/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/combinations/pals_lcr.3.ufo.UNBOUNDED.pals+Problem12_label03.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 09:37:23,958 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 09:37:23,963 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 09:37:24,041 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 09:37:24,042 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 09:37:24,047 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 09:37:24,052 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 09:37:24,061 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 09:37:24,066 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 09:37:24,073 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 09:37:24,075 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 09:37:24,077 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 09:37:24,078 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 09:37:24,082 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 09:37:24,085 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 09:37:24,088 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 09:37:24,090 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 09:37:24,094 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 09:37:24,116 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 09:37:24,118 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 09:37:24,120 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 09:37:24,127 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 09:37:24,129 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 09:37:24,134 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 09:37:24,141 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 09:37:24,161 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 09:37:24,163 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 09:37:24,165 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 09:37:24,166 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 09:37:24,233 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 09:37:24,234 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 09:37:24,241 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 09:37:24,241 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 09:37:24,241 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 09:37:24,242 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 09:37:24,242 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 09:37:24,242 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 09:37:24,242 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 09:37:24,243 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 09:37:24,245 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 09:37:24,245 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 09:37:24,245 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 09:37:24,245 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 09:37:24,246 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 09:37:24,246 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 09:37:24,246 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 09:37:24,246 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:37:24,247 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 09:37:24,247 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 09:37:24,248 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 09:37:24,248 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 09:37:24,248 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 09:37:24,248 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 09:37:24,249 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 09:37:24,249 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 09:37:24,721 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 09:37:24,766 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 09:37:24,771 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 09:37:24,773 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 09:37:24,774 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 09:37:24,776 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.3.ufo.UNBOUNDED.pals+Problem12_label03.c [2020-12-22 09:37:24,898 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e810fac2a/90a49e063d5f4d0781869cc905e4da9f/FLAG16c4727c2 [2020-12-22 09:37:25,968 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 09:37:25,969 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.3.ufo.UNBOUNDED.pals+Problem12_label03.c [2020-12-22 09:37:26,011 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e810fac2a/90a49e063d5f4d0781869cc905e4da9f/FLAG16c4727c2 [2020-12-22 09:37:26,405 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e810fac2a/90a49e063d5f4d0781869cc905e4da9f [2020-12-22 09:37:26,409 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 09:37:26,414 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 09:37:26,420 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 09:37:26,420 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 09:37:26,425 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 09:37:26,426 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:37:26" (1/1) ... [2020-12-22 09:37:26,429 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@506d24ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:37:26, skipping insertion in model container [2020-12-22 09:37:26,429 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:37:26" (1/1) ... [2020-12-22 09:37:26,440 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 09:37:26,682 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 09:37:27,073 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/combinations/pals_lcr.3.ufo.UNBOUNDED.pals+Problem12_label03.c[6508,6521] [2020-12-22 09:37:27,159 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/combinations/pals_lcr.3.ufo.UNBOUNDED.pals+Problem12_label03.c[8602,8615] [2020-12-22 09:37:28,522 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:37:28,554 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 09:37:28,586 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/combinations/pals_lcr.3.ufo.UNBOUNDED.pals+Problem12_label03.c[6508,6521] [2020-12-22 09:37:28,592 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/combinations/pals_lcr.3.ufo.UNBOUNDED.pals+Problem12_label03.c[8602,8615] [2020-12-22 09:37:29,283 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:37:29,348 INFO L208 MainTranslator]: Completed translation [2020-12-22 09:37:29,349 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:37:29 WrapperNode [2020-12-22 09:37:29,350 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 09:37:29,352 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 09:37:29,353 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 09:37:29,353 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 09:37:29,364 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:37:29" (1/1) ... [2020-12-22 09:37:29,493 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:37:29" (1/1) ... [2020-12-22 09:37:30,014 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 09:37:30,015 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 09:37:30,015 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 09:37:30,016 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 09:37:30,027 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:37:29" (1/1) ... [2020-12-22 09:37:30,027 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:37:29" (1/1) ... [2020-12-22 09:37:30,118 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:37:29" (1/1) ... [2020-12-22 09:37:30,119 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:37:29" (1/1) ... [2020-12-22 09:37:30,581 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:37:29" (1/1) ... [2020-12-22 09:37:30,648 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:37:29" (1/1) ... [2020-12-22 09:37:30,793 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:37:29" (1/1) ... [2020-12-22 09:37:30,973 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 09:37:30,975 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 09:37:30,975 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 09:37:30,976 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 09:37:30,977 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:37:29" (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 09:37:31,117 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 09:37:31,118 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 09:37:31,118 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 09:37:31,119 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 09:37:37,614 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 09:37:37,615 INFO L299 CfgBuilder]: Removed 32 assume(true) statements. [2020-12-22 09:37:37,622 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:37:37 BoogieIcfgContainer [2020-12-22 09:37:37,623 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 09:37:37,627 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 09:37:37,630 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 09:37:37,635 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 09:37:37,636 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:37:26" (1/3) ... [2020-12-22 09:37:37,638 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3749b732 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:37:37, skipping insertion in model container [2020-12-22 09:37:37,638 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:37:29" (2/3) ... [2020-12-22 09:37:37,639 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3749b732 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:37:37, skipping insertion in model container [2020-12-22 09:37:37,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:37:37" (3/3) ... [2020-12-22 09:37:37,642 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.ufo.UNBOUNDED.pals+Problem12_label03.c [2020-12-22 09:37:37,653 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 09:37:37,661 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 09:37:37,688 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 09:37:37,748 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 09:37:37,754 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 09:37:37,754 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 09:37:37,754 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 09:37:37,754 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 09:37:37,755 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 09:37:37,755 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 09:37:37,755 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 09:37:37,804 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states. [2020-12-22 09:37:37,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-22 09:37:37,816 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:37:37,818 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] [2020-12-22 09:37:37,819 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:37:37,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:37:37,827 INFO L82 PathProgramCache]: Analyzing trace with hash -1045403899, now seen corresponding path program 1 times [2020-12-22 09:37:37,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:37:37,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78689838] [2020-12-22 09:37:37,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:37:38,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:38,262 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 09:37:38,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78689838] [2020-12-22 09:37:38,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:37:38,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:37:38,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747204574] [2020-12-22 09:37:38,272 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:37:38,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:37:38,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:37:38,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:37:38,300 INFO L87 Difference]: Start difference. First operand 879 states. Second operand 3 states. [2020-12-22 09:37:45,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:37:45,775 INFO L93 Difference]: Finished difference Result 2489 states and 4796 transitions. [2020-12-22 09:37:45,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:37:45,778 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-12-22 09:37:45,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:37:45,819 INFO L225 Difference]: With dead ends: 2489 [2020-12-22 09:37:45,820 INFO L226 Difference]: Without dead ends: 1564 [2020-12-22 09:37:45,829 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 09:37:45,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1564 states. [2020-12-22 09:37:45,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1564 to 1564. [2020-12-22 09:37:45,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1564 states. [2020-12-22 09:37:46,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1564 states to 1564 states and 2562 transitions. [2020-12-22 09:37:46,010 INFO L78 Accepts]: Start accepts. Automaton has 1564 states and 2562 transitions. Word has length 20 [2020-12-22 09:37:46,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:37:46,010 INFO L481 AbstractCegarLoop]: Abstraction has 1564 states and 2562 transitions. [2020-12-22 09:37:46,010 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:37:46,011 INFO L276 IsEmpty]: Start isEmpty. Operand 1564 states and 2562 transitions. [2020-12-22 09:37:46,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 09:37:46,013 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:37:46,013 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:37:46,013 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 09:37:46,014 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:37:46,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:37:46,015 INFO L82 PathProgramCache]: Analyzing trace with hash 783737522, now seen corresponding path program 1 times [2020-12-22 09:37:46,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:37:46,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527184202] [2020-12-22 09:37:46,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:37:46,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:46,152 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 09:37:46,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527184202] [2020-12-22 09:37:46,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:37:46,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:37:46,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650436206] [2020-12-22 09:37:46,156 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:37:46,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:37:46,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:37:46,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:37:46,158 INFO L87 Difference]: Start difference. First operand 1564 states and 2562 transitions. Second operand 5 states. [2020-12-22 09:37:46,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:37:46,269 INFO L93 Difference]: Finished difference Result 1605 states and 2624 transitions. [2020-12-22 09:37:46,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:37:46,270 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2020-12-22 09:37:46,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:37:46,282 INFO L225 Difference]: With dead ends: 1605 [2020-12-22 09:37:46,282 INFO L226 Difference]: Without dead ends: 1564 [2020-12-22 09:37:46,285 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:37:46,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1564 states. [2020-12-22 09:37:46,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1564 to 1564. [2020-12-22 09:37:46,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1564 states. [2020-12-22 09:37:46,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1564 states to 1564 states and 2546 transitions. [2020-12-22 09:37:46,345 INFO L78 Accepts]: Start accepts. Automaton has 1564 states and 2546 transitions. Word has length 26 [2020-12-22 09:37:46,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:37:46,345 INFO L481 AbstractCegarLoop]: Abstraction has 1564 states and 2546 transitions. [2020-12-22 09:37:46,345 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:37:46,346 INFO L276 IsEmpty]: Start isEmpty. Operand 1564 states and 2546 transitions. [2020-12-22 09:37:46,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-22 09:37:46,348 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:37:46,348 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] [2020-12-22 09:37:46,348 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 09:37:46,349 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:37:46,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:37:46,350 INFO L82 PathProgramCache]: Analyzing trace with hash -698732182, now seen corresponding path program 1 times [2020-12-22 09:37:46,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:37:46,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230717054] [2020-12-22 09:37:46,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:37:46,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:46,450 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 09:37:46,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230717054] [2020-12-22 09:37:46,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:37:46,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:37:46,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891479749] [2020-12-22 09:37:46,452 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:37:46,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:37:46,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:37:46,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:37:46,455 INFO L87 Difference]: Start difference. First operand 1564 states and 2546 transitions. Second operand 3 states. [2020-12-22 09:37:46,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:37:46,512 INFO L93 Difference]: Finished difference Result 1632 states and 2652 transitions. [2020-12-22 09:37:46,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:37:46,513 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 41 [2020-12-22 09:37:46,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:37:46,527 INFO L225 Difference]: With dead ends: 1632 [2020-12-22 09:37:46,527 INFO L226 Difference]: Without dead ends: 1595 [2020-12-22 09:37:46,529 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 09:37:46,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1595 states. [2020-12-22 09:37:46,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1595 to 1593. [2020-12-22 09:37:46,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1593 states. [2020-12-22 09:37:46,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1593 states to 1593 states and 2592 transitions. [2020-12-22 09:37:46,592 INFO L78 Accepts]: Start accepts. Automaton has 1593 states and 2592 transitions. Word has length 41 [2020-12-22 09:37:46,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:37:46,593 INFO L481 AbstractCegarLoop]: Abstraction has 1593 states and 2592 transitions. [2020-12-22 09:37:46,593 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:37:46,593 INFO L276 IsEmpty]: Start isEmpty. Operand 1593 states and 2592 transitions. [2020-12-22 09:37:46,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-22 09:37:46,595 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:37:46,596 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] [2020-12-22 09:37:46,596 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 09:37:46,596 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:37:46,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:37:46,597 INFO L82 PathProgramCache]: Analyzing trace with hash -360939040, now seen corresponding path program 1 times [2020-12-22 09:37:46,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:37:46,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053973233] [2020-12-22 09:37:46,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:37:46,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:46,677 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 09:37:46,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053973233] [2020-12-22 09:37:46,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:37:46,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:37:46,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703443995] [2020-12-22 09:37:46,679 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:37:46,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:37:46,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:37:46,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:37:46,681 INFO L87 Difference]: Start difference. First operand 1593 states and 2592 transitions. Second operand 3 states. [2020-12-22 09:37:46,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:37:46,745 INFO L93 Difference]: Finished difference Result 1713 states and 2780 transitions. [2020-12-22 09:37:46,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:37:46,746 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 41 [2020-12-22 09:37:46,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:37:46,759 INFO L225 Difference]: With dead ends: 1713 [2020-12-22 09:37:46,759 INFO L226 Difference]: Without dead ends: 1647 [2020-12-22 09:37:46,761 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 09:37:46,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1647 states. [2020-12-22 09:37:46,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1647 to 1645. [2020-12-22 09:37:46,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1645 states. [2020-12-22 09:37:46,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1645 states to 1645 states and 2673 transitions. [2020-12-22 09:37:46,832 INFO L78 Accepts]: Start accepts. Automaton has 1645 states and 2673 transitions. Word has length 41 [2020-12-22 09:37:46,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:37:46,832 INFO L481 AbstractCegarLoop]: Abstraction has 1645 states and 2673 transitions. [2020-12-22 09:37:46,832 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:37:46,833 INFO L276 IsEmpty]: Start isEmpty. Operand 1645 states and 2673 transitions. [2020-12-22 09:37:46,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-22 09:37:46,840 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:37:46,840 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] [2020-12-22 09:37:46,840 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 09:37:46,841 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:37:46,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:37:46,841 INFO L82 PathProgramCache]: Analyzing trace with hash 857046358, now seen corresponding path program 1 times [2020-12-22 09:37:46,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:37:46,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194402085] [2020-12-22 09:37:46,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:37:46,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:47,020 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 09:37:47,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194402085] [2020-12-22 09:37:47,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:37:47,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:37:47,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777990488] [2020-12-22 09:37:47,022 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:37:47,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:37:47,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:37:47,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:37:47,024 INFO L87 Difference]: Start difference. First operand 1645 states and 2673 transitions. Second operand 5 states. [2020-12-22 09:37:47,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:37:47,225 INFO L93 Difference]: Finished difference Result 2353 states and 3783 transitions. [2020-12-22 09:37:47,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:37:47,226 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 41 [2020-12-22 09:37:47,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:37:47,242 INFO L225 Difference]: With dead ends: 2353 [2020-12-22 09:37:47,242 INFO L226 Difference]: Without dead ends: 2235 [2020-12-22 09:37:47,244 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:37:47,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2235 states. [2020-12-22 09:37:47,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2235 to 1761. [2020-12-22 09:37:47,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1761 states. [2020-12-22 09:37:47,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1761 states to 1761 states and 2849 transitions. [2020-12-22 09:37:47,377 INFO L78 Accepts]: Start accepts. Automaton has 1761 states and 2849 transitions. Word has length 41 [2020-12-22 09:37:47,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:37:47,377 INFO L481 AbstractCegarLoop]: Abstraction has 1761 states and 2849 transitions. [2020-12-22 09:37:47,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:37:47,378 INFO L276 IsEmpty]: Start isEmpty. Operand 1761 states and 2849 transitions. [2020-12-22 09:37:47,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 09:37:47,379 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:37:47,379 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:37:47,379 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 09:37:47,380 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:37:47,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:37:47,380 INFO L82 PathProgramCache]: Analyzing trace with hash 1867096070, now seen corresponding path program 1 times [2020-12-22 09:37:47,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:37:47,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021714297] [2020-12-22 09:37:47,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:37:47,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:47,447 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 09:37:47,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021714297] [2020-12-22 09:37:47,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:37:47,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:37:47,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094927853] [2020-12-22 09:37:47,449 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:37:47,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:37:47,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:37:47,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:37:47,451 INFO L87 Difference]: Start difference. First operand 1761 states and 2849 transitions. Second operand 3 states. [2020-12-22 09:37:47,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:37:47,529 INFO L93 Difference]: Finished difference Result 2185 states and 3495 transitions. [2020-12-22 09:37:47,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:37:47,530 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 43 [2020-12-22 09:37:47,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:37:47,544 INFO L225 Difference]: With dead ends: 2185 [2020-12-22 09:37:47,544 INFO L226 Difference]: Without dead ends: 1951 [2020-12-22 09:37:47,546 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 09:37:47,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1951 states. [2020-12-22 09:37:47,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1951 to 1941. [2020-12-22 09:37:47,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1941 states. [2020-12-22 09:37:47,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1941 states to 1941 states and 3105 transitions. [2020-12-22 09:37:47,628 INFO L78 Accepts]: Start accepts. Automaton has 1941 states and 3105 transitions. Word has length 43 [2020-12-22 09:37:47,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:37:47,629 INFO L481 AbstractCegarLoop]: Abstraction has 1941 states and 3105 transitions. [2020-12-22 09:37:47,629 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:37:47,629 INFO L276 IsEmpty]: Start isEmpty. Operand 1941 states and 3105 transitions. [2020-12-22 09:37:47,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 09:37:47,630 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:37:47,630 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:37:47,631 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 09:37:47,631 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:37:47,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:37:47,631 INFO L82 PathProgramCache]: Analyzing trace with hash 1933589582, now seen corresponding path program 1 times [2020-12-22 09:37:47,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:37:47,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475015304] [2020-12-22 09:37:47,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:37:47,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:47,758 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 09:37:47,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475015304] [2020-12-22 09:37:47,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:37:47,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:37:47,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834434319] [2020-12-22 09:37:47,760 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:37:47,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:37:47,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:37:47,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:37:47,762 INFO L87 Difference]: Start difference. First operand 1941 states and 3105 transitions. Second operand 5 states. [2020-12-22 09:37:47,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:37:47,921 INFO L93 Difference]: Finished difference Result 2357 states and 3723 transitions. [2020-12-22 09:37:47,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:37:47,922 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 43 [2020-12-22 09:37:47,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:37:47,935 INFO L225 Difference]: With dead ends: 2357 [2020-12-22 09:37:47,936 INFO L226 Difference]: Without dead ends: 1943 [2020-12-22 09:37:47,938 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:37:47,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1943 states. [2020-12-22 09:37:48,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1943 to 1941. [2020-12-22 09:37:48,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1941 states. [2020-12-22 09:37:48,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1941 states to 1941 states and 3097 transitions. [2020-12-22 09:37:48,027 INFO L78 Accepts]: Start accepts. Automaton has 1941 states and 3097 transitions. Word has length 43 [2020-12-22 09:37:48,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:37:48,029 INFO L481 AbstractCegarLoop]: Abstraction has 1941 states and 3097 transitions. [2020-12-22 09:37:48,029 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:37:48,030 INFO L276 IsEmpty]: Start isEmpty. Operand 1941 states and 3097 transitions. [2020-12-22 09:37:48,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-22 09:37:48,033 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:37:48,033 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 09:37:48,034 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 09:37:48,035 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:37:48,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:37:48,036 INFO L82 PathProgramCache]: Analyzing trace with hash -602988295, now seen corresponding path program 1 times [2020-12-22 09:37:48,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:37:48,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746170086] [2020-12-22 09:37:48,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:37:48,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:48,238 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 09:37:48,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746170086] [2020-12-22 09:37:48,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:37:48,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 09:37:48,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497800745] [2020-12-22 09:37:48,241 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 09:37:48,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:37:48,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 09:37:48,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:37:48,243 INFO L87 Difference]: Start difference. First operand 1941 states and 3097 transitions. Second operand 8 states. [2020-12-22 09:37:48,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:37:48,535 INFO L93 Difference]: Finished difference Result 2267 states and 3561 transitions. [2020-12-22 09:37:48,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 09:37:48,536 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 44 [2020-12-22 09:37:48,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:37:48,552 INFO L225 Difference]: With dead ends: 2267 [2020-12-22 09:37:48,553 INFO L226 Difference]: Without dead ends: 2265 [2020-12-22 09:37:48,555 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 09:37:48,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2265 states. [2020-12-22 09:37:48,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2265 to 1965. [2020-12-22 09:37:48,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1965 states. [2020-12-22 09:37:48,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1965 states to 1965 states and 3117 transitions. [2020-12-22 09:37:48,670 INFO L78 Accepts]: Start accepts. Automaton has 1965 states and 3117 transitions. Word has length 44 [2020-12-22 09:37:48,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:37:48,671 INFO L481 AbstractCegarLoop]: Abstraction has 1965 states and 3117 transitions. [2020-12-22 09:37:48,671 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 09:37:48,671 INFO L276 IsEmpty]: Start isEmpty. Operand 1965 states and 3117 transitions. [2020-12-22 09:37:48,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-22 09:37:48,672 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:37:48,673 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 09:37:48,673 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 09:37:48,673 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:37:48,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:37:48,674 INFO L82 PathProgramCache]: Analyzing trace with hash -1900121563, now seen corresponding path program 1 times [2020-12-22 09:37:48,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:37:48,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107890729] [2020-12-22 09:37:48,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:37:48,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:48,771 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 09:37:48,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107890729] [2020-12-22 09:37:48,774 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:37:48,774 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:37:48,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788061176] [2020-12-22 09:37:48,775 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:37:48,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:37:48,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:37:48,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:37:48,777 INFO L87 Difference]: Start difference. First operand 1965 states and 3117 transitions. Second operand 3 states. [2020-12-22 09:37:48,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:37:48,884 INFO L93 Difference]: Finished difference Result 2420 states and 3779 transitions. [2020-12-22 09:37:48,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:37:48,885 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 45 [2020-12-22 09:37:48,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:37:48,902 INFO L225 Difference]: With dead ends: 2420 [2020-12-22 09:37:48,903 INFO L226 Difference]: Without dead ends: 2161 [2020-12-22 09:37:48,904 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 09:37:48,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2161 states. [2020-12-22 09:37:49,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2161 to 2159. [2020-12-22 09:37:49,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2159 states. [2020-12-22 09:37:49,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2159 states to 2159 states and 3387 transitions. [2020-12-22 09:37:49,032 INFO L78 Accepts]: Start accepts. Automaton has 2159 states and 3387 transitions. Word has length 45 [2020-12-22 09:37:49,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:37:49,034 INFO L481 AbstractCegarLoop]: Abstraction has 2159 states and 3387 transitions. [2020-12-22 09:37:49,034 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:37:49,034 INFO L276 IsEmpty]: Start isEmpty. Operand 2159 states and 3387 transitions. [2020-12-22 09:37:49,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 09:37:49,035 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:37:49,035 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:37:49,036 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 09:37:49,036 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:37:49,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:37:49,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1836022441, now seen corresponding path program 1 times [2020-12-22 09:37:49,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:37:49,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183133385] [2020-12-22 09:37:49,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:37:49,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:49,182 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 09:37:49,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183133385] [2020-12-22 09:37:49,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:37:49,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:37:49,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624505464] [2020-12-22 09:37:49,185 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:37:49,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:37:49,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:37:49,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:37:49,186 INFO L87 Difference]: Start difference. First operand 2159 states and 3387 transitions. Second operand 5 states. [2020-12-22 09:37:49,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:37:49,485 INFO L93 Difference]: Finished difference Result 4187 states and 6263 transitions. [2020-12-22 09:37:49,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:37:49,495 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2020-12-22 09:37:49,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:37:49,518 INFO L225 Difference]: With dead ends: 4187 [2020-12-22 09:37:49,519 INFO L226 Difference]: Without dead ends: 3557 [2020-12-22 09:37:49,523 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:37:49,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3557 states. [2020-12-22 09:37:49,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3557 to 2787. [2020-12-22 09:37:49,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2787 states. [2020-12-22 09:37:49,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2787 states to 2787 states and 4271 transitions. [2020-12-22 09:37:49,731 INFO L78 Accepts]: Start accepts. Automaton has 2787 states and 4271 transitions. Word has length 63 [2020-12-22 09:37:49,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:37:49,732 INFO L481 AbstractCegarLoop]: Abstraction has 2787 states and 4271 transitions. [2020-12-22 09:37:49,732 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:37:49,732 INFO L276 IsEmpty]: Start isEmpty. Operand 2787 states and 4271 transitions. [2020-12-22 09:37:49,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 09:37:49,733 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:37:49,734 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:37:49,734 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 09:37:49,734 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:37:49,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:37:49,735 INFO L82 PathProgramCache]: Analyzing trace with hash 67239625, now seen corresponding path program 1 times [2020-12-22 09:37:49,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:37:49,736 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904052898] [2020-12-22 09:37:49,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:37:49,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:49,840 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 09:37:49,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904052898] [2020-12-22 09:37:49,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:37:49,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:37:49,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137925073] [2020-12-22 09:37:49,842 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:37:49,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:37:49,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:37:49,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:37:49,846 INFO L87 Difference]: Start difference. First operand 2787 states and 4271 transitions. Second operand 5 states. [2020-12-22 09:37:50,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:37:50,201 INFO L93 Difference]: Finished difference Result 4815 states and 7147 transitions. [2020-12-22 09:37:50,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:37:50,202 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2020-12-22 09:37:50,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:37:50,244 INFO L225 Difference]: With dead ends: 4815 [2020-12-22 09:37:50,245 INFO L226 Difference]: Without dead ends: 4185 [2020-12-22 09:37:50,248 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:37:50,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4185 states. [2020-12-22 09:37:50,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4185 to 3731. [2020-12-22 09:37:50,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3731 states. [2020-12-22 09:37:50,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3731 states to 3731 states and 5587 transitions. [2020-12-22 09:37:50,570 INFO L78 Accepts]: Start accepts. Automaton has 3731 states and 5587 transitions. Word has length 63 [2020-12-22 09:37:50,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:37:50,570 INFO L481 AbstractCegarLoop]: Abstraction has 3731 states and 5587 transitions. [2020-12-22 09:37:50,570 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:37:50,570 INFO L276 IsEmpty]: Start isEmpty. Operand 3731 states and 5587 transitions. [2020-12-22 09:37:50,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 09:37:50,572 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:37:50,573 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:37:50,573 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 09:37:50,573 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:37:50,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:37:50,574 INFO L82 PathProgramCache]: Analyzing trace with hash 2131767521, now seen corresponding path program 1 times [2020-12-22 09:37:50,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:37:50,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918474762] [2020-12-22 09:37:50,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:37:50,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:50,645 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:37:50,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918474762] [2020-12-22 09:37:50,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:37:50,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:37:50,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982706515] [2020-12-22 09:37:50,647 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:37:50,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:37:50,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:37:50,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:37:50,649 INFO L87 Difference]: Start difference. First operand 3731 states and 5587 transitions. Second operand 3 states. [2020-12-22 09:37:50,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:37:50,861 INFO L93 Difference]: Finished difference Result 5324 states and 7854 transitions. [2020-12-22 09:37:50,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:37:50,862 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2020-12-22 09:37:50,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:37:50,872 INFO L225 Difference]: With dead ends: 5324 [2020-12-22 09:37:50,872 INFO L226 Difference]: Without dead ends: 3122 [2020-12-22 09:37:50,877 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 09:37:50,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3122 states. [2020-12-22 09:37:51,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3122 to 3120. [2020-12-22 09:37:51,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3120 states. [2020-12-22 09:37:51,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3120 states to 3120 states and 4727 transitions. [2020-12-22 09:37:51,089 INFO L78 Accepts]: Start accepts. Automaton has 3120 states and 4727 transitions. Word has length 65 [2020-12-22 09:37:51,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:37:51,090 INFO L481 AbstractCegarLoop]: Abstraction has 3120 states and 4727 transitions. [2020-12-22 09:37:51,090 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:37:51,090 INFO L276 IsEmpty]: Start isEmpty. Operand 3120 states and 4727 transitions. [2020-12-22 09:37:51,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 09:37:51,091 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:37:51,092 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:37:51,092 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 09:37:51,092 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:37:51,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:37:51,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1187468114, now seen corresponding path program 1 times [2020-12-22 09:37:51,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:37:51,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321032203] [2020-12-22 09:37:51,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:37:51,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:51,184 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:37:51,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321032203] [2020-12-22 09:37:51,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:37:51,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:37:51,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862407400] [2020-12-22 09:37:51,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:37:51,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:37:51,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:37:51,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:37:51,195 INFO L87 Difference]: Start difference. First operand 3120 states and 4727 transitions. Second operand 5 states. [2020-12-22 09:37:51,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:37:51,544 INFO L93 Difference]: Finished difference Result 4472 states and 6651 transitions. [2020-12-22 09:37:51,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:37:51,546 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 65 [2020-12-22 09:37:51,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:37:51,559 INFO L225 Difference]: With dead ends: 4472 [2020-12-22 09:37:51,559 INFO L226 Difference]: Without dead ends: 4022 [2020-12-22 09:37:51,563 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:37:51,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4022 states. [2020-12-22 09:37:51,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4022 to 3568. [2020-12-22 09:37:51,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3568 states. [2020-12-22 09:37:51,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3568 states to 3568 states and 5359 transitions. [2020-12-22 09:37:51,807 INFO L78 Accepts]: Start accepts. Automaton has 3568 states and 5359 transitions. Word has length 65 [2020-12-22 09:37:51,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:37:51,807 INFO L481 AbstractCegarLoop]: Abstraction has 3568 states and 5359 transitions. [2020-12-22 09:37:51,807 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:37:51,807 INFO L276 IsEmpty]: Start isEmpty. Operand 3568 states and 5359 transitions. [2020-12-22 09:37:51,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:37:51,809 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:37:51,809 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:37:51,809 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 09:37:51,810 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:37:51,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:37:51,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1662229482, now seen corresponding path program 1 times [2020-12-22 09:37:51,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:37:51,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415700895] [2020-12-22 09:37:51,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:37:51,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:52,093 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:37:52,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415700895] [2020-12-22 09:37:52,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939915375] [2020-12-22 09:37:52,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:37:52,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:52,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 09:37:52,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:37:52,696 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:37:52,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:37:52,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4] total 12 [2020-12-22 09:37:52,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177746720] [2020-12-22 09:37:52,699 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 09:37:52,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:37:52,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 09:37:52,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-12-22 09:37:52,700 INFO L87 Difference]: Start difference. First operand 3568 states and 5359 transitions. Second operand 12 states. [2020-12-22 09:37:56,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:37:56,924 INFO L93 Difference]: Finished difference Result 12862 states and 18115 transitions. [2020-12-22 09:37:56,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-22 09:37:56,925 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 66 [2020-12-22 09:37:56,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:37:56,949 INFO L225 Difference]: With dead ends: 12862 [2020-12-22 09:37:56,949 INFO L226 Difference]: Without dead ends: 10844 [2020-12-22 09:37:56,958 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 571 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=441, Invalid=1629, Unknown=0, NotChecked=0, Total=2070 [2020-12-22 09:37:56,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10844 states. [2020-12-22 09:37:57,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10844 to 7580. [2020-12-22 09:37:57,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7580 states. [2020-12-22 09:37:57,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7580 states to 7580 states and 10636 transitions. [2020-12-22 09:37:57,884 INFO L78 Accepts]: Start accepts. Automaton has 7580 states and 10636 transitions. Word has length 66 [2020-12-22 09:37:57,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:37:57,885 INFO L481 AbstractCegarLoop]: Abstraction has 7580 states and 10636 transitions. [2020-12-22 09:37:57,885 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 09:37:57,885 INFO L276 IsEmpty]: Start isEmpty. Operand 7580 states and 10636 transitions. [2020-12-22 09:37:57,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:37:57,887 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:37:57,887 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:37:58,100 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-22 09:37:58,101 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:37:58,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:37:58,102 INFO L82 PathProgramCache]: Analyzing trace with hash -44763738, now seen corresponding path program 1 times [2020-12-22 09:37:58,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:37:58,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668970184] [2020-12-22 09:37:58,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:37:58,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:58,427 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:37:58,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668970184] [2020-12-22 09:37:58,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976666960] [2020-12-22 09:37:58,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:37:58,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:58,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 09:37:58,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:37:58,763 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:37:59,128 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:37:59,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:37:59,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:37:59,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822545615] [2020-12-22 09:37:59,130 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:37:59,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:37:59,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:37:59,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:37:59,131 INFO L87 Difference]: Start difference. First operand 7580 states and 10636 transitions. Second operand 17 states. [2020-12-22 09:38:03,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:38:03,913 INFO L93 Difference]: Finished difference Result 31451 states and 42694 transitions. [2020-12-22 09:38:03,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 09:38:03,914 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 67 [2020-12-22 09:38:03,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:38:03,991 INFO L225 Difference]: With dead ends: 31451 [2020-12-22 09:38:03,991 INFO L226 Difference]: Without dead ends: 26540 [2020-12-22 09:38:04,010 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=331, Invalid=1075, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 09:38:04,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26540 states. [2020-12-22 09:38:05,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26540 to 15253. [2020-12-22 09:38:05,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15253 states. [2020-12-22 09:38:05,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15253 states to 15253 states and 20922 transitions. [2020-12-22 09:38:05,747 INFO L78 Accepts]: Start accepts. Automaton has 15253 states and 20922 transitions. Word has length 67 [2020-12-22 09:38:05,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:38:05,747 INFO L481 AbstractCegarLoop]: Abstraction has 15253 states and 20922 transitions. [2020-12-22 09:38:05,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:38:05,747 INFO L276 IsEmpty]: Start isEmpty. Operand 15253 states and 20922 transitions. [2020-12-22 09:38:05,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:38:05,750 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:38:05,750 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:38:05,965 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-22 09:38:05,966 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:38:05,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:38:05,968 INFO L82 PathProgramCache]: Analyzing trace with hash -2066736808, now seen corresponding path program 1 times [2020-12-22 09:38:05,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:38:05,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706741784] [2020-12-22 09:38:05,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:38:06,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:38:06,290 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:38:06,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706741784] [2020-12-22 09:38:06,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515894510] [2020-12-22 09:38:06,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:38:06,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:38:06,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 09:38:06,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:38:06,592 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:38:07,001 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:38:07,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:38:07,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:38:07,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613768246] [2020-12-22 09:38:07,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:38:07,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:38:07,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:38:07,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:38:07,005 INFO L87 Difference]: Start difference. First operand 15253 states and 20922 transitions. Second operand 17 states. [2020-12-22 09:38:14,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:38:14,893 INFO L93 Difference]: Finished difference Result 76692 states and 103578 transitions. [2020-12-22 09:38:14,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 09:38:14,893 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 67 [2020-12-22 09:38:14,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:38:15,154 INFO L225 Difference]: With dead ends: 76692 [2020-12-22 09:38:15,154 INFO L226 Difference]: Without dead ends: 65262 [2020-12-22 09:38:15,214 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=591, Invalid=1665, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 09:38:15,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65262 states. [2020-12-22 09:38:18,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65262 to 33304. [2020-12-22 09:38:18,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33304 states. [2020-12-22 09:38:18,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33304 states to 33304 states and 45190 transitions. [2020-12-22 09:38:18,642 INFO L78 Accepts]: Start accepts. Automaton has 33304 states and 45190 transitions. Word has length 67 [2020-12-22 09:38:18,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:38:18,642 INFO L481 AbstractCegarLoop]: Abstraction has 33304 states and 45190 transitions. [2020-12-22 09:38:18,642 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:38:18,642 INFO L276 IsEmpty]: Start isEmpty. Operand 33304 states and 45190 transitions. [2020-12-22 09:38:18,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:38:18,645 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:38:18,645 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:38:18,858 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-22 09:38:18,859 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:38:18,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:38:18,860 INFO L82 PathProgramCache]: Analyzing trace with hash -848751410, now seen corresponding path program 1 times [2020-12-22 09:38:18,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:38:18,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108124727] [2020-12-22 09:38:18,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:38:18,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:38:18,914 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:38:18,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108124727] [2020-12-22 09:38:18,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:38:18,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:38:18,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349099644] [2020-12-22 09:38:18,916 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:38:18,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:38:18,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:38:18,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:38:18,918 INFO L87 Difference]: Start difference. First operand 33304 states and 45190 transitions. Second operand 3 states. [2020-12-22 09:38:20,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:38:20,419 INFO L93 Difference]: Finished difference Result 48522 states and 65799 transitions. [2020-12-22 09:38:20,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:38:20,420 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 67 [2020-12-22 09:38:20,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:38:20,457 INFO L225 Difference]: With dead ends: 48522 [2020-12-22 09:38:20,458 INFO L226 Difference]: Without dead ends: 20010 [2020-12-22 09:38:20,498 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 09:38:20,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20010 states. [2020-12-22 09:38:22,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20010 to 19774. [2020-12-22 09:38:22,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19774 states. [2020-12-22 09:38:22,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19774 states to 19774 states and 26352 transitions. [2020-12-22 09:38:22,267 INFO L78 Accepts]: Start accepts. Automaton has 19774 states and 26352 transitions. Word has length 67 [2020-12-22 09:38:22,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:38:22,267 INFO L481 AbstractCegarLoop]: Abstraction has 19774 states and 26352 transitions. [2020-12-22 09:38:22,267 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:38:22,267 INFO L276 IsEmpty]: Start isEmpty. Operand 19774 states and 26352 transitions. [2020-12-22 09:38:22,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:38:22,270 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:38:22,270 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:38:22,270 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 09:38:22,270 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:38:22,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:38:22,271 INFO L82 PathProgramCache]: Analyzing trace with hash -2096259026, now seen corresponding path program 1 times [2020-12-22 09:38:22,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:38:22,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305746648] [2020-12-22 09:38:22,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:38:22,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:38:22,315 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:38:22,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305746648] [2020-12-22 09:38:22,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:38:22,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:38:22,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542299233] [2020-12-22 09:38:22,317 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:38:22,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:38:22,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:38:22,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:38:22,318 INFO L87 Difference]: Start difference. First operand 19774 states and 26352 transitions. Second operand 3 states. [2020-12-22 09:38:23,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:38:23,889 INFO L93 Difference]: Finished difference Result 29676 states and 39483 transitions. [2020-12-22 09:38:23,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:38:23,890 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 67 [2020-12-22 09:38:23,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:38:23,911 INFO L225 Difference]: With dead ends: 29676 [2020-12-22 09:38:23,911 INFO L226 Difference]: Without dead ends: 13664 [2020-12-22 09:38:23,928 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 09:38:23,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13664 states. [2020-12-22 09:38:25,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13664 to 13662. [2020-12-22 09:38:25,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13662 states. [2020-12-22 09:38:25,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13662 states to 13662 states and 17975 transitions. [2020-12-22 09:38:25,424 INFO L78 Accepts]: Start accepts. Automaton has 13662 states and 17975 transitions. Word has length 67 [2020-12-22 09:38:25,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:38:25,425 INFO L481 AbstractCegarLoop]: Abstraction has 13662 states and 17975 transitions. [2020-12-22 09:38:25,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:38:25,425 INFO L276 IsEmpty]: Start isEmpty. Operand 13662 states and 17975 transitions. [2020-12-22 09:38:25,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:38:25,427 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:38:25,427 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:38:25,427 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 09:38:25,427 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:38:25,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:38:25,428 INFO L82 PathProgramCache]: Analyzing trace with hash 873869654, now seen corresponding path program 1 times [2020-12-22 09:38:25,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:38:25,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162641530] [2020-12-22 09:38:25,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:38:25,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:38:25,504 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 09:38:25,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162641530] [2020-12-22 09:38:25,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:38:25,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:38:25,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698906756] [2020-12-22 09:38:25,507 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:38:25,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:38:25,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:38:25,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:38:25,510 INFO L87 Difference]: Start difference. First operand 13662 states and 17975 transitions. Second operand 6 states. [2020-12-22 09:38:26,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:38:26,477 INFO L93 Difference]: Finished difference Result 23425 states and 30527 transitions. [2020-12-22 09:38:26,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:38:26,477 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-12-22 09:38:26,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:38:26,489 INFO L225 Difference]: With dead ends: 23425 [2020-12-22 09:38:26,490 INFO L226 Difference]: Without dead ends: 11373 [2020-12-22 09:38:26,497 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:38:26,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11373 states. [2020-12-22 09:38:27,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11373 to 11373. [2020-12-22 09:38:27,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11373 states. [2020-12-22 09:38:27,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11373 states to 11373 states and 14856 transitions. [2020-12-22 09:38:27,401 INFO L78 Accepts]: Start accepts. Automaton has 11373 states and 14856 transitions. Word has length 67 [2020-12-22 09:38:27,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:38:27,401 INFO L481 AbstractCegarLoop]: Abstraction has 11373 states and 14856 transitions. [2020-12-22 09:38:27,401 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:38:27,401 INFO L276 IsEmpty]: Start isEmpty. Operand 11373 states and 14856 transitions. [2020-12-22 09:38:27,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:38:27,403 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:38:27,403 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:38:27,403 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 09:38:27,403 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:38:27,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:38:27,404 INFO L82 PathProgramCache]: Analyzing trace with hash 1198871190, now seen corresponding path program 1 times [2020-12-22 09:38:27,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:38:27,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104405724] [2020-12-22 09:38:27,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:38:27,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:38:27,467 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 09:38:27,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104405724] [2020-12-22 09:38:27,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:38:27,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:38:27,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697340989] [2020-12-22 09:38:27,468 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:38:27,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:38:27,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:38:27,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:38:27,469 INFO L87 Difference]: Start difference. First operand 11373 states and 14856 transitions. Second operand 6 states. [2020-12-22 09:38:28,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:38:28,362 INFO L93 Difference]: Finished difference Result 18542 states and 23919 transitions. [2020-12-22 09:38:28,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:38:28,363 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-12-22 09:38:28,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:38:28,374 INFO L225 Difference]: With dead ends: 18542 [2020-12-22 09:38:28,374 INFO L226 Difference]: Without dead ends: 8813 [2020-12-22 09:38:28,382 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:38:28,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8813 states. [2020-12-22 09:38:29,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8813 to 8813. [2020-12-22 09:38:29,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8813 states. [2020-12-22 09:38:29,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8813 states to 8813 states and 11508 transitions. [2020-12-22 09:38:29,295 INFO L78 Accepts]: Start accepts. Automaton has 8813 states and 11508 transitions. Word has length 67 [2020-12-22 09:38:29,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:38:29,295 INFO L481 AbstractCegarLoop]: Abstraction has 8813 states and 11508 transitions. [2020-12-22 09:38:29,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:38:29,295 INFO L276 IsEmpty]: Start isEmpty. Operand 8813 states and 11508 transitions. [2020-12-22 09:38:29,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:38:29,297 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:38:29,297 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:38:29,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 09:38:29,297 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:38:29,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:38:29,298 INFO L82 PathProgramCache]: Analyzing trace with hash -49807498, now seen corresponding path program 1 times [2020-12-22 09:38:29,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:38:29,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754994331] [2020-12-22 09:38:29,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:38:29,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:38:29,372 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 09:38:29,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754994331] [2020-12-22 09:38:29,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:38:29,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:38:29,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691683532] [2020-12-22 09:38:29,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:38:29,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:38:29,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:38:29,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:38:29,374 INFO L87 Difference]: Start difference. First operand 8813 states and 11508 transitions. Second operand 6 states. [2020-12-22 09:38:30,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:38:30,224 INFO L93 Difference]: Finished difference Result 14363 states and 18453 transitions. [2020-12-22 09:38:30,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:38:30,225 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-12-22 09:38:30,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:38:30,233 INFO L225 Difference]: With dead ends: 14363 [2020-12-22 09:38:30,233 INFO L226 Difference]: Without dead ends: 7116 [2020-12-22 09:38:30,239 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:38:30,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7116 states. [2020-12-22 09:38:30,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7116 to 7116. [2020-12-22 09:38:30,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7116 states. [2020-12-22 09:38:30,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7116 states to 7116 states and 9362 transitions. [2020-12-22 09:38:30,818 INFO L78 Accepts]: Start accepts. Automaton has 7116 states and 9362 transitions. Word has length 67 [2020-12-22 09:38:30,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:38:30,819 INFO L481 AbstractCegarLoop]: Abstraction has 7116 states and 9362 transitions. [2020-12-22 09:38:30,819 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:38:30,819 INFO L276 IsEmpty]: Start isEmpty. Operand 7116 states and 9362 transitions. [2020-12-22 09:38:30,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 09:38:30,820 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:38:30,820 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:38:30,820 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 09:38:30,821 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:38:30,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:38:30,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1937529655, now seen corresponding path program 1 times [2020-12-22 09:38:30,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:38:30,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843154803] [2020-12-22 09:38:30,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:38:30,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:38:31,411 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:38:31,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843154803] [2020-12-22 09:38:31,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294907005] [2020-12-22 09:38:31,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:38:31,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:38:31,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-22 09:38:31,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:38:32,282 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:38:32,298 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:38:32,299 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:38:32,305 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:38:32,560 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 28 [2020-12-22 09:38:32,813 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:38:32,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:38:32,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 26 [2020-12-22 09:38:32,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273290387] [2020-12-22 09:38:32,814 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-22 09:38:32,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:38:32,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-22 09:38:32,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2020-12-22 09:38:32,815 INFO L87 Difference]: Start difference. First operand 7116 states and 9362 transitions. Second operand 26 states. [2020-12-22 09:38:33,592 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 29 [2020-12-22 09:38:33,762 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-22 09:38:33,971 WARN L197 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2020-12-22 09:38:34,281 WARN L197 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 51 [2020-12-22 09:38:34,559 WARN L197 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2020-12-22 09:38:34,871 WARN L197 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2020-12-22 09:38:35,160 WARN L197 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2020-12-22 09:38:35,451 WARN L197 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2020-12-22 09:38:35,771 WARN L197 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 61 [2020-12-22 09:38:36,092 WARN L197 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2020-12-22 09:38:36,332 WARN L197 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2020-12-22 09:38:36,529 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2020-12-22 09:38:36,733 WARN L197 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2020-12-22 09:38:37,287 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 39 [2020-12-22 09:38:37,747 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 34 [2020-12-22 09:38:37,957 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2020-12-22 09:38:38,305 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2020-12-22 09:38:38,617 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2020-12-22 09:38:38,947 WARN L197 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2020-12-22 09:38:39,113 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 34 [2020-12-22 09:38:39,575 WARN L197 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2020-12-22 09:38:40,331 WARN L197 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 56 [2020-12-22 09:38:40,755 WARN L197 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2020-12-22 09:38:41,091 WARN L197 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 54 [2020-12-22 09:38:41,327 WARN L197 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 44 [2020-12-22 09:38:41,636 WARN L197 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2020-12-22 09:38:41,881 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2020-12-22 09:38:42,102 WARN L197 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 42 [2020-12-22 09:38:42,370 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 34 [2020-12-22 09:38:42,548 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2020-12-22 09:38:42,968 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 34 [2020-12-22 09:38:45,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:38:45,089 INFO L93 Difference]: Finished difference Result 13247 states and 17055 transitions. [2020-12-22 09:38:45,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-12-22 09:38:45,092 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 68 [2020-12-22 09:38:45,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:38:45,104 INFO L225 Difference]: With dead ends: 13247 [2020-12-22 09:38:45,105 INFO L226 Difference]: Without dead ends: 10342 [2020-12-22 09:38:45,111 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2087 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=1297, Invalid=6359, Unknown=0, NotChecked=0, Total=7656 [2020-12-22 09:38:45,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10342 states. [2020-12-22 09:38:45,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10342 to 6278. [2020-12-22 09:38:45,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6278 states. [2020-12-22 09:38:45,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6278 states to 6278 states and 8381 transitions. [2020-12-22 09:38:45,698 INFO L78 Accepts]: Start accepts. Automaton has 6278 states and 8381 transitions. Word has length 68 [2020-12-22 09:38:45,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:38:45,699 INFO L481 AbstractCegarLoop]: Abstraction has 6278 states and 8381 transitions. [2020-12-22 09:38:45,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-22 09:38:45,699 INFO L276 IsEmpty]: Start isEmpty. Operand 6278 states and 8381 transitions. [2020-12-22 09:38:45,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 09:38:45,700 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:38:45,700 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:38:45,901 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:38:45,902 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:38:45,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:38:45,904 INFO L82 PathProgramCache]: Analyzing trace with hash 75217277, now seen corresponding path program 1 times [2020-12-22 09:38:45,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:38:45,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990470734] [2020-12-22 09:38:45,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:38:45,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:38:46,943 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:38:46,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990470734] [2020-12-22 09:38:46,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671178262] [2020-12-22 09:38:46,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:38:47,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:38:47,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-22 09:38:47,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:38:49,359 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2020-12-22 09:38:49,377 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 2, 1] term [2020-12-22 09:38:49,378 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:38:49,380 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 09:38:50,046 WARN L197 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 44