/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_product11.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 06:13:14,833 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 06:13:14,839 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 06:13:14,903 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 06:13:14,903 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 06:13:14,907 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 06:13:14,911 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 06:13:14,922 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 06:13:14,926 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 06:13:14,933 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 06:13:14,935 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 06:13:14,937 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 06:13:14,937 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 06:13:14,942 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 06:13:14,945 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 06:13:14,947 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 06:13:14,949 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 06:13:14,953 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 06:13:14,975 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 06:13:14,985 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 06:13:14,987 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 06:13:14,989 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 06:13:14,991 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 06:13:14,994 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 06:13:15,004 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 06:13:15,010 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 06:13:15,011 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 06:13:15,013 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 06:13:15,014 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 06:13:15,015 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 06:13:15,015 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 06:13:15,016 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 06:13:15,016 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 06:13:15,017 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 06:13:15,018 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 06:13:15,019 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 06:13:15,027 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 06:13:15,084 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 06:13:15,084 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 06:13:15,088 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 06:13:15,088 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 06:13:15,089 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 06:13:15,089 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 06:13:15,089 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 06:13:15,089 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 06:13:15,090 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 06:13:15,090 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 06:13:15,091 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 06:13:15,091 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 06:13:15,092 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 06:13:15,092 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 06:13:15,092 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 06:13:15,092 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 06:13:15,092 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 06:13:15,093 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 06:13:15,093 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 06:13:15,093 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 06:13:15,094 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 06:13:15,094 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 06:13:15,094 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 06:13:15,094 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 06:13:15,094 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 06:13:15,095 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 06:13:15,573 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 06:13:15,606 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 06:13:15,611 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 06:13:15,612 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 06:13:15,613 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 06:13:15,614 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/product-lines/elevator_spec9_product11.cil.c [2020-12-22 06:13:15,710 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bbc6a1bdc/70dddc8fefca45b9b692a30776eff1a9/FLAG5612e4e1e [2020-12-22 06:13:16,545 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 06:13:16,546 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec9_product11.cil.c [2020-12-22 06:13:16,582 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bbc6a1bdc/70dddc8fefca45b9b692a30776eff1a9/FLAG5612e4e1e [2020-12-22 06:13:16,720 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bbc6a1bdc/70dddc8fefca45b9b692a30776eff1a9 [2020-12-22 06:13:16,723 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 06:13:16,726 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 06:13:16,730 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 06:13:16,730 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 06:13:16,734 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 06:13:16,736 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 06:13:16" (1/1) ... [2020-12-22 06:13:16,738 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56b1d14b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:13:16, skipping insertion in model container [2020-12-22 06:13:16,739 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 06:13:16" (1/1) ... [2020-12-22 06:13:16,748 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 06:13:16,843 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 06:13:17,675 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_product11.cil.c[71630,71643] [2020-12-22 06:13:17,681 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 06:13:17,701 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 06:13:17,801 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_product11.cil.c[71630,71643] [2020-12-22 06:13:17,801 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 06:13:17,862 INFO L208 MainTranslator]: Completed translation [2020-12-22 06:13:17,863 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:13:17 WrapperNode [2020-12-22 06:13:17,863 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 06:13:17,864 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 06:13:17,865 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 06:13:17,865 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 06:13:17,873 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:13:17" (1/1) ... [2020-12-22 06:13:17,905 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:13:17" (1/1) ... [2020-12-22 06:13:18,145 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 06:13:18,149 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 06:13:18,149 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 06:13:18,150 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 06:13:18,161 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:13:17" (1/1) ... [2020-12-22 06:13:18,161 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:13:17" (1/1) ... [2020-12-22 06:13:18,203 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:13:17" (1/1) ... [2020-12-22 06:13:18,203 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:13:17" (1/1) ... [2020-12-22 06:13:18,325 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:13:17" (1/1) ... [2020-12-22 06:13:18,419 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:13:17" (1/1) ... [2020-12-22 06:13:18,446 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:13:17" (1/1) ... [2020-12-22 06:13:18,487 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 06:13:18,490 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 06:13:18,490 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 06:13:18,490 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 06:13:18,492 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:13:17" (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 06:13:18,609 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 06:13:18,610 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 06:13:18,610 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 06:13:18,610 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 06:13:24,908 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 06:13:24,908 INFO L299 CfgBuilder]: Removed 553 assume(true) statements. [2020-12-22 06:13:24,913 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 06:13:24 BoogieIcfgContainer [2020-12-22 06:13:24,914 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 06:13:24,916 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 06:13:24,916 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 06:13:24,920 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 06:13:24,920 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 06:13:16" (1/3) ... [2020-12-22 06:13:24,921 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68721fc2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 06:13:24, skipping insertion in model container [2020-12-22 06:13:24,921 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:13:17" (2/3) ... [2020-12-22 06:13:24,922 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68721fc2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 06:13:24, skipping insertion in model container [2020-12-22 06:13:24,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 06:13:24" (3/3) ... [2020-12-22 06:13:24,924 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec9_product11.cil.c [2020-12-22 06:13:24,931 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 06:13:24,938 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2020-12-22 06:13:24,959 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-12-22 06:13:25,016 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 06:13:25,017 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 06:13:25,017 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 06:13:25,017 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 06:13:25,017 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 06:13:25,017 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 06:13:25,017 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 06:13:25,017 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 06:13:25,090 INFO L276 IsEmpty]: Start isEmpty. Operand 2412 states. [2020-12-22 06:13:25,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 06:13:25,112 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:13:25,113 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:13:25,114 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 06:13:25,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:13:25,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1171138841, now seen corresponding path program 1 times [2020-12-22 06:13:25,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:13:25,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013419448] [2020-12-22 06:13:25,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:13:25,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:13:25,601 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 06:13:25,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013419448] [2020-12-22 06:13:25,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:13:25,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:13:25,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131107739] [2020-12-22 06:13:25,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:13:25,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:13:25,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:13:25,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:13:25,633 INFO L87 Difference]: Start difference. First operand 2412 states. Second operand 3 states. [2020-12-22 06:13:25,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:13:25,929 INFO L93 Difference]: Finished difference Result 4815 states and 9105 transitions. [2020-12-22 06:13:25,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:13:25,931 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 43 [2020-12-22 06:13:25,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:13:25,977 INFO L225 Difference]: With dead ends: 4815 [2020-12-22 06:13:25,978 INFO L226 Difference]: Without dead ends: 2408 [2020-12-22 06:13:25,996 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 06:13:26,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2408 states. [2020-12-22 06:13:26,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2408 to 2408. [2020-12-22 06:13:26,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2408 states. [2020-12-22 06:13:26,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2408 states to 2408 states and 4543 transitions. [2020-12-22 06:13:26,278 INFO L78 Accepts]: Start accepts. Automaton has 2408 states and 4543 transitions. Word has length 43 [2020-12-22 06:13:26,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:13:26,279 INFO L481 AbstractCegarLoop]: Abstraction has 2408 states and 4543 transitions. [2020-12-22 06:13:26,279 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:13:26,279 INFO L276 IsEmpty]: Start isEmpty. Operand 2408 states and 4543 transitions. [2020-12-22 06:13:26,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-22 06:13:26,286 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:13:26,286 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] [2020-12-22 06:13:26,287 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 06:13:26,288 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 06:13:26,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:13:26,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1166698833, now seen corresponding path program 1 times [2020-12-22 06:13:26,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:13:26,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077634653] [2020-12-22 06:13:26,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:13:26,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:13:26,528 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 06:13:26,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077634653] [2020-12-22 06:13:26,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:13:26,529 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 06:13:26,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677193299] [2020-12-22 06:13:26,531 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 06:13:26,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:13:26,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 06:13:26,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 06:13:26,532 INFO L87 Difference]: Start difference. First operand 2408 states and 4543 transitions. Second operand 6 states. [2020-12-22 06:13:26,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:13:26,795 INFO L93 Difference]: Finished difference Result 4767 states and 9002 transitions. [2020-12-22 06:13:26,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 06:13:26,796 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 50 [2020-12-22 06:13:26,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:13:26,813 INFO L225 Difference]: With dead ends: 4767 [2020-12-22 06:13:26,814 INFO L226 Difference]: Without dead ends: 2402 [2020-12-22 06:13:26,820 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 06:13:26,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2402 states. [2020-12-22 06:13:26,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2402 to 2402. [2020-12-22 06:13:26,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2402 states. [2020-12-22 06:13:26,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2402 states to 2402 states and 4530 transitions. [2020-12-22 06:13:26,927 INFO L78 Accepts]: Start accepts. Automaton has 2402 states and 4530 transitions. Word has length 50 [2020-12-22 06:13:26,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:13:26,927 INFO L481 AbstractCegarLoop]: Abstraction has 2402 states and 4530 transitions. [2020-12-22 06:13:26,927 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 06:13:26,928 INFO L276 IsEmpty]: Start isEmpty. Operand 2402 states and 4530 transitions. [2020-12-22 06:13:26,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-22 06:13:26,933 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:13:26,933 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] [2020-12-22 06:13:26,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 06:13:26,936 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 06:13:26,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:13:26,939 INFO L82 PathProgramCache]: Analyzing trace with hash -505929873, now seen corresponding path program 1 times [2020-12-22 06:13:26,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:13:26,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141311783] [2020-12-22 06:13:26,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:13:27,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:13:27,088 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 06:13:27,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141311783] [2020-12-22 06:13:27,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:13:27,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:13:27,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713221512] [2020-12-22 06:13:27,090 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:13:27,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:13:27,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:13:27,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:13:27,092 INFO L87 Difference]: Start difference. First operand 2402 states and 4530 transitions. Second operand 4 states. [2020-12-22 06:13:27,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:13:27,404 INFO L93 Difference]: Finished difference Result 4761 states and 8989 transitions. [2020-12-22 06:13:27,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:13:27,406 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 51 [2020-12-22 06:13:27,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:13:27,423 INFO L225 Difference]: With dead ends: 4761 [2020-12-22 06:13:27,423 INFO L226 Difference]: Without dead ends: 2402 [2020-12-22 06:13:27,428 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 06:13:27,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2402 states. [2020-12-22 06:13:27,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2402 to 2402. [2020-12-22 06:13:27,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2402 states. [2020-12-22 06:13:27,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2402 states to 2402 states and 4526 transitions. [2020-12-22 06:13:27,552 INFO L78 Accepts]: Start accepts. Automaton has 2402 states and 4526 transitions. Word has length 51 [2020-12-22 06:13:27,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:13:27,560 INFO L481 AbstractCegarLoop]: Abstraction has 2402 states and 4526 transitions. [2020-12-22 06:13:27,560 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:13:27,561 INFO L276 IsEmpty]: Start isEmpty. Operand 2402 states and 4526 transitions. [2020-12-22 06:13:27,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 06:13:27,566 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:13:27,566 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] [2020-12-22 06:13:27,566 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 06:13:27,567 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 06:13:27,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:13:27,567 INFO L82 PathProgramCache]: Analyzing trace with hash 892523700, now seen corresponding path program 1 times [2020-12-22 06:13:27,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:13:27,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961836623] [2020-12-22 06:13:27,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:13:27,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:13:27,700 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 06:13:27,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961836623] [2020-12-22 06:13:27,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:13:27,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:13:27,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650997195] [2020-12-22 06:13:27,703 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:13:27,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:13:27,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:13:27,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:13:27,704 INFO L87 Difference]: Start difference. First operand 2402 states and 4526 transitions. Second operand 4 states. [2020-12-22 06:13:27,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:13:27,954 INFO L93 Difference]: Finished difference Result 4761 states and 8985 transitions. [2020-12-22 06:13:27,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:13:27,954 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 52 [2020-12-22 06:13:27,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:13:27,971 INFO L225 Difference]: With dead ends: 4761 [2020-12-22 06:13:27,971 INFO L226 Difference]: Without dead ends: 2402 [2020-12-22 06:13:27,976 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 06:13:27,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2402 states. [2020-12-22 06:13:28,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2402 to 2402. [2020-12-22 06:13:28,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2402 states. [2020-12-22 06:13:28,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2402 states to 2402 states and 4522 transitions. [2020-12-22 06:13:28,091 INFO L78 Accepts]: Start accepts. Automaton has 2402 states and 4522 transitions. Word has length 52 [2020-12-22 06:13:28,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:13:28,091 INFO L481 AbstractCegarLoop]: Abstraction has 2402 states and 4522 transitions. [2020-12-22 06:13:28,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:13:28,091 INFO L276 IsEmpty]: Start isEmpty. Operand 2402 states and 4522 transitions. [2020-12-22 06:13:28,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-22 06:13:28,094 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:13:28,094 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 06:13:28,096 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 06:13:28,097 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 06:13:28,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:13:28,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1332381396, now seen corresponding path program 1 times [2020-12-22 06:13:28,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:13:28,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136587606] [2020-12-22 06:13:28,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:13:28,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:13:28,192 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 06:13:28,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136587606] [2020-12-22 06:13:28,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:13:28,193 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:13:28,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688780680] [2020-12-22 06:13:28,194 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:13:28,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:13:28,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:13:28,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:13:28,196 INFO L87 Difference]: Start difference. First operand 2402 states and 4522 transitions. Second operand 4 states. [2020-12-22 06:13:28,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:13:28,407 INFO L93 Difference]: Finished difference Result 4761 states and 8981 transitions. [2020-12-22 06:13:28,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:13:28,409 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 53 [2020-12-22 06:13:28,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:13:28,428 INFO L225 Difference]: With dead ends: 4761 [2020-12-22 06:13:28,428 INFO L226 Difference]: Without dead ends: 2402 [2020-12-22 06:13:28,434 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 06:13:28,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2402 states. [2020-12-22 06:13:28,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2402 to 2402. [2020-12-22 06:13:28,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2402 states. [2020-12-22 06:13:28,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2402 states to 2402 states and 4518 transitions. [2020-12-22 06:13:28,581 INFO L78 Accepts]: Start accepts. Automaton has 2402 states and 4518 transitions. Word has length 53 [2020-12-22 06:13:28,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:13:28,581 INFO L481 AbstractCegarLoop]: Abstraction has 2402 states and 4518 transitions. [2020-12-22 06:13:28,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:13:28,581 INFO L276 IsEmpty]: Start isEmpty. Operand 2402 states and 4518 transitions. [2020-12-22 06:13:28,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-22 06:13:28,586 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:13:28,586 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 06:13:28,586 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 06:13:28,587 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 06:13:28,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:13:28,587 INFO L82 PathProgramCache]: Analyzing trace with hash 1423663956, now seen corresponding path program 1 times [2020-12-22 06:13:28,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:13:28,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162485229] [2020-12-22 06:13:28,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:13:28,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:13:28,704 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 06:13:28,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162485229] [2020-12-22 06:13:28,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:13:28,705 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:13:28,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307421476] [2020-12-22 06:13:28,707 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:13:28,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:13:28,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:13:28,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:13:28,708 INFO L87 Difference]: Start difference. First operand 2402 states and 4518 transitions. Second operand 4 states. [2020-12-22 06:13:28,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:13:28,848 INFO L93 Difference]: Finished difference Result 4761 states and 8977 transitions. [2020-12-22 06:13:28,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:13:28,849 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 53 [2020-12-22 06:13:28,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:13:28,865 INFO L225 Difference]: With dead ends: 4761 [2020-12-22 06:13:28,865 INFO L226 Difference]: Without dead ends: 2381 [2020-12-22 06:13:28,871 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 06:13:28,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2381 states. [2020-12-22 06:13:28,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2381 to 2381. [2020-12-22 06:13:28,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2381 states. [2020-12-22 06:13:28,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2381 states to 2381 states and 4484 transitions. [2020-12-22 06:13:28,999 INFO L78 Accepts]: Start accepts. Automaton has 2381 states and 4484 transitions. Word has length 53 [2020-12-22 06:13:29,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:13:29,000 INFO L481 AbstractCegarLoop]: Abstraction has 2381 states and 4484 transitions. [2020-12-22 06:13:29,000 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:13:29,000 INFO L276 IsEmpty]: Start isEmpty. Operand 2381 states and 4484 transitions. [2020-12-22 06:13:29,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 06:13:29,003 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:13:29,003 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 06:13:29,004 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 06:13:29,004 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 06:13:29,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:13:29,010 INFO L82 PathProgramCache]: Analyzing trace with hash 2120537977, now seen corresponding path program 1 times [2020-12-22 06:13:29,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:13:29,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776458844] [2020-12-22 06:13:29,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:13:29,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:13:29,117 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 06:13:29,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776458844] [2020-12-22 06:13:29,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:13:29,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:13:29,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786247454] [2020-12-22 06:13:29,120 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:13:29,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:13:29,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:13:29,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:13:29,122 INFO L87 Difference]: Start difference. First operand 2381 states and 4484 transitions. Second operand 4 states. [2020-12-22 06:13:29,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:13:29,286 INFO L93 Difference]: Finished difference Result 4740 states and 8943 transitions. [2020-12-22 06:13:29,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:13:29,287 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 54 [2020-12-22 06:13:29,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:13:29,303 INFO L225 Difference]: With dead ends: 4740 [2020-12-22 06:13:29,303 INFO L226 Difference]: Without dead ends: 2381 [2020-12-22 06:13:29,310 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 06:13:29,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2381 states. [2020-12-22 06:13:29,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2381 to 2381. [2020-12-22 06:13:29,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2381 states. [2020-12-22 06:13:29,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2381 states to 2381 states and 4483 transitions. [2020-12-22 06:13:29,439 INFO L78 Accepts]: Start accepts. Automaton has 2381 states and 4483 transitions. Word has length 54 [2020-12-22 06:13:29,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:13:29,439 INFO L481 AbstractCegarLoop]: Abstraction has 2381 states and 4483 transitions. [2020-12-22 06:13:29,439 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:13:29,440 INFO L276 IsEmpty]: Start isEmpty. Operand 2381 states and 4483 transitions. [2020-12-22 06:13:29,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 06:13:29,442 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:13:29,443 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 06:13:29,443 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 06:13:29,443 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 06:13:29,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:13:29,444 INFO L82 PathProgramCache]: Analyzing trace with hash 821058105, now seen corresponding path program 1 times [2020-12-22 06:13:29,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:13:29,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691478248] [2020-12-22 06:13:29,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:13:29,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:13:29,560 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 06:13:29,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691478248] [2020-12-22 06:13:29,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:13:29,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:13:29,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721049157] [2020-12-22 06:13:29,562 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:13:29,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:13:29,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:13:29,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:13:29,563 INFO L87 Difference]: Start difference. First operand 2381 states and 4483 transitions. Second operand 4 states. [2020-12-22 06:13:29,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:13:29,754 INFO L93 Difference]: Finished difference Result 4740 states and 8942 transitions. [2020-12-22 06:13:29,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:13:29,755 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 55 [2020-12-22 06:13:29,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:13:29,771 INFO L225 Difference]: With dead ends: 4740 [2020-12-22 06:13:29,772 INFO L226 Difference]: Without dead ends: 2381 [2020-12-22 06:13:29,776 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 06:13:29,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2381 states. [2020-12-22 06:13:29,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2381 to 2381. [2020-12-22 06:13:29,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2381 states. [2020-12-22 06:13:29,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2381 states to 2381 states and 4482 transitions. [2020-12-22 06:13:29,918 INFO L78 Accepts]: Start accepts. Automaton has 2381 states and 4482 transitions. Word has length 55 [2020-12-22 06:13:29,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:13:29,918 INFO L481 AbstractCegarLoop]: Abstraction has 2381 states and 4482 transitions. [2020-12-22 06:13:29,918 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:13:29,918 INFO L276 IsEmpty]: Start isEmpty. Operand 2381 states and 4482 transitions. [2020-12-22 06:13:29,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-22 06:13:29,921 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:13:29,921 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] [2020-12-22 06:13:29,922 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 06:13:29,922 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 06:13:29,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:13:29,923 INFO L82 PathProgramCache]: Analyzing trace with hash -770642370, now seen corresponding path program 1 times [2020-12-22 06:13:29,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:13:29,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183230420] [2020-12-22 06:13:29,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:13:29,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:13:30,067 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 06:13:30,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183230420] [2020-12-22 06:13:30,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:13:30,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 06:13:30,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878116531] [2020-12-22 06:13:30,074 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 06:13:30,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:13:30,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 06:13:30,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 06:13:30,076 INFO L87 Difference]: Start difference. First operand 2381 states and 4482 transitions. Second operand 7 states. [2020-12-22 06:13:30,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:13:30,433 INFO L93 Difference]: Finished difference Result 4734 states and 8930 transitions. [2020-12-22 06:13:30,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 06:13:30,434 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 56 [2020-12-22 06:13:30,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:13:30,471 INFO L225 Difference]: With dead ends: 4734 [2020-12-22 06:13:30,472 INFO L226 Difference]: Without dead ends: 2381 [2020-12-22 06:13:30,479 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 06:13:30,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2381 states. [2020-12-22 06:13:30,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2381 to 2381. [2020-12-22 06:13:30,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2381 states. [2020-12-22 06:13:30,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2381 states to 2381 states and 4481 transitions. [2020-12-22 06:13:30,598 INFO L78 Accepts]: Start accepts. Automaton has 2381 states and 4481 transitions. Word has length 56 [2020-12-22 06:13:30,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:13:30,598 INFO L481 AbstractCegarLoop]: Abstraction has 2381 states and 4481 transitions. [2020-12-22 06:13:30,598 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 06:13:30,598 INFO L276 IsEmpty]: Start isEmpty. Operand 2381 states and 4481 transitions. [2020-12-22 06:13:30,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-22 06:13:30,601 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:13:30,601 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 06:13:30,601 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 06:13:30,602 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 06:13:30,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:13:30,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1186467438, now seen corresponding path program 1 times [2020-12-22 06:13:30,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:13:30,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444467544] [2020-12-22 06:13:30,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:13:30,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:13:30,732 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 06:13:30,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444467544] [2020-12-22 06:13:30,733 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:13:30,733 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:13:30,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425945036] [2020-12-22 06:13:30,734 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:13:30,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:13:30,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:13:30,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:13:30,735 INFO L87 Difference]: Start difference. First operand 2381 states and 4481 transitions. Second operand 4 states. [2020-12-22 06:13:32,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:13:32,137 INFO L93 Difference]: Finished difference Result 6609 states and 12504 transitions. [2020-12-22 06:13:32,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:13:32,138 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 57 [2020-12-22 06:13:32,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:13:32,152 INFO L225 Difference]: With dead ends: 6609 [2020-12-22 06:13:32,152 INFO L226 Difference]: Without dead ends: 4262 [2020-12-22 06:13:32,158 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:13:32,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4262 states. [2020-12-22 06:13:32,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4262 to 2381. [2020-12-22 06:13:32,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2381 states. [2020-12-22 06:13:32,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2381 states to 2381 states and 4475 transitions. [2020-12-22 06:13:32,310 INFO L78 Accepts]: Start accepts. Automaton has 2381 states and 4475 transitions. Word has length 57 [2020-12-22 06:13:32,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:13:32,310 INFO L481 AbstractCegarLoop]: Abstraction has 2381 states and 4475 transitions. [2020-12-22 06:13:32,310 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:13:32,310 INFO L276 IsEmpty]: Start isEmpty. Operand 2381 states and 4475 transitions. [2020-12-22 06:13:32,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-22 06:13:32,313 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:13:32,313 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 06:13:32,313 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 06:13:32,313 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 06:13:32,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:13:32,314 INFO L82 PathProgramCache]: Analyzing trace with hash -1785499822, now seen corresponding path program 1 times [2020-12-22 06:13:32,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:13:32,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960239580] [2020-12-22 06:13:32,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:13:32,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:13:32,410 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 06:13:32,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960239580] [2020-12-22 06:13:32,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:13:32,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:13:32,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591267023] [2020-12-22 06:13:32,411 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:13:32,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:13:32,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:13:32,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:13:32,415 INFO L87 Difference]: Start difference. First operand 2381 states and 4475 transitions. Second operand 4 states. [2020-12-22 06:13:33,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:13:33,754 INFO L93 Difference]: Finished difference Result 6609 states and 12493 transitions. [2020-12-22 06:13:33,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:13:33,755 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 59 [2020-12-22 06:13:33,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:13:33,769 INFO L225 Difference]: With dead ends: 6609 [2020-12-22 06:13:33,769 INFO L226 Difference]: Without dead ends: 4262 [2020-12-22 06:13:33,776 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:13:33,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4262 states. [2020-12-22 06:13:33,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4262 to 2381. [2020-12-22 06:13:33,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2381 states. [2020-12-22 06:13:33,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2381 states to 2381 states and 4469 transitions. [2020-12-22 06:13:33,932 INFO L78 Accepts]: Start accepts. Automaton has 2381 states and 4469 transitions. Word has length 59 [2020-12-22 06:13:33,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:13:33,932 INFO L481 AbstractCegarLoop]: Abstraction has 2381 states and 4469 transitions. [2020-12-22 06:13:33,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:13:33,932 INFO L276 IsEmpty]: Start isEmpty. Operand 2381 states and 4469 transitions. [2020-12-22 06:13:33,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-22 06:13:33,941 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:13:33,941 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] [2020-12-22 06:13:33,941 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 06:13:33,942 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 06:13:33,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:13:33,942 INFO L82 PathProgramCache]: Analyzing trace with hash -159656840, now seen corresponding path program 1 times [2020-12-22 06:13:33,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:13:33,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306992993] [2020-12-22 06:13:33,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:13:33,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:13:34,052 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 06:13:34,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306992993] [2020-12-22 06:13:34,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:13:34,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:13:34,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206149364] [2020-12-22 06:13:34,054 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:13:34,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:13:34,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:13:34,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:13:34,055 INFO L87 Difference]: Start difference. First operand 2381 states and 4469 transitions. Second operand 4 states. [2020-12-22 06:13:35,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:13:35,293 INFO L93 Difference]: Finished difference Result 6609 states and 12482 transitions. [2020-12-22 06:13:35,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:13:35,294 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 61 [2020-12-22 06:13:35,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:13:35,309 INFO L225 Difference]: With dead ends: 6609 [2020-12-22 06:13:35,309 INFO L226 Difference]: Without dead ends: 4262 [2020-12-22 06:13:35,315 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:13:35,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4262 states. [2020-12-22 06:13:35,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4262 to 2381. [2020-12-22 06:13:35,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2381 states. [2020-12-22 06:13:35,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2381 states to 2381 states and 4463 transitions. [2020-12-22 06:13:35,471 INFO L78 Accepts]: Start accepts. Automaton has 2381 states and 4463 transitions. Word has length 61 [2020-12-22 06:13:35,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:13:35,471 INFO L481 AbstractCegarLoop]: Abstraction has 2381 states and 4463 transitions. [2020-12-22 06:13:35,471 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:13:35,472 INFO L276 IsEmpty]: Start isEmpty. Operand 2381 states and 4463 transitions. [2020-12-22 06:13:35,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 06:13:35,474 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:13:35,474 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:13:35,474 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 06:13:35,474 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 06:13:35,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:13:35,475 INFO L82 PathProgramCache]: Analyzing trace with hash 1478523122, now seen corresponding path program 1 times [2020-12-22 06:13:35,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:13:35,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188997277] [2020-12-22 06:13:35,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:13:35,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:13:35,596 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 06:13:35,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188997277] [2020-12-22 06:13:35,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:13:35,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:13:35,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732156777] [2020-12-22 06:13:35,598 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:13:35,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:13:35,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:13:35,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:13:35,599 INFO L87 Difference]: Start difference. First operand 2381 states and 4463 transitions. Second operand 4 states. [2020-12-22 06:13:36,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:13:36,778 INFO L93 Difference]: Finished difference Result 6609 states and 12471 transitions. [2020-12-22 06:13:36,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:13:36,779 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 63 [2020-12-22 06:13:36,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:13:36,792 INFO L225 Difference]: With dead ends: 6609 [2020-12-22 06:13:36,792 INFO L226 Difference]: Without dead ends: 4262 [2020-12-22 06:13:36,803 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:13:36,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4262 states. [2020-12-22 06:13:36,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4262 to 2381. [2020-12-22 06:13:36,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2381 states. [2020-12-22 06:13:36,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2381 states to 2381 states and 4457 transitions. [2020-12-22 06:13:36,934 INFO L78 Accepts]: Start accepts. Automaton has 2381 states and 4457 transitions. Word has length 63 [2020-12-22 06:13:36,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:13:36,935 INFO L481 AbstractCegarLoop]: Abstraction has 2381 states and 4457 transitions. [2020-12-22 06:13:36,936 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:13:36,936 INFO L276 IsEmpty]: Start isEmpty. Operand 2381 states and 4457 transitions. [2020-12-22 06:13:36,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 06:13:36,941 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:13:36,941 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 06:13:36,941 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 06:13:36,942 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 06:13:36,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:13:36,942 INFO L82 PathProgramCache]: Analyzing trace with hash 246204418, now seen corresponding path program 1 times [2020-12-22 06:13:36,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:13:36,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330872113] [2020-12-22 06:13:36,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:13:36,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:13:37,046 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 06:13:37,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330872113] [2020-12-22 06:13:37,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:13:37,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:13:37,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234494857] [2020-12-22 06:13:37,047 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 06:13:37,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:13:37,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 06:13:37,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 06:13:37,048 INFO L87 Difference]: Start difference. First operand 2381 states and 4457 transitions. Second operand 6 states. [2020-12-22 06:13:40,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:13:40,355 INFO L93 Difference]: Finished difference Result 23756 states and 44734 transitions. [2020-12-22 06:13:40,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 06:13:40,359 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-12-22 06:13:40,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:13:40,426 INFO L225 Difference]: With dead ends: 23756 [2020-12-22 06:13:40,427 INFO L226 Difference]: Without dead ends: 22367 [2020-12-22 06:13:40,438 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-12-22 06:13:40,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22367 states. [2020-12-22 06:13:40,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22367 to 4727. [2020-12-22 06:13:40,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4727 states. [2020-12-22 06:13:40,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4727 states to 4727 states and 8871 transitions. [2020-12-22 06:13:40,823 INFO L78 Accepts]: Start accepts. Automaton has 4727 states and 8871 transitions. Word has length 65 [2020-12-22 06:13:40,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:13:40,824 INFO L481 AbstractCegarLoop]: Abstraction has 4727 states and 8871 transitions. [2020-12-22 06:13:40,824 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 06:13:40,824 INFO L276 IsEmpty]: Start isEmpty. Operand 4727 states and 8871 transitions. [2020-12-22 06:13:40,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 06:13:40,829 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:13:40,829 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 06:13:40,829 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 06:13:40,829 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 06:13:40,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:13:40,830 INFO L82 PathProgramCache]: Analyzing trace with hash -449809220, now seen corresponding path program 1 times [2020-12-22 06:13:40,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:13:40,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013531358] [2020-12-22 06:13:40,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:13:40,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:13:40,929 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 06:13:40,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013531358] [2020-12-22 06:13:40,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:13:40,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:13:40,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041492863] [2020-12-22 06:13:40,932 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:13:40,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:13:40,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:13:40,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:13:40,933 INFO L87 Difference]: Start difference. First operand 4727 states and 8871 transitions. Second operand 5 states. [2020-12-22 06:13:41,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:13:41,908 INFO L93 Difference]: Finished difference Result 21161 states and 39707 transitions. [2020-12-22 06:13:41,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 06:13:41,909 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 67 [2020-12-22 06:13:41,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:13:41,961 INFO L225 Difference]: With dead ends: 21161 [2020-12-22 06:13:41,962 INFO L226 Difference]: Without dead ends: 18270 [2020-12-22 06:13:41,974 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 06:13:41,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18270 states. [2020-12-22 06:13:42,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18270 to 6897. [2020-12-22 06:13:42,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6897 states. [2020-12-22 06:13:42,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6897 states to 6897 states and 12923 transitions. [2020-12-22 06:13:42,530 INFO L78 Accepts]: Start accepts. Automaton has 6897 states and 12923 transitions. Word has length 67 [2020-12-22 06:13:42,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:13:42,530 INFO L481 AbstractCegarLoop]: Abstraction has 6897 states and 12923 transitions. [2020-12-22 06:13:42,530 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:13:42,531 INFO L276 IsEmpty]: Start isEmpty. Operand 6897 states and 12923 transitions. [2020-12-22 06:13:42,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-22 06:13:42,535 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:13:42,535 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:13:42,535 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 06:13:42,535 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 06:13:42,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:13:42,536 INFO L82 PathProgramCache]: Analyzing trace with hash -1401731930, now seen corresponding path program 1 times [2020-12-22 06:13:42,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:13:42,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754999955] [2020-12-22 06:13:42,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:13:42,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:13:42,611 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 06:13:42,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754999955] [2020-12-22 06:13:42,614 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:13:42,614 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:13:42,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725382654] [2020-12-22 06:13:42,615 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:13:42,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:13:42,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:13:42,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:13:42,616 INFO L87 Difference]: Start difference. First operand 6897 states and 12923 transitions. Second operand 5 states. [2020-12-22 06:13:43,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:13:43,036 INFO L93 Difference]: Finished difference Result 11611 states and 21749 transitions. [2020-12-22 06:13:43,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 06:13:43,037 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 69 [2020-12-22 06:13:43,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:13:43,052 INFO L225 Difference]: With dead ends: 11611 [2020-12-22 06:13:43,052 INFO L226 Difference]: Without dead ends: 6916 [2020-12-22 06:13:43,061 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 06:13:43,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6916 states. [2020-12-22 06:13:43,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6916 to 6897. [2020-12-22 06:13:43,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6897 states. [2020-12-22 06:13:43,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6897 states to 6897 states and 12907 transitions. [2020-12-22 06:13:43,477 INFO L78 Accepts]: Start accepts. Automaton has 6897 states and 12907 transitions. Word has length 69 [2020-12-22 06:13:43,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:13:43,478 INFO L481 AbstractCegarLoop]: Abstraction has 6897 states and 12907 transitions. [2020-12-22 06:13:43,478 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:13:43,478 INFO L276 IsEmpty]: Start isEmpty. Operand 6897 states and 12907 transitions. [2020-12-22 06:13:43,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-22 06:13:43,483 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:13:43,483 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:13:43,483 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 06:13:43,483 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 06:13:43,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:13:43,484 INFO L82 PathProgramCache]: Analyzing trace with hash -1143566492, now seen corresponding path program 1 times [2020-12-22 06:13:43,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:13:43,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880296387] [2020-12-22 06:13:43,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:13:43,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:13:43,585 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 06:13:43,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880296387] [2020-12-22 06:13:43,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:13:43,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:13:43,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185242377] [2020-12-22 06:13:43,586 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 06:13:43,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:13:43,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 06:13:43,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-12-22 06:13:43,587 INFO L87 Difference]: Start difference. First operand 6897 states and 12907 transitions. Second operand 6 states. [2020-12-22 06:13:44,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:13:44,714 INFO L93 Difference]: Finished difference Result 27955 states and 52479 transitions. [2020-12-22 06:13:44,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 06:13:44,714 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 69 [2020-12-22 06:13:44,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:13:44,751 INFO L225 Difference]: With dead ends: 27955 [2020-12-22 06:13:44,751 INFO L226 Difference]: Without dead ends: 21660 [2020-12-22 06:13:44,766 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 06:13:44,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21660 states. [2020-12-22 06:13:45,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21660 to 17073. [2020-12-22 06:13:45,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17073 states. [2020-12-22 06:13:45,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17073 states to 17073 states and 31967 transitions. [2020-12-22 06:13:45,817 INFO L78 Accepts]: Start accepts. Automaton has 17073 states and 31967 transitions. Word has length 69 [2020-12-22 06:13:45,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:13:45,818 INFO L481 AbstractCegarLoop]: Abstraction has 17073 states and 31967 transitions. [2020-12-22 06:13:45,818 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 06:13:45,818 INFO L276 IsEmpty]: Start isEmpty. Operand 17073 states and 31967 transitions. [2020-12-22 06:13:45,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 06:13:45,823 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:13:45,823 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:13:45,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 06:13:45,824 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 06:13:45,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:13:45,824 INFO L82 PathProgramCache]: Analyzing trace with hash 1678223410, now seen corresponding path program 1 times [2020-12-22 06:13:45,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:13:45,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377665415] [2020-12-22 06:13:45,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:13:45,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:13:45,913 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 06:13:45,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377665415] [2020-12-22 06:13:45,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:13:45,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:13:45,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252981866] [2020-12-22 06:13:45,916 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 06:13:45,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:13:45,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 06:13:45,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-12-22 06:13:45,917 INFO L87 Difference]: Start difference. First operand 17073 states and 31967 transitions. Second operand 6 states. [2020-12-22 06:13:48,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:13:48,439 INFO L93 Difference]: Finished difference Result 76131 states and 142633 transitions. [2020-12-22 06:13:48,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 06:13:48,440 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 70 [2020-12-22 06:13:48,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:13:48,542 INFO L225 Difference]: With dead ends: 76131 [2020-12-22 06:13:48,542 INFO L226 Difference]: Without dead ends: 59662 [2020-12-22 06:13:48,569 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 06:13:48,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59662 states. [2020-12-22 06:13:50,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59662 to 46167. [2020-12-22 06:13:50,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46167 states. [2020-12-22 06:13:50,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46167 states to 46167 states and 86341 transitions. [2020-12-22 06:13:50,861 INFO L78 Accepts]: Start accepts. Automaton has 46167 states and 86341 transitions. Word has length 70 [2020-12-22 06:13:50,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:13:50,861 INFO L481 AbstractCegarLoop]: Abstraction has 46167 states and 86341 transitions. [2020-12-22 06:13:50,861 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 06:13:50,861 INFO L276 IsEmpty]: Start isEmpty. Operand 46167 states and 86341 transitions. [2020-12-22 06:13:50,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-22 06:13:50,866 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:13:50,866 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:13:50,866 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 06:13:50,867 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 06:13:50,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:13:50,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1487940567, now seen corresponding path program 1 times [2020-12-22 06:13:50,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:13:50,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317106943] [2020-12-22 06:13:50,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:13:50,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:13:50,957 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 06:13:50,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317106943] [2020-12-22 06:13:50,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:13:50,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:13:50,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369361877] [2020-12-22 06:13:50,959 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 06:13:50,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:13:50,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 06:13:50,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-12-22 06:13:50,960 INFO L87 Difference]: Start difference. First operand 46167 states and 86341 transitions. Second operand 6 states. [2020-12-22 06:13:57,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:13:57,305 INFO L93 Difference]: Finished difference Result 216209 states and 404237 transitions. [2020-12-22 06:13:57,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 06:13:57,305 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 71 [2020-12-22 06:13:57,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:13:57,786 INFO L225 Difference]: With dead ends: 216209 [2020-12-22 06:13:57,786 INFO L226 Difference]: Without dead ends: 170648 [2020-12-22 06:13:57,861 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 06:13:58,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170648 states. [2020-12-22 06:14:03,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170648 to 130613. [2020-12-22 06:14:03,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130613 states. [2020-12-22 06:14:04,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130613 states to 130613 states and 243881 transitions. [2020-12-22 06:14:04,216 INFO L78 Accepts]: Start accepts. Automaton has 130613 states and 243881 transitions. Word has length 71 [2020-12-22 06:14:04,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:14:04,217 INFO L481 AbstractCegarLoop]: Abstraction has 130613 states and 243881 transitions. [2020-12-22 06:14:04,217 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 06:14:04,217 INFO L276 IsEmpty]: Start isEmpty. Operand 130613 states and 243881 transitions. [2020-12-22 06:14:04,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 06:14:04,223 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:14:04,223 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:14:04,223 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 06:14:04,223 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 06:14:04,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:14:04,224 INFO L82 PathProgramCache]: Analyzing trace with hash -1302113769, now seen corresponding path program 1 times [2020-12-22 06:14:04,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:14:04,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779332573] [2020-12-22 06:14:04,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:14:04,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:14:04,588 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 06:14:04,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779332573] [2020-12-22 06:14:04,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:14:04,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:14:04,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926489145] [2020-12-22 06:14:04,590 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 06:14:04,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:14:04,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 06:14:04,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-12-22 06:14:04,591 INFO L87 Difference]: Start difference. First operand 130613 states and 243881 transitions. Second operand 6 states. [2020-12-22 06:14:21,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:14:21,978 INFO L93 Difference]: Finished difference Result 627551 states and 1171287 transitions. [2020-12-22 06:14:21,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 06:14:21,979 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 72 [2020-12-22 06:14:21,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:14:23,465 INFO L225 Difference]: With dead ends: 627551 [2020-12-22 06:14:23,466 INFO L226 Difference]: Without dead ends: 497546 [2020-12-22 06:14:23,654 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 06:14:24,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497546 states. [2020-12-22 06:14:40,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497546 to 378323. [2020-12-22 06:14:40,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 378323 states. [2020-12-22 06:14:41,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378323 states to 378323 states and 705393 transitions. [2020-12-22 06:14:41,548 INFO L78 Accepts]: Start accepts. Automaton has 378323 states and 705393 transitions. Word has length 72 [2020-12-22 06:14:41,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:14:41,548 INFO L481 AbstractCegarLoop]: Abstraction has 378323 states and 705393 transitions. [2020-12-22 06:14:41,548 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 06:14:41,548 INFO L276 IsEmpty]: Start isEmpty. Operand 378323 states and 705393 transitions. [2020-12-22 06:14:41,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-22 06:14:41,569 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:14:41,569 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:14:41,569 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 06:14:41,571 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 06:14:41,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:14:41,572 INFO L82 PathProgramCache]: Analyzing trace with hash -283788050, now seen corresponding path program 1 times [2020-12-22 06:14:41,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:14:41,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577789280] [2020-12-22 06:14:41,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:14:41,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:14:41,681 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 06:14:41,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577789280] [2020-12-22 06:14:41,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:14:41,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:14:41,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463662309] [2020-12-22 06:14:41,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 06:14:41,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:14:41,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 06:14:41,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-12-22 06:14:41,686 INFO L87 Difference]: Start difference. First operand 378323 states and 705393 transitions. Second operand 6 states. [2020-12-22 06:15:38,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:15:38,439 INFO L93 Difference]: Finished difference Result 1843437 states and 3436137 transitions. [2020-12-22 06:15:38,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 06:15:38,440 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 73 [2020-12-22 06:15:38,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:15:44,148 INFO L225 Difference]: With dead ends: 1843437 [2020-12-22 06:15:44,148 INFO L226 Difference]: Without dead ends: 1465724 [2020-12-22 06:15:45,714 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 06:15:47,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1465724 states.