/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_overflow.ufo.UNBOUNDED.pals+Problem12_label04.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 09:40:58,103 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 09:40:58,106 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 09:40:58,154 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 09:40:58,155 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 09:40:58,160 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 09:40:58,163 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 09:40:58,183 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 09:40:58,186 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 09:40:58,192 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 09:40:58,193 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 09:40:58,195 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 09:40:58,195 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 09:40:58,198 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 09:40:58,200 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 09:40:58,201 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 09:40:58,202 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 09:40:58,205 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 09:40:58,212 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 09:40:58,219 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 09:40:58,221 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 09:40:58,223 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 09:40:58,224 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 09:40:58,226 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 09:40:58,235 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 09:40:58,240 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 09:40:58,243 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 09:40:58,244 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 09:40:58,245 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 09:40:58,246 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 09:40:58,246 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 09:40:58,246 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 09:40:58,247 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 09:40:58,247 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 09:40:58,250 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 09:40:58,250 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 09:40:58,251 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 09:40:58,279 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 09:40:58,279 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 09:40:58,281 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 09:40:58,281 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 09:40:58,281 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 09:40:58,281 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 09:40:58,282 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 09:40:58,282 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 09:40:58,282 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 09:40:58,282 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 09:40:58,282 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 09:40:58,283 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 09:40:58,283 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 09:40:58,283 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 09:40:58,283 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 09:40:58,283 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 09:40:58,284 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 09:40:58,284 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:40:58,284 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 09:40:58,284 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 09:40:58,285 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 09:40:58,285 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 09:40:58,285 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 09:40:58,285 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 09:40:58,285 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 09:40:58,285 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 09:40:58,658 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 09:40:58,696 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 09:40:58,701 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 09:40:58,703 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 09:40:58,704 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 09:40:58,705 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.3_overflow.ufo.UNBOUNDED.pals+Problem12_label04.c [2020-12-22 09:40:58,781 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/657b5c1ed/a04e3e3e63314ca8b39c533b09f1bb19/FLAG551a231a9 [2020-12-22 09:40:59,825 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 09:40:59,826 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.3_overflow.ufo.UNBOUNDED.pals+Problem12_label04.c [2020-12-22 09:40:59,874 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/657b5c1ed/a04e3e3e63314ca8b39c533b09f1bb19/FLAG551a231a9 [2020-12-22 09:41:00,213 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/657b5c1ed/a04e3e3e63314ca8b39c533b09f1bb19 [2020-12-22 09:41:00,216 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 09:41:00,219 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 09:41:00,223 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 09:41:00,223 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 09:41:00,227 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 09:41:00,228 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:41:00" (1/1) ... [2020-12-22 09:41:00,230 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ba104a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:41:00, skipping insertion in model container [2020-12-22 09:41:00,230 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:41:00" (1/1) ... [2020-12-22 09:41:00,238 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 09:41:00,405 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 09:41:00,679 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_overflow.ufo.UNBOUNDED.pals+Problem12_label04.c[6582,6595] [2020-12-22 09:41:00,753 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_overflow.ufo.UNBOUNDED.pals+Problem12_label04.c[13400,13413] [2020-12-22 09:41:01,658 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:41:01,673 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 09:41:01,739 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_overflow.ufo.UNBOUNDED.pals+Problem12_label04.c[6582,6595] [2020-12-22 09:41:01,758 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_overflow.ufo.UNBOUNDED.pals+Problem12_label04.c[13400,13413] [2020-12-22 09:41:02,432 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:41:02,475 INFO L208 MainTranslator]: Completed translation [2020-12-22 09:41:02,476 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:41:02 WrapperNode [2020-12-22 09:41:02,476 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 09:41:02,478 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 09:41:02,478 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 09:41:02,481 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 09:41:02,490 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:41:02" (1/1) ... [2020-12-22 09:41:02,572 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:41:02" (1/1) ... [2020-12-22 09:41:02,967 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 09:41:02,969 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 09:41:02,969 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 09:41:02,969 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 09:41:02,977 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:41:02" (1/1) ... [2020-12-22 09:41:02,978 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:41:02" (1/1) ... [2020-12-22 09:41:03,040 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:41:02" (1/1) ... [2020-12-22 09:41:03,041 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:41:02" (1/1) ... [2020-12-22 09:41:03,362 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:41:02" (1/1) ... [2020-12-22 09:41:03,392 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:41:02" (1/1) ... [2020-12-22 09:41:03,564 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:41:02" (1/1) ... [2020-12-22 09:41:03,659 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 09:41:03,660 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 09:41:03,661 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 09:41:03,661 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 09:41:03,662 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:41:02" (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 09:41:03,768 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 09:41:03,769 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 09:41:03,769 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 09:41:03,769 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 09:41:08,737 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 09:41:08,738 INFO L299 CfgBuilder]: Removed 32 assume(true) statements. [2020-12-22 09:41:08,742 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:41:08 BoogieIcfgContainer [2020-12-22 09:41:08,743 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 09:41:08,747 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 09:41:08,750 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 09:41:08,753 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 09:41:08,754 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:41:00" (1/3) ... [2020-12-22 09:41:08,755 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@638d84aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:41:08, skipping insertion in model container [2020-12-22 09:41:08,755 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:41:02" (2/3) ... [2020-12-22 09:41:08,755 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@638d84aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:41:08, skipping insertion in model container [2020-12-22 09:41:08,755 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:41:08" (3/3) ... [2020-12-22 09:41:08,757 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3_overflow.ufo.UNBOUNDED.pals+Problem12_label04.c [2020-12-22 09:41:08,764 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 09:41:08,770 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 09:41:08,793 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 09:41:08,849 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 09:41:08,849 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 09:41:08,850 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 09:41:08,850 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 09:41:08,850 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 09:41:08,850 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 09:41:08,850 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 09:41:08,850 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 09:41:08,888 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states. [2020-12-22 09:41:08,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 09:41:08,902 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:08,907 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 09:41:08,908 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:08,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:08,915 INFO L82 PathProgramCache]: Analyzing trace with hash 975463267, now seen corresponding path program 1 times [2020-12-22 09:41:08,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:08,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580894414] [2020-12-22 09:41:08,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:09,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:09,230 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 09:41:09,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580894414] [2020-12-22 09:41:09,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:09,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:41:09,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105368774] [2020-12-22 09:41:09,238 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 09:41:09,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:09,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 09:41:09,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 09:41:09,254 INFO L87 Difference]: Start difference. First operand 877 states. Second operand 2 states. [2020-12-22 09:41:09,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:09,337 INFO L93 Difference]: Finished difference Result 1730 states and 3288 transitions. [2020-12-22 09:41:09,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 09:41:09,339 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 26 [2020-12-22 09:41:09,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:09,364 INFO L225 Difference]: With dead ends: 1730 [2020-12-22 09:41:09,364 INFO L226 Difference]: Without dead ends: 811 [2020-12-22 09:41:09,373 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 09:41:09,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2020-12-22 09:41:09,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 811. [2020-12-22 09:41:09,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 811 states. [2020-12-22 09:41:09,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 811 states to 811 states and 1532 transitions. [2020-12-22 09:41:09,493 INFO L78 Accepts]: Start accepts. Automaton has 811 states and 1532 transitions. Word has length 26 [2020-12-22 09:41:09,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:09,493 INFO L481 AbstractCegarLoop]: Abstraction has 811 states and 1532 transitions. [2020-12-22 09:41:09,494 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 09:41:09,494 INFO L276 IsEmpty]: Start isEmpty. Operand 811 states and 1532 transitions. [2020-12-22 09:41:09,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 09:41:09,497 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:09,497 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 09:41:09,498 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 09:41:09,498 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:09,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:09,500 INFO L82 PathProgramCache]: Analyzing trace with hash 157814817, now seen corresponding path program 1 times [2020-12-22 09:41:09,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:09,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564026172] [2020-12-22 09:41:09,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:09,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:09,675 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 09:41:09,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564026172] [2020-12-22 09:41:09,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:09,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:41:09,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361376464] [2020-12-22 09:41:09,679 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:41:09,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:09,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:41:09,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:41:09,681 INFO L87 Difference]: Start difference. First operand 811 states and 1532 transitions. Second operand 5 states. [2020-12-22 09:41:09,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:09,792 INFO L93 Difference]: Finished difference Result 850 states and 1591 transitions. [2020-12-22 09:41:09,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:41:09,792 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2020-12-22 09:41:09,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:09,798 INFO L225 Difference]: With dead ends: 850 [2020-12-22 09:41:09,798 INFO L226 Difference]: Without dead ends: 811 [2020-12-22 09:41:09,800 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 09:41:09,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2020-12-22 09:41:09,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 811. [2020-12-22 09:41:09,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 811 states. [2020-12-22 09:41:09,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 811 states to 811 states and 1516 transitions. [2020-12-22 09:41:09,824 INFO L78 Accepts]: Start accepts. Automaton has 811 states and 1516 transitions. Word has length 26 [2020-12-22 09:41:09,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:09,825 INFO L481 AbstractCegarLoop]: Abstraction has 811 states and 1516 transitions. [2020-12-22 09:41:09,825 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:41:09,825 INFO L276 IsEmpty]: Start isEmpty. Operand 811 states and 1516 transitions. [2020-12-22 09:41:09,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-22 09:41:09,832 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:09,832 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 09:41:09,833 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 09:41:09,833 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:09,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:09,834 INFO L82 PathProgramCache]: Analyzing trace with hash -1324654887, now seen corresponding path program 1 times [2020-12-22 09:41:09,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:09,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125424190] [2020-12-22 09:41:09,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:09,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:09,963 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 09:41:09,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125424190] [2020-12-22 09:41:09,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:09,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:41:09,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580568690] [2020-12-22 09:41:09,965 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:41:09,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:09,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:41:09,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:41:09,970 INFO L87 Difference]: Start difference. First operand 811 states and 1516 transitions. Second operand 3 states. [2020-12-22 09:41:10,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:10,010 INFO L93 Difference]: Finished difference Result 875 states and 1616 transitions. [2020-12-22 09:41:10,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:41:10,011 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 41 [2020-12-22 09:41:10,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:10,020 INFO L225 Difference]: With dead ends: 875 [2020-12-22 09:41:10,021 INFO L226 Difference]: Without dead ends: 840 [2020-12-22 09:41:10,022 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 09:41:10,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 840 states. [2020-12-22 09:41:10,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 840 to 838. [2020-12-22 09:41:10,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 838 states. [2020-12-22 09:41:10,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 838 states to 838 states and 1559 transitions. [2020-12-22 09:41:10,059 INFO L78 Accepts]: Start accepts. Automaton has 838 states and 1559 transitions. Word has length 41 [2020-12-22 09:41:10,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:10,060 INFO L481 AbstractCegarLoop]: Abstraction has 838 states and 1559 transitions. [2020-12-22 09:41:10,060 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:41:10,060 INFO L276 IsEmpty]: Start isEmpty. Operand 838 states and 1559 transitions. [2020-12-22 09:41:10,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-22 09:41:10,064 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:10,064 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 09:41:10,065 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 09:41:10,065 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:10,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:10,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1376027727, now seen corresponding path program 1 times [2020-12-22 09:41:10,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:10,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671731487] [2020-12-22 09:41:10,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:10,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:10,214 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 09:41:10,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671731487] [2020-12-22 09:41:10,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:10,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:41:10,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904940654] [2020-12-22 09:41:10,216 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:41:10,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:10,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:41:10,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:41:10,218 INFO L87 Difference]: Start difference. First operand 838 states and 1559 transitions. Second operand 5 states. [2020-12-22 09:41:10,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:10,391 INFO L93 Difference]: Finished difference Result 1210 states and 2147 transitions. [2020-12-22 09:41:10,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:41:10,391 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 41 [2020-12-22 09:41:10,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:10,398 INFO L225 Difference]: With dead ends: 1210 [2020-12-22 09:41:10,399 INFO L226 Difference]: Without dead ends: 1148 [2020-12-22 09:41:10,399 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 09:41:10,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1148 states. [2020-12-22 09:41:10,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1148 to 898. [2020-12-22 09:41:10,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 898 states. [2020-12-22 09:41:10,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 1652 transitions. [2020-12-22 09:41:10,428 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 1652 transitions. Word has length 41 [2020-12-22 09:41:10,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:10,429 INFO L481 AbstractCegarLoop]: Abstraction has 898 states and 1652 transitions. [2020-12-22 09:41:10,429 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:41:10,430 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 1652 transitions. [2020-12-22 09:41:10,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 09:41:10,432 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:10,432 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 09:41:10,432 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 09:41:10,432 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:10,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:10,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1902982177, now seen corresponding path program 1 times [2020-12-22 09:41:10,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:10,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082150949] [2020-12-22 09:41:10,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:10,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:10,520 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 09:41:10,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082150949] [2020-12-22 09:41:10,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:10,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:41:10,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577309591] [2020-12-22 09:41:10,523 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:41:10,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:10,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:41:10,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:41:10,524 INFO L87 Difference]: Start difference. First operand 898 states and 1652 transitions. Second operand 3 states. [2020-12-22 09:41:10,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:10,576 INFO L93 Difference]: Finished difference Result 1079 states and 1933 transitions. [2020-12-22 09:41:10,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:41:10,577 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 43 [2020-12-22 09:41:10,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:10,583 INFO L225 Difference]: With dead ends: 1079 [2020-12-22 09:41:10,583 INFO L226 Difference]: Without dead ends: 957 [2020-12-22 09:41:10,584 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 09:41:10,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2020-12-22 09:41:10,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 955. [2020-12-22 09:41:10,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 955 states. [2020-12-22 09:41:10,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 955 states to 955 states and 1738 transitions. [2020-12-22 09:41:10,619 INFO L78 Accepts]: Start accepts. Automaton has 955 states and 1738 transitions. Word has length 43 [2020-12-22 09:41:10,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:10,678 INFO L481 AbstractCegarLoop]: Abstraction has 955 states and 1738 transitions. [2020-12-22 09:41:10,678 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:41:10,678 INFO L276 IsEmpty]: Start isEmpty. Operand 955 states and 1738 transitions. [2020-12-22 09:41:10,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 09:41:10,682 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:10,682 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 09:41:10,682 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 09:41:10,683 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:10,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:10,684 INFO L82 PathProgramCache]: Analyzing trace with hash -1836488665, now seen corresponding path program 1 times [2020-12-22 09:41:10,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:10,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007205723] [2020-12-22 09:41:10,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:10,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:10,843 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 09:41:10,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007205723] [2020-12-22 09:41:10,843 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:10,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:41:10,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113947268] [2020-12-22 09:41:10,846 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:41:10,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:10,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:41:10,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:41:10,848 INFO L87 Difference]: Start difference. First operand 955 states and 1738 transitions. Second operand 5 states. [2020-12-22 09:41:10,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:10,997 INFO L93 Difference]: Finished difference Result 1134 states and 2014 transitions. [2020-12-22 09:41:10,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:41:10,998 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 43 [2020-12-22 09:41:10,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:11,004 INFO L225 Difference]: With dead ends: 1134 [2020-12-22 09:41:11,005 INFO L226 Difference]: Without dead ends: 957 [2020-12-22 09:41:11,006 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 09:41:11,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2020-12-22 09:41:11,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 955. [2020-12-22 09:41:11,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 955 states. [2020-12-22 09:41:11,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 955 states to 955 states and 1735 transitions. [2020-12-22 09:41:11,033 INFO L78 Accepts]: Start accepts. Automaton has 955 states and 1735 transitions. Word has length 43 [2020-12-22 09:41:11,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:11,034 INFO L481 AbstractCegarLoop]: Abstraction has 955 states and 1735 transitions. [2020-12-22 09:41:11,034 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:41:11,034 INFO L276 IsEmpty]: Start isEmpty. Operand 955 states and 1735 transitions. [2020-12-22 09:41:11,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 09:41:11,035 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:11,035 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 09:41:11,035 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 09:41:11,035 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:11,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:11,036 INFO L82 PathProgramCache]: Analyzing trace with hash -47574589, now seen corresponding path program 1 times [2020-12-22 09:41:11,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:11,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916452267] [2020-12-22 09:41:11,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:11,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:11,077 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 09:41:11,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916452267] [2020-12-22 09:41:11,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:11,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:41:11,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301069436] [2020-12-22 09:41:11,079 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:41:11,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:11,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:41:11,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:41:11,081 INFO L87 Difference]: Start difference. First operand 955 states and 1735 transitions. Second operand 3 states. [2020-12-22 09:41:11,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:11,139 INFO L93 Difference]: Finished difference Result 1273 states and 2219 transitions. [2020-12-22 09:41:11,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:41:11,140 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 43 [2020-12-22 09:41:11,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:11,146 INFO L225 Difference]: With dead ends: 1273 [2020-12-22 09:41:11,146 INFO L226 Difference]: Without dead ends: 1096 [2020-12-22 09:41:11,147 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 09:41:11,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1096 states. [2020-12-22 09:41:11,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1096 to 1094. [2020-12-22 09:41:11,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1094 states. [2020-12-22 09:41:11,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1094 states to 1094 states and 1940 transitions. [2020-12-22 09:41:11,181 INFO L78 Accepts]: Start accepts. Automaton has 1094 states and 1940 transitions. Word has length 43 [2020-12-22 09:41:11,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:11,182 INFO L481 AbstractCegarLoop]: Abstraction has 1094 states and 1940 transitions. [2020-12-22 09:41:11,182 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:41:11,182 INFO L276 IsEmpty]: Start isEmpty. Operand 1094 states and 1940 transitions. [2020-12-22 09:41:11,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 09:41:11,182 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:11,183 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 09:41:11,183 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 09:41:11,183 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:11,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:11,184 INFO L82 PathProgramCache]: Analyzing trace with hash 1199933027, now seen corresponding path program 1 times [2020-12-22 09:41:11,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:11,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085737724] [2020-12-22 09:41:11,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:11,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:11,221 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 09:41:11,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085737724] [2020-12-22 09:41:11,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:11,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:41:11,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897294811] [2020-12-22 09:41:11,223 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:41:11,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:11,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:41:11,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:41:11,224 INFO L87 Difference]: Start difference. First operand 1094 states and 1940 transitions. Second operand 3 states. [2020-12-22 09:41:11,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:11,274 INFO L93 Difference]: Finished difference Result 1654 states and 2774 transitions. [2020-12-22 09:41:11,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:41:11,274 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 43 [2020-12-22 09:41:11,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:11,282 INFO L225 Difference]: With dead ends: 1654 [2020-12-22 09:41:11,282 INFO L226 Difference]: Without dead ends: 1338 [2020-12-22 09:41:11,283 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 09:41:11,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1338 states. [2020-12-22 09:41:11,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1338 to 1336. [2020-12-22 09:41:11,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1336 states. [2020-12-22 09:41:11,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1336 states to 1336 states and 2284 transitions. [2020-12-22 09:41:11,328 INFO L78 Accepts]: Start accepts. Automaton has 1336 states and 2284 transitions. Word has length 43 [2020-12-22 09:41:11,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:11,328 INFO L481 AbstractCegarLoop]: Abstraction has 1336 states and 2284 transitions. [2020-12-22 09:41:11,328 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:41:11,328 INFO L276 IsEmpty]: Start isEmpty. Operand 1336 states and 2284 transitions. [2020-12-22 09:41:11,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-22 09:41:11,329 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:11,329 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 09:41:11,329 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 09:41:11,329 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:11,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:11,330 INFO L82 PathProgramCache]: Analyzing trace with hash -1511296967, now seen corresponding path program 1 times [2020-12-22 09:41:11,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:11,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029664828] [2020-12-22 09:41:11,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:11,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:11,427 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 09:41:11,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029664828] [2020-12-22 09:41:11,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:11,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 09:41:11,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834025960] [2020-12-22 09:41:11,429 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 09:41:11,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:11,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 09:41:11,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:41:11,430 INFO L87 Difference]: Start difference. First operand 1336 states and 2284 transitions. Second operand 8 states. [2020-12-22 09:41:11,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:11,668 INFO L93 Difference]: Finished difference Result 1843 states and 2996 transitions. [2020-12-22 09:41:11,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 09:41:11,669 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 44 [2020-12-22 09:41:11,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:11,678 INFO L225 Difference]: With dead ends: 1843 [2020-12-22 09:41:11,679 INFO L226 Difference]: Without dead ends: 1841 [2020-12-22 09:41:11,680 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 09:41:11,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1841 states. [2020-12-22 09:41:11,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1841 to 1384. [2020-12-22 09:41:11,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1384 states. [2020-12-22 09:41:11,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1384 states to 1384 states and 2328 transitions. [2020-12-22 09:41:11,746 INFO L78 Accepts]: Start accepts. Automaton has 1384 states and 2328 transitions. Word has length 44 [2020-12-22 09:41:11,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:11,746 INFO L481 AbstractCegarLoop]: Abstraction has 1384 states and 2328 transitions. [2020-12-22 09:41:11,746 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 09:41:11,747 INFO L276 IsEmpty]: Start isEmpty. Operand 1384 states and 2328 transitions. [2020-12-22 09:41:11,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-22 09:41:11,749 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:11,749 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:41:11,750 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 09:41:11,750 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:11,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:11,750 INFO L82 PathProgramCache]: Analyzing trace with hash -1037650968, now seen corresponding path program 1 times [2020-12-22 09:41:11,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:11,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013311638] [2020-12-22 09:41:11,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:11,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:11,921 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 09:41:11,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013311638] [2020-12-22 09:41:11,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:11,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:41:11,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867171637] [2020-12-22 09:41:11,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:41:11,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:11,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:41:11,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:41:11,924 INFO L87 Difference]: Start difference. First operand 1384 states and 2328 transitions. Second operand 4 states. [2020-12-22 09:41:22,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:22,380 INFO L93 Difference]: Finished difference Result 3639 states and 6637 transitions. [2020-12-22 09:41:22,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:41:22,383 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 61 [2020-12-22 09:41:22,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:22,398 INFO L225 Difference]: With dead ends: 3639 [2020-12-22 09:41:22,399 INFO L226 Difference]: Without dead ends: 2886 [2020-12-22 09:41:22,402 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:41:22,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2886 states. [2020-12-22 09:41:22,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2886 to 2886. [2020-12-22 09:41:22,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2886 states. [2020-12-22 09:41:22,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2886 states to 2886 states and 4304 transitions. [2020-12-22 09:41:22,514 INFO L78 Accepts]: Start accepts. Automaton has 2886 states and 4304 transitions. Word has length 61 [2020-12-22 09:41:22,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:22,515 INFO L481 AbstractCegarLoop]: Abstraction has 2886 states and 4304 transitions. [2020-12-22 09:41:22,515 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:41:22,515 INFO L276 IsEmpty]: Start isEmpty. Operand 2886 states and 4304 transitions. [2020-12-22 09:41:22,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 09:41:22,517 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:22,517 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 09:41:22,517 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 09:41:22,517 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:22,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:22,518 INFO L82 PathProgramCache]: Analyzing trace with hash -638527781, now seen corresponding path program 1 times [2020-12-22 09:41:22,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:22,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410983476] [2020-12-22 09:41:22,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:22,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:22,627 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 09:41:22,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410983476] [2020-12-22 09:41:22,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:22,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:41:22,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979949821] [2020-12-22 09:41:22,628 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:41:22,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:22,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:41:22,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:41:22,632 INFO L87 Difference]: Start difference. First operand 2886 states and 4304 transitions. Second operand 5 states. [2020-12-22 09:41:22,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:22,891 INFO L93 Difference]: Finished difference Result 4838 states and 7076 transitions. [2020-12-22 09:41:22,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:41:22,892 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2020-12-22 09:41:22,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:22,916 INFO L225 Difference]: With dead ends: 4838 [2020-12-22 09:41:22,916 INFO L226 Difference]: Without dead ends: 4232 [2020-12-22 09:41:22,919 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 09:41:22,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4232 states. [2020-12-22 09:41:23,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4232 to 3490. [2020-12-22 09:41:23,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3490 states. [2020-12-22 09:41:23,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3490 states to 3490 states and 5156 transitions. [2020-12-22 09:41:23,079 INFO L78 Accepts]: Start accepts. Automaton has 3490 states and 5156 transitions. Word has length 63 [2020-12-22 09:41:23,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:23,080 INFO L481 AbstractCegarLoop]: Abstraction has 3490 states and 5156 transitions. [2020-12-22 09:41:23,080 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:41:23,080 INFO L276 IsEmpty]: Start isEmpty. Operand 3490 states and 5156 transitions. [2020-12-22 09:41:23,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 09:41:23,081 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:23,082 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 09:41:23,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 09:41:23,082 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:23,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:23,083 INFO L82 PathProgramCache]: Analyzing trace with hash 608979835, now seen corresponding path program 1 times [2020-12-22 09:41:23,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:23,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127437254] [2020-12-22 09:41:23,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:23,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:23,161 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 09:41:23,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127437254] [2020-12-22 09:41:23,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:23,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:41:23,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894827345] [2020-12-22 09:41:23,162 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:41:23,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:23,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:41:23,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:41:23,163 INFO L87 Difference]: Start difference. First operand 3490 states and 5156 transitions. Second operand 5 states. [2020-12-22 09:41:23,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:23,481 INFO L93 Difference]: Finished difference Result 5442 states and 7928 transitions. [2020-12-22 09:41:23,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:41:23,482 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2020-12-22 09:41:23,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:23,509 INFO L225 Difference]: With dead ends: 5442 [2020-12-22 09:41:23,509 INFO L226 Difference]: Without dead ends: 4836 [2020-12-22 09:41:23,512 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 09:41:23,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4836 states. [2020-12-22 09:41:23,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4836 to 4398. [2020-12-22 09:41:23,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4398 states. [2020-12-22 09:41:23,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4398 states to 4398 states and 6424 transitions. [2020-12-22 09:41:23,741 INFO L78 Accepts]: Start accepts. Automaton has 4398 states and 6424 transitions. Word has length 63 [2020-12-22 09:41:23,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:23,741 INFO L481 AbstractCegarLoop]: Abstraction has 4398 states and 6424 transitions. [2020-12-22 09:41:23,741 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:41:23,741 INFO L276 IsEmpty]: Start isEmpty. Operand 4398 states and 6424 transitions. [2020-12-22 09:41:23,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 09:41:23,743 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:23,743 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:41:23,743 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 09:41:23,743 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:23,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:23,744 INFO L82 PathProgramCache]: Analyzing trace with hash 2078412817, now seen corresponding path program 1 times [2020-12-22 09:41:23,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:23,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870942530] [2020-12-22 09:41:23,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:23,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:23,805 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:41:23,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870942530] [2020-12-22 09:41:23,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:23,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:41:23,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525019730] [2020-12-22 09:41:23,807 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:41:23,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:23,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:41:23,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:41:23,808 INFO L87 Difference]: Start difference. First operand 4398 states and 6424 transitions. Second operand 5 states. [2020-12-22 09:41:24,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:24,106 INFO L93 Difference]: Finished difference Result 5702 states and 8300 transitions. [2020-12-22 09:41:24,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:41:24,107 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2020-12-22 09:41:24,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:24,134 INFO L225 Difference]: With dead ends: 5702 [2020-12-22 09:41:24,134 INFO L226 Difference]: Without dead ends: 5268 [2020-12-22 09:41:24,137 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 09:41:24,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5268 states. [2020-12-22 09:41:24,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5268 to 4830. [2020-12-22 09:41:24,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4830 states. [2020-12-22 09:41:24,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4830 states to 4830 states and 7040 transitions. [2020-12-22 09:41:24,395 INFO L78 Accepts]: Start accepts. Automaton has 4830 states and 7040 transitions. Word has length 63 [2020-12-22 09:41:24,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:24,395 INFO L481 AbstractCegarLoop]: Abstraction has 4830 states and 7040 transitions. [2020-12-22 09:41:24,395 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:41:24,395 INFO L276 IsEmpty]: Start isEmpty. Operand 4830 states and 7040 transitions. [2020-12-22 09:41:24,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:41:24,397 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:24,397 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:41:24,397 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 09:41:24,397 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:24,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:24,398 INFO L82 PathProgramCache]: Analyzing trace with hash 47222752, now seen corresponding path program 1 times [2020-12-22 09:41:24,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:24,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902008655] [2020-12-22 09:41:24,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:24,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:24,444 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:41:24,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902008655] [2020-12-22 09:41:24,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:24,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:41:24,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277160749] [2020-12-22 09:41:24,445 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:41:24,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:24,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:41:24,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:41:24,446 INFO L87 Difference]: Start difference. First operand 4830 states and 7040 transitions. Second operand 3 states. [2020-12-22 09:41:24,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:24,653 INFO L93 Difference]: Finished difference Result 7382 states and 10642 transitions. [2020-12-22 09:41:24,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:41:24,654 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 09:41:24,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:24,666 INFO L225 Difference]: With dead ends: 7382 [2020-12-22 09:41:24,666 INFO L226 Difference]: Without dead ends: 4832 [2020-12-22 09:41:24,671 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 09:41:24,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4832 states. [2020-12-22 09:41:24,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4832 to 4830. [2020-12-22 09:41:24,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4830 states. [2020-12-22 09:41:24,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4830 states to 4830 states and 6990 transitions. [2020-12-22 09:41:24,912 INFO L78 Accepts]: Start accepts. Automaton has 4830 states and 6990 transitions. Word has length 64 [2020-12-22 09:41:24,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:24,912 INFO L481 AbstractCegarLoop]: Abstraction has 4830 states and 6990 transitions. [2020-12-22 09:41:24,912 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:41:24,913 INFO L276 IsEmpty]: Start isEmpty. Operand 4830 states and 6990 transitions. [2020-12-22 09:41:24,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:41:24,914 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:24,914 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:41:24,914 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 09:41:24,914 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:24,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:24,915 INFO L82 PathProgramCache]: Analyzing trace with hash -39896042, now seen corresponding path program 1 times [2020-12-22 09:41:24,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:24,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256855673] [2020-12-22 09:41:24,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:24,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:24,962 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 09:41:24,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256855673] [2020-12-22 09:41:24,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:24,963 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:41:24,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900393062] [2020-12-22 09:41:24,963 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:41:24,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:24,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:41:24,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:41:24,964 INFO L87 Difference]: Start difference. First operand 4830 states and 6990 transitions. Second operand 3 states. [2020-12-22 09:41:25,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:25,152 INFO L93 Difference]: Finished difference Result 6108 states and 8767 transitions. [2020-12-22 09:41:25,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:41:25,153 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 09:41:25,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:25,161 INFO L225 Difference]: With dead ends: 6108 [2020-12-22 09:41:25,162 INFO L226 Difference]: Without dead ends: 3558 [2020-12-22 09:41:25,165 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 09:41:25,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3558 states. [2020-12-22 09:41:25,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3558 to 3556. [2020-12-22 09:41:25,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3556 states. [2020-12-22 09:41:25,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3556 states to 3556 states and 5190 transitions. [2020-12-22 09:41:25,305 INFO L78 Accepts]: Start accepts. Automaton has 3556 states and 5190 transitions. Word has length 64 [2020-12-22 09:41:25,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:25,305 INFO L481 AbstractCegarLoop]: Abstraction has 3556 states and 5190 transitions. [2020-12-22 09:41:25,306 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:41:25,306 INFO L276 IsEmpty]: Start isEmpty. Operand 3556 states and 5190 transitions. [2020-12-22 09:41:25,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:41:25,307 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:25,307 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] [2020-12-22 09:41:25,307 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 09:41:25,307 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:25,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:25,308 INFO L82 PathProgramCache]: Analyzing trace with hash -1159171252, now seen corresponding path program 1 times [2020-12-22 09:41:25,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:25,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983979315] [2020-12-22 09:41:25,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:25,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:25,523 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 09:41:25,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983979315] [2020-12-22 09:41:25,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067016808] [2020-12-22 09:41:25,524 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 09:41:25,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:25,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 09:41:25,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:41:25,960 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 09:41:25,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:41:25,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4] total 12 [2020-12-22 09:41:25,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112932858] [2020-12-22 09:41:25,962 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 09:41:25,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:25,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 09:41:25,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-12-22 09:41:25,963 INFO L87 Difference]: Start difference. First operand 3556 states and 5190 transitions. Second operand 12 states. [2020-12-22 09:41:28,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:28,648 INFO L93 Difference]: Finished difference Result 9947 states and 13894 transitions. [2020-12-22 09:41:28,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 09:41:28,649 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 64 [2020-12-22 09:41:28,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:28,669 INFO L225 Difference]: With dead ends: 9947 [2020-12-22 09:41:28,669 INFO L226 Difference]: Without dead ends: 8973 [2020-12-22 09:41:28,674 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=398, Invalid=1494, Unknown=0, NotChecked=0, Total=1892 [2020-12-22 09:41:28,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8973 states. [2020-12-22 09:41:29,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8973 to 6690. [2020-12-22 09:41:29,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6690 states. [2020-12-22 09:41:29,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6690 states to 6690 states and 9377 transitions. [2020-12-22 09:41:29,280 INFO L78 Accepts]: Start accepts. Automaton has 6690 states and 9377 transitions. Word has length 64 [2020-12-22 09:41:29,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:29,281 INFO L481 AbstractCegarLoop]: Abstraction has 6690 states and 9377 transitions. [2020-12-22 09:41:29,281 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 09:41:29,281 INFO L276 IsEmpty]: Start isEmpty. Operand 6690 states and 9377 transitions. [2020-12-22 09:41:29,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 09:41:29,282 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:29,282 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 09:41:29,495 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-22 09:41:29,496 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:29,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:29,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1862030833, now seen corresponding path program 1 times [2020-12-22 09:41:29,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:29,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066095332] [2020-12-22 09:41:29,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:29,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:29,753 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 09:41:29,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066095332] [2020-12-22 09:41:29,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012002255] [2020-12-22 09:41:29,753 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 09:41:29,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:29,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 09:41:29,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:41:30,004 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:41:30,285 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 09:41:30,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:41:30,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:41:30,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565036426] [2020-12-22 09:41:30,286 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:41:30,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:30,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:41:30,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:41:30,287 INFO L87 Difference]: Start difference. First operand 6690 states and 9377 transitions. Second operand 17 states. [2020-12-22 09:41:32,674 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2020-12-22 09:41:35,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:35,139 INFO L93 Difference]: Finished difference Result 28970 states and 39115 transitions. [2020-12-22 09:41:35,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 09:41:35,140 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 65 [2020-12-22 09:41:35,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:35,187 INFO L225 Difference]: With dead ends: 28970 [2020-12-22 09:41:35,188 INFO L226 Difference]: Without dead ends: 24560 [2020-12-22 09:41:35,201 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=578, Invalid=1678, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 09:41:35,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24560 states. [2020-12-22 09:41:36,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24560 to 11970. [2020-12-22 09:41:36,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11970 states. [2020-12-22 09:41:36,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11970 states to 11970 states and 16285 transitions. [2020-12-22 09:41:36,452 INFO L78 Accepts]: Start accepts. Automaton has 11970 states and 16285 transitions. Word has length 65 [2020-12-22 09:41:36,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:36,453 INFO L481 AbstractCegarLoop]: Abstraction has 11970 states and 16285 transitions. [2020-12-22 09:41:36,453 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:41:36,453 INFO L276 IsEmpty]: Start isEmpty. Operand 11970 states and 16285 transitions. [2020-12-22 09:41:36,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 09:41:36,455 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:36,455 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 09:41:36,669 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 09:41:36,670 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:36,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:36,671 INFO L82 PathProgramCache]: Analyzing trace with hash 664153647, now seen corresponding path program 1 times [2020-12-22 09:41:36,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:36,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614253377] [2020-12-22 09:41:36,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:36,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:36,867 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 09:41:36,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614253377] [2020-12-22 09:41:36,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325716737] [2020-12-22 09:41:36,868 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 09:41:36,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:36,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-22 09:41:36,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:41:37,145 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:41:37,462 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 09:41:37,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:41:37,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2020-12-22 09:41:37,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781858141] [2020-12-22 09:41:37,463 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 09:41:37,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:37,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 09:41:37,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2020-12-22 09:41:37,465 INFO L87 Difference]: Start difference. First operand 11970 states and 16285 transitions. Second operand 18 states. [2020-12-22 09:41:42,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:42,170 INFO L93 Difference]: Finished difference Result 53066 states and 69923 transitions. [2020-12-22 09:41:42,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 09:41:42,171 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 65 [2020-12-22 09:41:42,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:42,260 INFO L225 Difference]: With dead ends: 53066 [2020-12-22 09:41:42,261 INFO L226 Difference]: Without dead ends: 43376 [2020-12-22 09:41:42,282 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=362, Invalid=1044, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 09:41:42,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43376 states. [2020-12-22 09:41:45,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43376 to 28724. [2020-12-22 09:41:45,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28724 states. [2020-12-22 09:41:45,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28724 states to 28724 states and 38031 transitions. [2020-12-22 09:41:45,311 INFO L78 Accepts]: Start accepts. Automaton has 28724 states and 38031 transitions. Word has length 65 [2020-12-22 09:41:45,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:45,311 INFO L481 AbstractCegarLoop]: Abstraction has 28724 states and 38031 transitions. [2020-12-22 09:41:45,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 09:41:45,312 INFO L276 IsEmpty]: Start isEmpty. Operand 28724 states and 38031 transitions. [2020-12-22 09:41:45,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 09:41:45,313 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:45,314 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] [2020-12-22 09:41:45,523 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 09:41:45,525 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:45,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:45,526 INFO L82 PathProgramCache]: Analyzing trace with hash -386254747, now seen corresponding path program 1 times [2020-12-22 09:41:45,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:45,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647853892] [2020-12-22 09:41:45,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:45,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:45,593 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 09:41:45,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647853892] [2020-12-22 09:41:45,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:45,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:41:45,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525903310] [2020-12-22 09:41:45,596 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:41:45,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:45,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:41:45,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:41:45,597 INFO L87 Difference]: Start difference. First operand 28724 states and 38031 transitions. Second operand 3 states. [2020-12-22 09:41:46,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:46,952 INFO L93 Difference]: Finished difference Result 40182 states and 53023 transitions. [2020-12-22 09:41:46,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:41:46,952 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2020-12-22 09:41:46,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:46,982 INFO L225 Difference]: With dead ends: 40182 [2020-12-22 09:41:46,982 INFO L226 Difference]: Without dead ends: 13738 [2020-12-22 09:41:47,013 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 09:41:47,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13738 states. [2020-12-22 09:41:48,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13738 to 12861. [2020-12-22 09:41:48,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12861 states. [2020-12-22 09:41:48,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12861 states to 12861 states and 17055 transitions. [2020-12-22 09:41:48,188 INFO L78 Accepts]: Start accepts. Automaton has 12861 states and 17055 transitions. Word has length 65 [2020-12-22 09:41:48,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:48,188 INFO L481 AbstractCegarLoop]: Abstraction has 12861 states and 17055 transitions. [2020-12-22 09:41:48,188 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:41:48,188 INFO L276 IsEmpty]: Start isEmpty. Operand 12861 states and 17055 transitions. [2020-12-22 09:41:48,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 09:41:48,190 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:48,190 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 09:41:48,190 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 09:41:48,190 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:48,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:48,191 INFO L82 PathProgramCache]: Analyzing trace with hash 1828535725, now seen corresponding path program 1 times [2020-12-22 09:41:48,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:48,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514463613] [2020-12-22 09:41:48,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:48,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:48,259 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 09:41:48,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514463613] [2020-12-22 09:41:48,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:48,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:41:48,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970683220] [2020-12-22 09:41:48,260 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:41:48,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:48,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:41:48,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:41:48,261 INFO L87 Difference]: Start difference. First operand 12861 states and 17055 transitions. Second operand 6 states. [2020-12-22 09:41:49,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:49,518 INFO L93 Difference]: Finished difference Result 21652 states and 28428 transitions. [2020-12-22 09:41:49,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:41:49,519 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-12-22 09:41:49,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:49,537 INFO L225 Difference]: With dead ends: 21652 [2020-12-22 09:41:49,538 INFO L226 Difference]: Without dead ends: 11144 [2020-12-22 09:41:49,551 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 09:41:49,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11144 states. [2020-12-22 09:41:50,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11144 to 11144. [2020-12-22 09:41:50,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11144 states. [2020-12-22 09:41:50,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11144 states to 11144 states and 14618 transitions. [2020-12-22 09:41:50,860 INFO L78 Accepts]: Start accepts. Automaton has 11144 states and 14618 transitions. Word has length 65 [2020-12-22 09:41:50,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:50,860 INFO L481 AbstractCegarLoop]: Abstraction has 11144 states and 14618 transitions. [2020-12-22 09:41:50,860 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:41:50,860 INFO L276 IsEmpty]: Start isEmpty. Operand 11144 states and 14618 transitions. [2020-12-22 09:41:50,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 09:41:50,862 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:50,862 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 09:41:50,862 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 09:41:50,862 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:50,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:50,863 INFO L82 PathProgramCache]: Analyzing trace with hash 269786861, now seen corresponding path program 1 times [2020-12-22 09:41:50,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:50,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464260091] [2020-12-22 09:41:50,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:50,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:50,919 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 09:41:50,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464260091] [2020-12-22 09:41:50,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:50,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:41:50,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756493652] [2020-12-22 09:41:50,920 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:41:50,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:50,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:41:50,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:41:50,921 INFO L87 Difference]: Start difference. First operand 11144 states and 14618 transitions. Second operand 6 states. [2020-12-22 09:41:51,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:51,550 INFO L93 Difference]: Finished difference Result 17701 states and 22934 transitions. [2020-12-22 09:41:51,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:41:51,550 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-12-22 09:41:51,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:51,563 INFO L225 Difference]: With dead ends: 17701 [2020-12-22 09:41:51,564 INFO L226 Difference]: Without dead ends: 8948 [2020-12-22 09:41:51,572 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 09:41:51,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8948 states. [2020-12-22 09:41:52,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8948 to 8948. [2020-12-22 09:41:52,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8948 states. [2020-12-22 09:41:52,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8948 states to 8948 states and 11706 transitions. [2020-12-22 09:41:52,616 INFO L78 Accepts]: Start accepts. Automaton has 8948 states and 11706 transitions. Word has length 65 [2020-12-22 09:41:52,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:52,616 INFO L481 AbstractCegarLoop]: Abstraction has 8948 states and 11706 transitions. [2020-12-22 09:41:52,616 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:41:52,616 INFO L276 IsEmpty]: Start isEmpty. Operand 8948 states and 11706 transitions. [2020-12-22 09:41:52,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 09:41:52,618 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:52,618 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 09:41:52,618 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 09:41:52,619 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:52,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:52,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1061129165, now seen corresponding path program 1 times [2020-12-22 09:41:52,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:52,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454359128] [2020-12-22 09:41:52,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:52,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:52,678 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 09:41:52,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454359128] [2020-12-22 09:41:52,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:52,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:41:52,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118049109] [2020-12-22 09:41:52,680 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:41:52,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:52,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:41:52,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:41:52,694 INFO L87 Difference]: Start difference. First operand 8948 states and 11706 transitions. Second operand 6 states. [2020-12-22 09:41:53,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:53,341 INFO L93 Difference]: Finished difference Result 14114 states and 18179 transitions. [2020-12-22 09:41:53,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:41:53,344 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-12-22 09:41:53,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:53,353 INFO L225 Difference]: With dead ends: 14114 [2020-12-22 09:41:53,353 INFO L226 Difference]: Without dead ends: 7481 [2020-12-22 09:41:53,359 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 09:41:53,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7481 states. [2020-12-22 09:41:53,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7481 to 7481. [2020-12-22 09:41:53,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7481 states. [2020-12-22 09:41:53,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7481 states to 7481 states and 9837 transitions. [2020-12-22 09:41:53,926 INFO L78 Accepts]: Start accepts. Automaton has 7481 states and 9837 transitions. Word has length 65 [2020-12-22 09:41:53,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:53,926 INFO L481 AbstractCegarLoop]: Abstraction has 7481 states and 9837 transitions. [2020-12-22 09:41:53,927 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:41:53,927 INFO L276 IsEmpty]: Start isEmpty. Operand 7481 states and 9837 transitions. [2020-12-22 09:41:53,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:41:53,928 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:53,928 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] [2020-12-22 09:41:53,928 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 09:41:53,929 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:53,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:53,929 INFO L82 PathProgramCache]: Analyzing trace with hash 695787833, now seen corresponding path program 1 times [2020-12-22 09:41:53,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:53,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714318052] [2020-12-22 09:41:53,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:53,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:54,936 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 09:41:54,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714318052] [2020-12-22 09:41:54,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132367816] [2020-12-22 09:41:54,937 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 09:41:55,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:55,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-22 09:41:55,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:41:55,800 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:41:56,222 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:41:56,240 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:41:56,241 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:41:56,246 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:41:56,894 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 09:41:56,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:41:56,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 18] total 39 [2020-12-22 09:41:56,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47047764] [2020-12-22 09:41:56,895 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-22 09:41:56,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:56,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-22 09:41:56,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1370, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 09:41:56,897 INFO L87 Difference]: Start difference. First operand 7481 states and 9837 transitions. Second operand 39 states. [2020-12-22 09:41:57,189 WARN L197 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2020-12-22 09:41:58,422 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 38 [2020-12-22 09:41:58,698 WARN L197 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2020-12-22 09:41:58,972 WARN L197 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2020-12-22 09:41:59,291 WARN L197 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 56 [2020-12-22 09:41:59,612 WARN L197 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 60 [2020-12-22 09:41:59,864 WARN L197 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 57 [2020-12-22 09:42:00,140 WARN L197 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 57 [2020-12-22 09:42:00,377 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 48 [2020-12-22 09:42:00,645 WARN L197 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2020-12-22 09:42:04,202 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 33 [2020-12-22 09:42:04,617 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 42 [2020-12-22 09:42:04,984 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2020-12-22 09:42:05,610 WARN L197 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 55 [2020-12-22 09:42:05,909 WARN L197 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 53 [2020-12-22 09:42:06,131 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2020-12-22 09:42:06,302 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2020-12-22 09:42:06,465 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2020-12-22 09:42:06,723 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2020-12-22 09:42:08,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:42:08,049 INFO L93 Difference]: Finished difference Result 11074 states and 14348 transitions. [2020-12-22 09:42:08,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-12-22 09:42:08,050 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 66 [2020-12-22 09:42:08,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:42:08,062 INFO L225 Difference]: With dead ends: 11074 [2020-12-22 09:42:08,062 INFO L226 Difference]: Without dead ends: 9204 [2020-12-22 09:42:08,069 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1961 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=1370, Invalid=7560, Unknown=0, NotChecked=0, Total=8930 [2020-12-22 09:42:08,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9204 states. [2020-12-22 09:42:08,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9204 to 7370. [2020-12-22 09:42:08,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7370 states. [2020-12-22 09:42:08,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7370 states to 7370 states and 9735 transitions. [2020-12-22 09:42:08,659 INFO L78 Accepts]: Start accepts. Automaton has 7370 states and 9735 transitions. Word has length 66 [2020-12-22 09:42:08,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:42:08,659 INFO L481 AbstractCegarLoop]: Abstraction has 7370 states and 9735 transitions. [2020-12-22 09:42:08,659 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-22 09:42:08,659 INFO L276 IsEmpty]: Start isEmpty. Operand 7370 states and 9735 transitions. [2020-12-22 09:42:08,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:42:08,660 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:42:08,660 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] [2020-12-22 09:42:08,860 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:42:08,864 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:42:08,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:42:08,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1166524545, now seen corresponding path program 1 times [2020-12-22 09:42:08,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:42:08,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174038904] [2020-12-22 09:42:08,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:42:08,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:42:09,853 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 09:42:09,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174038904] [2020-12-22 09:42:09,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952145275] [2020-12-22 09:42:09,853 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 09:42:10,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:42:10,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-22 09:42:10,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:42:11,911 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2020-12-22 09:42:11,928 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 2, 1] term [2020-12-22 09:42:11,928 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:42:11,930 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 09:42:12,476 WARN L197 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 46