/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.7.ufo.UNBOUNDED.pals+Problem12_label03.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 10:15:43,885 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 10:15:43,889 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 10:15:43,950 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 10:15:43,951 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 10:15:43,955 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 10:15:43,959 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 10:15:43,968 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 10:15:43,972 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 10:15:43,978 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 10:15:43,979 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 10:15:43,981 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 10:15:43,982 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 10:15:43,985 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 10:15:43,988 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 10:15:44,005 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 10:15:44,007 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 10:15:44,010 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 10:15:44,018 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 10:15:44,027 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 10:15:44,029 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 10:15:44,031 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 10:15:44,033 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 10:15:44,036 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 10:15:44,045 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 10:15:44,058 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 10:15:44,059 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 10:15:44,059 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 10:15:44,065 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 10:15:44,117 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 10:15:44,117 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 10:15:44,121 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 10:15:44,122 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 10:15:44,122 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 10:15:44,122 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 10:15:44,123 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 10:15:44,123 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 10:15:44,123 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 10:15:44,124 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 10:15:44,125 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 10:15:44,125 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 10:15:44,125 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 10:15:44,125 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 10:15:44,126 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 10:15:44,126 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 10:15:44,126 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 10:15:44,126 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 10:15:44,127 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 10:15:44,127 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 10:15:44,127 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 10:15:44,128 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 10:15:44,128 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 10:15:44,128 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 10:15:44,128 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 10:15:44,128 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 10:15:44,581 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 10:15:44,611 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 10:15:44,615 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 10:15:44,616 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 10:15:44,617 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 10:15:44,618 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.7.ufo.UNBOUNDED.pals+Problem12_label03.c [2020-12-22 10:15:44,727 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bca4ad329/907a2ad8562c4abf973067a0c0c725b7/FLAG8c8866e4e [2020-12-22 10:15:45,955 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 10:15:45,956 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.7.ufo.UNBOUNDED.pals+Problem12_label03.c [2020-12-22 10:15:45,991 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bca4ad329/907a2ad8562c4abf973067a0c0c725b7/FLAG8c8866e4e [2020-12-22 10:15:46,332 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bca4ad329/907a2ad8562c4abf973067a0c0c725b7 [2020-12-22 10:15:46,336 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 10:15:46,339 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 10:15:46,341 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 10:15:46,342 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 10:15:46,346 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 10:15:46,348 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:15:46" (1/1) ... [2020-12-22 10:15:46,349 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4abd3f16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:15:46, skipping insertion in model container [2020-12-22 10:15:46,350 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:15:46" (1/1) ... [2020-12-22 10:15:46,358 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 10:15:46,517 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 10:15:46,908 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.7.ufo.UNBOUNDED.pals+Problem12_label03.c[20572,20585] [2020-12-22 10:15:46,950 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.7.ufo.UNBOUNDED.pals+Problem12_label03.c[22666,22679] [2020-12-22 10:15:47,940 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:15:47,959 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 10:15:48,062 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.7.ufo.UNBOUNDED.pals+Problem12_label03.c[20572,20585] [2020-12-22 10:15:48,073 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.7.ufo.UNBOUNDED.pals+Problem12_label03.c[22666,22679] [2020-12-22 10:15:48,753 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:15:48,805 INFO L208 MainTranslator]: Completed translation [2020-12-22 10:15:48,806 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:15:48 WrapperNode [2020-12-22 10:15:48,807 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 10:15:48,809 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 10:15:48,810 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 10:15:48,810 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 10:15:48,848 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:15:48" (1/1) ... [2020-12-22 10:15:48,940 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:15:48" (1/1) ... [2020-12-22 10:15:49,368 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 10:15:49,370 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 10:15:49,370 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 10:15:49,370 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 10:15:49,379 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:15:48" (1/1) ... [2020-12-22 10:15:49,380 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:15:48" (1/1) ... [2020-12-22 10:15:49,427 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:15:48" (1/1) ... [2020-12-22 10:15:49,428 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:15:48" (1/1) ... [2020-12-22 10:15:49,746 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:15:48" (1/1) ... [2020-12-22 10:15:49,777 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:15:48" (1/1) ... [2020-12-22 10:15:49,930 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:15:48" (1/1) ... [2020-12-22 10:15:50,051 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 10:15:50,054 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 10:15:50,054 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 10:15:50,054 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 10:15:50,055 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:15:48" (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 10:15:50,177 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 10:15:50,177 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 10:15:50,178 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 10:15:50,178 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 10:15:55,942 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 10:15:55,943 INFO L299 CfgBuilder]: Removed 40 assume(true) statements. [2020-12-22 10:15:55,949 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:15:55 BoogieIcfgContainer [2020-12-22 10:15:55,949 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 10:15:55,952 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 10:15:55,952 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 10:15:55,956 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 10:15:55,956 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 10:15:46" (1/3) ... [2020-12-22 10:15:55,957 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e14d42e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:15:55, skipping insertion in model container [2020-12-22 10:15:55,958 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:15:48" (2/3) ... [2020-12-22 10:15:55,958 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e14d42e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:15:55, skipping insertion in model container [2020-12-22 10:15:55,959 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:15:55" (3/3) ... [2020-12-22 10:15:55,961 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.7.ufo.UNBOUNDED.pals+Problem12_label03.c [2020-12-22 10:15:55,970 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 10:15:55,977 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 10:15:56,002 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 10:15:56,054 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 10:15:56,054 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 10:15:56,055 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 10:15:56,055 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 10:15:56,058 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 10:15:56,059 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 10:15:56,059 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 10:15:56,059 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 10:15:56,153 INFO L276 IsEmpty]: Start isEmpty. Operand 945 states. [2020-12-22 10:15:56,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-22 10:15:56,163 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:15:56,164 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:15:56,165 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:15:56,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:15:56,172 INFO L82 PathProgramCache]: Analyzing trace with hash -195567355, now seen corresponding path program 1 times [2020-12-22 10:15:56,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:15:56,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952044025] [2020-12-22 10:15:56,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:15:56,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:15:56,630 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 10:15:56,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952044025] [2020-12-22 10:15:56,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:15:56,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:15:56,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197699617] [2020-12-22 10:15:56,641 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:15:56,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:15:56,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:15:56,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:15:56,667 INFO L87 Difference]: Start difference. First operand 945 states. Second operand 3 states. [2020-12-22 10:16:03,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:16:03,415 INFO L93 Difference]: Finished difference Result 2603 states and 4984 transitions. [2020-12-22 10:16:03,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:16:03,419 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-12-22 10:16:03,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:16:03,466 INFO L225 Difference]: With dead ends: 2603 [2020-12-22 10:16:03,466 INFO L226 Difference]: Without dead ends: 1630 [2020-12-22 10:16:03,476 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:16:03,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1630 states. [2020-12-22 10:16:03,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1630 to 1630. [2020-12-22 10:16:03,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1630 states. [2020-12-22 10:16:03,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1630 states to 1630 states and 2634 transitions. [2020-12-22 10:16:03,722 INFO L78 Accepts]: Start accepts. Automaton has 1630 states and 2634 transitions. Word has length 20 [2020-12-22 10:16:03,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:16:03,723 INFO L481 AbstractCegarLoop]: Abstraction has 1630 states and 2634 transitions. [2020-12-22 10:16:03,723 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:16:03,724 INFO L276 IsEmpty]: Start isEmpty. Operand 1630 states and 2634 transitions. [2020-12-22 10:16:03,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-22 10:16:03,730 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:16:03,730 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:16:03,731 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 10:16:03,731 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:16:03,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:16:03,736 INFO L82 PathProgramCache]: Analyzing trace with hash -1343709944, now seen corresponding path program 1 times [2020-12-22 10:16:03,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:16:03,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709205241] [2020-12-22 10:16:03,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:16:03,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:16:04,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:16:04,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709205241] [2020-12-22 10:16:04,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:16:04,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:16:04,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102757338] [2020-12-22 10:16:04,014 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 10:16:04,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:16:04,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 10:16:04,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:16:04,017 INFO L87 Difference]: Start difference. First operand 1630 states and 2634 transitions. Second operand 5 states. [2020-12-22 10:16:04,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:16:04,176 INFO L93 Difference]: Finished difference Result 1703 states and 2748 transitions. [2020-12-22 10:16:04,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 10:16:04,177 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 42 [2020-12-22 10:16:04,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:16:04,188 INFO L225 Difference]: With dead ends: 1703 [2020-12-22 10:16:04,189 INFO L226 Difference]: Without dead ends: 1630 [2020-12-22 10:16:04,191 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 10:16:04,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1630 states. [2020-12-22 10:16:04,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1630 to 1630. [2020-12-22 10:16:04,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1630 states. [2020-12-22 10:16:04,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1630 states to 1630 states and 2584 transitions. [2020-12-22 10:16:04,246 INFO L78 Accepts]: Start accepts. Automaton has 1630 states and 2584 transitions. Word has length 42 [2020-12-22 10:16:04,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:16:04,247 INFO L481 AbstractCegarLoop]: Abstraction has 1630 states and 2584 transitions. [2020-12-22 10:16:04,247 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 10:16:04,248 INFO L276 IsEmpty]: Start isEmpty. Operand 1630 states and 2584 transitions. [2020-12-22 10:16:04,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:16:04,260 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:16:04,261 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:16:04,262 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 10:16:04,262 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:16:04,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:16:04,266 INFO L82 PathProgramCache]: Analyzing trace with hash -461668761, now seen corresponding path program 1 times [2020-12-22 10:16:04,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:16:04,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012902896] [2020-12-22 10:16:04,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:16:04,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:16:04,519 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 10:16:04,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012902896] [2020-12-22 10:16:04,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:16:04,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:16:04,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062616594] [2020-12-22 10:16:04,522 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:16:04,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:16:04,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:16:04,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:16:04,535 INFO L87 Difference]: Start difference. First operand 1630 states and 2584 transitions. Second operand 3 states. [2020-12-22 10:16:04,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:16:04,591 INFO L93 Difference]: Finished difference Result 1762 states and 2794 transitions. [2020-12-22 10:16:04,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:16:04,592 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:16:04,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:16:04,603 INFO L225 Difference]: With dead ends: 1762 [2020-12-22 10:16:04,604 INFO L226 Difference]: Without dead ends: 1693 [2020-12-22 10:16:04,606 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 10:16:04,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1693 states. [2020-12-22 10:16:04,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1693 to 1691. [2020-12-22 10:16:04,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1691 states. [2020-12-22 10:16:04,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1691 states to 1691 states and 2682 transitions. [2020-12-22 10:16:04,677 INFO L78 Accepts]: Start accepts. Automaton has 1691 states and 2682 transitions. Word has length 91 [2020-12-22 10:16:04,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:16:04,678 INFO L481 AbstractCegarLoop]: Abstraction has 1691 states and 2682 transitions. [2020-12-22 10:16:04,678 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:16:04,679 INFO L276 IsEmpty]: Start isEmpty. Operand 1691 states and 2682 transitions. [2020-12-22 10:16:04,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:16:04,681 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:16:04,681 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:16:04,681 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 10:16:04,681 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:16:04,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:16:04,682 INFO L82 PathProgramCache]: Analyzing trace with hash -1207251491, now seen corresponding path program 1 times [2020-12-22 10:16:04,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:16:04,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933857336] [2020-12-22 10:16:04,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:16:04,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:16:04,841 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 10:16:04,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933857336] [2020-12-22 10:16:04,843 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:16:04,843 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:16:04,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643198033] [2020-12-22 10:16:04,844 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:16:04,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:16:04,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:16:04,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:16:04,846 INFO L87 Difference]: Start difference. First operand 1691 states and 2682 transitions. Second operand 3 states. [2020-12-22 10:16:04,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:16:04,910 INFO L93 Difference]: Finished difference Result 1939 states and 3078 transitions. [2020-12-22 10:16:04,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:16:04,911 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:16:04,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:16:04,925 INFO L225 Difference]: With dead ends: 1939 [2020-12-22 10:16:04,925 INFO L226 Difference]: Without dead ends: 1809 [2020-12-22 10:16:04,928 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:16:04,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1809 states. [2020-12-22 10:16:04,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1809 to 1807. [2020-12-22 10:16:04,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1807 states. [2020-12-22 10:16:04,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1807 states to 1807 states and 2867 transitions. [2020-12-22 10:16:04,996 INFO L78 Accepts]: Start accepts. Automaton has 1807 states and 2867 transitions. Word has length 91 [2020-12-22 10:16:04,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:16:04,999 INFO L481 AbstractCegarLoop]: Abstraction has 1807 states and 2867 transitions. [2020-12-22 10:16:04,999 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:16:05,000 INFO L276 IsEmpty]: Start isEmpty. Operand 1807 states and 2867 transitions. [2020-12-22 10:16:05,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:16:05,002 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:16:05,002 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:16:05,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 10:16:05,003 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:16:05,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:16:05,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1147684947, now seen corresponding path program 1 times [2020-12-22 10:16:05,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:16:05,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016431329] [2020-12-22 10:16:05,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:16:05,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:16:05,159 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 10:16:05,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016431329] [2020-12-22 10:16:05,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:16:05,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:16:05,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931328986] [2020-12-22 10:16:05,161 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:16:05,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:16:05,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:16:05,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:16:05,163 INFO L87 Difference]: Start difference. First operand 1807 states and 2867 transitions. Second operand 3 states. [2020-12-22 10:16:05,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:16:05,227 INFO L93 Difference]: Finished difference Result 2275 states and 3613 transitions. [2020-12-22 10:16:05,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:16:05,228 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:16:05,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:16:05,242 INFO L225 Difference]: With dead ends: 2275 [2020-12-22 10:16:05,242 INFO L226 Difference]: Without dead ends: 2029 [2020-12-22 10:16:05,244 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 10:16:05,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2029 states. [2020-12-22 10:16:05,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2029 to 2027. [2020-12-22 10:16:05,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2027 states. [2020-12-22 10:16:05,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2027 states to 2027 states and 3215 transitions. [2020-12-22 10:16:05,329 INFO L78 Accepts]: Start accepts. Automaton has 2027 states and 3215 transitions. Word has length 91 [2020-12-22 10:16:05,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:16:05,330 INFO L481 AbstractCegarLoop]: Abstraction has 2027 states and 3215 transitions. [2020-12-22 10:16:05,330 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:16:05,330 INFO L276 IsEmpty]: Start isEmpty. Operand 2027 states and 3215 transitions. [2020-12-22 10:16:05,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:16:05,339 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:16:05,340 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:16:05,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 10:16:05,340 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:16:05,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:16:05,341 INFO L82 PathProgramCache]: Analyzing trace with hash -446599735, now seen corresponding path program 1 times [2020-12-22 10:16:05,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:16:05,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849824140] [2020-12-22 10:16:05,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:16:05,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:16:05,502 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 10:16:05,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849824140] [2020-12-22 10:16:05,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:16:05,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:16:05,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107196573] [2020-12-22 10:16:05,504 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:16:05,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:16:05,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:16:05,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:16:05,505 INFO L87 Difference]: Start difference. First operand 2027 states and 3215 transitions. Second operand 3 states. [2020-12-22 10:16:05,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:16:05,573 INFO L93 Difference]: Finished difference Result 2911 states and 4617 transitions. [2020-12-22 10:16:05,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:16:05,574 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:16:05,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:16:05,593 INFO L225 Difference]: With dead ends: 2911 [2020-12-22 10:16:05,593 INFO L226 Difference]: Without dead ends: 2445 [2020-12-22 10:16:05,596 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 10:16:05,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2445 states. [2020-12-22 10:16:05,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2445 to 2443. [2020-12-22 10:16:05,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2443 states. [2020-12-22 10:16:05,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2443 states to 2443 states and 3867 transitions. [2020-12-22 10:16:05,684 INFO L78 Accepts]: Start accepts. Automaton has 2443 states and 3867 transitions. Word has length 91 [2020-12-22 10:16:05,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:16:05,686 INFO L481 AbstractCegarLoop]: Abstraction has 2443 states and 3867 transitions. [2020-12-22 10:16:05,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:16:05,686 INFO L276 IsEmpty]: Start isEmpty. Operand 2443 states and 3867 transitions. [2020-12-22 10:16:05,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:16:05,688 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:16:05,688 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:16:05,689 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 10:16:05,694 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:16:05,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:16:05,695 INFO L82 PathProgramCache]: Analyzing trace with hash -108806593, now seen corresponding path program 1 times [2020-12-22 10:16:05,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:16:05,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142377892] [2020-12-22 10:16:05,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:16:05,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:16:05,801 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 10:16:05,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142377892] [2020-12-22 10:16:05,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:16:05,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:16:05,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238022923] [2020-12-22 10:16:05,804 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:16:05,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:16:05,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:16:05,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:16:05,805 INFO L87 Difference]: Start difference. First operand 2443 states and 3867 transitions. Second operand 3 states. [2020-12-22 10:16:05,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:16:05,903 INFO L93 Difference]: Finished difference Result 4111 states and 6493 transitions. [2020-12-22 10:16:05,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:16:05,904 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:16:05,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:16:05,923 INFO L225 Difference]: With dead ends: 4111 [2020-12-22 10:16:05,924 INFO L226 Difference]: Without dead ends: 3229 [2020-12-22 10:16:05,928 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:16:05,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3229 states. [2020-12-22 10:16:06,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3229 to 3227. [2020-12-22 10:16:06,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3227 states. [2020-12-22 10:16:06,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3227 states to 3227 states and 5083 transitions. [2020-12-22 10:16:06,111 INFO L78 Accepts]: Start accepts. Automaton has 3227 states and 5083 transitions. Word has length 91 [2020-12-22 10:16:06,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:16:06,112 INFO L481 AbstractCegarLoop]: Abstraction has 3227 states and 5083 transitions. [2020-12-22 10:16:06,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:16:06,112 INFO L276 IsEmpty]: Start isEmpty. Operand 3227 states and 5083 transitions. [2020-12-22 10:16:06,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:16:06,113 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:16:06,113 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:16:06,114 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 10:16:06,114 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:16:06,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:16:06,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1109178805, now seen corresponding path program 1 times [2020-12-22 10:16:06,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:16:06,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641961150] [2020-12-22 10:16:06,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:16:06,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:16:06,282 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 10:16:06,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641961150] [2020-12-22 10:16:06,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:16:06,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:16:06,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533756560] [2020-12-22 10:16:06,283 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:16:06,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:16:06,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:16:06,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:16:06,285 INFO L87 Difference]: Start difference. First operand 3227 states and 5083 transitions. Second operand 9 states. [2020-12-22 10:16:07,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:16:07,747 INFO L93 Difference]: Finished difference Result 26551 states and 41609 transitions. [2020-12-22 10:16:07,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 10:16:07,748 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 91 [2020-12-22 10:16:07,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:16:07,882 INFO L225 Difference]: With dead ends: 26551 [2020-12-22 10:16:07,882 INFO L226 Difference]: Without dead ends: 24885 [2020-12-22 10:16:07,899 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2020-12-22 10:16:07,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24885 states. [2020-12-22 10:16:08,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24885 to 4891. [2020-12-22 10:16:08,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4891 states. [2020-12-22 10:16:08,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4891 states to 4891 states and 7627 transitions. [2020-12-22 10:16:08,631 INFO L78 Accepts]: Start accepts. Automaton has 4891 states and 7627 transitions. Word has length 91 [2020-12-22 10:16:08,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:16:08,632 INFO L481 AbstractCegarLoop]: Abstraction has 4891 states and 7627 transitions. [2020-12-22 10:16:08,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:16:08,632 INFO L276 IsEmpty]: Start isEmpty. Operand 4891 states and 7627 transitions. [2020-12-22 10:16:08,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 10:16:08,633 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:16:08,634 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:16:08,634 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 10:16:08,634 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:16:08,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:16:08,635 INFO L82 PathProgramCache]: Analyzing trace with hash -646747483, now seen corresponding path program 1 times [2020-12-22 10:16:08,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:16:08,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447695007] [2020-12-22 10:16:08,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:16:08,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:16:08,757 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 10:16:08,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447695007] [2020-12-22 10:16:08,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:16:08,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:16:08,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216932906] [2020-12-22 10:16:08,759 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:16:08,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:16:08,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:16:08,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:16:08,760 INFO L87 Difference]: Start difference. First operand 4891 states and 7627 transitions. Second operand 3 states. [2020-12-22 10:16:09,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:16:09,202 INFO L93 Difference]: Finished difference Result 11199 states and 17325 transitions. [2020-12-22 10:16:09,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:16:09,203 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 93 [2020-12-22 10:16:09,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:16:09,226 INFO L225 Difference]: With dead ends: 11199 [2020-12-22 10:16:09,226 INFO L226 Difference]: Without dead ends: 7869 [2020-12-22 10:16:09,234 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 10:16:09,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7869 states. [2020-12-22 10:16:09,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7869 to 7803. [2020-12-22 10:16:09,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7803 states. [2020-12-22 10:16:09,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7803 states to 7803 states and 11947 transitions. [2020-12-22 10:16:09,740 INFO L78 Accepts]: Start accepts. Automaton has 7803 states and 11947 transitions. Word has length 93 [2020-12-22 10:16:09,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:16:09,741 INFO L481 AbstractCegarLoop]: Abstraction has 7803 states and 11947 transitions. [2020-12-22 10:16:09,741 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:16:09,741 INFO L276 IsEmpty]: Start isEmpty. Operand 7803 states and 11947 transitions. [2020-12-22 10:16:09,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 10:16:09,742 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:16:09,743 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:16:09,743 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 10:16:09,743 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:16:09,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:16:09,744 INFO L82 PathProgramCache]: Analyzing trace with hash -580253971, now seen corresponding path program 1 times [2020-12-22 10:16:09,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:16:09,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001452798] [2020-12-22 10:16:09,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:16:09,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:16:10,261 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 10:16:10,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001452798] [2020-12-22 10:16:10,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:16:10,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:16:10,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47726834] [2020-12-22 10:16:10,263 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:16:10,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:16:10,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:16:10,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:16:10,264 INFO L87 Difference]: Start difference. First operand 7803 states and 11947 transitions. Second operand 9 states. [2020-12-22 10:16:11,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:16:11,090 INFO L93 Difference]: Finished difference Result 14047 states and 21421 transitions. [2020-12-22 10:16:11,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:16:11,091 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 93 [2020-12-22 10:16:11,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:16:11,110 INFO L225 Difference]: With dead ends: 14047 [2020-12-22 10:16:11,111 INFO L226 Difference]: Without dead ends: 7805 [2020-12-22 10:16:11,122 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2020-12-22 10:16:11,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7805 states. [2020-12-22 10:16:11,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7805 to 7803. [2020-12-22 10:16:11,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7803 states. [2020-12-22 10:16:11,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7803 states to 7803 states and 11883 transitions. [2020-12-22 10:16:11,579 INFO L78 Accepts]: Start accepts. Automaton has 7803 states and 11883 transitions. Word has length 93 [2020-12-22 10:16:11,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:16:11,580 INFO L481 AbstractCegarLoop]: Abstraction has 7803 states and 11883 transitions. [2020-12-22 10:16:11,580 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:16:11,580 INFO L276 IsEmpty]: Start isEmpty. Operand 7803 states and 11883 transitions. [2020-12-22 10:16:11,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 10:16:11,581 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:16:11,581 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:16:11,582 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 10:16:11,582 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:16:11,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:16:11,582 INFO L82 PathProgramCache]: Analyzing trace with hash -1326262359, now seen corresponding path program 1 times [2020-12-22 10:16:11,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:16:11,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115213669] [2020-12-22 10:16:11,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:16:11,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:16:11,661 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 10:16:11,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115213669] [2020-12-22 10:16:11,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:16:11,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:16:11,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893347522] [2020-12-22 10:16:11,662 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:16:11,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:16:11,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:16:11,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:16:11,663 INFO L87 Difference]: Start difference. First operand 7803 states and 11883 transitions. Second operand 3 states. [2020-12-22 10:16:12,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:16:12,528 INFO L93 Difference]: Finished difference Result 19519 states and 29421 transitions. [2020-12-22 10:16:12,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:16:12,529 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 93 [2020-12-22 10:16:12,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:16:12,568 INFO L225 Difference]: With dead ends: 19519 [2020-12-22 10:16:12,568 INFO L226 Difference]: Without dead ends: 13277 [2020-12-22 10:16:12,584 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 10:16:12,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13277 states. [2020-12-22 10:16:13,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13277 to 13275. [2020-12-22 10:16:13,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13275 states. [2020-12-22 10:16:13,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13275 states to 13275 states and 19883 transitions. [2020-12-22 10:16:13,497 INFO L78 Accepts]: Start accepts. Automaton has 13275 states and 19883 transitions. Word has length 93 [2020-12-22 10:16:13,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:16:13,497 INFO L481 AbstractCegarLoop]: Abstraction has 13275 states and 19883 transitions. [2020-12-22 10:16:13,497 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:16:13,497 INFO L276 IsEmpty]: Start isEmpty. Operand 13275 states and 19883 transitions. [2020-12-22 10:16:13,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 10:16:13,499 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:16:13,499 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:16:13,499 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 10:16:13,499 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:16:13,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:16:13,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1222726774, now seen corresponding path program 1 times [2020-12-22 10:16:13,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:16:13,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655947930] [2020-12-22 10:16:13,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:16:13,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:16:13,647 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 10:16:13,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655947930] [2020-12-22 10:16:13,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:16:13,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:16:13,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856585089] [2020-12-22 10:16:13,649 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:16:13,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:16:13,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:16:13,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:16:13,650 INFO L87 Difference]: Start difference. First operand 13275 states and 19883 transitions. Second operand 8 states. [2020-12-22 10:16:15,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:16:15,178 INFO L93 Difference]: Finished difference Result 22017 states and 32667 transitions. [2020-12-22 10:16:15,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:16:15,178 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 94 [2020-12-22 10:16:15,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:16:15,232 INFO L225 Difference]: With dead ends: 22017 [2020-12-22 10:16:15,232 INFO L226 Difference]: Without dead ends: 22015 [2020-12-22 10:16:15,242 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 10:16:15,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22015 states. [2020-12-22 10:16:16,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22015 to 13659. [2020-12-22 10:16:16,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13659 states. [2020-12-22 10:16:16,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13659 states to 13659 states and 20203 transitions. [2020-12-22 10:16:16,286 INFO L78 Accepts]: Start accepts. Automaton has 13659 states and 20203 transitions. Word has length 94 [2020-12-22 10:16:16,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:16:16,286 INFO L481 AbstractCegarLoop]: Abstraction has 13659 states and 20203 transitions. [2020-12-22 10:16:16,286 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:16:16,286 INFO L276 IsEmpty]: Start isEmpty. Operand 13659 states and 20203 transitions. [2020-12-22 10:16:16,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 10:16:16,289 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:16:16,289 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 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 10:16:16,289 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 10:16:16,290 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:16:16,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:16:16,290 INFO L82 PathProgramCache]: Analyzing trace with hash 434651034, now seen corresponding path program 1 times [2020-12-22 10:16:16,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:16:16,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824233532] [2020-12-22 10:16:16,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:16:16,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:16:16,375 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:16:16,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824233532] [2020-12-22 10:16:16,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:16:16,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:16:16,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869267238] [2020-12-22 10:16:16,376 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:16:16,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:16:16,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:16:16,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:16:16,383 INFO L87 Difference]: Start difference. First operand 13659 states and 20203 transitions. Second operand 3 states. [2020-12-22 10:16:23,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:16:23,119 INFO L93 Difference]: Finished difference Result 16665 states and 25034 transitions. [2020-12-22 10:16:23,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:16:23,120 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 95 [2020-12-22 10:16:23,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:16:23,154 INFO L225 Difference]: With dead ends: 16665 [2020-12-22 10:16:23,155 INFO L226 Difference]: Without dead ends: 15161 [2020-12-22 10:16:23,162 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:16:23,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15161 states. [2020-12-22 10:16:23,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15161 to 15161. [2020-12-22 10:16:23,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15161 states. [2020-12-22 10:16:24,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15161 states to 15161 states and 21909 transitions. [2020-12-22 10:16:24,007 INFO L78 Accepts]: Start accepts. Automaton has 15161 states and 21909 transitions. Word has length 95 [2020-12-22 10:16:24,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:16:24,008 INFO L481 AbstractCegarLoop]: Abstraction has 15161 states and 21909 transitions. [2020-12-22 10:16:24,008 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:16:24,008 INFO L276 IsEmpty]: Start isEmpty. Operand 15161 states and 21909 transitions. [2020-12-22 10:16:24,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 10:16:24,010 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:16:24,010 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:16:24,010 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 10:16:24,010 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:16:24,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:16:24,011 INFO L82 PathProgramCache]: Analyzing trace with hash -362720764, now seen corresponding path program 1 times [2020-12-22 10:16:24,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:16:24,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101525280] [2020-12-22 10:16:24,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:16:24,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:16:24,080 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 10:16:24,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101525280] [2020-12-22 10:16:24,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:16:24,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:16:24,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310139644] [2020-12-22 10:16:24,082 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:16:24,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:16:24,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:16:24,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:16:24,083 INFO L87 Difference]: Start difference. First operand 15161 states and 21909 transitions. Second operand 3 states. [2020-12-22 10:16:25,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:16:25,108 INFO L93 Difference]: Finished difference Result 27456 states and 40091 transitions. [2020-12-22 10:16:25,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:16:25,109 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 95 [2020-12-22 10:16:25,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:16:25,149 INFO L225 Difference]: With dead ends: 27456 [2020-12-22 10:16:25,149 INFO L226 Difference]: Without dead ends: 20797 [2020-12-22 10:16:25,165 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 10:16:25,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20797 states. [2020-12-22 10:16:26,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20797 to 20795. [2020-12-22 10:16:26,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20795 states. [2020-12-22 10:16:26,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20795 states to 20795 states and 30039 transitions. [2020-12-22 10:16:26,252 INFO L78 Accepts]: Start accepts. Automaton has 20795 states and 30039 transitions. Word has length 95 [2020-12-22 10:16:26,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:16:26,253 INFO L481 AbstractCegarLoop]: Abstraction has 20795 states and 30039 transitions. [2020-12-22 10:16:26,253 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:16:26,253 INFO L276 IsEmpty]: Start isEmpty. Operand 20795 states and 30039 transitions. [2020-12-22 10:16:26,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 10:16:26,254 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:16:26,255 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 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 10:16:26,255 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 10:16:26,255 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:16:26,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:16:26,256 INFO L82 PathProgramCache]: Analyzing trace with hash 981440991, now seen corresponding path program 1 times [2020-12-22 10:16:26,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:16:26,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108579463] [2020-12-22 10:16:26,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:16:26,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:16:26,430 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:16:26,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108579463] [2020-12-22 10:16:26,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:16:26,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:16:26,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395297725] [2020-12-22 10:16:26,431 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:16:26,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:16:26,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:16:26,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:16:26,432 INFO L87 Difference]: Start difference. First operand 20795 states and 30039 transitions. Second operand 3 states. [2020-12-22 10:16:33,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:16:33,420 INFO L93 Difference]: Finished difference Result 26807 states and 38283 transitions. [2020-12-22 10:16:33,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:16:33,421 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 97 [2020-12-22 10:16:33,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:16:33,465 INFO L225 Difference]: With dead ends: 26807 [2020-12-22 10:16:33,465 INFO L226 Difference]: Without dead ends: 23801 [2020-12-22 10:16:33,481 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:16:33,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23801 states. [2020-12-22 10:16:34,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23801 to 23799. [2020-12-22 10:16:34,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23799 states. [2020-12-22 10:16:34,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23799 states to 23799 states and 33566 transitions. [2020-12-22 10:16:34,713 INFO L78 Accepts]: Start accepts. Automaton has 23799 states and 33566 transitions. Word has length 97 [2020-12-22 10:16:34,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:16:34,713 INFO L481 AbstractCegarLoop]: Abstraction has 23799 states and 33566 transitions. [2020-12-22 10:16:34,713 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:16:34,713 INFO L276 IsEmpty]: Start isEmpty. Operand 23799 states and 33566 transitions. [2020-12-22 10:16:34,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-22 10:16:34,726 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:16:34,726 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:16:34,727 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 10:16:34,727 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:16:34,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:16:34,727 INFO L82 PathProgramCache]: Analyzing trace with hash 388249298, now seen corresponding path program 1 times [2020-12-22 10:16:34,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:16:34,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749365038] [2020-12-22 10:16:34,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:16:34,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:16:34,916 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-22 10:16:34,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749365038] [2020-12-22 10:16:34,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:16:34,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:16:34,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123838228] [2020-12-22 10:16:34,918 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:16:34,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:16:34,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:16:34,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:16:34,919 INFO L87 Difference]: Start difference. First operand 23799 states and 33566 transitions. Second operand 9 states. [2020-12-22 10:16:41,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:16:41,504 INFO L93 Difference]: Finished difference Result 151367 states and 219430 transitions. [2020-12-22 10:16:41,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:16:41,505 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 129 [2020-12-22 10:16:41,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:16:41,721 INFO L225 Difference]: With dead ends: 151367 [2020-12-22 10:16:41,722 INFO L226 Difference]: Without dead ends: 133637 [2020-12-22 10:16:41,779 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:16:41,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133637 states. [2020-12-22 10:16:45,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133637 to 41527. [2020-12-22 10:16:45,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41527 states. [2020-12-22 10:16:45,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41527 states to 41527 states and 59230 transitions. [2020-12-22 10:16:45,085 INFO L78 Accepts]: Start accepts. Automaton has 41527 states and 59230 transitions. Word has length 129 [2020-12-22 10:16:45,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:16:45,091 INFO L481 AbstractCegarLoop]: Abstraction has 41527 states and 59230 transitions. [2020-12-22 10:16:45,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:16:45,092 INFO L276 IsEmpty]: Start isEmpty. Operand 41527 states and 59230 transitions. [2020-12-22 10:16:45,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-22 10:16:45,107 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:16:45,107 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:16:45,107 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 10:16:45,107 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:16:45,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:16:45,108 INFO L82 PathProgramCache]: Analyzing trace with hash -1380533518, now seen corresponding path program 1 times [2020-12-22 10:16:45,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:16:45,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008185623] [2020-12-22 10:16:45,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:16:45,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:16:45,360 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 10:16:45,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008185623] [2020-12-22 10:16:45,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:16:45,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:16:45,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620893122] [2020-12-22 10:16:45,363 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:16:45,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:16:45,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:16:45,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:16:45,364 INFO L87 Difference]: Start difference. First operand 41527 states and 59230 transitions. Second operand 9 states. [2020-12-22 10:16:54,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:16:54,619 INFO L93 Difference]: Finished difference Result 169095 states and 245094 transitions. [2020-12-22 10:16:54,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:16:54,620 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 129 [2020-12-22 10:16:54,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:16:54,820 INFO L225 Difference]: With dead ends: 169095 [2020-12-22 10:16:54,820 INFO L226 Difference]: Without dead ends: 151365 [2020-12-22 10:16:54,869 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:16:54,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151365 states. [2020-12-22 10:16:59,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151365 to 68151. [2020-12-22 10:16:59,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68151 states. [2020-12-22 10:16:59,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68151 states to 68151 states and 97566 transitions. [2020-12-22 10:16:59,985 INFO L78 Accepts]: Start accepts. Automaton has 68151 states and 97566 transitions. Word has length 129 [2020-12-22 10:16:59,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:16:59,985 INFO L481 AbstractCegarLoop]: Abstraction has 68151 states and 97566 transitions. [2020-12-22 10:16:59,985 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:16:59,985 INFO L276 IsEmpty]: Start isEmpty. Operand 68151 states and 97566 transitions. [2020-12-22 10:17:00,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-22 10:17:00,010 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:17:00,011 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:17:00,011 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 10:17:00,011 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:17:00,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:17:00,012 INFO L82 PathProgramCache]: Analyzing trace with hash -248893678, now seen corresponding path program 1 times [2020-12-22 10:17:00,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:17:00,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137809245] [2020-12-22 10:17:00,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:17:00,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:17:00,191 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-22 10:17:00,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137809245] [2020-12-22 10:17:00,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:17:00,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:17:00,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302894976] [2020-12-22 10:17:00,193 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:17:00,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:17:00,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:17:00,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:17:00,194 INFO L87 Difference]: Start difference. First operand 68151 states and 97566 transitions. Second operand 9 states. [2020-12-22 10:17:10,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:17:10,901 INFO L93 Difference]: Finished difference Result 186823 states and 270758 transitions. [2020-12-22 10:17:10,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:17:10,902 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 129 [2020-12-22 10:17:10,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:17:11,288 INFO L225 Difference]: With dead ends: 186823 [2020-12-22 10:17:11,288 INFO L226 Difference]: Without dead ends: 169093 [2020-12-22 10:17:11,325 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:17:11,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169093 states. [2020-12-22 10:17:17,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169093 to 85879. [2020-12-22 10:17:17,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85879 states. [2020-12-22 10:17:17,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85879 states to 85879 states and 123230 transitions. [2020-12-22 10:17:17,921 INFO L78 Accepts]: Start accepts. Automaton has 85879 states and 123230 transitions. Word has length 129 [2020-12-22 10:17:17,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:17:17,922 INFO L481 AbstractCegarLoop]: Abstraction has 85879 states and 123230 transitions. [2020-12-22 10:17:17,922 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:17:17,922 INFO L276 IsEmpty]: Start isEmpty. Operand 85879 states and 123230 transitions. [2020-12-22 10:17:17,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-22 10:17:17,937 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:17:17,937 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:17:17,937 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 10:17:17,937 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:17:17,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:17:17,938 INFO L82 PathProgramCache]: Analyzing trace with hash -1484352718, now seen corresponding path program 1 times [2020-12-22 10:17:17,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:17:17,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710436717] [2020-12-22 10:17:17,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:17:17,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:17:18,202 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-22 10:17:18,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710436717] [2020-12-22 10:17:18,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:17:18,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:17:18,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844080982] [2020-12-22 10:17:18,204 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:17:18,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:17:18,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:17:18,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:17:18,206 INFO L87 Difference]: Start difference. First operand 85879 states and 123230 transitions. Second operand 9 states. [2020-12-22 10:17:30,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:17:30,872 INFO L93 Difference]: Finished difference Result 204551 states and 296422 transitions. [2020-12-22 10:17:30,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:17:30,872 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 129 [2020-12-22 10:17:30,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:17:31,290 INFO L225 Difference]: With dead ends: 204551 [2020-12-22 10:17:31,290 INFO L226 Difference]: Without dead ends: 186821 [2020-12-22 10:17:31,333 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:17:31,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186821 states. [2020-12-22 10:17:39,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186821 to 103607. [2020-12-22 10:17:39,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103607 states. [2020-12-22 10:17:39,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103607 states to 103607 states and 148894 transitions. [2020-12-22 10:17:39,631 INFO L78 Accepts]: Start accepts. Automaton has 103607 states and 148894 transitions. Word has length 129 [2020-12-22 10:17:39,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:17:39,631 INFO L481 AbstractCegarLoop]: Abstraction has 103607 states and 148894 transitions. [2020-12-22 10:17:39,631 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:17:39,631 INFO L276 IsEmpty]: Start isEmpty. Operand 103607 states and 148894 transitions. [2020-12-22 10:17:39,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-22 10:17:39,642 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:17:39,643 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:17:39,643 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 10:17:39,643 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:17:39,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:17:39,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1389619026, now seen corresponding path program 1 times [2020-12-22 10:17:39,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:17:39,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604401121] [2020-12-22 10:17:39,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:17:39,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:17:39,854 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 10:17:39,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604401121] [2020-12-22 10:17:39,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:17:39,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:17:39,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306141539] [2020-12-22 10:17:39,855 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:17:39,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:17:39,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:17:39,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:17:39,857 INFO L87 Difference]: Start difference. First operand 103607 states and 148894 transitions. Second operand 9 states. [2020-12-22 10:17:55,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:17:55,528 INFO L93 Difference]: Finished difference Result 222279 states and 322086 transitions. [2020-12-22 10:17:55,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:17:55,528 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 129 [2020-12-22 10:17:55,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:17:56,018 INFO L225 Difference]: With dead ends: 222279 [2020-12-22 10:17:56,018 INFO L226 Difference]: Without dead ends: 204549 [2020-12-22 10:17:56,089 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:17:56,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204549 states. [2020-12-22 10:18:06,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204549 to 121335. [2020-12-22 10:18:06,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121335 states. [2020-12-22 10:18:06,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121335 states to 121335 states and 174558 transitions. [2020-12-22 10:18:06,628 INFO L78 Accepts]: Start accepts. Automaton has 121335 states and 174558 transitions. Word has length 129 [2020-12-22 10:18:06,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:18:06,628 INFO L481 AbstractCegarLoop]: Abstraction has 121335 states and 174558 transitions. [2020-12-22 10:18:06,628 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:18:06,628 INFO L276 IsEmpty]: Start isEmpty. Operand 121335 states and 174558 transitions. [2020-12-22 10:18:06,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-22 10:18:06,644 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:18:06,645 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:18:06,645 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 10:18:06,646 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:18:06,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:18:06,647 INFO L82 PathProgramCache]: Analyzing trace with hash 375573628, now seen corresponding path program 1 times [2020-12-22 10:18:06,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:18:06,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055662878] [2020-12-22 10:18:06,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:18:06,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:18:06,890 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 10:18:06,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055662878] [2020-12-22 10:18:06,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:18:06,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:18:06,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139101430] [2020-12-22 10:18:06,894 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:18:06,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:18:06,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:18:06,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:18:06,895 INFO L87 Difference]: Start difference. First operand 121335 states and 174558 transitions. Second operand 9 states. [2020-12-22 10:18:25,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:18:25,831 INFO L93 Difference]: Finished difference Result 240007 states and 347750 transitions. [2020-12-22 10:18:25,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:18:25,832 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 129 [2020-12-22 10:18:25,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:18:26,244 INFO L225 Difference]: With dead ends: 240007 [2020-12-22 10:18:26,244 INFO L226 Difference]: Without dead ends: 222277 [2020-12-22 10:18:26,305 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:18:26,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222277 states. [2020-12-22 10:18:38,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222277 to 139063. [2020-12-22 10:18:38,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139063 states. [2020-12-22 10:18:39,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139063 states to 139063 states and 200222 transitions. [2020-12-22 10:18:39,156 INFO L78 Accepts]: Start accepts. Automaton has 139063 states and 200222 transitions. Word has length 129 [2020-12-22 10:18:39,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:18:39,157 INFO L481 AbstractCegarLoop]: Abstraction has 139063 states and 200222 transitions. [2020-12-22 10:18:39,157 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:18:39,157 INFO L276 IsEmpty]: Start isEmpty. Operand 139063 states and 200222 transitions. [2020-12-22 10:18:39,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-12-22 10:18:39,177 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:18:39,177 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:18:39,178 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 10:18:39,178 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:18:39,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:18:39,178 INFO L82 PathProgramCache]: Analyzing trace with hash -1903775542, now seen corresponding path program 1 times [2020-12-22 10:18:39,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:18:39,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775137224] [2020-12-22 10:18:39,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:18:39,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:18:39,282 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:18:39,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775137224] [2020-12-22 10:18:39,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:18:39,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:18:39,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523689750] [2020-12-22 10:18:39,284 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:18:39,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:18:39,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:18:39,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:18:39,285 INFO L87 Difference]: Start difference. First operand 139063 states and 200222 transitions. Second operand 3 states. [2020-12-22 10:18:48,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:18:48,276 INFO L93 Difference]: Finished difference Result 231264 states and 334669 transitions. [2020-12-22 10:18:48,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:18:48,277 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 131 [2020-12-22 10:18:48,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:18:48,394 INFO L225 Difference]: With dead ends: 231264 [2020-12-22 10:18:48,394 INFO L226 Difference]: Without dead ends: 98270 [2020-12-22 10:18:48,448 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 10:18:48,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98270 states. [2020-12-22 10:18:57,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98270 to 98268. [2020-12-22 10:18:57,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98268 states. [2020-12-22 10:18:57,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98268 states to 98268 states and 141194 transitions. [2020-12-22 10:18:57,257 INFO L78 Accepts]: Start accepts. Automaton has 98268 states and 141194 transitions. Word has length 131 [2020-12-22 10:18:57,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:18:57,257 INFO L481 AbstractCegarLoop]: Abstraction has 98268 states and 141194 transitions. [2020-12-22 10:18:57,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:18:57,258 INFO L276 IsEmpty]: Start isEmpty. Operand 98268 states and 141194 transitions. [2020-12-22 10:18:57,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-12-22 10:18:57,268 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:18:57,268 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:18:57,268 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 10:18:57,268 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:18:57,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:18:57,269 INFO L82 PathProgramCache]: Analyzing trace with hash -800734569, now seen corresponding path program 1 times [2020-12-22 10:18:57,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:18:57,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313873695] [2020-12-22 10:18:57,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:18:57,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:18:57,471 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 10:18:57,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313873695] [2020-12-22 10:18:57,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:18:57,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:18:57,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132479123] [2020-12-22 10:18:57,475 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:18:57,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:18:57,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:18:57,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:18:57,477 INFO L87 Difference]: Start difference. First operand 98268 states and 141194 transitions. Second operand 9 states. [2020-12-22 10:19:14,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:19:14,429 INFO L93 Difference]: Finished difference Result 184300 states and 266642 transitions. [2020-12-22 10:19:14,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:19:14,430 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 131 [2020-12-22 10:19:14,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:19:14,668 INFO L225 Difference]: With dead ends: 184300 [2020-12-22 10:19:14,668 INFO L226 Difference]: Without dead ends: 172010 [2020-12-22 10:19:14,712 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:19:14,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172010 states. [2020-12-22 10:19:25,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172010 to 110556. [2020-12-22 10:19:25,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110556 states. [2020-12-22 10:19:25,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110556 states to 110556 states and 158986 transitions. [2020-12-22 10:19:25,987 INFO L78 Accepts]: Start accepts. Automaton has 110556 states and 158986 transitions. Word has length 131 [2020-12-22 10:19:25,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:19:25,987 INFO L481 AbstractCegarLoop]: Abstraction has 110556 states and 158986 transitions. [2020-12-22 10:19:25,987 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:19:25,987 INFO L276 IsEmpty]: Start isEmpty. Operand 110556 states and 158986 transitions. [2020-12-22 10:19:26,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-12-22 10:19:26,001 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:19:26,001 INFO L422 BasicCegarLoop]: trace histogram [2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:19:26,001 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 10:19:26,001 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:19:26,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:19:26,002 INFO L82 PathProgramCache]: Analyzing trace with hash -1473709455, now seen corresponding path program 1 times [2020-12-22 10:19:26,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:19:26,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058066824] [2020-12-22 10:19:26,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:19:26,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:19:26,108 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:19:26,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058066824] [2020-12-22 10:19:26,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:19:26,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:19:26,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123021811] [2020-12-22 10:19:26,109 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:19:26,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:19:26,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:19:26,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:19:26,114 INFO L87 Difference]: Start difference. First operand 110556 states and 158986 transitions. Second operand 3 states. [2020-12-22 10:19:31,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:19:31,676 INFO L93 Difference]: Finished difference Result 162784 states and 234604 transitions. [2020-12-22 10:19:31,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:19:31,676 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 132 [2020-12-22 10:19:31,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:19:31,738 INFO L225 Difference]: With dead ends: 162784 [2020-12-22 10:19:31,738 INFO L226 Difference]: Without dead ends: 58334 [2020-12-22 10:19:31,795 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 10:19:31,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58334 states. [2020-12-22 10:19:37,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58334 to 58332. [2020-12-22 10:19:37,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58332 states. [2020-12-22 10:19:37,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58332 states to 58332 states and 82826 transitions. [2020-12-22 10:19:37,220 INFO L78 Accepts]: Start accepts. Automaton has 58332 states and 82826 transitions. Word has length 132 [2020-12-22 10:19:37,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:19:37,220 INFO L481 AbstractCegarLoop]: Abstraction has 58332 states and 82826 transitions. [2020-12-22 10:19:37,220 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:19:37,220 INFO L276 IsEmpty]: Start isEmpty. Operand 58332 states and 82826 transitions. [2020-12-22 10:19:37,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-12-22 10:19:37,226 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:19:37,227 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:19:37,227 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-22 10:19:37,227 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:19:37,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:19:37,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1811184295, now seen corresponding path program 1 times [2020-12-22 10:19:37,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:19:37,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193519292] [2020-12-22 10:19:37,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:19:37,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:19:37,481 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:19:37,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193519292] [2020-12-22 10:19:37,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882111317] [2020-12-22 10:19:37,482 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 10:19:37,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:19:37,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 583 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 10:19:37,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:19:38,207 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 10:19:38,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:19:38,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4] total 12 [2020-12-22 10:19:38,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370431896] [2020-12-22 10:19:38,208 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 10:19:38,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:19:38,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 10:19:38,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-12-22 10:19:38,209 INFO L87 Difference]: Start difference. First operand 58332 states and 82826 transitions. Second operand 12 states.