/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/product-lines/elevator_spec9_product26.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 06:13:48,555 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 06:13:48,560 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 06:13:48,616 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 06:13:48,617 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 06:13:48,621 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 06:13:48,625 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 06:13:48,633 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 06:13:48,636 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 06:13:48,642 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 06:13:48,644 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 06:13:48,645 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 06:13:48,646 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 06:13:48,648 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 06:13:48,651 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 06:13:48,653 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 06:13:48,654 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 06:13:48,657 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 06:13:48,666 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 06:13:48,675 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 06:13:48,677 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 06:13:48,679 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 06:13:48,681 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 06:13:48,683 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 06:13:48,691 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 06:13:48,696 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 06:13:48,697 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 06:13:48,699 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 06:13:48,700 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 06:13:48,701 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 06:13:48,702 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 06:13:48,703 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 06:13:48,703 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 06:13:48,703 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 06:13:48,704 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 06:13:48,705 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 06:13:48,706 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 06:13:48,757 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 06:13:48,758 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 06:13:48,762 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 06:13:48,763 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 06:13:48,763 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 06:13:48,763 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 06:13:48,764 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 06:13:48,764 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 06:13:48,764 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 06:13:48,765 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 06:13:48,766 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 06:13:48,766 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 06:13:48,766 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 06:13:48,766 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 06:13:48,767 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 06:13:48,767 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 06:13:48,767 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 06:13:48,767 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 06:13:48,767 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 06:13:48,768 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 06:13:48,768 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 06:13:48,768 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 06:13:48,769 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 06:13:48,769 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 06:13:48,769 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 06:13:48,769 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 06:13:49,224 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 06:13:49,255 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 06:13:49,259 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 06:13:49,261 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 06:13:49,262 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 06:13:49,263 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/product-lines/elevator_spec9_product26.cil.c [2020-12-22 06:13:49,372 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/41deb5513/938c60deb69046f5bb06a7c32b384a68/FLAG0477ff9e4 [2020-12-22 06:13:50,093 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 06:13:50,094 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec9_product26.cil.c [2020-12-22 06:13:50,134 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/41deb5513/938c60deb69046f5bb06a7c32b384a68/FLAG0477ff9e4 [2020-12-22 06:13:50,319 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/41deb5513/938c60deb69046f5bb06a7c32b384a68 [2020-12-22 06:13:50,324 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 06:13:50,327 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 06:13:50,331 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 06:13:50,332 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 06:13:50,336 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 06:13:50,337 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 06:13:50" (1/1) ... [2020-12-22 06:13:50,338 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@386636be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:13:50, skipping insertion in model container [2020-12-22 06:13:50,339 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 06:13:50" (1/1) ... [2020-12-22 06:13:50,348 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 06:13:50,425 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 06:13:50,977 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/product-lines/elevator_spec9_product26.cil.c[46205,46218] [2020-12-22 06:13:51,051 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 06:13:51,064 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 06:13:51,205 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/product-lines/elevator_spec9_product26.cil.c[46205,46218] [2020-12-22 06:13:51,250 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 06:13:51,320 INFO L208 MainTranslator]: Completed translation [2020-12-22 06:13:51,320 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:13:51 WrapperNode [2020-12-22 06:13:51,320 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 06:13:51,322 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 06:13:51,322 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 06:13:51,322 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 06:13:51,330 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:13:51" (1/1) ... [2020-12-22 06:13:51,364 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:13:51" (1/1) ... [2020-12-22 06:13:51,639 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 06:13:51,640 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 06:13:51,640 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 06:13:51,640 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 06:13:51,650 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:13:51" (1/1) ... [2020-12-22 06:13:51,650 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:13:51" (1/1) ... [2020-12-22 06:13:51,687 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:13:51" (1/1) ... [2020-12-22 06:13:51,687 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:13:51" (1/1) ... [2020-12-22 06:13:51,881 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:13:51" (1/1) ... [2020-12-22 06:13:52,024 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:13:51" (1/1) ... [2020-12-22 06:13:52,064 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:13:51" (1/1) ... [2020-12-22 06:13:52,114 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 06:13:52,116 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 06:13:52,116 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 06:13:52,116 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 06:13:52,117 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:13:51" (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 06:13:52,331 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 06:13:52,332 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 06:13:52,332 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 06:13:52,332 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 06:14:02,671 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 06:14:02,672 INFO L299 CfgBuilder]: Removed 1113 assume(true) statements. [2020-12-22 06:14:02,679 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 06:14:02 BoogieIcfgContainer [2020-12-22 06:14:02,679 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 06:14:02,681 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 06:14:02,681 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 06:14:02,685 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 06:14:02,685 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 06:13:50" (1/3) ... [2020-12-22 06:14:02,686 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55c20362 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 06:14:02, skipping insertion in model container [2020-12-22 06:14:02,686 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:13:51" (2/3) ... [2020-12-22 06:14:02,687 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55c20362 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 06:14:02, skipping insertion in model container [2020-12-22 06:14:02,687 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 06:14:02" (3/3) ... [2020-12-22 06:14:02,688 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec9_product26.cil.c [2020-12-22 06:14:02,695 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 06:14:02,702 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2020-12-22 06:14:02,722 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-12-22 06:14:02,766 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 06:14:02,766 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 06:14:02,766 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 06:14:02,766 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 06:14:02,766 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 06:14:02,766 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 06:14:02,767 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 06:14:02,767 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 06:14:02,851 INFO L276 IsEmpty]: Start isEmpty. Operand 4860 states. [2020-12-22 06:14:02,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 06:14:02,862 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:14:02,863 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] [2020-12-22 06:14:02,863 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:14:02,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:14:02,870 INFO L82 PathProgramCache]: Analyzing trace with hash -4419781, now seen corresponding path program 1 times [2020-12-22 06:14:02,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:14:02,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370533518] [2020-12-22 06:14:02,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:14:03,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:14:03,372 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 06:14:03,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370533518] [2020-12-22 06:14:03,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:14:03,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:14:03,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237302488] [2020-12-22 06:14:03,381 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:14:03,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:14:03,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:14:03,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:14:03,405 INFO L87 Difference]: Start difference. First operand 4860 states. Second operand 3 states. [2020-12-22 06:14:03,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:14:03,747 INFO L93 Difference]: Finished difference Result 9711 states and 18381 transitions. [2020-12-22 06:14:03,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:14:03,749 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-12-22 06:14:03,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:14:03,816 INFO L225 Difference]: With dead ends: 9711 [2020-12-22 06:14:03,816 INFO L226 Difference]: Without dead ends: 4856 [2020-12-22 06:14:03,833 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 06:14:03,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4856 states. [2020-12-22 06:14:04,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4856 to 4856. [2020-12-22 06:14:04,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4856 states. [2020-12-22 06:14:04,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4856 states to 4856 states and 9181 transitions. [2020-12-22 06:14:04,117 INFO L78 Accepts]: Start accepts. Automaton has 4856 states and 9181 transitions. Word has length 26 [2020-12-22 06:14:04,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:14:04,118 INFO L481 AbstractCegarLoop]: Abstraction has 4856 states and 9181 transitions. [2020-12-22 06:14:04,118 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:14:04,118 INFO L276 IsEmpty]: Start isEmpty. Operand 4856 states and 9181 transitions. [2020-12-22 06:14:04,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-22 06:14:04,128 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:14:04,128 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] [2020-12-22 06:14:04,129 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 06:14:04,130 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:14:04,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:14:04,130 INFO L82 PathProgramCache]: Analyzing trace with hash 1766352340, now seen corresponding path program 1 times [2020-12-22 06:14:04,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:14:04,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843712166] [2020-12-22 06:14:04,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:14:04,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:14:04,302 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 06:14:04,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843712166] [2020-12-22 06:14:04,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:14:04,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 06:14:04,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2382500] [2020-12-22 06:14:04,306 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 06:14:04,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:14:04,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 06:14:04,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 06:14:04,307 INFO L87 Difference]: Start difference. First operand 4856 states and 9181 transitions. Second operand 6 states. [2020-12-22 06:14:04,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:14:04,695 INFO L93 Difference]: Finished difference Result 9663 states and 18278 transitions. [2020-12-22 06:14:04,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 06:14:04,696 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-12-22 06:14:04,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:14:04,726 INFO L225 Difference]: With dead ends: 9663 [2020-12-22 06:14:04,727 INFO L226 Difference]: Without dead ends: 4850 [2020-12-22 06:14:04,740 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-22 06:14:04,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4850 states. [2020-12-22 06:14:04,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4850 to 4850. [2020-12-22 06:14:04,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4850 states. [2020-12-22 06:14:04,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4850 states to 4850 states and 9168 transitions. [2020-12-22 06:14:04,922 INFO L78 Accepts]: Start accepts. Automaton has 4850 states and 9168 transitions. Word has length 33 [2020-12-22 06:14:04,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:14:04,923 INFO L481 AbstractCegarLoop]: Abstraction has 4850 states and 9168 transitions. [2020-12-22 06:14:04,923 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 06:14:04,923 INFO L276 IsEmpty]: Start isEmpty. Operand 4850 states and 9168 transitions. [2020-12-22 06:14:04,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 06:14:04,924 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:14:04,925 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:14:04,925 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 06:14:04,928 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:14:04,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:14:04,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1940850698, now seen corresponding path program 1 times [2020-12-22 06:14:04,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:14:04,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659888072] [2020-12-22 06:14:04,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:14:05,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:14:05,087 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 06:14:05,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659888072] [2020-12-22 06:14:05,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:14:05,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:14:05,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779598806] [2020-12-22 06:14:05,090 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:14:05,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:14:05,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:14:05,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:14:05,091 INFO L87 Difference]: Start difference. First operand 4850 states and 9168 transitions. Second operand 4 states. [2020-12-22 06:14:05,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:14:05,631 INFO L93 Difference]: Finished difference Result 9657 states and 18265 transitions. [2020-12-22 06:14:05,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:14:05,633 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 34 [2020-12-22 06:14:05,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:14:05,663 INFO L225 Difference]: With dead ends: 9657 [2020-12-22 06:14:05,663 INFO L226 Difference]: Without dead ends: 4850 [2020-12-22 06:14:05,672 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:14:05,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4850 states. [2020-12-22 06:14:05,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4850 to 4850. [2020-12-22 06:14:05,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4850 states. [2020-12-22 06:14:05,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4850 states to 4850 states and 9164 transitions. [2020-12-22 06:14:05,886 INFO L78 Accepts]: Start accepts. Automaton has 4850 states and 9164 transitions. Word has length 34 [2020-12-22 06:14:05,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:14:05,895 INFO L481 AbstractCegarLoop]: Abstraction has 4850 states and 9164 transitions. [2020-12-22 06:14:05,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:14:05,896 INFO L276 IsEmpty]: Start isEmpty. Operand 4850 states and 9164 transitions. [2020-12-22 06:14:05,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-22 06:14:05,901 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:14:05,902 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] [2020-12-22 06:14:05,902 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 06:14:05,902 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:14:05,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:14:05,903 INFO L82 PathProgramCache]: Analyzing trace with hash -575300591, now seen corresponding path program 1 times [2020-12-22 06:14:05,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:14:05,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650678651] [2020-12-22 06:14:05,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:14:05,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:14:06,009 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 06:14:06,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650678651] [2020-12-22 06:14:06,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:14:06,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:14:06,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912973454] [2020-12-22 06:14:06,013 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:14:06,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:14:06,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:14:06,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:14:06,015 INFO L87 Difference]: Start difference. First operand 4850 states and 9164 transitions. Second operand 4 states. [2020-12-22 06:14:06,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:14:06,361 INFO L93 Difference]: Finished difference Result 9657 states and 18261 transitions. [2020-12-22 06:14:06,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:14:06,362 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 35 [2020-12-22 06:14:06,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:14:06,393 INFO L225 Difference]: With dead ends: 9657 [2020-12-22 06:14:06,393 INFO L226 Difference]: Without dead ends: 4850 [2020-12-22 06:14:06,403 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:14:06,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4850 states. [2020-12-22 06:14:06,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4850 to 4850. [2020-12-22 06:14:06,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4850 states. [2020-12-22 06:14:06,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4850 states to 4850 states and 9160 transitions. [2020-12-22 06:14:06,615 INFO L78 Accepts]: Start accepts. Automaton has 4850 states and 9160 transitions. Word has length 35 [2020-12-22 06:14:06,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:14:06,616 INFO L481 AbstractCegarLoop]: Abstraction has 4850 states and 9160 transitions. [2020-12-22 06:14:06,616 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:14:06,616 INFO L276 IsEmpty]: Start isEmpty. Operand 4850 states and 9160 transitions. [2020-12-22 06:14:06,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-22 06:14:06,617 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:14:06,618 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] [2020-12-22 06:14:06,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 06:14:06,621 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:14:06,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:14:06,622 INFO L82 PathProgramCache]: Analyzing trace with hash -1883314703, now seen corresponding path program 1 times [2020-12-22 06:14:06,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:14:06,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645236707] [2020-12-22 06:14:06,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:14:06,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:14:06,718 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 06:14:06,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645236707] [2020-12-22 06:14:06,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:14:06,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:14:06,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544397715] [2020-12-22 06:14:06,720 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:14:06,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:14:06,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:14:06,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:14:06,722 INFO L87 Difference]: Start difference. First operand 4850 states and 9160 transitions. Second operand 4 states. [2020-12-22 06:14:07,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:14:07,039 INFO L93 Difference]: Finished difference Result 9657 states and 18257 transitions. [2020-12-22 06:14:07,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:14:07,042 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 36 [2020-12-22 06:14:07,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:14:07,086 INFO L225 Difference]: With dead ends: 9657 [2020-12-22 06:14:07,086 INFO L226 Difference]: Without dead ends: 4850 [2020-12-22 06:14:07,096 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:14:07,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4850 states. [2020-12-22 06:14:07,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4850 to 4850. [2020-12-22 06:14:07,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4850 states. [2020-12-22 06:14:07,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4850 states to 4850 states and 9156 transitions. [2020-12-22 06:14:07,280 INFO L78 Accepts]: Start accepts. Automaton has 4850 states and 9156 transitions. Word has length 36 [2020-12-22 06:14:07,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:14:07,280 INFO L481 AbstractCegarLoop]: Abstraction has 4850 states and 9156 transitions. [2020-12-22 06:14:07,280 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:14:07,280 INFO L276 IsEmpty]: Start isEmpty. Operand 4850 states and 9156 transitions. [2020-12-22 06:14:07,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-22 06:14:07,281 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:14:07,281 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] [2020-12-22 06:14:07,282 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 06:14:07,282 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:14:07,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:14:07,282 INFO L82 PathProgramCache]: Analyzing trace with hash -1290307215, now seen corresponding path program 1 times [2020-12-22 06:14:07,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:14:07,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600027124] [2020-12-22 06:14:07,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:14:07,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:14:07,381 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 06:14:07,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600027124] [2020-12-22 06:14:07,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:14:07,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:14:07,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755811019] [2020-12-22 06:14:07,383 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:14:07,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:14:07,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:14:07,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:14:07,384 INFO L87 Difference]: Start difference. First operand 4850 states and 9156 transitions. Second operand 4 states. [2020-12-22 06:14:07,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:14:07,602 INFO L93 Difference]: Finished difference Result 9657 states and 18253 transitions. [2020-12-22 06:14:07,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:14:07,603 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 36 [2020-12-22 06:14:07,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:14:07,618 INFO L225 Difference]: With dead ends: 9657 [2020-12-22 06:14:07,618 INFO L226 Difference]: Without dead ends: 4829 [2020-12-22 06:14:07,627 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:14:07,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4829 states. [2020-12-22 06:14:07,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4829 to 4829. [2020-12-22 06:14:07,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4829 states. [2020-12-22 06:14:07,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4829 states to 4829 states and 9122 transitions. [2020-12-22 06:14:07,892 INFO L78 Accepts]: Start accepts. Automaton has 4829 states and 9122 transitions. Word has length 36 [2020-12-22 06:14:07,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:14:07,893 INFO L481 AbstractCegarLoop]: Abstraction has 4829 states and 9122 transitions. [2020-12-22 06:14:07,893 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:14:07,893 INFO L276 IsEmpty]: Start isEmpty. Operand 4829 states and 9122 transitions. [2020-12-22 06:14:07,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 06:14:07,894 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:14:07,894 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:14:07,894 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 06:14:07,895 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:14:07,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:14:07,900 INFO L82 PathProgramCache]: Analyzing trace with hash -172473684, now seen corresponding path program 1 times [2020-12-22 06:14:07,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:14:07,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132126200] [2020-12-22 06:14:07,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:14:07,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:14:07,998 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 06:14:07,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132126200] [2020-12-22 06:14:07,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:14:07,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:14:07,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392366065] [2020-12-22 06:14:08,000 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:14:08,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:14:08,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:14:08,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:14:08,001 INFO L87 Difference]: Start difference. First operand 4829 states and 9122 transitions. Second operand 4 states. [2020-12-22 06:14:08,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:14:08,233 INFO L93 Difference]: Finished difference Result 9636 states and 18219 transitions. [2020-12-22 06:14:08,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:14:08,234 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 37 [2020-12-22 06:14:08,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:14:08,247 INFO L225 Difference]: With dead ends: 9636 [2020-12-22 06:14:08,247 INFO L226 Difference]: Without dead ends: 4829 [2020-12-22 06:14:08,258 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:14:08,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4829 states. [2020-12-22 06:14:08,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4829 to 4829. [2020-12-22 06:14:08,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4829 states. [2020-12-22 06:14:08,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4829 states to 4829 states and 9121 transitions. [2020-12-22 06:14:08,445 INFO L78 Accepts]: Start accepts. Automaton has 4829 states and 9121 transitions. Word has length 37 [2020-12-22 06:14:08,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:14:08,445 INFO L481 AbstractCegarLoop]: Abstraction has 4829 states and 9121 transitions. [2020-12-22 06:14:08,446 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:14:08,446 INFO L276 IsEmpty]: Start isEmpty. Operand 4829 states and 9121 transitions. [2020-12-22 06:14:08,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-22 06:14:08,449 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:14:08,449 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:14:08,449 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 06:14:08,450 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:14:08,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:14:08,450 INFO L82 PathProgramCache]: Analyzing trace with hash 633595884, now seen corresponding path program 1 times [2020-12-22 06:14:08,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:14:08,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022396988] [2020-12-22 06:14:08,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:14:08,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:14:08,547 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 06:14:08,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022396988] [2020-12-22 06:14:08,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:14:08,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:14:08,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453410726] [2020-12-22 06:14:08,548 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:14:08,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:14:08,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:14:08,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:14:08,549 INFO L87 Difference]: Start difference. First operand 4829 states and 9121 transitions. Second operand 4 states. [2020-12-22 06:14:08,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:14:08,789 INFO L93 Difference]: Finished difference Result 9636 states and 18218 transitions. [2020-12-22 06:14:08,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:14:08,790 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 38 [2020-12-22 06:14:08,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:14:08,805 INFO L225 Difference]: With dead ends: 9636 [2020-12-22 06:14:08,805 INFO L226 Difference]: Without dead ends: 4829 [2020-12-22 06:14:08,814 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:14:08,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4829 states. [2020-12-22 06:14:08,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4829 to 4829. [2020-12-22 06:14:08,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4829 states. [2020-12-22 06:14:08,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4829 states to 4829 states and 9120 transitions. [2020-12-22 06:14:08,984 INFO L78 Accepts]: Start accepts. Automaton has 4829 states and 9120 transitions. Word has length 38 [2020-12-22 06:14:08,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:14:08,986 INFO L481 AbstractCegarLoop]: Abstraction has 4829 states and 9120 transitions. [2020-12-22 06:14:08,986 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:14:08,986 INFO L276 IsEmpty]: Start isEmpty. Operand 4829 states and 9120 transitions. [2020-12-22 06:14:08,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-22 06:14:08,987 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:14:08,987 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:14:08,987 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 06:14:08,987 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:14:08,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:14:08,988 INFO L82 PathProgramCache]: Analyzing trace with hash -838445753, now seen corresponding path program 1 times [2020-12-22 06:14:08,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:14:08,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870272570] [2020-12-22 06:14:08,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:14:09,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:14:09,069 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 06:14:09,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870272570] [2020-12-22 06:14:09,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:14:09,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 06:14:09,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759431873] [2020-12-22 06:14:09,071 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 06:14:09,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:14:09,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 06:14:09,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 06:14:09,072 INFO L87 Difference]: Start difference. First operand 4829 states and 9120 transitions. Second operand 7 states. [2020-12-22 06:14:09,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:14:09,414 INFO L93 Difference]: Finished difference Result 9630 states and 18206 transitions. [2020-12-22 06:14:09,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 06:14:09,415 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 39 [2020-12-22 06:14:09,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:14:09,427 INFO L225 Difference]: With dead ends: 9630 [2020-12-22 06:14:09,428 INFO L226 Difference]: Without dead ends: 4829 [2020-12-22 06:14:09,436 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2020-12-22 06:14:09,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4829 states. [2020-12-22 06:14:09,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4829 to 4829. [2020-12-22 06:14:09,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4829 states. [2020-12-22 06:14:09,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4829 states to 4829 states and 9119 transitions. [2020-12-22 06:14:09,677 INFO L78 Accepts]: Start accepts. Automaton has 4829 states and 9119 transitions. Word has length 39 [2020-12-22 06:14:09,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:14:09,682 INFO L481 AbstractCegarLoop]: Abstraction has 4829 states and 9119 transitions. [2020-12-22 06:14:09,682 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 06:14:09,683 INFO L276 IsEmpty]: Start isEmpty. Operand 4829 states and 9119 transitions. [2020-12-22 06:14:09,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-22 06:14:09,684 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:14:09,684 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:14:09,684 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 06:14:09,684 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:14:09,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:14:09,685 INFO L82 PathProgramCache]: Analyzing trace with hash -613413097, now seen corresponding path program 1 times [2020-12-22 06:14:09,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:14:09,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221557129] [2020-12-22 06:14:09,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:14:09,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:14:09,756 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 06:14:09,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221557129] [2020-12-22 06:14:09,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:14:09,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 06:14:09,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136943669] [2020-12-22 06:14:09,758 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:14:09,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:14:09,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:14:09,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:14:09,759 INFO L87 Difference]: Start difference. First operand 4829 states and 9119 transitions. Second operand 3 states. [2020-12-22 06:14:10,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:14:10,203 INFO L93 Difference]: Finished difference Result 11241 states and 21273 transitions. [2020-12-22 06:14:10,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:14:10,204 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 40 [2020-12-22 06:14:10,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:14:10,228 INFO L225 Difference]: With dead ends: 11241 [2020-12-22 06:14:10,228 INFO L226 Difference]: Without dead ends: 8786 [2020-12-22 06:14:10,235 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 06:14:10,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8786 states. [2020-12-22 06:14:10,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8786 to 6687. [2020-12-22 06:14:10,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6687 states. [2020-12-22 06:14:10,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6687 states to 6687 states and 12643 transitions. [2020-12-22 06:14:10,510 INFO L78 Accepts]: Start accepts. Automaton has 6687 states and 12643 transitions. Word has length 40 [2020-12-22 06:14:10,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:14:10,510 INFO L481 AbstractCegarLoop]: Abstraction has 6687 states and 12643 transitions. [2020-12-22 06:14:10,510 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:14:10,510 INFO L276 IsEmpty]: Start isEmpty. Operand 6687 states and 12643 transitions. [2020-12-22 06:14:10,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-22 06:14:10,514 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:14:10,514 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] [2020-12-22 06:14:10,514 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 06:14:10,515 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:14:10,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:14:10,515 INFO L82 PathProgramCache]: Analyzing trace with hash -1747046172, now seen corresponding path program 1 times [2020-12-22 06:14:10,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:14:10,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918262784] [2020-12-22 06:14:10,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:14:10,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:14:10,605 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 06:14:10,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918262784] [2020-12-22 06:14:10,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:14:10,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 06:14:10,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074780825] [2020-12-22 06:14:10,607 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 06:14:10,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:14:10,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 06:14:10,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 06:14:10,608 INFO L87 Difference]: Start difference. First operand 6687 states and 12643 transitions. Second operand 8 states. [2020-12-22 06:14:11,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:14:11,608 INFO L93 Difference]: Finished difference Result 14723 states and 27636 transitions. [2020-12-22 06:14:11,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 06:14:11,609 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 53 [2020-12-22 06:14:11,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:14:11,632 INFO L225 Difference]: With dead ends: 14723 [2020-12-22 06:14:11,632 INFO L226 Difference]: Without dead ends: 9258 [2020-12-22 06:14:11,641 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2020-12-22 06:14:11,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9258 states. [2020-12-22 06:14:11,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9258 to 5432. [2020-12-22 06:14:11,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5432 states. [2020-12-22 06:14:11,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5432 states to 5432 states and 10225 transitions. [2020-12-22 06:14:11,899 INFO L78 Accepts]: Start accepts. Automaton has 5432 states and 10225 transitions. Word has length 53 [2020-12-22 06:14:11,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:14:11,900 INFO L481 AbstractCegarLoop]: Abstraction has 5432 states and 10225 transitions. [2020-12-22 06:14:11,900 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 06:14:11,900 INFO L276 IsEmpty]: Start isEmpty. Operand 5432 states and 10225 transitions. [2020-12-22 06:14:11,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 06:14:11,902 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:14:11,902 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] [2020-12-22 06:14:11,903 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 06:14:11,903 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:14:11,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:14:11,903 INFO L82 PathProgramCache]: Analyzing trace with hash 237412071, now seen corresponding path program 1 times [2020-12-22 06:14:11,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:14:11,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780848738] [2020-12-22 06:14:11,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:14:11,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:14:11,972 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 06:14:11,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780848738] [2020-12-22 06:14:11,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:14:11,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:14:11,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611909382] [2020-12-22 06:14:11,974 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:14:11,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:14:11,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:14:11,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:14:11,976 INFO L87 Difference]: Start difference. First operand 5432 states and 10225 transitions. Second operand 5 states. [2020-12-22 06:14:14,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:14:14,859 INFO L93 Difference]: Finished difference Result 21909 states and 41135 transitions. [2020-12-22 06:14:14,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 06:14:14,860 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 54 [2020-12-22 06:14:14,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:14:14,909 INFO L225 Difference]: With dead ends: 21909 [2020-12-22 06:14:14,909 INFO L226 Difference]: Without dead ends: 16523 [2020-12-22 06:14:14,921 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 06:14:14,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16523 states. [2020-12-22 06:14:15,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16523 to 5446. [2020-12-22 06:14:15,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5446 states. [2020-12-22 06:14:15,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5446 states to 5446 states and 10239 transitions. [2020-12-22 06:14:15,353 INFO L78 Accepts]: Start accepts. Automaton has 5446 states and 10239 transitions. Word has length 54 [2020-12-22 06:14:15,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:14:15,353 INFO L481 AbstractCegarLoop]: Abstraction has 5446 states and 10239 transitions. [2020-12-22 06:14:15,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:14:15,354 INFO L276 IsEmpty]: Start isEmpty. Operand 5446 states and 10239 transitions. [2020-12-22 06:14:15,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 06:14:15,356 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:14:15,356 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] [2020-12-22 06:14:15,357 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 06:14:15,357 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:14:15,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:14:15,358 INFO L82 PathProgramCache]: Analyzing trace with hash -665481789, now seen corresponding path program 1 times [2020-12-22 06:14:15,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:14:15,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799079806] [2020-12-22 06:14:15,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:14:15,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:14:15,431 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 06:14:15,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799079806] [2020-12-22 06:14:15,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:14:15,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:14:15,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653850898] [2020-12-22 06:14:15,432 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:14:15,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:14:15,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:14:15,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:14:15,434 INFO L87 Difference]: Start difference. First operand 5446 states and 10239 transitions. Second operand 4 states. [2020-12-22 06:14:18,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:14:18,209 INFO L93 Difference]: Finished difference Result 16177 states and 30296 transitions. [2020-12-22 06:14:18,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 06:14:18,210 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 55 [2020-12-22 06:14:18,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:14:18,240 INFO L225 Difference]: With dead ends: 16177 [2020-12-22 06:14:18,240 INFO L226 Difference]: Without dead ends: 10764 [2020-12-22 06:14:18,252 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:14:18,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10764 states. [2020-12-22 06:14:18,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10764 to 6952. [2020-12-22 06:14:18,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6952 states. [2020-12-22 06:14:18,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6952 states to 6952 states and 12929 transitions. [2020-12-22 06:14:18,709 INFO L78 Accepts]: Start accepts. Automaton has 6952 states and 12929 transitions. Word has length 55 [2020-12-22 06:14:18,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:14:18,710 INFO L481 AbstractCegarLoop]: Abstraction has 6952 states and 12929 transitions. [2020-12-22 06:14:18,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:14:18,710 INFO L276 IsEmpty]: Start isEmpty. Operand 6952 states and 12929 transitions. [2020-12-22 06:14:18,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-22 06:14:18,712 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:14:18,712 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] [2020-12-22 06:14:18,713 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 06:14:18,713 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:14:18,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:14:18,713 INFO L82 PathProgramCache]: Analyzing trace with hash 454916123, now seen corresponding path program 1 times [2020-12-22 06:14:18,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:14:18,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344929660] [2020-12-22 06:14:18,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:14:18,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:14:18,787 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 06:14:18,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344929660] [2020-12-22 06:14:18,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:14:18,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:14:18,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471372468] [2020-12-22 06:14:18,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:14:18,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:14:18,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:14:18,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:14:18,791 INFO L87 Difference]: Start difference. First operand 6952 states and 12929 transitions. Second operand 5 states. [2020-12-22 06:14:20,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:14:20,588 INFO L93 Difference]: Finished difference Result 46439 states and 86653 transitions. [2020-12-22 06:14:20,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 06:14:20,593 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 57 [2020-12-22 06:14:20,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:14:20,664 INFO L225 Difference]: With dead ends: 46439 [2020-12-22 06:14:20,664 INFO L226 Difference]: Without dead ends: 39529 [2020-12-22 06:14:20,679 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-22 06:14:20,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39529 states. [2020-12-22 06:14:21,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39529 to 11129. [2020-12-22 06:14:21,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11129 states. [2020-12-22 06:14:21,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11129 states to 11129 states and 20725 transitions. [2020-12-22 06:14:21,493 INFO L78 Accepts]: Start accepts. Automaton has 11129 states and 20725 transitions. Word has length 57 [2020-12-22 06:14:21,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:14:21,493 INFO L481 AbstractCegarLoop]: Abstraction has 11129 states and 20725 transitions. [2020-12-22 06:14:21,494 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:14:21,494 INFO L276 IsEmpty]: Start isEmpty. Operand 11129 states and 20725 transitions. [2020-12-22 06:14:21,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-22 06:14:21,496 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:14:21,496 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] [2020-12-22 06:14:21,496 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 06:14:21,496 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:14:21,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:14:21,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1350522211, now seen corresponding path program 1 times [2020-12-22 06:14:21,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:14:21,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597428728] [2020-12-22 06:14:21,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:14:21,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:14:21,564 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 06:14:21,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597428728] [2020-12-22 06:14:21,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:14:21,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:14:21,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557872064] [2020-12-22 06:14:21,565 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:14:21,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:14:21,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:14:21,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:14:21,566 INFO L87 Difference]: Start difference. First operand 11129 states and 20725 transitions. Second operand 4 states. [2020-12-22 06:14:22,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:14:22,735 INFO L93 Difference]: Finished difference Result 33636 states and 62660 transitions. [2020-12-22 06:14:22,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 06:14:22,736 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 57 [2020-12-22 06:14:22,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:14:22,783 INFO L225 Difference]: With dead ends: 33636 [2020-12-22 06:14:22,784 INFO L226 Difference]: Without dead ends: 26894 [2020-12-22 06:14:22,796 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:14:22,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26894 states. [2020-12-22 06:14:23,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26894 to 17136. [2020-12-22 06:14:23,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17136 states. [2020-12-22 06:14:23,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17136 states to 17136 states and 31908 transitions. [2020-12-22 06:14:23,580 INFO L78 Accepts]: Start accepts. Automaton has 17136 states and 31908 transitions. Word has length 57 [2020-12-22 06:14:23,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:14:23,580 INFO L481 AbstractCegarLoop]: Abstraction has 17136 states and 31908 transitions. [2020-12-22 06:14:23,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:14:23,581 INFO L276 IsEmpty]: Start isEmpty. Operand 17136 states and 31908 transitions. [2020-12-22 06:14:23,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-22 06:14:23,582 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:14:23,583 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] [2020-12-22 06:14:23,583 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 06:14:23,583 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:14:23,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:14:23,584 INFO L82 PathProgramCache]: Analyzing trace with hash 939482835, now seen corresponding path program 1 times [2020-12-22 06:14:23,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:14:23,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127108938] [2020-12-22 06:14:23,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:14:23,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:14:23,652 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 06:14:23,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127108938] [2020-12-22 06:14:23,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:14:23,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:14:23,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791929105] [2020-12-22 06:14:23,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:14:23,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:14:23,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:14:23,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:14:23,654 INFO L87 Difference]: Start difference. First operand 17136 states and 31908 transitions. Second operand 4 states. [2020-12-22 06:14:24,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:14:24,865 INFO L93 Difference]: Finished difference Result 39742 states and 73956 transitions. [2020-12-22 06:14:24,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 06:14:24,866 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 59 [2020-12-22 06:14:24,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:14:24,898 INFO L225 Difference]: With dead ends: 39742 [2020-12-22 06:14:24,899 INFO L226 Difference]: Without dead ends: 27240 [2020-12-22 06:14:24,911 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:14:24,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27240 states. [2020-12-22 06:14:25,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27240 to 17156. [2020-12-22 06:14:25,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17156 states. [2020-12-22 06:14:25,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17156 states to 17156 states and 31916 transitions. [2020-12-22 06:14:25,635 INFO L78 Accepts]: Start accepts. Automaton has 17156 states and 31916 transitions. Word has length 59 [2020-12-22 06:14:25,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:14:25,636 INFO L481 AbstractCegarLoop]: Abstraction has 17156 states and 31916 transitions. [2020-12-22 06:14:25,636 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:14:25,636 INFO L276 IsEmpty]: Start isEmpty. Operand 17156 states and 31916 transitions. [2020-12-22 06:14:25,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 06:14:25,639 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:14:25,639 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:14:25,639 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 06:14:25,639 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:14:25,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:14:25,640 INFO L82 PathProgramCache]: Analyzing trace with hash 1133074442, now seen corresponding path program 1 times [2020-12-22 06:14:25,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:14:25,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681024238] [2020-12-22 06:14:25,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:14:25,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:14:25,725 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 06:14:25,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681024238] [2020-12-22 06:14:25,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:14:25,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 06:14:25,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229844328] [2020-12-22 06:14:25,726 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 06:14:25,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:14:25,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 06:14:25,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 06:14:25,727 INFO L87 Difference]: Start difference. First operand 17156 states and 31916 transitions. Second operand 7 states. [2020-12-22 06:14:27,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:14:27,956 INFO L93 Difference]: Finished difference Result 52731 states and 98054 transitions. [2020-12-22 06:14:27,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 06:14:27,956 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 65 [2020-12-22 06:14:27,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:14:28,038 INFO L225 Difference]: With dead ends: 52731 [2020-12-22 06:14:28,039 INFO L226 Difference]: Without dead ends: 39987 [2020-12-22 06:14:28,068 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2020-12-22 06:14:28,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39987 states. [2020-12-22 06:14:29,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39987 to 17168. [2020-12-22 06:14:29,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17168 states. [2020-12-22 06:14:29,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17168 states to 17168 states and 31917 transitions. [2020-12-22 06:14:29,134 INFO L78 Accepts]: Start accepts. Automaton has 17168 states and 31917 transitions. Word has length 65 [2020-12-22 06:14:29,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:14:29,134 INFO L481 AbstractCegarLoop]: Abstraction has 17168 states and 31917 transitions. [2020-12-22 06:14:29,134 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 06:14:29,134 INFO L276 IsEmpty]: Start isEmpty. Operand 17168 states and 31917 transitions. [2020-12-22 06:14:29,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 06:14:29,136 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:14:29,137 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:14:29,137 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 06:14:29,137 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:14:29,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:14:29,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1555776268, now seen corresponding path program 1 times [2020-12-22 06:14:29,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:14:29,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270740053] [2020-12-22 06:14:29,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:14:29,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:14:29,204 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 06:14:29,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270740053] [2020-12-22 06:14:29,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:14:29,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:14:29,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920991879] [2020-12-22 06:14:29,206 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:14:29,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:14:29,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:14:29,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:14:29,207 INFO L87 Difference]: Start difference. First operand 17168 states and 31917 transitions. Second operand 5 states. [2020-12-22 06:14:30,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:14:30,051 INFO L93 Difference]: Finished difference Result 29693 states and 55178 transitions. [2020-12-22 06:14:30,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 06:14:30,052 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 65 [2020-12-22 06:14:30,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:14:30,073 INFO L225 Difference]: With dead ends: 29693 [2020-12-22 06:14:30,074 INFO L226 Difference]: Without dead ends: 17195 [2020-12-22 06:14:30,089 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 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 06:14:30,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17195 states. [2020-12-22 06:14:30,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17195 to 17168. [2020-12-22 06:14:30,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17168 states. [2020-12-22 06:14:31,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17168 states to 17168 states and 31878 transitions. [2020-12-22 06:14:31,181 INFO L78 Accepts]: Start accepts. Automaton has 17168 states and 31878 transitions. Word has length 65 [2020-12-22 06:14:31,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:14:31,181 INFO L481 AbstractCegarLoop]: Abstraction has 17168 states and 31878 transitions. [2020-12-22 06:14:31,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:14:31,181 INFO L276 IsEmpty]: Start isEmpty. Operand 17168 states and 31878 transitions. [2020-12-22 06:14:31,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 06:14:31,185 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:14:31,185 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:14:31,185 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 06:14:31,185 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:14:31,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:14:31,187 INFO L82 PathProgramCache]: Analyzing trace with hash 1813941706, now seen corresponding path program 1 times [2020-12-22 06:14:31,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:14:31,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420620017] [2020-12-22 06:14:31,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:14:31,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:14:31,288 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 06:14:31,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420620017] [2020-12-22 06:14:31,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:14:31,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:14:31,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230010335] [2020-12-22 06:14:31,289 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 06:14:31,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:14:31,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 06:14:31,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-12-22 06:14:31,290 INFO L87 Difference]: Start difference. First operand 17168 states and 31878 transitions. Second operand 6 states. [2020-12-22 06:14:33,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:14:33,805 INFO L93 Difference]: Finished difference Result 70393 states and 130984 transitions. [2020-12-22 06:14:33,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 06:14:33,806 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-12-22 06:14:33,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:14:33,889 INFO L225 Difference]: With dead ends: 70393 [2020-12-22 06:14:33,889 INFO L226 Difference]: Without dead ends: 53423 [2020-12-22 06:14:33,910 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-12-22 06:14:33,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53423 states. [2020-12-22 06:14:35,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53423 to 41740. [2020-12-22 06:14:35,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41740 states. [2020-12-22 06:14:35,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41740 states to 41740 states and 77500 transitions. [2020-12-22 06:14:35,729 INFO L78 Accepts]: Start accepts. Automaton has 41740 states and 77500 transitions. Word has length 65 [2020-12-22 06:14:35,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:14:35,729 INFO L481 AbstractCegarLoop]: Abstraction has 41740 states and 77500 transitions. [2020-12-22 06:14:35,729 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 06:14:35,729 INFO L276 IsEmpty]: Start isEmpty. Operand 41740 states and 77500 transitions. [2020-12-22 06:14:35,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 06:14:35,733 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:14:35,733 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:14:35,733 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 06:14:35,733 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:14:35,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:14:35,734 INFO L82 PathProgramCache]: Analyzing trace with hash -1133952433, now seen corresponding path program 1 times [2020-12-22 06:14:35,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:14:35,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816908273] [2020-12-22 06:14:35,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:14:35,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:14:35,836 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 06:14:35,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816908273] [2020-12-22 06:14:35,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:14:35,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:14:35,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430605204] [2020-12-22 06:14:35,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 06:14:35,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:14:35,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 06:14:35,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-12-22 06:14:35,838 INFO L87 Difference]: Start difference. First operand 41740 states and 77500 transitions. Second operand 6 states. [2020-12-22 06:14:42,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:14:42,443 INFO L93 Difference]: Finished difference Result 189744 states and 352488 transitions. [2020-12-22 06:14:42,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 06:14:42,443 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-12-22 06:14:42,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:14:42,828 INFO L225 Difference]: With dead ends: 189744 [2020-12-22 06:14:42,828 INFO L226 Difference]: Without dead ends: 148203 [2020-12-22 06:14:42,882 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-12-22 06:14:42,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148203 states. [2020-12-22 06:14:48,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148203 to 113684. [2020-12-22 06:14:48,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113684 states. [2020-12-22 06:14:48,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113684 states to 113684 states and 210826 transitions. [2020-12-22 06:14:48,324 INFO L78 Accepts]: Start accepts. Automaton has 113684 states and 210826 transitions. Word has length 66 [2020-12-22 06:14:48,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:14:48,324 INFO L481 AbstractCegarLoop]: Abstraction has 113684 states and 210826 transitions. [2020-12-22 06:14:48,324 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 06:14:48,324 INFO L276 IsEmpty]: Start isEmpty. Operand 113684 states and 210826 transitions. [2020-12-22 06:14:48,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 06:14:48,326 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:14:48,326 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:14:48,326 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 06:14:48,326 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:14:48,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:14:48,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1523272047, now seen corresponding path program 1 times [2020-12-22 06:14:48,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:14:48,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751962855] [2020-12-22 06:14:48,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:14:48,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:14:48,432 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 06:14:48,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751962855] [2020-12-22 06:14:48,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:14:48,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:14:48,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667405586] [2020-12-22 06:14:48,435 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 06:14:48,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:14:48,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 06:14:48,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-12-22 06:14:48,436 INFO L87 Difference]: Start difference. First operand 113684 states and 210826 transitions. Second operand 6 states. [2020-12-22 06:15:04,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:15:04,228 INFO L93 Difference]: Finished difference Result 541919 states and 1004958 transitions. [2020-12-22 06:15:04,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 06:15:04,229 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-12-22 06:15:04,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:15:05,509 INFO L225 Difference]: With dead ends: 541919 [2020-12-22 06:15:05,509 INFO L226 Difference]: Without dead ends: 428435 [2020-12-22 06:15:05,652 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-12-22 06:15:06,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428435 states. [2020-12-22 06:15:20,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428435 to 325868. [2020-12-22 06:15:20,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 325868 states. [2020-12-22 06:15:21,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325868 states to 325868 states and 603484 transitions. [2020-12-22 06:15:21,663 INFO L78 Accepts]: Start accepts. Automaton has 325868 states and 603484 transitions. Word has length 67 [2020-12-22 06:15:21,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:15:21,663 INFO L481 AbstractCegarLoop]: Abstraction has 325868 states and 603484 transitions. [2020-12-22 06:15:21,663 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 06:15:21,664 INFO L276 IsEmpty]: Start isEmpty. Operand 325868 states and 603484 transitions. [2020-12-22 06:15:21,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 06:15:21,679 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:15:21,679 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:15:21,679 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 06:15:21,679 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:15:21,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:15:21,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1845514580, now seen corresponding path program 1 times [2020-12-22 06:15:21,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:15:21,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316520402] [2020-12-22 06:15:21,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:15:21,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:15:21,794 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 06:15:21,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316520402] [2020-12-22 06:15:21,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:15:21,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:15:21,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417776871] [2020-12-22 06:15:21,796 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 06:15:21,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:15:21,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 06:15:21,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-12-22 06:15:21,798 INFO L87 Difference]: Start difference. First operand 325868 states and 603484 transitions. Second operand 6 states. [2020-12-22 06:16:07,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:16:07,642 INFO L93 Difference]: Finished difference Result 1586094 states and 2937030 transitions. [2020-12-22 06:16:07,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 06:16:07,643 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 68 [2020-12-22 06:16:07,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:16:12,748 INFO L225 Difference]: With dead ends: 1586094 [2020-12-22 06:16:12,749 INFO L226 Difference]: Without dead ends: 1260427 [2020-12-22 06:16:14,554 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-12-22 06:16:16,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1260427 states.