/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_opt-floodmax.4.1.ufo.BOUNDED-8.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 07:41:16,832 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 07:41:16,836 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 07:41:16,893 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 07:41:16,893 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 07:41:16,899 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 07:41:16,902 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 07:41:16,911 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 07:41:16,915 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 07:41:16,923 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 07:41:16,924 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 07:41:16,925 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 07:41:16,926 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 07:41:16,929 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 07:41:16,931 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 07:41:16,933 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 07:41:16,933 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 07:41:16,950 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 07:41:16,952 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 07:41:16,957 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 07:41:16,965 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 07:41:16,969 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 07:41:16,971 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 07:41:16,974 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 07:41:16,977 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 07:41:16,990 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 07:41:16,991 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 07:41:16,992 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 07:41:16,998 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 07:41:17,052 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 07:41:17,053 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 07:41:17,058 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 07:41:17,058 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 07:41:17,058 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 07:41:17,059 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 07:41:17,059 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 07:41:17,059 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 07:41:17,059 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 07:41:17,060 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 07:41:17,060 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 07:41:17,060 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 07:41:17,060 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 07:41:17,061 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 07:41:17,061 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 07:41:17,061 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 07:41:17,061 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 07:41:17,061 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:41:17,062 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 07:41:17,062 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 07:41:17,062 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 07:41:17,062 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 07:41:17,062 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 07:41:17,062 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 07:41:17,063 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 07:41:17,063 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 07:41:17,433 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 07:41:17,478 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 07:41:17,482 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 07:41:17,484 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 07:41:17,485 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 07:41:17,486 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4.1.ufo.BOUNDED-8.pals.c [2020-12-22 07:41:17,579 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7b722bd4d/275583d48c074e5aa3d4c950825677fa/FLAG3fd19fc7e [2020-12-22 07:41:18,375 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 07:41:18,375 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4.1.ufo.BOUNDED-8.pals.c [2020-12-22 07:41:18,394 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7b722bd4d/275583d48c074e5aa3d4c950825677fa/FLAG3fd19fc7e [2020-12-22 07:41:18,673 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7b722bd4d/275583d48c074e5aa3d4c950825677fa [2020-12-22 07:41:18,682 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 07:41:18,684 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 07:41:18,687 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 07:41:18,688 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 07:41:18,692 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 07:41:18,693 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:41:18" (1/1) ... [2020-12-22 07:41:18,696 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a0a8065 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:41:18, skipping insertion in model container [2020-12-22 07:41:18,696 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:41:18" (1/1) ... [2020-12-22 07:41:18,705 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 07:41:18,784 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 07:41:19,146 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_opt-floodmax.4.1.ufo.BOUNDED-8.pals.c[26618,26631] [2020-12-22 07:41:19,152 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:41:19,164 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 07:41:19,309 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_opt-floodmax.4.1.ufo.BOUNDED-8.pals.c[26618,26631] [2020-12-22 07:41:19,310 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:41:19,333 INFO L208 MainTranslator]: Completed translation [2020-12-22 07:41:19,334 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:41:19 WrapperNode [2020-12-22 07:41:19,334 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 07:41:19,335 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 07:41:19,335 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 07:41:19,336 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 07:41:19,344 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:41:19" (1/1) ... [2020-12-22 07:41:19,401 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:41:19" (1/1) ... [2020-12-22 07:41:19,506 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 07:41:19,507 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 07:41:19,507 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 07:41:19,507 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 07:41:19,520 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:41:19" (1/1) ... [2020-12-22 07:41:19,520 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:41:19" (1/1) ... [2020-12-22 07:41:19,533 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:41:19" (1/1) ... [2020-12-22 07:41:19,533 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:41:19" (1/1) ... [2020-12-22 07:41:19,574 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:41:19" (1/1) ... [2020-12-22 07:41:19,611 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:41:19" (1/1) ... [2020-12-22 07:41:19,621 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:41:19" (1/1) ... [2020-12-22 07:41:19,639 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 07:41:19,640 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 07:41:19,641 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 07:41:19,641 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 07:41:19,642 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:41:19" (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 07:41:19,747 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 07:41:19,748 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 07:41:19,748 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 07:41:19,748 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 07:41:21,002 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 07:41:21,003 INFO L299 CfgBuilder]: Removed 21 assume(true) statements. [2020-12-22 07:41:21,006 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:41:21 BoogieIcfgContainer [2020-12-22 07:41:21,006 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 07:41:21,008 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 07:41:21,009 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 07:41:21,012 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 07:41:21,014 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:41:18" (1/3) ... [2020-12-22 07:41:21,015 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@638b526f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:41:21, skipping insertion in model container [2020-12-22 07:41:21,015 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:41:19" (2/3) ... [2020-12-22 07:41:21,015 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@638b526f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:41:21, skipping insertion in model container [2020-12-22 07:41:21,016 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:41:21" (3/3) ... [2020-12-22 07:41:21,017 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.1.ufo.BOUNDED-8.pals.c [2020-12-22 07:41:21,024 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 07:41:21,030 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 07:41:21,047 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 07:41:21,076 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 07:41:21,076 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 07:41:21,076 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 07:41:21,076 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 07:41:21,077 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 07:41:21,077 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 07:41:21,077 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 07:41:21,077 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 07:41:21,099 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states. [2020-12-22 07:41:21,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 07:41:21,114 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:41:21,115 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 07:41:21,115 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:41:21,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:41:21,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1445812, now seen corresponding path program 1 times [2020-12-22 07:41:21,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:41:21,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967592922] [2020-12-22 07:41:21,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:41:21,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:41:21,543 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 07:41:21,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967592922] [2020-12-22 07:41:21,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:41:21,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:41:21,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094128172] [2020-12-22 07:41:21,550 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 07:41:21,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:41:21,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 07:41:21,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:41:21,568 INFO L87 Difference]: Start difference. First operand 312 states. Second operand 2 states. [2020-12-22 07:41:21,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:41:21,616 INFO L93 Difference]: Finished difference Result 441 states and 778 transitions. [2020-12-22 07:41:21,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 07:41:21,617 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 77 [2020-12-22 07:41:21,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:41:21,634 INFO L225 Difference]: With dead ends: 441 [2020-12-22 07:41:21,634 INFO L226 Difference]: Without dead ends: 308 [2020-12-22 07:41:21,638 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 07:41:21,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2020-12-22 07:41:21,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 308. [2020-12-22 07:41:21,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 308 states. [2020-12-22 07:41:21,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 551 transitions. [2020-12-22 07:41:21,710 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 551 transitions. Word has length 77 [2020-12-22 07:41:21,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:41:21,711 INFO L481 AbstractCegarLoop]: Abstraction has 308 states and 551 transitions. [2020-12-22 07:41:21,711 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 07:41:21,711 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 551 transitions. [2020-12-22 07:41:21,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 07:41:21,721 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:41:21,721 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 07:41:21,722 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 07:41:21,724 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:41:21,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:41:21,726 INFO L82 PathProgramCache]: Analyzing trace with hash -135459318, now seen corresponding path program 1 times [2020-12-22 07:41:21,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:41:21,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234466416] [2020-12-22 07:41:21,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:41:21,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:41:21,946 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 07:41:21,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234466416] [2020-12-22 07:41:21,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:41:21,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:41:21,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781912537] [2020-12-22 07:41:21,950 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:41:21,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:41:21,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:41:21,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:41:21,952 INFO L87 Difference]: Start difference. First operand 308 states and 551 transitions. Second operand 5 states. [2020-12-22 07:41:22,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:41:22,127 INFO L93 Difference]: Finished difference Result 436 states and 768 transitions. [2020-12-22 07:41:22,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 07:41:22,128 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 77 [2020-12-22 07:41:22,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:41:22,136 INFO L225 Difference]: With dead ends: 436 [2020-12-22 07:41:22,136 INFO L226 Difference]: Without dead ends: 308 [2020-12-22 07:41:22,141 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 07:41:22,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2020-12-22 07:41:22,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 308. [2020-12-22 07:41:22,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 308 states. [2020-12-22 07:41:22,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 517 transitions. [2020-12-22 07:41:22,179 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 517 transitions. Word has length 77 [2020-12-22 07:41:22,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:41:22,179 INFO L481 AbstractCegarLoop]: Abstraction has 308 states and 517 transitions. [2020-12-22 07:41:22,179 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:41:22,180 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 517 transitions. [2020-12-22 07:41:22,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-12-22 07:41:22,191 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:41:22,192 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:41:22,192 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 07:41:22,192 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:41:22,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:41:22,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1547820362, now seen corresponding path program 1 times [2020-12-22 07:41:22,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:41:22,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896537777] [2020-12-22 07:41:22,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:41:22,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:41:22,420 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 07:41:22,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896537777] [2020-12-22 07:41:22,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:41:22,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:41:22,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101093222] [2020-12-22 07:41:22,422 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:41:22,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:41:22,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:41:22,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:41:22,424 INFO L87 Difference]: Start difference. First operand 308 states and 517 transitions. Second operand 3 states. [2020-12-22 07:41:22,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:41:22,482 INFO L93 Difference]: Finished difference Result 544 states and 921 transitions. [2020-12-22 07:41:22,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:41:22,483 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 110 [2020-12-22 07:41:22,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:41:22,486 INFO L225 Difference]: With dead ends: 544 [2020-12-22 07:41:22,487 INFO L226 Difference]: Without dead ends: 420 [2020-12-22 07:41:22,488 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 07:41:22,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2020-12-22 07:41:22,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 418. [2020-12-22 07:41:22,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 418 states. [2020-12-22 07:41:22,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 702 transitions. [2020-12-22 07:41:22,506 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 702 transitions. Word has length 110 [2020-12-22 07:41:22,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:41:22,507 INFO L481 AbstractCegarLoop]: Abstraction has 418 states and 702 transitions. [2020-12-22 07:41:22,507 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:41:22,507 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 702 transitions. [2020-12-22 07:41:22,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-12-22 07:41:22,509 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:41:22,510 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:41:22,510 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 07:41:22,510 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:41:22,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:41:22,511 INFO L82 PathProgramCache]: Analyzing trace with hash -2146366683, now seen corresponding path program 1 times [2020-12-22 07:41:22,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:41:22,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849057079] [2020-12-22 07:41:22,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:41:22,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:41:22,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:41:22,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849057079] [2020-12-22 07:41:22,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:41:22,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:41:22,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436033485] [2020-12-22 07:41:22,634 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:41:22,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:41:22,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:41:22,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:41:22,635 INFO L87 Difference]: Start difference. First operand 418 states and 702 transitions. Second operand 3 states. [2020-12-22 07:41:22,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:41:22,669 INFO L93 Difference]: Finished difference Result 866 states and 1462 transitions. [2020-12-22 07:41:22,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:41:22,669 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 113 [2020-12-22 07:41:22,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:41:22,674 INFO L225 Difference]: With dead ends: 866 [2020-12-22 07:41:22,674 INFO L226 Difference]: Without dead ends: 632 [2020-12-22 07:41:22,675 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 07:41:22,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2020-12-22 07:41:22,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 630. [2020-12-22 07:41:22,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 630 states. [2020-12-22 07:41:22,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 630 states to 630 states and 1061 transitions. [2020-12-22 07:41:22,701 INFO L78 Accepts]: Start accepts. Automaton has 630 states and 1061 transitions. Word has length 113 [2020-12-22 07:41:22,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:41:22,702 INFO L481 AbstractCegarLoop]: Abstraction has 630 states and 1061 transitions. [2020-12-22 07:41:22,702 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:41:22,702 INFO L276 IsEmpty]: Start isEmpty. Operand 630 states and 1061 transitions. [2020-12-22 07:41:22,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-12-22 07:41:22,704 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:41:22,705 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:41:22,705 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 07:41:22,705 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:41:22,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:41:22,706 INFO L82 PathProgramCache]: Analyzing trace with hash 767519678, now seen corresponding path program 1 times [2020-12-22 07:41:22,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:41:22,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959242794] [2020-12-22 07:41:22,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:41:22,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:41:22,967 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 07:41:22,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959242794] [2020-12-22 07:41:22,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:41:22,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:41:22,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407309227] [2020-12-22 07:41:22,970 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:41:22,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:41:22,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:41:22,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:41:22,976 INFO L87 Difference]: Start difference. First operand 630 states and 1061 transitions. Second operand 3 states. [2020-12-22 07:41:23,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:41:23,054 INFO L93 Difference]: Finished difference Result 1482 states and 2503 transitions. [2020-12-22 07:41:23,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:41:23,055 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 116 [2020-12-22 07:41:23,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:41:23,069 INFO L225 Difference]: With dead ends: 1482 [2020-12-22 07:41:23,069 INFO L226 Difference]: Without dead ends: 1036 [2020-12-22 07:41:23,071 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 07:41:23,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1036 states. [2020-12-22 07:41:23,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1036 to 1034. [2020-12-22 07:41:23,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1034 states. [2020-12-22 07:41:23,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 1741 transitions. [2020-12-22 07:41:23,131 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 1741 transitions. Word has length 116 [2020-12-22 07:41:23,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:41:23,132 INFO L481 AbstractCegarLoop]: Abstraction has 1034 states and 1741 transitions. [2020-12-22 07:41:23,133 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:41:23,133 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 1741 transitions. [2020-12-22 07:41:23,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-12-22 07:41:23,137 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:41:23,138 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:41:23,138 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 07:41:23,138 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:41:23,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:41:23,139 INFO L82 PathProgramCache]: Analyzing trace with hash -1185652755, now seen corresponding path program 1 times [2020-12-22 07:41:23,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:41:23,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789676255] [2020-12-22 07:41:23,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:41:23,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:41:23,324 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 07:41:23,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789676255] [2020-12-22 07:41:23,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:41:23,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:41:23,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093759079] [2020-12-22 07:41:23,327 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:41:23,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:41:23,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:41:23,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:41:23,330 INFO L87 Difference]: Start difference. First operand 1034 states and 1741 transitions. Second operand 3 states. [2020-12-22 07:41:23,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:41:23,401 INFO L93 Difference]: Finished difference Result 2654 states and 4471 transitions. [2020-12-22 07:41:23,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:41:23,402 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 119 [2020-12-22 07:41:23,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:41:23,412 INFO L225 Difference]: With dead ends: 2654 [2020-12-22 07:41:23,412 INFO L226 Difference]: Without dead ends: 1804 [2020-12-22 07:41:23,414 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 07:41:23,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1804 states. [2020-12-22 07:41:23,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1804 to 1802. [2020-12-22 07:41:23,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1802 states. [2020-12-22 07:41:23,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1802 states to 1802 states and 3025 transitions. [2020-12-22 07:41:23,480 INFO L78 Accepts]: Start accepts. Automaton has 1802 states and 3025 transitions. Word has length 119 [2020-12-22 07:41:23,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:41:23,480 INFO L481 AbstractCegarLoop]: Abstraction has 1802 states and 3025 transitions. [2020-12-22 07:41:23,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:41:23,481 INFO L276 IsEmpty]: Start isEmpty. Operand 1802 states and 3025 transitions. [2020-12-22 07:41:23,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-12-22 07:41:23,484 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:41:23,484 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:41:23,484 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 07:41:23,484 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:41:23,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:41:23,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1443494714, now seen corresponding path program 1 times [2020-12-22 07:41:23,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:41:23,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896658393] [2020-12-22 07:41:23,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:41:23,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:41:23,746 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 07:41:23,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896658393] [2020-12-22 07:41:23,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:41:23,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 07:41:23,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924204818] [2020-12-22 07:41:23,749 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 07:41:23,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:41:23,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 07:41:23,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:41:23,750 INFO L87 Difference]: Start difference. First operand 1802 states and 3025 transitions. Second operand 6 states. [2020-12-22 07:41:23,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:41:23,998 INFO L93 Difference]: Finished difference Result 7236 states and 12222 transitions. [2020-12-22 07:41:23,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:41:23,998 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 122 [2020-12-22 07:41:23,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:41:24,029 INFO L225 Difference]: With dead ends: 7236 [2020-12-22 07:41:24,030 INFO L226 Difference]: Without dead ends: 5618 [2020-12-22 07:41:24,035 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:41:24,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5618 states. [2020-12-22 07:41:24,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5618 to 3338. [2020-12-22 07:41:24,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3338 states. [2020-12-22 07:41:24,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3338 states to 3338 states and 5593 transitions. [2020-12-22 07:41:24,219 INFO L78 Accepts]: Start accepts. Automaton has 3338 states and 5593 transitions. Word has length 122 [2020-12-22 07:41:24,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:41:24,219 INFO L481 AbstractCegarLoop]: Abstraction has 3338 states and 5593 transitions. [2020-12-22 07:41:24,220 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 07:41:24,220 INFO L276 IsEmpty]: Start isEmpty. Operand 3338 states and 5593 transitions. [2020-12-22 07:41:24,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-12-22 07:41:24,224 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:41:24,225 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:41:24,225 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 07:41:24,225 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:41:24,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:41:24,226 INFO L82 PathProgramCache]: Analyzing trace with hash 401697485, now seen corresponding path program 1 times [2020-12-22 07:41:24,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:41:24,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024604272] [2020-12-22 07:41:24,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:41:24,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:41:24,380 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 07:41:24,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024604272] [2020-12-22 07:41:24,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:41:24,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:41:24,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444426788] [2020-12-22 07:41:24,381 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:41:24,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:41:24,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:41:24,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:41:24,383 INFO L87 Difference]: Start difference. First operand 3338 states and 5593 transitions. Second operand 4 states. [2020-12-22 07:41:24,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:41:24,577 INFO L93 Difference]: Finished difference Result 8972 states and 15117 transitions. [2020-12-22 07:41:24,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:41:24,577 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 123 [2020-12-22 07:41:24,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:41:24,609 INFO L225 Difference]: With dead ends: 8972 [2020-12-22 07:41:24,610 INFO L226 Difference]: Without dead ends: 5818 [2020-12-22 07:41:24,616 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 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 07:41:24,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5818 states. [2020-12-22 07:41:24,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5818 to 4943. [2020-12-22 07:41:24,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4943 states. [2020-12-22 07:41:24,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4943 states to 4943 states and 8298 transitions. [2020-12-22 07:41:24,879 INFO L78 Accepts]: Start accepts. Automaton has 4943 states and 8298 transitions. Word has length 123 [2020-12-22 07:41:24,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:41:24,880 INFO L481 AbstractCegarLoop]: Abstraction has 4943 states and 8298 transitions. [2020-12-22 07:41:24,880 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:41:24,880 INFO L276 IsEmpty]: Start isEmpty. Operand 4943 states and 8298 transitions. [2020-12-22 07:41:24,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-12-22 07:41:24,886 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:41:24,886 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:41:24,886 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 07:41:24,886 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:41:24,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:41:24,887 INFO L82 PathProgramCache]: Analyzing trace with hash -1728148576, now seen corresponding path program 1 times [2020-12-22 07:41:24,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:41:24,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215654236] [2020-12-22 07:41:24,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:41:24,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:41:25,017 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 07:41:25,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215654236] [2020-12-22 07:41:25,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:41:25,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:41:25,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894375296] [2020-12-22 07:41:25,025 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:41:25,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:41:25,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:41:25,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:41:25,029 INFO L87 Difference]: Start difference. First operand 4943 states and 8298 transitions. Second operand 3 states. [2020-12-22 07:41:25,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:41:25,255 INFO L93 Difference]: Finished difference Result 10854 states and 18311 transitions. [2020-12-22 07:41:25,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:41:25,256 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 124 [2020-12-22 07:41:25,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:41:25,321 INFO L225 Difference]: With dead ends: 10854 [2020-12-22 07:41:25,321 INFO L226 Difference]: Without dead ends: 7535 [2020-12-22 07:41:25,332 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 07:41:25,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7535 states. [2020-12-22 07:41:25,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7535 to 7533. [2020-12-22 07:41:25,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7533 states. [2020-12-22 07:41:25,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7533 states to 7533 states and 12637 transitions. [2020-12-22 07:41:25,668 INFO L78 Accepts]: Start accepts. Automaton has 7533 states and 12637 transitions. Word has length 124 [2020-12-22 07:41:25,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:41:25,668 INFO L481 AbstractCegarLoop]: Abstraction has 7533 states and 12637 transitions. [2020-12-22 07:41:25,668 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:41:25,669 INFO L276 IsEmpty]: Start isEmpty. Operand 7533 states and 12637 transitions. [2020-12-22 07:41:25,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-12-22 07:41:25,671 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:41:25,672 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:41:25,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 07:41:25,672 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:41:25,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:41:25,673 INFO L82 PathProgramCache]: Analyzing trace with hash -404829920, now seen corresponding path program 1 times [2020-12-22 07:41:25,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:41:25,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553812204] [2020-12-22 07:41:25,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:41:25,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:41:25,786 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 07:41:25,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553812204] [2020-12-22 07:41:25,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:41:25,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:41:25,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877424727] [2020-12-22 07:41:25,788 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:41:25,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:41:25,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:41:25,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:41:25,793 INFO L87 Difference]: Start difference. First operand 7533 states and 12637 transitions. Second operand 3 states. [2020-12-22 07:41:26,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:41:26,064 INFO L93 Difference]: Finished difference Result 14608 states and 24516 transitions. [2020-12-22 07:41:26,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:41:26,067 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 124 [2020-12-22 07:41:26,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:41:26,094 INFO L225 Difference]: With dead ends: 14608 [2020-12-22 07:41:26,094 INFO L226 Difference]: Without dead ends: 10614 [2020-12-22 07:41:26,105 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 07:41:26,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10614 states. [2020-12-22 07:41:26,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10614 to 10612. [2020-12-22 07:41:26,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10612 states. [2020-12-22 07:41:26,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10612 states to 10612 states and 17731 transitions. [2020-12-22 07:41:26,520 INFO L78 Accepts]: Start accepts. Automaton has 10612 states and 17731 transitions. Word has length 124 [2020-12-22 07:41:26,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:41:26,520 INFO L481 AbstractCegarLoop]: Abstraction has 10612 states and 17731 transitions. [2020-12-22 07:41:26,520 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:41:26,520 INFO L276 IsEmpty]: Start isEmpty. Operand 10612 states and 17731 transitions. [2020-12-22 07:41:26,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-12-22 07:41:26,522 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:41:26,523 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:41:26,523 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 07:41:26,523 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:41:26,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:41:26,524 INFO L82 PathProgramCache]: Analyzing trace with hash -1992868756, now seen corresponding path program 1 times [2020-12-22 07:41:26,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:41:26,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615908226] [2020-12-22 07:41:26,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:41:26,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:41:26,695 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 07:41:26,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615908226] [2020-12-22 07:41:26,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:41:26,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:41:26,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902989129] [2020-12-22 07:41:26,697 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:41:26,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:41:26,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:41:26,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:41:26,698 INFO L87 Difference]: Start difference. First operand 10612 states and 17731 transitions. Second operand 3 states. [2020-12-22 07:41:27,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:41:27,008 INFO L93 Difference]: Finished difference Result 20440 states and 34171 transitions. [2020-12-22 07:41:27,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:41:27,009 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 124 [2020-12-22 07:41:27,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:41:27,049 INFO L225 Difference]: With dead ends: 20440 [2020-12-22 07:41:27,049 INFO L226 Difference]: Without dead ends: 14830 [2020-12-22 07:41:27,064 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 07:41:27,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14830 states. [2020-12-22 07:41:27,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14830 to 14828. [2020-12-22 07:41:27,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14828 states. [2020-12-22 07:41:27,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14828 states to 14828 states and 24666 transitions. [2020-12-22 07:41:27,727 INFO L78 Accepts]: Start accepts. Automaton has 14828 states and 24666 transitions. Word has length 124 [2020-12-22 07:41:27,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:41:27,728 INFO L481 AbstractCegarLoop]: Abstraction has 14828 states and 24666 transitions. [2020-12-22 07:41:27,728 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:41:27,728 INFO L276 IsEmpty]: Start isEmpty. Operand 14828 states and 24666 transitions. [2020-12-22 07:41:27,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-12-22 07:41:27,730 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:41:27,731 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:41:27,731 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 07:41:27,731 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:41:27,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:41:27,732 INFO L82 PathProgramCache]: Analyzing trace with hash 1937085149, now seen corresponding path program 1 times [2020-12-22 07:41:27,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:41:27,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629434066] [2020-12-22 07:41:27,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:41:27,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:41:27,887 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 07:41:27,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629434066] [2020-12-22 07:41:27,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:41:27,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:41:27,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226897672] [2020-12-22 07:41:27,889 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:41:27,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:41:27,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:41:27,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:41:27,891 INFO L87 Difference]: Start difference. First operand 14828 states and 24666 transitions. Second operand 4 states. [2020-12-22 07:41:28,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:41:28,582 INFO L93 Difference]: Finished difference Result 40623 states and 67786 transitions. [2020-12-22 07:41:28,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:41:28,583 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 124 [2020-12-22 07:41:28,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:41:28,673 INFO L225 Difference]: With dead ends: 40623 [2020-12-22 07:41:28,673 INFO L226 Difference]: Without dead ends: 26076 [2020-12-22 07:41:28,710 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 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 07:41:28,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26076 states. [2020-12-22 07:41:29,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26076 to 22333. [2020-12-22 07:41:29,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22333 states. [2020-12-22 07:41:29,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22333 states to 22333 states and 37054 transitions. [2020-12-22 07:41:29,642 INFO L78 Accepts]: Start accepts. Automaton has 22333 states and 37054 transitions. Word has length 124 [2020-12-22 07:41:29,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:41:29,642 INFO L481 AbstractCegarLoop]: Abstraction has 22333 states and 37054 transitions. [2020-12-22 07:41:29,642 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:41:29,643 INFO L276 IsEmpty]: Start isEmpty. Operand 22333 states and 37054 transitions. [2020-12-22 07:41:29,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-12-22 07:41:29,644 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:41:29,645 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:41:29,645 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 07:41:29,645 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:41:29,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:41:29,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1043679724, now seen corresponding path program 1 times [2020-12-22 07:41:29,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:41:29,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816413252] [2020-12-22 07:41:29,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:41:29,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:41:29,738 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 07:41:29,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816413252] [2020-12-22 07:41:29,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:41:29,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:41:29,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541815161] [2020-12-22 07:41:29,739 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:41:29,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:41:29,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:41:29,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:41:29,741 INFO L87 Difference]: Start difference. First operand 22333 states and 37054 transitions. Second operand 3 states. [2020-12-22 07:41:30,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:41:30,715 INFO L93 Difference]: Finished difference Result 48832 states and 81000 transitions. [2020-12-22 07:41:30,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:41:30,721 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 124 [2020-12-22 07:41:30,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:41:30,825 INFO L225 Difference]: With dead ends: 48832 [2020-12-22 07:41:30,826 INFO L226 Difference]: Without dead ends: 33436 [2020-12-22 07:41:30,862 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 07:41:30,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33436 states. [2020-12-22 07:41:31,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33436 to 33434. [2020-12-22 07:41:31,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33434 states. [2020-12-22 07:41:32,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33434 states to 33434 states and 55117 transitions. [2020-12-22 07:41:32,239 INFO L78 Accepts]: Start accepts. Automaton has 33434 states and 55117 transitions. Word has length 124 [2020-12-22 07:41:32,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:41:32,239 INFO L481 AbstractCegarLoop]: Abstraction has 33434 states and 55117 transitions. [2020-12-22 07:41:32,239 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:41:32,239 INFO L276 IsEmpty]: Start isEmpty. Operand 33434 states and 55117 transitions. [2020-12-22 07:41:32,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-12-22 07:41:32,241 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:41:32,241 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:41:32,242 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 07:41:32,242 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:41:32,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:41:32,243 INFO L82 PathProgramCache]: Analyzing trace with hash -1836500476, now seen corresponding path program 1 times [2020-12-22 07:41:32,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:41:32,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606545093] [2020-12-22 07:41:32,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:41:32,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:41:32,487 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 07:41:32,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606545093] [2020-12-22 07:41:32,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:41:32,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:41:32,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798397109] [2020-12-22 07:41:32,489 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:41:32,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:41:32,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:41:32,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:41:32,490 INFO L87 Difference]: Start difference. First operand 33434 states and 55117 transitions. Second operand 4 states. [2020-12-22 07:41:34,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:41:34,083 INFO L93 Difference]: Finished difference Result 97502 states and 161020 transitions. [2020-12-22 07:41:34,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:41:34,084 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 125 [2020-12-22 07:41:34,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:41:34,259 INFO L225 Difference]: With dead ends: 97502 [2020-12-22 07:41:34,260 INFO L226 Difference]: Without dead ends: 64302 [2020-12-22 07:41:34,326 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 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 07:41:34,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64302 states. [2020-12-22 07:41:36,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64302 to 54325. [2020-12-22 07:41:36,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54325 states. [2020-12-22 07:41:36,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54325 states to 54325 states and 89177 transitions. [2020-12-22 07:41:36,217 INFO L78 Accepts]: Start accepts. Automaton has 54325 states and 89177 transitions. Word has length 125 [2020-12-22 07:41:36,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:41:36,218 INFO L481 AbstractCegarLoop]: Abstraction has 54325 states and 89177 transitions. [2020-12-22 07:41:36,218 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:41:36,218 INFO L276 IsEmpty]: Start isEmpty. Operand 54325 states and 89177 transitions. [2020-12-22 07:41:36,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-12-22 07:41:36,220 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:41:36,220 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:41:36,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 07:41:36,221 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:41:36,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:41:36,222 INFO L82 PathProgramCache]: Analyzing trace with hash 1610433780, now seen corresponding path program 1 times [2020-12-22 07:41:36,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:41:36,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111440733] [2020-12-22 07:41:36,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:41:36,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:41:36,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:41:36,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111440733] [2020-12-22 07:41:36,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:41:36,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:41:36,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809841021] [2020-12-22 07:41:36,355 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:41:36,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:41:36,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:41:36,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:41:36,356 INFO L87 Difference]: Start difference. First operand 54325 states and 89177 transitions. Second operand 4 states. [2020-12-22 07:41:38,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:41:38,647 INFO L93 Difference]: Finished difference Result 160056 states and 263175 transitions. [2020-12-22 07:41:38,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:41:38,647 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 126 [2020-12-22 07:41:38,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:41:39,059 INFO L225 Difference]: With dead ends: 160056 [2020-12-22 07:41:39,059 INFO L226 Difference]: Without dead ends: 105965 [2020-12-22 07:41:39,174 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 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 07:41:39,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105965 states. [2020-12-22 07:41:41,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105965 to 87188. [2020-12-22 07:41:41,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87188 states. [2020-12-22 07:41:41,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87188 states to 87188 states and 142537 transitions. [2020-12-22 07:41:41,785 INFO L78 Accepts]: Start accepts. Automaton has 87188 states and 142537 transitions. Word has length 126 [2020-12-22 07:41:41,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:41:41,785 INFO L481 AbstractCegarLoop]: Abstraction has 87188 states and 142537 transitions. [2020-12-22 07:41:41,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:41:41,786 INFO L276 IsEmpty]: Start isEmpty. Operand 87188 states and 142537 transitions. [2020-12-22 07:41:41,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-12-22 07:41:41,788 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:41:41,788 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:41:41,788 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 07:41:41,789 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:41:41,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:41:41,789 INFO L82 PathProgramCache]: Analyzing trace with hash -777514292, now seen corresponding path program 1 times [2020-12-22 07:41:41,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:41:41,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003738859] [2020-12-22 07:41:41,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:41:42,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:41:42,390 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 07:41:42,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003738859] [2020-12-22 07:41:42,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:41:42,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 07:41:42,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471422965] [2020-12-22 07:41:42,392 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 07:41:42,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:41:42,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 07:41:42,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:41:42,393 INFO L87 Difference]: Start difference. First operand 87188 states and 142537 transitions. Second operand 6 states. [2020-12-22 07:41:45,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:41:45,301 INFO L93 Difference]: Finished difference Result 219208 states and 359842 transitions. [2020-12-22 07:41:45,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:41:45,302 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 128 [2020-12-22 07:41:45,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:41:45,888 INFO L225 Difference]: With dead ends: 219208 [2020-12-22 07:41:45,888 INFO L226 Difference]: Without dead ends: 132254 [2020-12-22 07:41:45,980 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:41:46,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132254 states. [2020-12-22 07:41:48,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132254 to 87188. [2020-12-22 07:41:48,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87188 states. [2020-12-22 07:41:48,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87188 states to 87188 states and 141912 transitions. [2020-12-22 07:41:48,795 INFO L78 Accepts]: Start accepts. Automaton has 87188 states and 141912 transitions. Word has length 128 [2020-12-22 07:41:48,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:41:48,795 INFO L481 AbstractCegarLoop]: Abstraction has 87188 states and 141912 transitions. [2020-12-22 07:41:48,795 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 07:41:48,795 INFO L276 IsEmpty]: Start isEmpty. Operand 87188 states and 141912 transitions. [2020-12-22 07:41:48,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-12-22 07:41:48,797 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:41:48,797 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:41:48,797 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 07:41:48,798 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:41:48,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:41:48,798 INFO L82 PathProgramCache]: Analyzing trace with hash -1216965369, now seen corresponding path program 1 times [2020-12-22 07:41:48,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:41:48,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15620843] [2020-12-22 07:41:48,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:41:48,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:41:49,025 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 07:41:49,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15620843] [2020-12-22 07:41:49,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:41:49,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 07:41:49,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027045944] [2020-12-22 07:41:49,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 07:41:49,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:41:49,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 07:41:49,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:41:49,028 INFO L87 Difference]: Start difference. First operand 87188 states and 141912 transitions. Second operand 6 states. [2020-12-22 07:41:53,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:41:53,800 INFO L93 Difference]: Finished difference Result 290418 states and 475405 transitions. [2020-12-22 07:41:53,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:41:53,800 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 131 [2020-12-22 07:41:53,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:41:54,263 INFO L225 Difference]: With dead ends: 290418 [2020-12-22 07:41:54,263 INFO L226 Difference]: Without dead ends: 203464 [2020-12-22 07:41:54,361 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:41:54,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203464 states. [2020-12-22 07:41:58,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203464 to 127748. [2020-12-22 07:41:58,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127748 states. [2020-12-22 07:41:59,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127748 states to 127748 states and 207783 transitions. [2020-12-22 07:41:59,069 INFO L78 Accepts]: Start accepts. Automaton has 127748 states and 207783 transitions. Word has length 131 [2020-12-22 07:41:59,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:41:59,070 INFO L481 AbstractCegarLoop]: Abstraction has 127748 states and 207783 transitions. [2020-12-22 07:41:59,070 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 07:41:59,070 INFO L276 IsEmpty]: Start isEmpty. Operand 127748 states and 207783 transitions. [2020-12-22 07:41:59,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-12-22 07:41:59,078 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:41:59,079 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:41:59,079 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 07:41:59,079 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:41:59,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:41:59,080 INFO L82 PathProgramCache]: Analyzing trace with hash 497433909, now seen corresponding path program 1 times [2020-12-22 07:41:59,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:41:59,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998922157] [2020-12-22 07:41:59,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:41:59,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:41:59,308 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 07:41:59,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998922157] [2020-12-22 07:41:59,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:41:59,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 07:41:59,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838586549] [2020-12-22 07:41:59,310 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 07:41:59,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:41:59,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 07:41:59,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 07:41:59,311 INFO L87 Difference]: Start difference. First operand 127748 states and 207783 transitions. Second operand 8 states. [2020-12-22 07:42:06,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:42:06,339 INFO L93 Difference]: Finished difference Result 259982 states and 418834 transitions. [2020-12-22 07:42:06,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 07:42:06,339 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 132 [2020-12-22 07:42:06,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:42:07,031 INFO L225 Difference]: With dead ends: 259982 [2020-12-22 07:42:07,031 INFO L226 Difference]: Without dead ends: 259980 [2020-12-22 07:42:07,104 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 07:42:07,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259980 states. [2020-12-22 07:42:12,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259980 to 132806. [2020-12-22 07:42:12,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132806 states. [2020-12-22 07:42:12,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132806 states to 132806 states and 212814 transitions. [2020-12-22 07:42:12,868 INFO L78 Accepts]: Start accepts. Automaton has 132806 states and 212814 transitions. Word has length 132 [2020-12-22 07:42:12,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:42:12,869 INFO L481 AbstractCegarLoop]: Abstraction has 132806 states and 212814 transitions. [2020-12-22 07:42:12,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 07:42:12,869 INFO L276 IsEmpty]: Start isEmpty. Operand 132806 states and 212814 transitions. [2020-12-22 07:42:12,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-12-22 07:42:12,877 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:42:12,878 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:42:12,878 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 07:42:12,878 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:42:12,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:42:12,879 INFO L82 PathProgramCache]: Analyzing trace with hash 775633267, now seen corresponding path program 1 times [2020-12-22 07:42:12,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:42:12,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563651047] [2020-12-22 07:42:12,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:42:12,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:42:13,058 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 07:42:13,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563651047] [2020-12-22 07:42:13,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:42:13,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 07:42:13,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855534076] [2020-12-22 07:42:13,059 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 07:42:13,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:42:13,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 07:42:13,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:42:13,060 INFO L87 Difference]: Start difference. First operand 132806 states and 212814 transitions. Second operand 6 states. [2020-12-22 07:42:18,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:42:18,374 INFO L93 Difference]: Finished difference Result 214646 states and 346645 transitions. [2020-12-22 07:42:18,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:42:18,374 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 168 [2020-12-22 07:42:18,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:42:18,709 INFO L225 Difference]: With dead ends: 214646 [2020-12-22 07:42:18,709 INFO L226 Difference]: Without dead ends: 175844 [2020-12-22 07:42:18,762 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:42:18,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175844 states. [2020-12-22 07:42:24,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175844 to 148048. [2020-12-22 07:42:24,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148048 states. [2020-12-22 07:42:24,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148048 states to 148048 states and 237054 transitions. [2020-12-22 07:42:24,559 INFO L78 Accepts]: Start accepts. Automaton has 148048 states and 237054 transitions. Word has length 168 [2020-12-22 07:42:24,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:42:24,560 INFO L481 AbstractCegarLoop]: Abstraction has 148048 states and 237054 transitions. [2020-12-22 07:42:24,560 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 07:42:24,560 INFO L276 IsEmpty]: Start isEmpty. Operand 148048 states and 237054 transitions. [2020-12-22 07:42:24,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-12-22 07:42:24,569 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:42:24,569 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:42:24,570 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 07:42:24,570 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:42:24,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:42:24,571 INFO L82 PathProgramCache]: Analyzing trace with hash 2098951923, now seen corresponding path program 1 times [2020-12-22 07:42:24,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:42:24,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003852962] [2020-12-22 07:42:24,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:42:24,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:42:24,757 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 07:42:24,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003852962] [2020-12-22 07:42:24,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:42:24,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 07:42:24,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469438712] [2020-12-22 07:42:24,759 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 07:42:24,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:42:24,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 07:42:24,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:42:24,760 INFO L87 Difference]: Start difference. First operand 148048 states and 237054 transitions. Second operand 6 states. [2020-12-22 07:42:31,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:42:31,002 INFO L93 Difference]: Finished difference Result 239032 states and 385475 transitions. [2020-12-22 07:42:31,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:42:31,002 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 168 [2020-12-22 07:42:31,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:42:31,429 INFO L225 Difference]: With dead ends: 239032 [2020-12-22 07:42:31,429 INFO L226 Difference]: Without dead ends: 200430 [2020-12-22 07:42:31,503 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:42:31,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200430 states. [2020-12-22 07:42:37,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200430 to 163226. [2020-12-22 07:42:37,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163226 states. [2020-12-22 07:42:38,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163226 states to 163226 states and 261646 transitions. [2020-12-22 07:42:38,191 INFO L78 Accepts]: Start accepts. Automaton has 163226 states and 261646 transitions. Word has length 168 [2020-12-22 07:42:38,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:42:38,191 INFO L481 AbstractCegarLoop]: Abstraction has 163226 states and 261646 transitions. [2020-12-22 07:42:38,191 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 07:42:38,192 INFO L276 IsEmpty]: Start isEmpty. Operand 163226 states and 261646 transitions. [2020-12-22 07:42:38,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-12-22 07:42:38,199 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:42:38,200 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:42:38,200 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 07:42:38,200 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:42:38,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:42:38,201 INFO L82 PathProgramCache]: Analyzing trace with hash 510913087, now seen corresponding path program 1 times [2020-12-22 07:42:38,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:42:38,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916490945] [2020-12-22 07:42:38,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:42:38,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:42:38,376 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-12-22 07:42:38,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916490945] [2020-12-22 07:42:38,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:42:38,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 07:42:38,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527268308] [2020-12-22 07:42:38,377 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 07:42:38,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:42:38,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 07:42:38,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:42:38,378 INFO L87 Difference]: Start difference. First operand 163226 states and 261646 transitions. Second operand 6 states. [2020-12-22 07:42:45,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:42:45,234 INFO L93 Difference]: Finished difference Result 257198 states and 414747 transitions. [2020-12-22 07:42:45,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:42:45,235 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 168 [2020-12-22 07:42:45,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:42:45,836 INFO L225 Difference]: With dead ends: 257198 [2020-12-22 07:42:45,836 INFO L226 Difference]: Without dead ends: 218596 [2020-12-22 07:42:45,924 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:42:46,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218596 states. [2020-12-22 07:42:54,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218596 to 178404. [2020-12-22 07:42:54,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178404 states. [2020-12-22 07:42:55,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178404 states to 178404 states and 286238 transitions. [2020-12-22 07:42:55,090 INFO L78 Accepts]: Start accepts. Automaton has 178404 states and 286238 transitions. Word has length 168 [2020-12-22 07:42:55,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:42:55,090 INFO L481 AbstractCegarLoop]: Abstraction has 178404 states and 286238 transitions. [2020-12-22 07:42:55,090 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 07:42:55,090 INFO L276 IsEmpty]: Start isEmpty. Operand 178404 states and 286238 transitions. [2020-12-22 07:42:55,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-12-22 07:42:55,096 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:42:55,096 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:42:55,096 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 07:42:55,097 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:42:55,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:42:55,097 INFO L82 PathProgramCache]: Analyzing trace with hash -747505729, now seen corresponding path program 1 times [2020-12-22 07:42:55,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:42:55,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926716467] [2020-12-22 07:42:55,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:42:55,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:42:55,291 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 07:42:55,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926716467] [2020-12-22 07:42:55,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:42:55,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 07:42:55,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778851738] [2020-12-22 07:42:55,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 07:42:55,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:42:55,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 07:42:55,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:42:55,294 INFO L87 Difference]: Start difference. First operand 178404 states and 286238 transitions. Second operand 6 states. [2020-12-22 07:43:02,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:43:02,766 INFO L93 Difference]: Finished difference Result 261928 states and 422439 transitions. [2020-12-22 07:43:02,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:43:02,769 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 168 [2020-12-22 07:43:02,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:43:03,244 INFO L225 Difference]: With dead ends: 261928 [2020-12-22 07:43:03,245 INFO L226 Difference]: Without dead ends: 223326 [2020-12-22 07:43:03,314 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:43:03,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223326 states. [2020-12-22 07:43:10,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223326 to 193582. [2020-12-22 07:43:10,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193582 states. [2020-12-22 07:43:11,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193582 states to 193582 states and 310830 transitions. [2020-12-22 07:43:11,406 INFO L78 Accepts]: Start accepts. Automaton has 193582 states and 310830 transitions. Word has length 168 [2020-12-22 07:43:11,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:43:11,407 INFO L481 AbstractCegarLoop]: Abstraction has 193582 states and 310830 transitions. [2020-12-22 07:43:11,407 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 07:43:11,407 INFO L276 IsEmpty]: Start isEmpty. Operand 193582 states and 310830 transitions. [2020-12-22 07:43:11,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-12-22 07:43:11,412 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:43:11,413 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:43:11,413 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 07:43:11,413 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:43:11,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:43:11,414 INFO L82 PathProgramCache]: Analyzing trace with hash 497820414, now seen corresponding path program 1 times [2020-12-22 07:43:11,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:43:11,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407804022] [2020-12-22 07:43:11,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:43:11,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:43:11,518 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 07:43:11,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407804022] [2020-12-22 07:43:11,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:43:11,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:43:11,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079012948] [2020-12-22 07:43:11,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:43:11,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:43:11,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:43:11,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:43:11,520 INFO L87 Difference]: Start difference. First operand 193582 states and 310830 transitions. Second operand 3 states. [2020-12-22 07:43:21,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:43:21,671 INFO L93 Difference]: Finished difference Result 389482 states and 627911 transitions. [2020-12-22 07:43:21,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:43:21,671 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 169 [2020-12-22 07:43:21,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:43:22,338 INFO L225 Difference]: With dead ends: 389482 [2020-12-22 07:43:22,338 INFO L226 Difference]: Without dead ends: 312272 [2020-12-22 07:43:22,459 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 07:43:22,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312272 states. [2020-12-22 07:43:34,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312272 to 311941. [2020-12-22 07:43:34,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 311941 states. [2020-12-22 07:43:35,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311941 states to 311941 states and 501509 transitions. [2020-12-22 07:43:35,354 INFO L78 Accepts]: Start accepts. Automaton has 311941 states and 501509 transitions. Word has length 169 [2020-12-22 07:43:35,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:43:35,354 INFO L481 AbstractCegarLoop]: Abstraction has 311941 states and 501509 transitions. [2020-12-22 07:43:35,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:43:35,354 INFO L276 IsEmpty]: Start isEmpty. Operand 311941 states and 501509 transitions. [2020-12-22 07:43:35,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-12-22 07:43:35,362 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:43:35,362 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:43:35,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 07:43:35,363 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:43:35,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:43:35,363 INFO L82 PathProgramCache]: Analyzing trace with hash 475188160, now seen corresponding path program 1 times [2020-12-22 07:43:35,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:43:35,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943343612] [2020-12-22 07:43:35,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:43:35,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:43:35,507 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 07:43:35,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943343612] [2020-12-22 07:43:35,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:43:35,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:43:35,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078928165] [2020-12-22 07:43:35,509 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:43:35,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:43:35,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:43:35,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:43:35,511 INFO L87 Difference]: Start difference. First operand 311941 states and 501509 transitions. Second operand 4 states. [2020-12-22 07:43:48,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:43:48,230 INFO L93 Difference]: Finished difference Result 481440 states and 775941 transitions. [2020-12-22 07:43:48,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:43:48,230 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 169 [2020-12-22 07:43:48,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:43:49,080 INFO L225 Difference]: With dead ends: 481440 [2020-12-22 07:43:49,080 INFO L226 Difference]: Without dead ends: 373354 [2020-12-22 07:43:49,230 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 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 07:43:49,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373354 states. [2020-12-22 07:44:06,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373354 to 345917. [2020-12-22 07:44:06,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 345917 states. [2020-12-22 07:44:07,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345917 states to 345917 states and 555413 transitions. [2020-12-22 07:44:07,613 INFO L78 Accepts]: Start accepts. Automaton has 345917 states and 555413 transitions. Word has length 169 [2020-12-22 07:44:07,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:44:07,613 INFO L481 AbstractCegarLoop]: Abstraction has 345917 states and 555413 transitions. [2020-12-22 07:44:07,613 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:44:07,614 INFO L276 IsEmpty]: Start isEmpty. Operand 345917 states and 555413 transitions. [2020-12-22 07:44:07,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-12-22 07:44:07,624 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:44:07,625 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:44:07,625 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-22 07:44:07,625 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:44:07,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:44:07,626 INFO L82 PathProgramCache]: Analyzing trace with hash -472927854, now seen corresponding path program 1 times [2020-12-22 07:44:07,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:44:07,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278901531] [2020-12-22 07:44:07,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:44:07,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:44:07,871 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:44:07,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278901531] [2020-12-22 07:44:07,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:44:07,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:44:07,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120668101] [2020-12-22 07:44:07,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:44:07,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:44:07,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:44:07,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:44:07,874 INFO L87 Difference]: Start difference. First operand 345917 states and 555413 transitions. Second operand 3 states. [2020-12-22 07:44:32,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:44:32,490 INFO L93 Difference]: Finished difference Result 1027774 states and 1648922 transitions. [2020-12-22 07:44:32,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:44:32,491 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 170 [2020-12-22 07:44:32,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:44:34,164 INFO L225 Difference]: With dead ends: 1027774 [2020-12-22 07:44:34,165 INFO L226 Difference]: Without dead ends: 681918 [2020-12-22 07:44:34,591 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 07:44:35,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681918 states.