/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_product25.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 06:13:35,051 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 06:13:35,054 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 06:13:35,097 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 06:13:35,098 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 06:13:35,099 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 06:13:35,101 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 06:13:35,103 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 06:13:35,106 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 06:13:35,107 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 06:13:35,108 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 06:13:35,110 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 06:13:35,110 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 06:13:35,112 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 06:13:35,113 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 06:13:35,115 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 06:13:35,116 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 06:13:35,117 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 06:13:35,119 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 06:13:35,122 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 06:13:35,124 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 06:13:35,125 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 06:13:35,127 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 06:13:35,139 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 06:13:35,147 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 06:13:35,152 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 06:13:35,156 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 06:13:35,157 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 06:13:35,159 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 06:13:35,161 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 06:13:35,162 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 06:13:35,163 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 06:13:35,163 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 06:13:35,164 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 06:13:35,166 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 06:13:35,167 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 06:13:35,171 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 06:13:35,227 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 06:13:35,227 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 06:13:35,232 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 06:13:35,233 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 06:13:35,233 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 06:13:35,233 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 06:13:35,233 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 06:13:35,234 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 06:13:35,234 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 06:13:35,234 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 06:13:35,235 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 06:13:35,235 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 06:13:35,236 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 06:13:35,236 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 06:13:35,236 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 06:13:35,236 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 06:13:35,237 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 06:13:35,237 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 06:13:35,237 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 06:13:35,237 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 06:13:35,238 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 06:13:35,238 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 06:13:35,238 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 06:13:35,238 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 06:13:35,239 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 06:13:35,239 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 06:13:35,671 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 06:13:35,710 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 06:13:35,714 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 06:13:35,715 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 06:13:35,716 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 06:13:35,717 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/product-lines/elevator_spec9_product25.cil.c [2020-12-22 06:13:35,812 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71d8f137d/22a5b0c6dd014bd492d24d5907b28519/FLAG990f6affe [2020-12-22 06:13:36,531 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 06:13:36,532 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec9_product25.cil.c [2020-12-22 06:13:36,572 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71d8f137d/22a5b0c6dd014bd492d24d5907b28519/FLAG990f6affe [2020-12-22 06:13:36,757 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71d8f137d/22a5b0c6dd014bd492d24d5907b28519 [2020-12-22 06:13:36,761 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 06:13:36,764 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 06:13:36,769 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 06:13:36,769 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 06:13:36,774 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 06:13:36,775 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 06:13:36" (1/1) ... [2020-12-22 06:13:36,778 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@190b378f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:13:36, skipping insertion in model container [2020-12-22 06:13:36,779 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 06:13:36" (1/1) ... [2020-12-22 06:13:36,792 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 06:13:36,893 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 06:13:37,553 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_product25.cil.c[23164,23177] [2020-12-22 06:13:37,820 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 06:13:37,839 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 06:13:37,900 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_product25.cil.c[23164,23177] [2020-12-22 06:13:37,952 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 06:13:38,020 INFO L208 MainTranslator]: Completed translation [2020-12-22 06:13:38,021 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:13:38 WrapperNode [2020-12-22 06:13:38,021 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 06:13:38,023 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 06:13:38,023 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 06:13:38,023 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 06:13:38,032 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:13:38" (1/1) ... [2020-12-22 06:13:38,065 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:13:38" (1/1) ... [2020-12-22 06:13:38,336 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 06:13:38,338 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 06:13:38,338 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 06:13:38,339 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 06:13:38,353 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:13:38" (1/1) ... [2020-12-22 06:13:38,354 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:13:38" (1/1) ... [2020-12-22 06:13:38,391 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:13:38" (1/1) ... [2020-12-22 06:13:38,392 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:13:38" (1/1) ... [2020-12-22 06:13:38,489 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:13:38" (1/1) ... [2020-12-22 06:13:38,541 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:13:38" (1/1) ... [2020-12-22 06:13:38,558 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:13:38" (1/1) ... [2020-12-22 06:13:38,585 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 06:13:38,586 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 06:13:38,587 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 06:13:38,587 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 06:13:38,588 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:13:38" (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 06:13:38,698 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 06:13:38,698 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 06:13:38,699 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 06:13:38,699 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 06:13:44,803 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 06:13:44,804 INFO L299 CfgBuilder]: Removed 589 assume(true) statements. [2020-12-22 06:13:44,813 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 06:13:44 BoogieIcfgContainer [2020-12-22 06:13:44,814 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 06:13:44,816 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 06:13:44,817 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 06:13:44,821 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 06:13:44,823 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 06:13:36" (1/3) ... [2020-12-22 06:13:44,825 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b19ab2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 06:13:44, skipping insertion in model container [2020-12-22 06:13:44,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:13:38" (2/3) ... [2020-12-22 06:13:44,826 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b19ab2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 06:13:44, skipping insertion in model container [2020-12-22 06:13:44,827 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 06:13:44" (3/3) ... [2020-12-22 06:13:44,829 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec9_product25.cil.c [2020-12-22 06:13:44,840 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 06:13:44,848 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2020-12-22 06:13:44,869 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-12-22 06:13:44,926 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 06:13:44,926 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 06:13:44,926 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 06:13:44,927 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 06:13:44,927 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 06:13:44,927 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 06:13:44,927 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 06:13:44,927 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 06:13:44,989 INFO L276 IsEmpty]: Start isEmpty. Operand 2512 states. [2020-12-22 06:13:45,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 06:13:45,009 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:13:45,011 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:13:45,011 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 06:13:45,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:13:45,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1633009766, now seen corresponding path program 1 times [2020-12-22 06:13:45,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:13:45,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897316904] [2020-12-22 06:13:45,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:13:45,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:13:45,430 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 06:13:45,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897316904] [2020-12-22 06:13:45,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:13:45,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:13:45,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608854826] [2020-12-22 06:13:45,438 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:13:45,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:13:45,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:13:45,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:13:45,457 INFO L87 Difference]: Start difference. First operand 2512 states. Second operand 3 states. [2020-12-22 06:13:45,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:13:45,776 INFO L93 Difference]: Finished difference Result 5015 states and 9469 transitions. [2020-12-22 06:13:45,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:13:45,778 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 37 [2020-12-22 06:13:45,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:13:45,825 INFO L225 Difference]: With dead ends: 5015 [2020-12-22 06:13:45,825 INFO L226 Difference]: Without dead ends: 2508 [2020-12-22 06:13:45,841 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 06:13:45,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2508 states. [2020-12-22 06:13:46,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2508 to 2508. [2020-12-22 06:13:46,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2508 states. [2020-12-22 06:13:46,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2508 states to 2508 states and 4725 transitions. [2020-12-22 06:13:46,068 INFO L78 Accepts]: Start accepts. Automaton has 2508 states and 4725 transitions. Word has length 37 [2020-12-22 06:13:46,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:13:46,068 INFO L481 AbstractCegarLoop]: Abstraction has 2508 states and 4725 transitions. [2020-12-22 06:13:46,068 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:13:46,068 INFO L276 IsEmpty]: Start isEmpty. Operand 2508 states and 4725 transitions. [2020-12-22 06:13:46,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-22 06:13:46,074 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:13:46,074 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] [2020-12-22 06:13:46,076 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 06:13:46,076 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 06:13:46,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:13:46,079 INFO L82 PathProgramCache]: Analyzing trace with hash -56341435, now seen corresponding path program 1 times [2020-12-22 06:13:46,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:13:46,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728425400] [2020-12-22 06:13:46,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:13:46,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:13:46,279 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 06:13:46,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728425400] [2020-12-22 06:13:46,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:13:46,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 06:13:46,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454332449] [2020-12-22 06:13:46,281 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 06:13:46,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:13:46,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 06:13:46,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 06:13:46,283 INFO L87 Difference]: Start difference. First operand 2508 states and 4725 transitions. Second operand 6 states. [2020-12-22 06:13:46,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:13:46,537 INFO L93 Difference]: Finished difference Result 4967 states and 9366 transitions. [2020-12-22 06:13:46,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 06:13:46,538 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 44 [2020-12-22 06:13:46,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:13:46,556 INFO L225 Difference]: With dead ends: 4967 [2020-12-22 06:13:46,557 INFO L226 Difference]: Without dead ends: 2502 [2020-12-22 06:13:46,564 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 06:13:46,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2502 states. [2020-12-22 06:13:46,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2502 to 2502. [2020-12-22 06:13:46,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2502 states. [2020-12-22 06:13:46,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2502 states to 2502 states and 4712 transitions. [2020-12-22 06:13:46,680 INFO L78 Accepts]: Start accepts. Automaton has 2502 states and 4712 transitions. Word has length 44 [2020-12-22 06:13:46,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:13:46,681 INFO L481 AbstractCegarLoop]: Abstraction has 2502 states and 4712 transitions. [2020-12-22 06:13:46,681 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 06:13:46,681 INFO L276 IsEmpty]: Start isEmpty. Operand 2502 states and 4712 transitions. [2020-12-22 06:13:46,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-22 06:13:46,686 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:13:46,687 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] [2020-12-22 06:13:46,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 06:13:46,687 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 06:13:46,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:13:46,688 INFO L82 PathProgramCache]: Analyzing trace with hash 2055500003, now seen corresponding path program 1 times [2020-12-22 06:13:46,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:13:46,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326999674] [2020-12-22 06:13:46,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:13:46,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:13:46,862 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 06:13:46,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326999674] [2020-12-22 06:13:46,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:13:46,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:13:46,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956675796] [2020-12-22 06:13:46,865 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:13:46,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:13:46,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:13:46,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:13:46,866 INFO L87 Difference]: Start difference. First operand 2502 states and 4712 transitions. Second operand 4 states. [2020-12-22 06:13:47,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:13:47,156 INFO L93 Difference]: Finished difference Result 4961 states and 9353 transitions. [2020-12-22 06:13:47,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:13:47,157 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 45 [2020-12-22 06:13:47,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:13:47,173 INFO L225 Difference]: With dead ends: 4961 [2020-12-22 06:13:47,174 INFO L226 Difference]: Without dead ends: 2502 [2020-12-22 06:13:47,179 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 06:13:47,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2502 states. [2020-12-22 06:13:47,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2502 to 2502. [2020-12-22 06:13:47,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2502 states. [2020-12-22 06:13:47,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2502 states to 2502 states and 4708 transitions. [2020-12-22 06:13:47,283 INFO L78 Accepts]: Start accepts. Automaton has 2502 states and 4708 transitions. Word has length 45 [2020-12-22 06:13:47,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:13:47,292 INFO L481 AbstractCegarLoop]: Abstraction has 2502 states and 4708 transitions. [2020-12-22 06:13:47,293 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:13:47,293 INFO L276 IsEmpty]: Start isEmpty. Operand 2502 states and 4708 transitions. [2020-12-22 06:13:47,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-22 06:13:47,296 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:13:47,296 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] [2020-12-22 06:13:47,296 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 06:13:47,296 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 06:13:47,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:13:47,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1068646936, now seen corresponding path program 1 times [2020-12-22 06:13:47,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:13:47,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827326953] [2020-12-22 06:13:47,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:13:47,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:13:47,398 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 06:13:47,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827326953] [2020-12-22 06:13:47,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:13:47,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:13:47,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006421832] [2020-12-22 06:13:47,401 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:13:47,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:13:47,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:13:47,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:13:47,403 INFO L87 Difference]: Start difference. First operand 2502 states and 4708 transitions. Second operand 4 states. [2020-12-22 06:13:47,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:13:47,599 INFO L93 Difference]: Finished difference Result 4961 states and 9349 transitions. [2020-12-22 06:13:47,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:13:47,599 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 46 [2020-12-22 06:13:47,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:13:47,614 INFO L225 Difference]: With dead ends: 4961 [2020-12-22 06:13:47,615 INFO L226 Difference]: Without dead ends: 2502 [2020-12-22 06:13:47,620 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 06:13:47,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2502 states. [2020-12-22 06:13:47,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2502 to 2502. [2020-12-22 06:13:47,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2502 states. [2020-12-22 06:13:47,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2502 states to 2502 states and 4704 transitions. [2020-12-22 06:13:47,726 INFO L78 Accepts]: Start accepts. Automaton has 2502 states and 4704 transitions. Word has length 46 [2020-12-22 06:13:47,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:13:47,726 INFO L481 AbstractCegarLoop]: Abstraction has 2502 states and 4704 transitions. [2020-12-22 06:13:47,727 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:13:47,727 INFO L276 IsEmpty]: Start isEmpty. Operand 2502 states and 4704 transitions. [2020-12-22 06:13:47,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-22 06:13:47,730 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:13:47,730 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] [2020-12-22 06:13:47,732 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 06:13:47,734 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 06:13:47,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:13:47,735 INFO L82 PathProgramCache]: Analyzing trace with hash 37586952, now seen corresponding path program 1 times [2020-12-22 06:13:47,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:13:47,736 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763889105] [2020-12-22 06:13:47,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:13:47,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:13:47,844 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 06:13:47,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763889105] [2020-12-22 06:13:47,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:13:47,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:13:47,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579202229] [2020-12-22 06:13:47,845 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:13:47,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:13:47,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:13:47,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:13:47,847 INFO L87 Difference]: Start difference. First operand 2502 states and 4704 transitions. Second operand 4 states. [2020-12-22 06:13:48,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:13:48,091 INFO L93 Difference]: Finished difference Result 4961 states and 9345 transitions. [2020-12-22 06:13:48,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:13:48,092 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2020-12-22 06:13:48,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:13:48,108 INFO L225 Difference]: With dead ends: 4961 [2020-12-22 06:13:48,108 INFO L226 Difference]: Without dead ends: 2502 [2020-12-22 06:13:48,114 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 06:13:48,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2502 states. [2020-12-22 06:13:48,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2502 to 2502. [2020-12-22 06:13:48,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2502 states. [2020-12-22 06:13:48,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2502 states to 2502 states and 4700 transitions. [2020-12-22 06:13:48,237 INFO L78 Accepts]: Start accepts. Automaton has 2502 states and 4700 transitions. Word has length 47 [2020-12-22 06:13:48,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:13:48,239 INFO L481 AbstractCegarLoop]: Abstraction has 2502 states and 4700 transitions. [2020-12-22 06:13:48,239 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:13:48,240 INFO L276 IsEmpty]: Start isEmpty. Operand 2502 states and 4700 transitions. [2020-12-22 06:13:48,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-22 06:13:48,245 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:13:48,245 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] [2020-12-22 06:13:48,245 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 06:13:48,246 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 06:13:48,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:13:48,246 INFO L82 PathProgramCache]: Analyzing trace with hash -1297234808, now seen corresponding path program 1 times [2020-12-22 06:13:48,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:13:48,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310965944] [2020-12-22 06:13:48,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:13:48,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:13:48,387 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 06:13:48,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310965944] [2020-12-22 06:13:48,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:13:48,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:13:48,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796304842] [2020-12-22 06:13:48,390 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:13:48,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:13:48,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:13:48,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:13:48,392 INFO L87 Difference]: Start difference. First operand 2502 states and 4700 transitions. Second operand 4 states. [2020-12-22 06:13:48,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:13:48,544 INFO L93 Difference]: Finished difference Result 4961 states and 9341 transitions. [2020-12-22 06:13:48,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:13:48,545 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2020-12-22 06:13:48,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:13:48,560 INFO L225 Difference]: With dead ends: 4961 [2020-12-22 06:13:48,561 INFO L226 Difference]: Without dead ends: 2481 [2020-12-22 06:13:48,566 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 06:13:48,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2481 states. [2020-12-22 06:13:48,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2481 to 2481. [2020-12-22 06:13:48,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2481 states. [2020-12-22 06:13:48,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2481 states to 2481 states and 4666 transitions. [2020-12-22 06:13:48,684 INFO L78 Accepts]: Start accepts. Automaton has 2481 states and 4666 transitions. Word has length 47 [2020-12-22 06:13:48,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:13:48,685 INFO L481 AbstractCegarLoop]: Abstraction has 2481 states and 4666 transitions. [2020-12-22 06:13:48,685 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:13:48,685 INFO L276 IsEmpty]: Start isEmpty. Operand 2481 states and 4666 transitions. [2020-12-22 06:13:48,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-22 06:13:48,687 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:13:48,688 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] [2020-12-22 06:13:48,688 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 06:13:48,688 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 06:13:48,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:13:48,694 INFO L82 PathProgramCache]: Analyzing trace with hash -858359699, now seen corresponding path program 1 times [2020-12-22 06:13:48,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:13:48,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351241419] [2020-12-22 06:13:48,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:13:48,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:13:48,777 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 06:13:48,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351241419] [2020-12-22 06:13:48,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:13:48,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:13:48,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739525030] [2020-12-22 06:13:48,779 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:13:48,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:13:48,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:13:48,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:13:48,781 INFO L87 Difference]: Start difference. First operand 2481 states and 4666 transitions. Second operand 4 states. [2020-12-22 06:13:48,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:13:48,937 INFO L93 Difference]: Finished difference Result 4940 states and 9307 transitions. [2020-12-22 06:13:48,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:13:48,938 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 48 [2020-12-22 06:13:48,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:13:48,955 INFO L225 Difference]: With dead ends: 4940 [2020-12-22 06:13:48,955 INFO L226 Difference]: Without dead ends: 2481 [2020-12-22 06:13:48,962 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 06:13:48,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2481 states. [2020-12-22 06:13:49,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2481 to 2481. [2020-12-22 06:13:49,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2481 states. [2020-12-22 06:13:49,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2481 states to 2481 states and 4665 transitions. [2020-12-22 06:13:49,070 INFO L78 Accepts]: Start accepts. Automaton has 2481 states and 4665 transitions. Word has length 48 [2020-12-22 06:13:49,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:13:49,070 INFO L481 AbstractCegarLoop]: Abstraction has 2481 states and 4665 transitions. [2020-12-22 06:13:49,070 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:13:49,070 INFO L276 IsEmpty]: Start isEmpty. Operand 2481 states and 4665 transitions. [2020-12-22 06:13:49,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-22 06:13:49,073 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:13:49,073 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] [2020-12-22 06:13:49,073 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 06:13:49,073 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 06:13:49,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:13:49,074 INFO L82 PathProgramCache]: Analyzing trace with hash 602606381, now seen corresponding path program 1 times [2020-12-22 06:13:49,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:13:49,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448959830] [2020-12-22 06:13:49,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:13:49,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:13:49,163 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 06:13:49,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448959830] [2020-12-22 06:13:49,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:13:49,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:13:49,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922915416] [2020-12-22 06:13:49,165 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:13:49,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:13:49,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:13:49,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:13:49,166 INFO L87 Difference]: Start difference. First operand 2481 states and 4665 transitions. Second operand 4 states. [2020-12-22 06:13:49,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:13:49,324 INFO L93 Difference]: Finished difference Result 4940 states and 9306 transitions. [2020-12-22 06:13:49,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:13:49,325 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 49 [2020-12-22 06:13:49,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:13:49,340 INFO L225 Difference]: With dead ends: 4940 [2020-12-22 06:13:49,340 INFO L226 Difference]: Without dead ends: 2481 [2020-12-22 06:13:49,345 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 06:13:49,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2481 states. [2020-12-22 06:13:49,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2481 to 2481. [2020-12-22 06:13:49,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2481 states. [2020-12-22 06:13:49,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2481 states to 2481 states and 4664 transitions. [2020-12-22 06:13:49,447 INFO L78 Accepts]: Start accepts. Automaton has 2481 states and 4664 transitions. Word has length 49 [2020-12-22 06:13:49,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:13:49,448 INFO L481 AbstractCegarLoop]: Abstraction has 2481 states and 4664 transitions. [2020-12-22 06:13:49,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:13:49,448 INFO L276 IsEmpty]: Start isEmpty. Operand 2481 states and 4664 transitions. [2020-12-22 06:13:49,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-22 06:13:49,450 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:13:49,450 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 06:13:49,451 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 06:13:49,451 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 06:13:49,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:13:49,451 INFO L82 PathProgramCache]: Analyzing trace with hash 2113423090, now seen corresponding path program 1 times [2020-12-22 06:13:49,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:13:49,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284887412] [2020-12-22 06:13:49,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:13:49,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:13:49,572 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 06:13:49,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284887412] [2020-12-22 06:13:49,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:13:49,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 06:13:49,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814247773] [2020-12-22 06:13:49,579 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 06:13:49,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:13:49,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 06:13:49,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 06:13:49,582 INFO L87 Difference]: Start difference. First operand 2481 states and 4664 transitions. Second operand 7 states. [2020-12-22 06:13:49,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:13:49,895 INFO L93 Difference]: Finished difference Result 4934 states and 9294 transitions. [2020-12-22 06:13:49,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 06:13:49,895 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 50 [2020-12-22 06:13:49,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:13:49,930 INFO L225 Difference]: With dead ends: 4934 [2020-12-22 06:13:49,931 INFO L226 Difference]: Without dead ends: 2481 [2020-12-22 06:13:49,940 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 06:13:49,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2481 states. [2020-12-22 06:13:50,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2481 to 2481. [2020-12-22 06:13:50,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2481 states. [2020-12-22 06:13:50,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2481 states to 2481 states and 4663 transitions. [2020-12-22 06:13:50,037 INFO L78 Accepts]: Start accepts. Automaton has 2481 states and 4663 transitions. Word has length 50 [2020-12-22 06:13:50,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:13:50,038 INFO L481 AbstractCegarLoop]: Abstraction has 2481 states and 4663 transitions. [2020-12-22 06:13:50,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 06:13:50,038 INFO L276 IsEmpty]: Start isEmpty. Operand 2481 states and 4663 transitions. [2020-12-22 06:13:50,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-22 06:13:50,040 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:13:50,040 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 06:13:50,040 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 06:13:50,040 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 06:13:50,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:13:50,041 INFO L82 PathProgramCache]: Analyzing trace with hash -976794846, now seen corresponding path program 1 times [2020-12-22 06:13:50,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:13:50,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724918664] [2020-12-22 06:13:50,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:13:50,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:13:50,123 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 06:13:50,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724918664] [2020-12-22 06:13:50,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:13:50,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:13:50,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842077715] [2020-12-22 06:13:50,124 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:13:50,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:13:50,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:13:50,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:13:50,125 INFO L87 Difference]: Start difference. First operand 2481 states and 4663 transitions. Second operand 5 states. [2020-12-22 06:13:51,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:13:51,842 INFO L93 Difference]: Finished difference Result 9971 states and 18731 transitions. [2020-12-22 06:13:51,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 06:13:51,842 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 51 [2020-12-22 06:13:51,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:13:51,866 INFO L225 Difference]: With dead ends: 9971 [2020-12-22 06:13:51,866 INFO L226 Difference]: Without dead ends: 7533 [2020-12-22 06:13:51,874 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 06:13:51,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7533 states. [2020-12-22 06:13:52,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7533 to 2485. [2020-12-22 06:13:52,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2485 states. [2020-12-22 06:13:52,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2485 states to 2485 states and 4667 transitions. [2020-12-22 06:13:52,098 INFO L78 Accepts]: Start accepts. Automaton has 2485 states and 4667 transitions. Word has length 51 [2020-12-22 06:13:52,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:13:52,099 INFO L481 AbstractCegarLoop]: Abstraction has 2485 states and 4667 transitions. [2020-12-22 06:13:52,099 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:13:52,099 INFO L276 IsEmpty]: Start isEmpty. Operand 2485 states and 4667 transitions. [2020-12-22 06:13:52,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 06:13:52,101 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:13:52,101 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 06:13:52,101 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 06:13:52,101 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 06:13:52,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:13:52,102 INFO L82 PathProgramCache]: Analyzing trace with hash 559828842, now seen corresponding path program 1 times [2020-12-22 06:13:52,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:13:52,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620100590] [2020-12-22 06:13:52,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:13:52,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:13:52,198 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 06:13:52,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620100590] [2020-12-22 06:13:52,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:13:52,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:13:52,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760276996] [2020-12-22 06:13:52,200 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:13:52,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:13:52,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:13:52,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:13:52,201 INFO L87 Difference]: Start difference. First operand 2485 states and 4667 transitions. Second operand 4 states. [2020-12-22 06:13:54,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:13:54,344 INFO L93 Difference]: Finished difference Result 6359 states and 11960 transitions. [2020-12-22 06:13:54,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:13:54,345 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 52 [2020-12-22 06:13:54,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:13:54,355 INFO L225 Difference]: With dead ends: 6359 [2020-12-22 06:13:54,356 INFO L226 Difference]: Without dead ends: 3910 [2020-12-22 06:13:54,360 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 06:13:54,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3910 states. [2020-12-22 06:13:54,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3910 to 3480. [2020-12-22 06:13:54,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3480 states. [2020-12-22 06:13:54,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3480 states to 3480 states and 6543 transitions. [2020-12-22 06:13:54,526 INFO L78 Accepts]: Start accepts. Automaton has 3480 states and 6543 transitions. Word has length 52 [2020-12-22 06:13:54,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:13:54,526 INFO L481 AbstractCegarLoop]: Abstraction has 3480 states and 6543 transitions. [2020-12-22 06:13:54,526 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:13:54,526 INFO L276 IsEmpty]: Start isEmpty. Operand 3480 states and 6543 transitions. [2020-12-22 06:13:54,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-22 06:13:54,528 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:13:54,529 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 06:13:54,529 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 06:13:54,529 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 06:13:54,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:13:54,530 INFO L82 PathProgramCache]: Analyzing trace with hash -845589209, now seen corresponding path program 1 times [2020-12-22 06:13:54,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:13:54,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284025125] [2020-12-22 06:13:54,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:13:54,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:13:54,603 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 06:13:54,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284025125] [2020-12-22 06:13:54,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:13:54,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:13:54,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409587798] [2020-12-22 06:13:54,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:13:54,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:13:54,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:13:54,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:13:54,606 INFO L87 Difference]: Start difference. First operand 3480 states and 6543 transitions. Second operand 4 states. [2020-12-22 06:13:56,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:13:56,411 INFO L93 Difference]: Finished difference Result 7354 states and 13835 transitions. [2020-12-22 06:13:56,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:13:56,412 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 53 [2020-12-22 06:13:56,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:13:56,424 INFO L225 Difference]: With dead ends: 7354 [2020-12-22 06:13:56,424 INFO L226 Difference]: Without dead ends: 3910 [2020-12-22 06:13:56,431 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 06:13:56,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3910 states. [2020-12-22 06:13:56,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3910 to 3480. [2020-12-22 06:13:56,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3480 states. [2020-12-22 06:13:56,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3480 states to 3480 states and 6541 transitions. [2020-12-22 06:13:56,604 INFO L78 Accepts]: Start accepts. Automaton has 3480 states and 6541 transitions. Word has length 53 [2020-12-22 06:13:56,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:13:56,605 INFO L481 AbstractCegarLoop]: Abstraction has 3480 states and 6541 transitions. [2020-12-22 06:13:56,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:13:56,605 INFO L276 IsEmpty]: Start isEmpty. Operand 3480 states and 6541 transitions. [2020-12-22 06:13:56,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 06:13:56,608 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:13:56,608 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 06:13:56,608 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 06:13:56,608 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 06:13:56,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:13:56,609 INFO L82 PathProgramCache]: Analyzing trace with hash -679920574, now seen corresponding path program 1 times [2020-12-22 06:13:56,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:13:56,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182986989] [2020-12-22 06:13:56,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:13:56,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:13:56,703 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 06:13:56,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182986989] [2020-12-22 06:13:56,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:13:56,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:13:56,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300860738] [2020-12-22 06:13:56,705 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:13:56,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:13:56,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:13:56,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:13:56,706 INFO L87 Difference]: Start difference. First operand 3480 states and 6541 transitions. Second operand 5 states. [2020-12-22 06:13:57,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:13:57,946 INFO L93 Difference]: Finished difference Result 26388 states and 49786 transitions. [2020-12-22 06:13:57,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 06:13:57,946 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 54 [2020-12-22 06:13:57,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:13:58,006 INFO L225 Difference]: With dead ends: 26388 [2020-12-22 06:13:58,007 INFO L226 Difference]: Without dead ends: 22953 [2020-12-22 06:13:58,017 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 06:13:58,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22953 states. [2020-12-22 06:13:58,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22953 to 6258. [2020-12-22 06:13:58,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6258 states. [2020-12-22 06:13:58,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6258 states to 6258 states and 11784 transitions. [2020-12-22 06:13:58,420 INFO L78 Accepts]: Start accepts. Automaton has 6258 states and 11784 transitions. Word has length 54 [2020-12-22 06:13:58,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:13:58,420 INFO L481 AbstractCegarLoop]: Abstraction has 6258 states and 11784 transitions. [2020-12-22 06:13:58,421 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:13:58,421 INFO L276 IsEmpty]: Start isEmpty. Operand 6258 states and 11784 transitions. [2020-12-22 06:13:58,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 06:13:58,423 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:13:58,423 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 06:13:58,423 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 06:13:58,424 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 06:13:58,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:13:58,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1809608388, now seen corresponding path program 1 times [2020-12-22 06:13:58,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:13:58,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368314511] [2020-12-22 06:13:58,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:13:58,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:13:58,497 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 06:13:58,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368314511] [2020-12-22 06:13:58,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:13:58,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:13:58,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565990170] [2020-12-22 06:13:58,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:13:58,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:13:58,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:13:58,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:13:58,500 INFO L87 Difference]: Start difference. First operand 6258 states and 11784 transitions. Second operand 4 states. [2020-12-22 06:13:59,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:13:59,051 INFO L93 Difference]: Finished difference Result 11052 states and 20720 transitions. [2020-12-22 06:13:59,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 06:13:59,054 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 54 [2020-12-22 06:13:59,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:13:59,079 INFO L225 Difference]: With dead ends: 11052 [2020-12-22 06:13:59,080 INFO L226 Difference]: Without dead ends: 8547 [2020-12-22 06:13:59,087 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 06:13:59,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8547 states. [2020-12-22 06:13:59,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8547 to 6264. [2020-12-22 06:13:59,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6264 states. [2020-12-22 06:13:59,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6264 states to 6264 states and 11790 transitions. [2020-12-22 06:13:59,418 INFO L78 Accepts]: Start accepts. Automaton has 6264 states and 11790 transitions. Word has length 54 [2020-12-22 06:13:59,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:13:59,419 INFO L481 AbstractCegarLoop]: Abstraction has 6264 states and 11790 transitions. [2020-12-22 06:13:59,419 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:13:59,419 INFO L276 IsEmpty]: Start isEmpty. Operand 6264 states and 11790 transitions. [2020-12-22 06:13:59,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-22 06:13:59,421 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:13:59,422 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 06:13:59,422 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 06:13:59,422 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 06:13:59,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:13:59,423 INFO L82 PathProgramCache]: Analyzing trace with hash -385500241, now seen corresponding path program 1 times [2020-12-22 06:13:59,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:13:59,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360608547] [2020-12-22 06:13:59,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:13:59,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:13:59,504 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 06:13:59,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360608547] [2020-12-22 06:13:59,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:13:59,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 06:13:59,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117779136] [2020-12-22 06:13:59,506 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:13:59,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:13:59,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:13:59,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:13:59,510 INFO L87 Difference]: Start difference. First operand 6264 states and 11790 transitions. Second operand 3 states. [2020-12-22 06:14:00,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:14:00,169 INFO L93 Difference]: Finished difference Result 9181 states and 17246 transitions. [2020-12-22 06:14:00,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:14:00,169 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 59 [2020-12-22 06:14:00,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:14:00,189 INFO L225 Difference]: With dead ends: 9181 [2020-12-22 06:14:00,189 INFO L226 Difference]: Without dead ends: 6409 [2020-12-22 06:14:00,197 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:14:00,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6409 states. [2020-12-22 06:14:00,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6409 to 6376. [2020-12-22 06:14:00,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6376 states. [2020-12-22 06:14:00,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6376 states to 6376 states and 11921 transitions. [2020-12-22 06:14:00,496 INFO L78 Accepts]: Start accepts. Automaton has 6376 states and 11921 transitions. Word has length 59 [2020-12-22 06:14:00,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:14:00,496 INFO L481 AbstractCegarLoop]: Abstraction has 6376 states and 11921 transitions. [2020-12-22 06:14:00,496 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:14:00,496 INFO L276 IsEmpty]: Start isEmpty. Operand 6376 states and 11921 transitions. [2020-12-22 06:14:00,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-22 06:14:00,498 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:14:00,498 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] [2020-12-22 06:14:00,499 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 06:14:00,499 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:14:00,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:14:00,500 INFO L82 PathProgramCache]: Analyzing trace with hash 2099712773, now seen corresponding path program 1 times [2020-12-22 06:14:00,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:14:00,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954423793] [2020-12-22 06:14:00,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:14:00,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:14:00,635 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 06:14:00,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954423793] [2020-12-22 06:14:00,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:14:00,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:14:00,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839885591] [2020-12-22 06:14:00,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:14:00,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:14:00,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:14:00,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:14:00,637 INFO L87 Difference]: Start difference. First operand 6376 states and 11921 transitions. Second operand 4 states. [2020-12-22 06:14:01,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:14:01,642 INFO L93 Difference]: Finished difference Result 13935 states and 26048 transitions. [2020-12-22 06:14:01,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:14:01,642 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 60 [2020-12-22 06:14:01,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:14:01,664 INFO L225 Difference]: With dead ends: 13935 [2020-12-22 06:14:01,665 INFO L226 Difference]: Without dead ends: 11230 [2020-12-22 06:14:01,671 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 06:14:01,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11230 states. [2020-12-22 06:14:02,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11230 to 8972. [2020-12-22 06:14:02,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8972 states. [2020-12-22 06:14:02,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8972 states to 8972 states and 16783 transitions. [2020-12-22 06:14:02,127 INFO L78 Accepts]: Start accepts. Automaton has 8972 states and 16783 transitions. Word has length 60 [2020-12-22 06:14:02,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:14:02,127 INFO L481 AbstractCegarLoop]: Abstraction has 8972 states and 16783 transitions. [2020-12-22 06:14:02,127 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:14:02,127 INFO L276 IsEmpty]: Start isEmpty. Operand 8972 states and 16783 transitions. [2020-12-22 06:14:02,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-22 06:14:02,130 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:14:02,130 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] [2020-12-22 06:14:02,130 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 06:14:02,130 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:14:02,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:14:02,131 INFO L82 PathProgramCache]: Analyzing trace with hash 1282064323, now seen corresponding path program 1 times [2020-12-22 06:14:02,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:14:02,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165574880] [2020-12-22 06:14:02,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:14:02,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:14:02,219 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 06:14:02,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165574880] [2020-12-22 06:14:02,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:14:02,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:14:02,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353527252] [2020-12-22 06:14:02,221 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 06:14:02,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:14:02,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 06:14:02,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-12-22 06:14:02,222 INFO L87 Difference]: Start difference. First operand 8972 states and 16783 transitions. Second operand 6 states. [2020-12-22 06:14:03,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:14:03,620 INFO L93 Difference]: Finished difference Result 40132 states and 75178 transitions. [2020-12-22 06:14:03,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 06:14:03,620 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 60 [2020-12-22 06:14:03,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:14:03,676 INFO L225 Difference]: With dead ends: 40132 [2020-12-22 06:14:03,676 INFO L226 Difference]: Without dead ends: 31364 [2020-12-22 06:14:03,696 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 06:14:03,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31364 states. [2020-12-22 06:14:04,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31364 to 24301. [2020-12-22 06:14:04,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24301 states. [2020-12-22 06:14:04,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24301 states to 24301 states and 45420 transitions. [2020-12-22 06:14:04,858 INFO L78 Accepts]: Start accepts. Automaton has 24301 states and 45420 transitions. Word has length 60 [2020-12-22 06:14:04,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:14:04,858 INFO L481 AbstractCegarLoop]: Abstraction has 24301 states and 45420 transitions. [2020-12-22 06:14:04,858 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 06:14:04,858 INFO L276 IsEmpty]: Start isEmpty. Operand 24301 states and 45420 transitions. [2020-12-22 06:14:04,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-22 06:14:04,861 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:14:04,861 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 06:14:04,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 06:14:04,861 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:14:04,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:14:04,862 INFO L82 PathProgramCache]: Analyzing trace with hash -436846510, now seen corresponding path program 1 times [2020-12-22 06:14:04,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:14:04,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242238086] [2020-12-22 06:14:04,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:14:04,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:14:04,964 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 06:14:04,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242238086] [2020-12-22 06:14:04,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:14:04,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:14:04,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250127177] [2020-12-22 06:14:04,966 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 06:14:04,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:14:04,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 06:14:04,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-12-22 06:14:04,967 INFO L87 Difference]: Start difference. First operand 24301 states and 45420 transitions. Second operand 6 states. [2020-12-22 06:14:08,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:14:08,346 INFO L93 Difference]: Finished difference Result 113545 states and 212240 transitions. [2020-12-22 06:14:08,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 06:14:08,347 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 61 [2020-12-22 06:14:08,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:14:08,502 INFO L225 Difference]: With dead ends: 113545 [2020-12-22 06:14:08,502 INFO L226 Difference]: Without dead ends: 89449 [2020-12-22 06:14:08,536 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 06:14:08,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89449 states. [2020-12-22 06:14:11,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89449 to 68614. [2020-12-22 06:14:11,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68614 states. [2020-12-22 06:14:11,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68614 states to 68614 states and 128033 transitions. [2020-12-22 06:14:11,654 INFO L78 Accepts]: Start accepts. Automaton has 68614 states and 128033 transitions. Word has length 61 [2020-12-22 06:14:11,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:14:11,654 INFO L481 AbstractCegarLoop]: Abstraction has 68614 states and 128033 transitions. [2020-12-22 06:14:11,654 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 06:14:11,655 INFO L276 IsEmpty]: Start isEmpty. Operand 68614 states and 128033 transitions. [2020-12-22 06:14:11,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-22 06:14:11,657 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:14:11,657 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] [2020-12-22 06:14:11,657 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 06:14:11,658 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:14:11,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:14:11,658 INFO L82 PathProgramCache]: Analyzing trace with hash 1664154792, now seen corresponding path program 1 times [2020-12-22 06:14:11,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:14:11,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789258766] [2020-12-22 06:14:11,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:14:11,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:14:11,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:14:11,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789258766] [2020-12-22 06:14:11,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:14:11,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:14:11,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735026731] [2020-12-22 06:14:11,934 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 06:14:11,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:14:11,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 06:14:11,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-12-22 06:14:11,940 INFO L87 Difference]: Start difference. First operand 68614 states and 128033 transitions. Second operand 6 states. [2020-12-22 06:14:21,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:14:21,312 INFO L93 Difference]: Finished difference Result 328538 states and 612900 transitions. [2020-12-22 06:14:21,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 06:14:21,313 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 62 [2020-12-22 06:14:21,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:14:21,938 INFO L225 Difference]: With dead ends: 328538 [2020-12-22 06:14:21,938 INFO L226 Difference]: Without dead ends: 260130 [2020-12-22 06:14:22,054 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 06:14:22,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260130 states. [2020-12-22 06:14:30,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260130 to 198255. [2020-12-22 06:14:30,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198255 states. [2020-12-22 06:14:31,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198255 states to 198255 states and 369354 transitions. [2020-12-22 06:14:31,561 INFO L78 Accepts]: Start accepts. Automaton has 198255 states and 369354 transitions. Word has length 62 [2020-12-22 06:14:31,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:14:31,562 INFO L481 AbstractCegarLoop]: Abstraction has 198255 states and 369354 transitions. [2020-12-22 06:14:31,562 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 06:14:31,562 INFO L276 IsEmpty]: Start isEmpty. Operand 198255 states and 369354 transitions. [2020-12-22 06:14:31,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 06:14:31,564 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:14:31,564 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 06:14:31,564 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 06:14:31,564 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 06:14:31,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:14:31,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1923347991, now seen corresponding path program 1 times [2020-12-22 06:14:31,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:14:31,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217640578] [2020-12-22 06:14:31,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:14:31,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:14:31,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:14:31,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217640578] [2020-12-22 06:14:31,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:14:31,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:14:31,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120103460] [2020-12-22 06:14:31,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 06:14:31,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:14:31,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 06:14:31,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-12-22 06:14:31,695 INFO L87 Difference]: Start difference. First operand 198255 states and 369354 transitions. Second operand 6 states. [2020-12-22 06:14:57,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:14:57,494 INFO L93 Difference]: Finished difference Result 962971 states and 1793674 transitions. [2020-12-22 06:14:57,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 06:14:57,495 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 63 [2020-12-22 06:14:57,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:14:59,892 INFO L225 Difference]: With dead ends: 962971 [2020-12-22 06:14:59,892 INFO L226 Difference]: Without dead ends: 764923 [2020-12-22 06:15:00,227 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 06:15:00,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764923 states. [2020-12-22 06:15:27,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764923 to 580576. [2020-12-22 06:15:27,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 580576 states. [2020-12-22 06:15:30,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580576 states to 580576 states and 1080241 transitions. [2020-12-22 06:15:30,120 INFO L78 Accepts]: Start accepts. Automaton has 580576 states and 1080241 transitions. Word has length 63 [2020-12-22 06:15:30,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:15:30,120 INFO L481 AbstractCegarLoop]: Abstraction has 580576 states and 1080241 transitions. [2020-12-22 06:15:30,120 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 06:15:30,120 INFO L276 IsEmpty]: Start isEmpty. Operand 580576 states and 1080241 transitions. [2020-12-22 06:15:30,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 06:15:30,122 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:15:30,122 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] [2020-12-22 06:15:30,122 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 06:15:30,123 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 06:15:30,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:15:30,123 INFO L82 PathProgramCache]: Analyzing trace with hash 921064845, now seen corresponding path program 1 times [2020-12-22 06:15:30,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:15:30,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978819530] [2020-12-22 06:15:30,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:15:30,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:15:30,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:15:30,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978819530] [2020-12-22 06:15:30,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:15:30,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:15:30,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639593330] [2020-12-22 06:15:30,921 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 06:15:30,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:15:30,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 06:15:30,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-12-22 06:15:30,923 INFO L87 Difference]: Start difference. First operand 580576 states and 1080241 transitions. Second operand 6 states.