:20:04,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:20:04,054 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 07:20:04,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563347884] [2020-12-22 07:20:04,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:20:04,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:20:04,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47251636] [2020-12-22 07:20:04,055 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:20:04,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:20:04,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:20:04,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:20:04,057 INFO L87 Difference]: Start difference. First operand 388 states and 620 transitions. Second operand 3 states. [2020-12-22 07:20:04,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:20:04,091 INFO L93 Difference]: Finished difference Result 705 states and 1143 transitions. [2020-12-22 07:20:04,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:20:04,092 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 67 [2020-12-22 07:20:04,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:20:04,096 INFO L225 Difference]: With dead ends: 705 [2020-12-22 07:20:04,096 INFO L226 Difference]: Without dead ends: 529 [2020-12-22 07:20:04,097 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 07:20:04,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2020-12-22 07:20:04,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 527. [2020-12-22 07:20:04,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 527 states. [2020-12-22 07:20:04,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 845 transitions. [2020-12-22 07:20:04,122 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 845 transitions. Word has length 67 [2020-12-22 07:20:04,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:20:04,123 INFO L481 AbstractCegarLoop]: Abstraction has 527 states and 845 transitions. [2020-12-22 07:20:04,123 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:20:04,123 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 845 transitions. [2020-12-22 07:20:04,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 07:20:04,124 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:20:04,124 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:20:04,125 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 07:20:04,125 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:20:04,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:20:04,126 INFO L82 PathProgramCache]: Analyzing trace with hash 221435787, now seen corresponding path program 1 times [2020-12-22 07:20:04,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:20:04,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974342700] [2020-12-22 07:20:04,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:20:04,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:20:04,215 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 07:20:04,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974342700] [2020-12-22 07:20:04,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:20:04,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:20:04,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571052151] [2020-12-22 07:20:04,218 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:20:04,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:20:04,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:20:04,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:20:04,220 INFO L87 Difference]: Start difference. First operand 527 states and 845 transitions. Second operand 3 states. [2020-12-22 07:20:04,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:20:04,274 INFO L93 Difference]: Finished difference Result 1380 states and 2236 transitions. [2020-12-22 07:20:04,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:20:04,275 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 67 [2020-12-22 07:20:04,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:20:04,281 INFO L225 Difference]: With dead ends: 1380 [2020-12-22 07:20:04,281 INFO L226 Difference]: Without dead ends: 922 [2020-12-22 07:20:04,283 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 07:20:04,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 922 states. [2020-12-22 07:20:04,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 922 to 920. [2020-12-22 07:20:04,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 920 states. [2020-12-22 07:20:04,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 920 states to 920 states and 1472 transitions. [2020-12-22 07:20:04,338 INFO L78 Accepts]: Start accepts. Automaton has 920 states and 1472 transitions. Word has length 67 [2020-12-22 07:20:04,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:20:04,339 INFO L481 AbstractCegarLoop]: Abstraction has 920 states and 1472 transitions. [2020-12-22 07:20:04,340 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:20:04,340 INFO L276 IsEmpty]: Start isEmpty. Operand 920 states and 1472 transitions. [2020-12-22 07:20:04,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-22 07:20:04,341 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:20:04,341 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] [2020-12-22 07:20:04,341 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 07:20:04,342 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:20:04,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:20:04,342 INFO L82 PathProgramCache]: Analyzing trace with hash 664156592, now seen corresponding path program 1 times [2020-12-22 07:20:04,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:20:04,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279835273] [2020-12-22 07:20:04,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:20:04,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:20:04,425 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 07:20:04,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279835273] [2020-12-22 07:20:04,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:20:04,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:20:04,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059579033] [2020-12-22 07:20:04,427 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:20:04,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:20:04,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:20:04,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:20:04,428 INFO L87 Difference]: Start difference. First operand 920 states and 1472 transitions. Second operand 3 states. [2020-12-22 07:20:04,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:20:04,477 INFO L93 Difference]: Finished difference Result 1711 states and 2761 transitions. [2020-12-22 07:20:04,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:20:04,477 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 69 [2020-12-22 07:20:04,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:20:04,485 INFO L225 Difference]: With dead ends: 1711 [2020-12-22 07:20:04,485 INFO L226 Difference]: Without dead ends: 1253 [2020-12-22 07:20:04,486 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 07:20:04,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1253 states. [2020-12-22 07:20:04,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1253 to 1251. [2020-12-22 07:20:04,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1251 states. [2020-12-22 07:20:04,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1251 states to 1251 states and 1996 transitions. [2020-12-22 07:20:04,542 INFO L78 Accepts]: Start accepts. Automaton has 1251 states and 1996 transitions. Word has length 69 [2020-12-22 07:20:04,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:20:04,542 INFO L481 AbstractCegarLoop]: Abstraction has 1251 states and 1996 transitions. [2020-12-22 07:20:04,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:20:04,542 INFO L276 IsEmpty]: Start isEmpty. Operand 1251 states and 1996 transitions. [2020-12-22 07:20:04,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-22 07:20:04,543 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:20:04,543 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] [2020-12-22 07:20:04,544 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 07:20:04,544 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:20:04,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:20:04,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1757720902, now seen corresponding path program 1 times [2020-12-22 07:20:04,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:20:04,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645468536] [2020-12-22 07:20:04,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:20:04,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:20:04,696 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 07:20:04,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645468536] [2020-12-22 07:20:04,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:20:04,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:20:04,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316341343] [2020-12-22 07:20:04,702 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:20:04,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:20:04,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:20:04,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:20:04,707 INFO L87 Difference]: Start difference. First operand 1251 states and 1996 transitions. Second operand 5 states. [2020-12-22 07:20:05,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:20:05,025 INFO L93 Difference]: Finished difference Result 7020 states and 11356 transitions. [2020-12-22 07:20:05,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 07:20:05,026 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 69 [2020-12-22 07:20:05,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:20:05,058 INFO L225 Difference]: With dead ends: 7020 [2020-12-22 07:20:05,059 INFO L226 Difference]: Without dead ends: 5848 [2020-12-22 07:20:05,063 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:20:05,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5848 states. [2020-12-22 07:20:05,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5848 to 2385. [2020-12-22 07:20:05,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2385 states. [2020-12-22 07:20:05,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2385 states to 2385 states and 3796 transitions. [2020-12-22 07:20:05,225 INFO L78 Accepts]: Start accepts. Automaton has 2385 states and 3796 transitions. Word has length 69 [2020-12-22 07:20:05,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:20:05,226 INFO L481 AbstractCegarLoop]: Abstraction has 2385 states and 3796 transitions. [2020-12-22 07:20:05,226 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:20:05,226 INFO L276 IsEmpty]: Start isEmpty. Operand 2385 states and 3796 transitions. [2020-12-22 07:20:05,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 07:20:05,227 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:20:05,227 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] [2020-12-22 07:20:05,227 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 07:20:05,228 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:20:05,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:20:05,228 INFO L82 PathProgramCache]: Analyzing trace with hash -577605759, now seen corresponding path program 1 times [2020-12-22 07:20:05,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:20:05,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066657524] [2020-12-22 07:20:05,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:20:05,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:20:05,321 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 07:20:05,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066657524] [2020-12-22 07:20:05,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:20:05,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:20:05,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737108079] [2020-12-22 07:20:05,323 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:20:05,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:20:05,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:20:05,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:20:05,324 INFO L87 Difference]: Start difference. First operand 2385 states and 3796 transitions. Second operand 4 states. [2020-12-22 07:20:05,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:20:05,633 INFO L93 Difference]: Finished difference Result 9047 states and 14463 transitions. [2020-12-22 07:20:05,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:20:05,634 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 70 [2020-12-22 07:20:05,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:20:05,708 INFO L225 Difference]: With dead ends: 9047 [2020-12-22 07:20:05,709 INFO L226 Difference]: Without dead ends: 6741 [2020-12-22 07:20:05,712 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 07:20:05,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6741 states. [2020-12-22 07:20:05,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6741 to 4544. [2020-12-22 07:20:05,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4544 states. [2020-12-22 07:20:05,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4544 states to 4544 states and 7198 transitions. [2020-12-22 07:20:05,942 INFO L78 Accepts]: Start accepts. Automaton has 4544 states and 7198 transitions. Word has length 70 [2020-12-22 07:20:05,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:20:05,942 INFO L481 AbstractCegarLoop]: Abstraction has 4544 states and 7198 transitions. [2020-12-22 07:20:05,943 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:20:05,943 INFO L276 IsEmpty]: Start isEmpty. Operand 4544 states and 7198 transitions. [2020-12-22 07:20:05,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-22 07:20:05,944 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:20:05,944 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] [2020-12-22 07:20:05,944 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 07:20:05,944 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:20:05,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:20:05,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1815229649, now seen corresponding path program 1 times [2020-12-22 07:20:05,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:20:05,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625242793] [2020-12-22 07:20:05,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:20:05,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:20:06,038 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 07:20:06,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625242793] [2020-12-22 07:20:06,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:20:06,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:20:06,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763934984] [2020-12-22 07:20:06,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:20:06,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:20:06,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:20:06,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:20:06,041 INFO L87 Difference]: Start difference. First operand 4544 states and 7198 transitions. Second operand 4 states. [2020-12-22 07:20:06,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:20:06,533 INFO L93 Difference]: Finished difference Result 14858 states and 23638 transitions. [2020-12-22 07:20:06,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:20:06,534 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 71 [2020-12-22 07:20:06,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:20:06,586 INFO L225 Difference]: With dead ends: 14858 [2020-12-22 07:20:06,587 INFO L226 Difference]: Without dead ends: 10393 [2020-12-22 07:20:06,595 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:20:06,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10393 states. [2020-12-22 07:20:06,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10393 to 7308. [2020-12-22 07:20:06,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7308 states. [2020-12-22 07:20:07,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7308 states to 7308 states and 11506 transitions. [2020-12-22 07:20:07,022 INFO L78 Accepts]: Start accepts. Automaton has 7308 states and 11506 transitions. Word has length 71 [2020-12-22 07:20:07,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:20:07,023 INFO L481 AbstractCegarLoop]: Abstraction has 7308 states and 11506 transitions. [2020-12-22 07:20:07,023 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:20:07,023 INFO L276 IsEmpty]: Start isEmpty. Operand 7308 states and 11506 transitions. [2020-12-22 07:20:07,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 07:20:07,024 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:20:07,024 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] [2020-12-22 07:20:07,024 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 07:20:07,024 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:20:07,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:20:07,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1147279688, now seen corresponding path program 1 times [2020-12-22 07:20:07,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:20:07,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241344244] [2020-12-22 07:20:07,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:20:07,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:20:07,106 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 07:20:07,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241344244] [2020-12-22 07:20:07,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:20:07,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:20:07,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700435097] [2020-12-22 07:20:07,107 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:20:07,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:20:07,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:20:07,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:20:07,109 INFO L87 Difference]: Start difference. First operand 7308 states and 11506 transitions. Second operand 4 states. [2020-12-22 07:20:07,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:20:07,812 INFO L93 Difference]: Finished difference Result 23155 states and 36579 transitions. [2020-12-22 07:20:07,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:20:07,813 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 72 [2020-12-22 07:20:07,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:20:07,847 INFO L225 Difference]: With dead ends: 23155 [2020-12-22 07:20:07,847 INFO L226 Difference]: Without dead ends: 15926 [2020-12-22 07:20:07,859 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 07:20:07,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15926 states. [2020-12-22 07:20:08,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15926 to 11564. [2020-12-22 07:20:08,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11564 states. [2020-12-22 07:20:08,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11564 states to 11564 states and 18086 transitions. [2020-12-22 07:20:08,508 INFO L78 Accepts]: Start accepts. Automaton has 11564 states and 18086 transitions. Word has length 72 [2020-12-22 07:20:08,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:20:08,509 INFO L481 AbstractCegarLoop]: Abstraction has 11564 states and 18086 transitions. [2020-12-22 07:20:08,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:20:08,509 INFO L276 IsEmpty]: Start isEmpty. Operand 11564 states and 18086 transitions. [2020-12-22 07:20:08,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-22 07:20:08,510 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:20:08,510 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] [2020-12-22 07:20:08,510 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 07:20:08,511 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:20:08,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:20:08,511 INFO L82 PathProgramCache]: Analyzing trace with hash -856706640, now seen corresponding path program 1 times [2020-12-22 07:20:08,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:20:08,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378444442] [2020-12-22 07:20:08,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:20:08,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:20:08,631 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 07:20:08,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378444442] [2020-12-22 07:20:08,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:20:08,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:20:08,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341588969] [2020-12-22 07:20:08,632 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:20:08,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:20:08,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:20:08,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:20:08,634 INFO L87 Difference]: Start difference. First operand 11564 states and 18086 transitions. Second operand 4 states. [2020-12-22 07:20:09,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:20:09,607 INFO L93 Difference]: Finished difference Result 34382 states and 53735 transitions. [2020-12-22 07:20:09,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:20:09,608 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 74 [2020-12-22 07:20:09,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:20:09,665 INFO L225 Difference]: With dead ends: 34382 [2020-12-22 07:20:09,666 INFO L226 Difference]: Without dead ends: 22827 [2020-12-22 07:20:09,686 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 07:20:09,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22827 states. [2020-12-22 07:20:10,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22827 to 22825. [2020-12-22 07:20:10,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22825 states. [2020-12-22 07:20:10,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22825 states to 22825 states and 35458 transitions. [2020-12-22 07:20:10,810 INFO L78 Accepts]: Start accepts. Automaton has 22825 states and 35458 transitions. Word has length 74 [2020-12-22 07:20:10,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:20:10,810 INFO L481 AbstractCegarLoop]: Abstraction has 22825 states and 35458 transitions. [2020-12-22 07:20:10,811 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:20:10,811 INFO L276 IsEmpty]: Start isEmpty. Operand 22825 states and 35458 transitions. [2020-12-22 07:20:10,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-22 07:20:10,812 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:20:10,812 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] [2020-12-22 07:20:10,813 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 07:20:10,813 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:20:10,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:20:10,814 INFO L82 PathProgramCache]: Analyzing trace with hash -1857988380, now seen corresponding path program 1 times [2020-12-22 07:20:10,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:20:10,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102781510] [2020-12-22 07:20:10,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:20:10,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:20:10,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:20:10,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102781510] [2020-12-22 07:20:10,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:20:10,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:20:10,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140940269] [2020-12-22 07:20:10,855 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:20:10,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:20:10,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:20:10,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:20:10,856 INFO L87 Difference]: Start difference. First operand 22825 states and 35458 transitions. Second operand 3 states. [2020-12-22 07:20:12,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:20:12,335 INFO L93 Difference]: Finished difference Result 68437 states and 106312 transitions. [2020-12-22 07:20:12,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:20:12,336 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 75 [2020-12-22 07:20:12,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:20:12,441 INFO L225 Difference]: With dead ends: 68437 [2020-12-22 07:20:12,441 INFO L226 Difference]: Without dead ends: 45640 [2020-12-22 07:20:12,469 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 07:20:12,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45640 states. [2020-12-22 07:20:13,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45640 to 22827. [2020-12-22 07:20:13,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22827 states. [2020-12-22 07:20:13,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22827 states to 22827 states and 35460 transitions. [2020-12-22 07:20:13,573 INFO L78 Accepts]: Start accepts. Automaton has 22827 states and 35460 transitions. Word has length 75 [2020-12-22 07:20:13,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:20:13,573 INFO L481 AbstractCegarLoop]: Abstraction has 22827 states and 35460 transitions. [2020-12-22 07:20:13,574 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:20:13,574 INFO L276 IsEmpty]: Start isEmpty. Operand 22827 states and 35460 transitions. [2020-12-22 07:20:13,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 07:20:13,574 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:20:13,575 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] [2020-12-22 07:20:13,575 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 07:20:13,575 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:20:13,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:20:13,576 INFO L82 PathProgramCache]: Analyzing trace with hash 424514133, now seen corresponding path program 1 times [2020-12-22 07:20:13,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:20:13,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224172809] [2020-12-22 07:20:13,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:20:13,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:20:13,695 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 07:20:13,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224172809] [2020-12-22 07:20:13,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:20:13,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:20:13,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148584005] [2020-12-22 07:20:13,697 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:20:13,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:20:13,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:20:13,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:20:13,698 INFO L87 Difference]: Start difference. First operand 22827 states and 35460 transitions. Second operand 4 states. [2020-12-22 07:20:15,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:20:15,269 INFO L93 Difference]: Finished difference Result 67865 states and 105346 transitions. [2020-12-22 07:20:15,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:20:15,269 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 76 [2020-12-22 07:20:15,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:20:15,360 INFO L225 Difference]: With dead ends: 67865 [2020-12-22 07:20:15,361 INFO L226 Difference]: Without dead ends: 45050 [2020-12-22 07:20:15,394 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 07:20:15,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45050 states. [2020-12-22 07:20:17,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45050 to 45048. [2020-12-22 07:20:17,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45048 states. [2020-12-22 07:20:17,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45048 states to 45048 states and 69493 transitions. [2020-12-22 07:20:17,378 INFO L78 Accepts]: Start accepts. Automaton has 45048 states and 69493 transitions. Word has length 76 [2020-12-22 07:20:17,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:20:17,378 INFO L481 AbstractCegarLoop]: Abstraction has 45048 states and 69493 transitions. [2020-12-22 07:20:17,379 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:20:17,379 INFO L276 IsEmpty]: Start isEmpty. Operand 45048 states and 69493 transitions. [2020-12-22 07:20:17,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 07:20:17,380 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:20:17,380 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] [2020-12-22 07:20:17,381 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 07:20:17,381 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:20:17,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:20:17,382 INFO L82 PathProgramCache]: Analyzing trace with hash 551656516, now seen corresponding path program 1 times [2020-12-22 07:20:17,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:20:17,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040459691] [2020-12-22 07:20:17,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:20:17,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:20:17,496 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 07:20:17,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040459691] [2020-12-22 07:20:17,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:20:17,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:20:17,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522399202] [2020-12-22 07:20:17,500 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:20:17,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:20:17,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:20:17,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:20:17,501 INFO L87 Difference]: Start difference. First operand 45048 states and 69493 transitions. Second operand 4 states. [2020-12-22 07:20:20,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:20:20,565 INFO L93 Difference]: Finished difference Result 133396 states and 205667 transitions. [2020-12-22 07:20:20,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:20:20,566 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 76 [2020-12-22 07:20:20,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:20:20,741 INFO L225 Difference]: With dead ends: 133396 [2020-12-22 07:20:20,741 INFO L226 Difference]: Without dead ends: 88394 [2020-12-22 07:20:20,819 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 07:20:20,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88394 states. [2020-12-22 07:20:24,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88394 to 88392. [2020-12-22 07:20:24,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88392 states. [2020-12-22 07:20:24,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88392 states to 88392 states and 135223 transitions. [2020-12-22 07:20:24,746 INFO L78 Accepts]: Start accepts. Automaton has 88392 states and 135223 transitions. Word has length 76 [2020-12-22 07:20:24,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:20:24,747 INFO L481 AbstractCegarLoop]: Abstraction has 88392 states and 135223 transitions. [2020-12-22 07:20:24,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:20:24,747 INFO L276 IsEmpty]: Start isEmpty. Operand 88392 states and 135223 transitions. [2020-12-22 07:20:24,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 07:20:24,749 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:20:24,749 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] [2020-12-22 07:20:24,750 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 07:20:24,750 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:20:24,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:20:24,751 INFO L82 PathProgramCache]: Analyzing trace with hash -656359944, now seen corresponding path program 1 times [2020-12-22 07:20:24,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:20:24,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567804114] [2020-12-22 07:20:24,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:20:24,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:20:24,790 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 07:20:24,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567804114] [2020-12-22 07:20:24,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:20:24,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:20:24,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491052363] [2020-12-22 07:20:24,791 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:20:24,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:20:24,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:20:24,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:20:24,792 INFO L87 Difference]: Start difference. First operand 88392 states and 135223 transitions. Second operand 3 states. [2020-12-22 07:20:31,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:20:31,145 INFO L93 Difference]: Finished difference Result 265052 states and 405477 transitions. [2020-12-22 07:20:31,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:20:31,146 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2020-12-22 07:20:31,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:20:31,445 INFO L225 Difference]: With dead ends: 265052 [2020-12-22 07:20:31,445 INFO L226 Difference]: Without dead ends: 176734 [2020-12-22 07:20:31,539 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 07:20:31,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176734 states. [2020-12-22 07:20:36,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176734 to 88400. [2020-12-22 07:20:36,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88400 states. [2020-12-22 07:20:36,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88400 states to 88400 states and 135231 transitions. [2020-12-22 07:20:36,541 INFO L78 Accepts]: Start accepts. Automaton has 88400 states and 135231 transitions. Word has length 77 [2020-12-22 07:20:36,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:20:36,541 INFO L481 AbstractCegarLoop]: Abstraction has 88400 states and 135231 transitions. [2020-12-22 07:20:36,541 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:20:36,541 INFO L276 IsEmpty]: Start isEmpty. Operand 88400 states and 135231 transitions. [2020-12-22 07:20:36,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 07:20:36,543 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:20:36,543 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] [2020-12-22 07:20:36,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 07:20:36,543 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:20:36,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:20:36,544 INFO L82 PathProgramCache]: Analyzing trace with hash 834408617, now seen corresponding path program 1 times [2020-12-22 07:20:36,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:20:36,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437901441] [2020-12-22 07:20:36,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:20:36,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:20:36,641 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 07:20:36,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437901441] [2020-12-22 07:20:36,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:20:36,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:20:36,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884712896] [2020-12-22 07:20:36,643 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:20:36,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:20:36,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:20:36,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:20:36,644 INFO L87 Difference]: Start difference. First operand 88400 states and 135231 transitions. Second operand 4 states. [2020-12-22 07:20:43,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:20:43,488 INFO L93 Difference]: Finished difference Result 261588 states and 399834 transitions. [2020-12-22 07:20:43,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:20:43,489 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 78 [2020-12-22 07:20:43,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:20:43,802 INFO L225 Difference]: With dead ends: 261588 [2020-12-22 07:20:43,802 INFO L226 Difference]: Without dead ends: 173243 [2020-12-22 07:20:43,885 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 07:20:44,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173243 states. [2020-12-22 07:20:51,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173243 to 173241. [2020-12-22 07:20:51,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173241 states. [2020-12-22 07:20:52,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173241 states to 173241 states and 262485 transitions. [2020-12-22 07:20:52,020 INFO L78 Accepts]: Start accepts. Automaton has 173241 states and 262485 transitions. Word has length 78 [2020-12-22 07:20:52,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:20:52,020 INFO L481 AbstractCegarLoop]: Abstraction has 173241 states and 262485 transitions. [2020-12-22 07:20:52,020 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:20:52,021 INFO L276 IsEmpty]: Start isEmpty. Operand 173241 states and 262485 transitions. [2020-12-22 07:20:52,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 07:20:52,023 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:20:52,024 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] [2020-12-22 07:20:52,024 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 07:20:52,024 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:20:52,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:20:52,025 INFO L82 PathProgramCache]: Analyzing trace with hash 640680152, now seen corresponding path program 1 times [2020-12-22 07:20:52,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:20:52,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871617880] [2020-12-22 07:20:52,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:20:52,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:20:52,407 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 07:20:52,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871617880] [2020-12-22 07:20:52,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:20:52,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:20:52,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108887571] [2020-12-22 07:20:52,410 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:20:52,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:20:52,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:20:52,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:20:52,413 INFO L87 Difference]: Start difference. First operand 173241 states and 262485 transitions. Second operand 4 states. [2020-12-22 07:21:06,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:21:06,664 INFO L93 Difference]: Finished difference Result 512789 states and 776319 transitions. [2020-12-22 07:21:06,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:21:06,666 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 78 [2020-12-22 07:21:06,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:21:07,538 INFO L225 Difference]: With dead ends: 512789 [2020-12-22 07:21:07,538 INFO L226 Difference]: Without dead ends: 339707 [2020-12-22 07:21:07,713 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 07:21:07,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339707 states. [2020-12-22 07:21:23,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339707 to 339705. [2020-12-22 07:21:23,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 339705 states. [2020-12-22 07:21:24,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339705 states to 339705 states and 510005 transitions. [2020-12-22 07:21:24,649 INFO L78 Accepts]: Start accepts. Automaton has 339705 states and 510005 transitions. Word has length 78 [2020-12-22 07:21:24,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:21:24,649 INFO L481 AbstractCegarLoop]: Abstraction has 339705 states and 510005 transitions. [2020-12-22 07:21:24,649 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:21:24,649 INFO L276 IsEmpty]: Start isEmpty. Operand 339705 states and 510005 transitions. [2020-12-22 07:21:24,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 07:21:24,654 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:21:24,655 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] [2020-12-22 07:21:24,655 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 07:21:24,655 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:21:24,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:21:24,656 INFO L82 PathProgramCache]: Analyzing trace with hash -1890599668, now seen corresponding path program 1 times [2020-12-22 07:21:24,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:21:24,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173102291] [2020-12-22 07:21:24,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:21:24,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:21:24,696 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 07:21:24,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173102291] [2020-12-22 07:21:24,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:21:24,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:21:24,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350091554] [2020-12-22 07:21:24,697 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:21:24,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:21:24,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:21:24,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:21:24,698 INFO L87 Difference]: Start difference. First operand 339705 states and 510005 transitions. Second operand 3 states. [2020-12-22 07:21:52,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:21:52,811 INFO L93 Difference]: Finished difference Result 1017821 states and 1528423 transitions. [2020-12-22 07:21:52,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:21:52,812 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 07:21:52,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:21:54,588 INFO L225 Difference]: With dead ends: 1017821 [2020-12-22 07:21:54,589 INFO L226 Difference]: Without dead ends: 679179 [2020-12-22 07:21:54,948 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 07:21:55,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679179 states.