/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_label07.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 10:16:30,910 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 10:16:30,913 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 10:16:30,950 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 10:16:30,951 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 10:16:30,952 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 10:16:30,954 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 10:16:30,956 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 10:16:30,959 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 10:16:30,960 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 10:16:30,961 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 10:16:30,963 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 10:16:30,963 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 10:16:30,965 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 10:16:30,966 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 10:16:30,967 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 10:16:30,969 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 10:16:30,972 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 10:16:30,975 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 10:16:30,980 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 10:16:30,986 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 10:16:30,989 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 10:16:31,011 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 10:16:31,015 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 10:16:31,024 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 10:16:31,050 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 10:16:31,051 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 10:16:31,052 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 10:16:31,053 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 10:16:31,110 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 10:16:31,111 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 10:16:31,115 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 10:16:31,115 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 10:16:31,115 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 10:16:31,116 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 10:16:31,117 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 10:16:31,117 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 10:16:31,117 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 10:16:31,117 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 10:16:31,119 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 10:16:31,119 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 10:16:31,119 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 10:16:31,120 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 10:16:31,120 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 10:16:31,120 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 10:16:31,120 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 10:16:31,121 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 10:16:31,121 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 10:16:31,121 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 10:16:31,122 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 10:16:31,122 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 10:16:31,122 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 10:16:31,122 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 10:16:31,123 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 10:16:31,123 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 10:16:31,588 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 10:16:31,620 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 10:16:31,623 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 10:16:31,625 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 10:16:31,625 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 10:16:31,626 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.7.ufo.UNBOUNDED.pals+Problem12_label07.c [2020-12-22 10:16:31,726 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34476e207/252aa0f2e8bc41ca959ba39969ce28a3/FLAG2434d1fcd [2020-12-22 10:16:32,755 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 10:16:32,756 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.7.ufo.UNBOUNDED.pals+Problem12_label07.c [2020-12-22 10:16:32,804 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34476e207/252aa0f2e8bc41ca959ba39969ce28a3/FLAG2434d1fcd [2020-12-22 10:16:33,241 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34476e207/252aa0f2e8bc41ca959ba39969ce28a3 [2020-12-22 10:16:33,243 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 10:16:33,246 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 10:16:33,248 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 10:16:33,248 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 10:16:33,252 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 10:16:33,253 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:16:33" (1/1) ... [2020-12-22 10:16:33,255 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20851a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:16:33, skipping insertion in model container [2020-12-22 10:16:33,255 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:16:33" (1/1) ... [2020-12-22 10:16:33,263 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 10:16:33,466 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 10:16:33,937 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_label07.c[20572,20585] [2020-12-22 10:16:33,957 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_label07.c[21171,21184] [2020-12-22 10:16:34,990 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:16:35,009 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 10:16:35,095 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_label07.c[20572,20585] [2020-12-22 10:16:35,099 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_label07.c[21171,21184] [2020-12-22 10:16:35,793 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:16:35,842 INFO L208 MainTranslator]: Completed translation [2020-12-22 10:16:35,843 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:16:35 WrapperNode [2020-12-22 10:16:35,844 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 10:16:35,846 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 10:16:35,846 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 10:16:35,846 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 10:16:35,854 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:16:35" (1/1) ... [2020-12-22 10:16:35,926 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:16:35" (1/1) ... [2020-12-22 10:16:36,351 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 10:16:36,353 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 10:16:36,353 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 10:16:36,353 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 10:16:36,363 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:16:35" (1/1) ... [2020-12-22 10:16:36,364 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:16:35" (1/1) ... [2020-12-22 10:16:36,557 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:16:35" (1/1) ... [2020-12-22 10:16:36,557 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:16:35" (1/1) ... [2020-12-22 10:16:36,825 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:16:35" (1/1) ... [2020-12-22 10:16:36,857 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:16:35" (1/1) ... [2020-12-22 10:16:36,939 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:16:35" (1/1) ... [2020-12-22 10:16:37,037 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 10:16:37,038 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 10:16:37,039 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 10:16:37,039 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 10:16:37,040 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:16:35" (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 10:16:37,148 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 10:16:37,149 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 10:16:37,149 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 10:16:37,149 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 10:16:43,070 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 10:16:43,071 INFO L299 CfgBuilder]: Removed 40 assume(true) statements. [2020-12-22 10:16:43,075 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:16:43 BoogieIcfgContainer [2020-12-22 10:16:43,076 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 10:16:43,080 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 10:16:43,082 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 10:16:43,086 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 10:16:43,087 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 10:16:33" (1/3) ... [2020-12-22 10:16:43,088 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5054676d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:16:43, skipping insertion in model container [2020-12-22 10:16:43,088 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:16:35" (2/3) ... [2020-12-22 10:16:43,088 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5054676d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:16:43, skipping insertion in model container [2020-12-22 10:16:43,088 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:16:43" (3/3) ... [2020-12-22 10:16:43,091 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.7.ufo.UNBOUNDED.pals+Problem12_label07.c [2020-12-22 10:16:43,098 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 10:16:43,104 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 10:16:43,124 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 10:16:43,173 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 10:16:43,173 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 10:16:43,173 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 10:16:43,173 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 10:16:43,174 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 10:16:43,174 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 10:16:43,174 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 10:16:43,174 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 10:16:43,214 INFO L276 IsEmpty]: Start isEmpty. Operand 945 states. [2020-12-22 10:16:43,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-22 10:16:43,220 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:16:43,221 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:16:43,221 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:16:43,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:16:43,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1911536185, now seen corresponding path program 1 times [2020-12-22 10:16:43,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:16:43,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693488619] [2020-12-22 10:16:43,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:16:43,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:16:43,599 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 10:16:43,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693488619] [2020-12-22 10:16:43,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:16:43,601 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:16:43,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19029409] [2020-12-22 10:16:43,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:16:43,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:16:43,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:16:43,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:16:43,624 INFO L87 Difference]: Start difference. First operand 945 states. Second operand 3 states. [2020-12-22 10:16:49,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:16:49,953 INFO L93 Difference]: Finished difference Result 2587 states and 4968 transitions. [2020-12-22 10:16:49,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:16:49,955 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2020-12-22 10:16:49,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:16:49,985 INFO L225 Difference]: With dead ends: 2587 [2020-12-22 10:16:49,985 INFO L226 Difference]: Without dead ends: 1630 [2020-12-22 10:16:49,998 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 10:16:50,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1630 states. [2020-12-22 10:16:50,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1630 to 1630. [2020-12-22 10:16:50,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1630 states. [2020-12-22 10:16:50,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1630 states to 1630 states and 2562 transitions. [2020-12-22 10:16:50,161 INFO L78 Accepts]: Start accepts. Automaton has 1630 states and 2562 transitions. Word has length 7 [2020-12-22 10:16:50,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:16:50,162 INFO L481 AbstractCegarLoop]: Abstraction has 1630 states and 2562 transitions. [2020-12-22 10:16:50,163 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:16:50,163 INFO L276 IsEmpty]: Start isEmpty. Operand 1630 states and 2562 transitions. [2020-12-22 10:16:50,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-22 10:16:50,167 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:16:50,168 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 10:16:50,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 10:16:50,168 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:16:50,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:16:50,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1343709944, now seen corresponding path program 1 times [2020-12-22 10:16:50,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:16:50,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193215355] [2020-12-22 10:16:50,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:16:50,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:16:50,362 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 10:16:50,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193215355] [2020-12-22 10:16:50,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:16:50,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:16:50,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066843033] [2020-12-22 10:16:50,365 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 10:16:50,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:16:50,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 10:16:50,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:16:50,366 INFO L87 Difference]: Start difference. First operand 1630 states and 2562 transitions. Second operand 5 states. [2020-12-22 10:16:50,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:16:50,532 INFO L93 Difference]: Finished difference Result 1703 states and 2676 transitions. [2020-12-22 10:16:50,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 10:16:50,533 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 42 [2020-12-22 10:16:50,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:16:50,545 INFO L225 Difference]: With dead ends: 1703 [2020-12-22 10:16:50,545 INFO L226 Difference]: Without dead ends: 1630 [2020-12-22 10:16:50,549 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 10:16:50,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1630 states. [2020-12-22 10:16:50,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1630 to 1630. [2020-12-22 10:16:50,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1630 states. [2020-12-22 10:16:50,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1630 states to 1630 states and 2512 transitions. [2020-12-22 10:16:50,605 INFO L78 Accepts]: Start accepts. Automaton has 1630 states and 2512 transitions. Word has length 42 [2020-12-22 10:16:50,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:16:50,606 INFO L481 AbstractCegarLoop]: Abstraction has 1630 states and 2512 transitions. [2020-12-22 10:16:50,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 10:16:50,607 INFO L276 IsEmpty]: Start isEmpty. Operand 1630 states and 2512 transitions. [2020-12-22 10:16:50,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 10:16:50,619 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:16:50,620 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 10:16:50,621 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 10:16:50,621 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:16:50,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:16:50,623 INFO L82 PathProgramCache]: Analyzing trace with hash -2129929827, now seen corresponding path program 1 times [2020-12-22 10:16:50,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:16:50,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243578646] [2020-12-22 10:16:50,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:16:50,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:16:50,905 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 10:16:50,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243578646] [2020-12-22 10:16:50,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:16:50,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:16:50,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207966256] [2020-12-22 10:16:50,907 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:16:50,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:16:50,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:16:50,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:16:50,909 INFO L87 Difference]: Start difference. First operand 1630 states and 2512 transitions. Second operand 3 states. [2020-12-22 10:16:56,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:16:56,540 INFO L93 Difference]: Finished difference Result 4636 states and 7199 transitions. [2020-12-22 10:16:56,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:16:56,541 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 78 [2020-12-22 10:16:56,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:16:56,558 INFO L225 Difference]: With dead ends: 4636 [2020-12-22 10:16:56,559 INFO L226 Difference]: Without dead ends: 3132 [2020-12-22 10:16:56,563 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 10:16:56,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3132 states. [2020-12-22 10:16:56,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3132 to 3132. [2020-12-22 10:16:56,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3132 states. [2020-12-22 10:16:56,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3132 states to 3132 states and 4290 transitions. [2020-12-22 10:16:56,645 INFO L78 Accepts]: Start accepts. Automaton has 3132 states and 4290 transitions. Word has length 78 [2020-12-22 10:16:56,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:16:56,646 INFO L481 AbstractCegarLoop]: Abstraction has 3132 states and 4290 transitions. [2020-12-22 10:16:56,646 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:16:56,646 INFO L276 IsEmpty]: Start isEmpty. Operand 3132 states and 4290 transitions. [2020-12-22 10:16:56,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-22 10:16:56,649 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:16:56,649 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 10:16:56,650 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 10:16:56,650 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:16:56,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:16:56,651 INFO L82 PathProgramCache]: Analyzing trace with hash -1185026642, now seen corresponding path program 1 times [2020-12-22 10:16:56,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:16:56,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704887102] [2020-12-22 10:16:56,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:16:56,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:16:56,778 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:16:56,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704887102] [2020-12-22 10:16:56,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:16:56,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:16:56,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055271502] [2020-12-22 10:16:56,780 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:16:56,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:16:56,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:16:56,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:16:56,781 INFO L87 Difference]: Start difference. First operand 3132 states and 4290 transitions. Second operand 3 states. [2020-12-22 10:17:02,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:17:02,679 INFO L93 Difference]: Finished difference Result 9144 states and 12534 transitions. [2020-12-22 10:17:02,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:17:02,681 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 84 [2020-12-22 10:17:02,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:17:02,713 INFO L225 Difference]: With dead ends: 9144 [2020-12-22 10:17:02,713 INFO L226 Difference]: Without dead ends: 6138 [2020-12-22 10:17:02,719 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 10:17:02,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6138 states. [2020-12-22 10:17:02,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6138 to 6136. [2020-12-22 10:17:02,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6136 states. [2020-12-22 10:17:02,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6136 states to 6136 states and 7817 transitions. [2020-12-22 10:17:02,847 INFO L78 Accepts]: Start accepts. Automaton has 6136 states and 7817 transitions. Word has length 84 [2020-12-22 10:17:02,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:17:02,847 INFO L481 AbstractCegarLoop]: Abstraction has 6136 states and 7817 transitions. [2020-12-22 10:17:02,847 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:17:02,847 INFO L276 IsEmpty]: Start isEmpty. Operand 6136 states and 7817 transitions. [2020-12-22 10:17:02,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:17:02,849 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:17:02,849 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 10:17:02,849 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 10:17:02,849 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:17:02,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:17:02,850 INFO L82 PathProgramCache]: Analyzing trace with hash -461668761, now seen corresponding path program 1 times [2020-12-22 10:17:02,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:17:02,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905341767] [2020-12-22 10:17:02,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:17:02,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:17:02,947 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 10:17:02,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905341767] [2020-12-22 10:17:02,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:17:02,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:17:02,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699169191] [2020-12-22 10:17:02,949 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:17:02,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:17:02,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:17:02,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:17:02,950 INFO L87 Difference]: Start difference. First operand 6136 states and 7817 transitions. Second operand 3 states. [2020-12-22 10:17:03,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:17:03,013 INFO L93 Difference]: Finished difference Result 6268 states and 8027 transitions. [2020-12-22 10:17:03,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:17:03,014 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:17:03,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:17:03,044 INFO L225 Difference]: With dead ends: 6268 [2020-12-22 10:17:03,044 INFO L226 Difference]: Without dead ends: 6199 [2020-12-22 10:17:03,048 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 10:17:03,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6199 states. [2020-12-22 10:17:03,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6199 to 6197. [2020-12-22 10:17:03,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6197 states. [2020-12-22 10:17:03,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6197 states to 6197 states and 7915 transitions. [2020-12-22 10:17:03,203 INFO L78 Accepts]: Start accepts. Automaton has 6197 states and 7915 transitions. Word has length 91 [2020-12-22 10:17:03,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:17:03,203 INFO L481 AbstractCegarLoop]: Abstraction has 6197 states and 7915 transitions. [2020-12-22 10:17:03,203 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:17:03,203 INFO L276 IsEmpty]: Start isEmpty. Operand 6197 states and 7915 transitions. [2020-12-22 10:17:03,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:17:03,205 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:17:03,205 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 10:17:03,205 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 10:17:03,205 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:17:03,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:17:03,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1207251491, now seen corresponding path program 1 times [2020-12-22 10:17:03,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:17:03,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700716179] [2020-12-22 10:17:03,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:17:03,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:17:03,347 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 10:17:03,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700716179] [2020-12-22 10:17:03,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:17:03,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:17:03,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997814767] [2020-12-22 10:17:03,349 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:17:03,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:17:03,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:17:03,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:17:03,351 INFO L87 Difference]: Start difference. First operand 6197 states and 7915 transitions. Second operand 3 states. [2020-12-22 10:17:03,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:17:03,426 INFO L93 Difference]: Finished difference Result 6445 states and 8311 transitions. [2020-12-22 10:17:03,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:17:03,427 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:17:03,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:17:03,457 INFO L225 Difference]: With dead ends: 6445 [2020-12-22 10:17:03,457 INFO L226 Difference]: Without dead ends: 6315 [2020-12-22 10:17:03,461 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 10:17:03,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6315 states. [2020-12-22 10:17:03,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6315 to 6313. [2020-12-22 10:17:03,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6313 states. [2020-12-22 10:17:03,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6313 states to 6313 states and 8100 transitions. [2020-12-22 10:17:03,615 INFO L78 Accepts]: Start accepts. Automaton has 6313 states and 8100 transitions. Word has length 91 [2020-12-22 10:17:03,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:17:03,617 INFO L481 AbstractCegarLoop]: Abstraction has 6313 states and 8100 transitions. [2020-12-22 10:17:03,617 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:17:03,617 INFO L276 IsEmpty]: Start isEmpty. Operand 6313 states and 8100 transitions. [2020-12-22 10:17:03,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:17:03,624 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:17:03,624 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 10:17:03,626 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 10:17:03,630 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:17:03,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:17:03,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1147684947, now seen corresponding path program 1 times [2020-12-22 10:17:03,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:17:03,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920034570] [2020-12-22 10:17:03,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:17:03,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:17:03,769 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 10:17:03,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920034570] [2020-12-22 10:17:03,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:17:03,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:17:03,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829323684] [2020-12-22 10:17:03,771 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:17:03,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:17:03,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:17:03,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:17:03,773 INFO L87 Difference]: Start difference. First operand 6313 states and 8100 transitions. Second operand 3 states. [2020-12-22 10:17:03,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:17:03,845 INFO L93 Difference]: Finished difference Result 6781 states and 8846 transitions. [2020-12-22 10:17:03,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:17:03,845 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:17:03,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:17:03,887 INFO L225 Difference]: With dead ends: 6781 [2020-12-22 10:17:03,887 INFO L226 Difference]: Without dead ends: 6535 [2020-12-22 10:17:03,892 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 10:17:03,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6535 states. [2020-12-22 10:17:04,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6535 to 6533. [2020-12-22 10:17:04,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6533 states. [2020-12-22 10:17:04,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6533 states to 6533 states and 8448 transitions. [2020-12-22 10:17:04,038 INFO L78 Accepts]: Start accepts. Automaton has 6533 states and 8448 transitions. Word has length 91 [2020-12-22 10:17:04,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:17:04,039 INFO L481 AbstractCegarLoop]: Abstraction has 6533 states and 8448 transitions. [2020-12-22 10:17:04,039 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:17:04,039 INFO L276 IsEmpty]: Start isEmpty. Operand 6533 states and 8448 transitions. [2020-12-22 10:17:04,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:17:04,040 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:17:04,040 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:17:04,041 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 10:17:04,041 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:17:04,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:17:04,041 INFO L82 PathProgramCache]: Analyzing trace with hash -446599735, now seen corresponding path program 1 times [2020-12-22 10:17:04,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:17:04,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799681339] [2020-12-22 10:17:04,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:17:04,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:17:04,140 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 10:17:04,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799681339] [2020-12-22 10:17:04,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:17:04,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:17:04,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458444749] [2020-12-22 10:17:04,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:17:04,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:17:04,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:17:04,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:17:04,144 INFO L87 Difference]: Start difference. First operand 6533 states and 8448 transitions. Second operand 3 states. [2020-12-22 10:17:04,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:17:04,229 INFO L93 Difference]: Finished difference Result 7417 states and 9850 transitions. [2020-12-22 10:17:04,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:17:04,230 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:17:04,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:17:04,247 INFO L225 Difference]: With dead ends: 7417 [2020-12-22 10:17:04,247 INFO L226 Difference]: Without dead ends: 6951 [2020-12-22 10:17:04,252 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 10:17:04,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6951 states. [2020-12-22 10:17:04,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6951 to 6949. [2020-12-22 10:17:04,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6949 states. [2020-12-22 10:17:04,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6949 states to 6949 states and 9100 transitions. [2020-12-22 10:17:04,536 INFO L78 Accepts]: Start accepts. Automaton has 6949 states and 9100 transitions. Word has length 91 [2020-12-22 10:17:04,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:17:04,536 INFO L481 AbstractCegarLoop]: Abstraction has 6949 states and 9100 transitions. [2020-12-22 10:17:04,536 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:17:04,537 INFO L276 IsEmpty]: Start isEmpty. Operand 6949 states and 9100 transitions. [2020-12-22 10:17:04,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:17:04,538 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:17:04,538 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 10:17:04,538 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 10:17:04,539 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:17:04,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:17:04,539 INFO L82 PathProgramCache]: Analyzing trace with hash -108806593, now seen corresponding path program 1 times [2020-12-22 10:17:04,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:17:04,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713381712] [2020-12-22 10:17:04,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:17:04,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:17:04,653 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 10:17:04,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713381712] [2020-12-22 10:17:04,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:17:04,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:17:04,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169206688] [2020-12-22 10:17:04,656 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:17:04,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:17:04,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:17:04,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:17:04,658 INFO L87 Difference]: Start difference. First operand 6949 states and 9100 transitions. Second operand 3 states. [2020-12-22 10:17:04,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:17:04,766 INFO L93 Difference]: Finished difference Result 8617 states and 11726 transitions. [2020-12-22 10:17:04,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:17:04,767 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:17:04,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:17:04,786 INFO L225 Difference]: With dead ends: 8617 [2020-12-22 10:17:04,786 INFO L226 Difference]: Without dead ends: 7735 [2020-12-22 10:17:04,792 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 10:17:04,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7735 states. [2020-12-22 10:17:04,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7735 to 7733. [2020-12-22 10:17:04,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7733 states. [2020-12-22 10:17:05,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7733 states to 7733 states and 10316 transitions. [2020-12-22 10:17:05,010 INFO L78 Accepts]: Start accepts. Automaton has 7733 states and 10316 transitions. Word has length 91 [2020-12-22 10:17:05,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:17:05,010 INFO L481 AbstractCegarLoop]: Abstraction has 7733 states and 10316 transitions. [2020-12-22 10:17:05,011 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:17:05,011 INFO L276 IsEmpty]: Start isEmpty. Operand 7733 states and 10316 transitions. [2020-12-22 10:17:05,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:17:05,012 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:17:05,012 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 10:17:05,012 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 10:17:05,013 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:17:05,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:17:05,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1109178805, now seen corresponding path program 1 times [2020-12-22 10:17:05,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:17:05,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124555042] [2020-12-22 10:17:05,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:17:05,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:17:05,168 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 10:17:05,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124555042] [2020-12-22 10:17:05,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:17:05,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:17:05,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937567845] [2020-12-22 10:17:05,169 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:17:05,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:17:05,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:17:05,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:17:05,170 INFO L87 Difference]: Start difference. First operand 7733 states and 10316 transitions. Second operand 9 states. [2020-12-22 10:17:06,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:17:06,571 INFO L93 Difference]: Finished difference Result 31057 states and 46842 transitions. [2020-12-22 10:17:06,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 10:17:06,572 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 91 [2020-12-22 10:17:06,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:17:06,640 INFO L225 Difference]: With dead ends: 31057 [2020-12-22 10:17:06,640 INFO L226 Difference]: Without dead ends: 29391 [2020-12-22 10:17:06,656 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 10:17:06,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29391 states. [2020-12-22 10:17:07,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29391 to 9397. [2020-12-22 10:17:07,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9397 states. [2020-12-22 10:17:07,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9397 states to 9397 states and 12860 transitions. [2020-12-22 10:17:07,240 INFO L78 Accepts]: Start accepts. Automaton has 9397 states and 12860 transitions. Word has length 91 [2020-12-22 10:17:07,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:17:07,240 INFO L481 AbstractCegarLoop]: Abstraction has 9397 states and 12860 transitions. [2020-12-22 10:17:07,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:17:07,240 INFO L276 IsEmpty]: Start isEmpty. Operand 9397 states and 12860 transitions. [2020-12-22 10:17:07,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 10:17:07,242 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:17:07,242 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 10:17:07,242 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 10:17:07,242 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:17:07,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:17:07,243 INFO L82 PathProgramCache]: Analyzing trace with hash -646747483, now seen corresponding path program 1 times [2020-12-22 10:17:07,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:17:07,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011372953] [2020-12-22 10:17:07,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:17:07,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:17:07,328 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 10:17:07,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011372953] [2020-12-22 10:17:07,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:17:07,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:17:07,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606710405] [2020-12-22 10:17:07,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:17:07,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:17:07,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:17:07,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:17:07,331 INFO L87 Difference]: Start difference. First operand 9397 states and 12860 transitions. Second operand 3 states. [2020-12-22 10:17:07,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:17:07,728 INFO L93 Difference]: Finished difference Result 15705 states and 22558 transitions. [2020-12-22 10:17:07,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:17:07,729 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 93 [2020-12-22 10:17:07,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:17:07,756 INFO L225 Difference]: With dead ends: 15705 [2020-12-22 10:17:07,756 INFO L226 Difference]: Without dead ends: 12375 [2020-12-22 10:17:07,767 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 10:17:07,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12375 states. [2020-12-22 10:17:08,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12375 to 12309. [2020-12-22 10:17:08,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12309 states. [2020-12-22 10:17:08,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12309 states to 12309 states and 17180 transitions. [2020-12-22 10:17:08,281 INFO L78 Accepts]: Start accepts. Automaton has 12309 states and 17180 transitions. Word has length 93 [2020-12-22 10:17:08,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:17:08,281 INFO L481 AbstractCegarLoop]: Abstraction has 12309 states and 17180 transitions. [2020-12-22 10:17:08,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:17:08,282 INFO L276 IsEmpty]: Start isEmpty. Operand 12309 states and 17180 transitions. [2020-12-22 10:17:08,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 10:17:08,283 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:17:08,283 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 10:17:08,283 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 10:17:08,284 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:17:08,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:17:08,284 INFO L82 PathProgramCache]: Analyzing trace with hash -580253971, now seen corresponding path program 1 times [2020-12-22 10:17:08,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:17:08,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72029997] [2020-12-22 10:17:08,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:17:08,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:17:08,638 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 10:17:08,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72029997] [2020-12-22 10:17:08,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:17:08,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:17:08,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873126971] [2020-12-22 10:17:08,639 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:17:08,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:17:08,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:17:08,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:17:08,641 INFO L87 Difference]: Start difference. First operand 12309 states and 17180 transitions. Second operand 9 states. [2020-12-22 10:17:09,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:17:09,613 INFO L93 Difference]: Finished difference Result 18553 states and 26654 transitions. [2020-12-22 10:17:09,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:17:09,614 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 93 [2020-12-22 10:17:09,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:17:09,648 INFO L225 Difference]: With dead ends: 18553 [2020-12-22 10:17:09,648 INFO L226 Difference]: Without dead ends: 12311 [2020-12-22 10:17:09,663 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 10:17:09,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12311 states. [2020-12-22 10:17:10,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12311 to 12309. [2020-12-22 10:17:10,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12309 states. [2020-12-22 10:17:10,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12309 states to 12309 states and 17116 transitions. [2020-12-22 10:17:10,177 INFO L78 Accepts]: Start accepts. Automaton has 12309 states and 17116 transitions. Word has length 93 [2020-12-22 10:17:10,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:17:10,177 INFO L481 AbstractCegarLoop]: Abstraction has 12309 states and 17116 transitions. [2020-12-22 10:17:10,177 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:17:10,178 INFO L276 IsEmpty]: Start isEmpty. Operand 12309 states and 17116 transitions. [2020-12-22 10:17:10,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 10:17:10,179 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:17:10,179 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 10:17:10,179 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 10:17:10,179 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:17:10,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:17:10,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1326262359, now seen corresponding path program 1 times [2020-12-22 10:17:10,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:17:10,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70687170] [2020-12-22 10:17:10,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:17:10,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:17:10,252 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 10:17:10,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70687170] [2020-12-22 10:17:10,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:17:10,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:17:10,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635312191] [2020-12-22 10:17:10,253 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:17:10,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:17:10,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:17:10,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:17:10,260 INFO L87 Difference]: Start difference. First operand 12309 states and 17116 transitions. Second operand 3 states. [2020-12-22 10:17:10,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:17:10,981 INFO L93 Difference]: Finished difference Result 24025 states and 34654 transitions. [2020-12-22 10:17:10,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:17:10,981 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 93 [2020-12-22 10:17:10,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:17:11,016 INFO L225 Difference]: With dead ends: 24025 [2020-12-22 10:17:11,016 INFO L226 Difference]: Without dead ends: 17783 [2020-12-22 10:17:11,028 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 10:17:11,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17783 states. [2020-12-22 10:17:11,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17783 to 17781. [2020-12-22 10:17:11,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17781 states. [2020-12-22 10:17:11,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17781 states to 17781 states and 25116 transitions. [2020-12-22 10:17:11,721 INFO L78 Accepts]: Start accepts. Automaton has 17781 states and 25116 transitions. Word has length 93 [2020-12-22 10:17:11,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:17:11,722 INFO L481 AbstractCegarLoop]: Abstraction has 17781 states and 25116 transitions. [2020-12-22 10:17:11,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:17:11,722 INFO L276 IsEmpty]: Start isEmpty. Operand 17781 states and 25116 transitions. [2020-12-22 10:17:11,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 10:17:11,723 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:17:11,723 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 10:17:11,724 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 10:17:11,724 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:17:11,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:17:11,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1222726774, now seen corresponding path program 1 times [2020-12-22 10:17:11,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:17:11,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661004891] [2020-12-22 10:17:11,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:17:11,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:17:11,852 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 10:17:11,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661004891] [2020-12-22 10:17:11,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:17:11,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:17:11,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796614371] [2020-12-22 10:17:11,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:17:11,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:17:11,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:17:11,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:17:11,855 INFO L87 Difference]: Start difference. First operand 17781 states and 25116 transitions. Second operand 8 states. [2020-12-22 10:17:13,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:17:13,221 INFO L93 Difference]: Finished difference Result 26523 states and 37900 transitions. [2020-12-22 10:17:13,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:17:13,222 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 94 [2020-12-22 10:17:13,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:17:13,283 INFO L225 Difference]: With dead ends: 26523 [2020-12-22 10:17:13,284 INFO L226 Difference]: Without dead ends: 26521 [2020-12-22 10:17:13,295 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 10:17:13,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26521 states. [2020-12-22 10:17:14,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26521 to 18165. [2020-12-22 10:17:14,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18165 states. [2020-12-22 10:17:14,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18165 states to 18165 states and 25436 transitions. [2020-12-22 10:17:14,397 INFO L78 Accepts]: Start accepts. Automaton has 18165 states and 25436 transitions. Word has length 94 [2020-12-22 10:17:14,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:17:14,397 INFO L481 AbstractCegarLoop]: Abstraction has 18165 states and 25436 transitions. [2020-12-22 10:17:14,398 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:17:14,398 INFO L276 IsEmpty]: Start isEmpty. Operand 18165 states and 25436 transitions. [2020-12-22 10:17:14,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 10:17:14,399 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:17:14,399 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 10:17:14,400 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 10:17:14,400 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:17:14,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:17:14,401 INFO L82 PathProgramCache]: Analyzing trace with hash -362720764, now seen corresponding path program 1 times [2020-12-22 10:17:14,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:17:14,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271421324] [2020-12-22 10:17:14,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:17:14,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:17:14,477 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 10:17:14,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271421324] [2020-12-22 10:17:14,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:17:14,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:17:14,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356229739] [2020-12-22 10:17:14,479 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:17:14,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:17:14,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:17:14,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:17:14,480 INFO L87 Difference]: Start difference. First operand 18165 states and 25436 transitions. Second operand 3 states. [2020-12-22 10:17:15,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:17:15,427 INFO L93 Difference]: Finished difference Result 30460 states and 43618 transitions. [2020-12-22 10:17:15,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:17:15,428 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 95 [2020-12-22 10:17:15,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:17:15,469 INFO L225 Difference]: With dead ends: 30460 [2020-12-22 10:17:15,469 INFO L226 Difference]: Without dead ends: 23801 [2020-12-22 10:17:15,481 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 10:17:15,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23801 states. [2020-12-22 10:17:16,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23801 to 23799. [2020-12-22 10:17:16,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23799 states. [2020-12-22 10:17:16,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23799 states to 23799 states and 33566 transitions. [2020-12-22 10:17:16,536 INFO L78 Accepts]: Start accepts. Automaton has 23799 states and 33566 transitions. Word has length 95 [2020-12-22 10:17:16,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:17:16,537 INFO L481 AbstractCegarLoop]: Abstraction has 23799 states and 33566 transitions. [2020-12-22 10:17:16,537 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:17:16,537 INFO L276 IsEmpty]: Start isEmpty. Operand 23799 states and 33566 transitions. [2020-12-22 10:17:16,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-22 10:17:16,547 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:17:16,548 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 10:17:16,548 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 10:17:16,548 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:17:16,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:17:16,548 INFO L82 PathProgramCache]: Analyzing trace with hash 388249298, now seen corresponding path program 1 times [2020-12-22 10:17:16,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:17:16,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106348874] [2020-12-22 10:17:16,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:17:16,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:17:16,852 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 10:17:16,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106348874] [2020-12-22 10:17:16,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:17:16,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:17:16,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587540985] [2020-12-22 10:17:16,856 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:17:16,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:17:16,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:17:16,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:17:16,857 INFO L87 Difference]: Start difference. First operand 23799 states and 33566 transitions. Second operand 9 states. [2020-12-22 10:17:23,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:17:23,566 INFO L93 Difference]: Finished difference Result 151367 states and 219430 transitions. [2020-12-22 10:17:23,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:17:23,567 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 129 [2020-12-22 10:17:23,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:17:23,753 INFO L225 Difference]: With dead ends: 151367 [2020-12-22 10:17:23,753 INFO L226 Difference]: Without dead ends: 133637 [2020-12-22 10:17:23,804 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 10:17:23,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133637 states. [2020-12-22 10:17:27,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133637 to 41527. [2020-12-22 10:17:27,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41527 states. [2020-12-22 10:17:27,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41527 states to 41527 states and 59230 transitions. [2020-12-22 10:17:27,274 INFO L78 Accepts]: Start accepts. Automaton has 41527 states and 59230 transitions. Word has length 129 [2020-12-22 10:17:27,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:17:27,275 INFO L481 AbstractCegarLoop]: Abstraction has 41527 states and 59230 transitions. [2020-12-22 10:17:27,275 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:17:27,275 INFO L276 IsEmpty]: Start isEmpty. Operand 41527 states and 59230 transitions. [2020-12-22 10:17:27,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-22 10:17:27,288 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:17:27,289 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 10:17:27,289 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 10:17:27,289 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:17:27,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:17:27,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1380533518, now seen corresponding path program 1 times [2020-12-22 10:17:27,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:17:27,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267495968] [2020-12-22 10:17:27,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:17:27,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:17:27,497 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 10:17:27,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267495968] [2020-12-22 10:17:27,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:17:27,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:17:27,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537819981] [2020-12-22 10:17:27,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:17:27,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:17:27,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:17:27,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:17:27,500 INFO L87 Difference]: Start difference. First operand 41527 states and 59230 transitions. Second operand 9 states. [2020-12-22 10:17:27,650 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-12-22 10:17:36,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:17:36,344 INFO L93 Difference]: Finished difference Result 169095 states and 245094 transitions. [2020-12-22 10:17:36,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:17:36,344 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 129 [2020-12-22 10:17:36,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:17:36,719 INFO L225 Difference]: With dead ends: 169095 [2020-12-22 10:17:36,720 INFO L226 Difference]: Without dead ends: 151365 [2020-12-22 10:17:36,788 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:17:36,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151365 states. [2020-12-22 10:17:41,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151365 to 68151. [2020-12-22 10:17:41,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68151 states. [2020-12-22 10:17:42,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68151 states to 68151 states and 97566 transitions. [2020-12-22 10:17:42,011 INFO L78 Accepts]: Start accepts. Automaton has 68151 states and 97566 transitions. Word has length 129 [2020-12-22 10:17:42,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:17:42,011 INFO L481 AbstractCegarLoop]: Abstraction has 68151 states and 97566 transitions. [2020-12-22 10:17:42,011 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:17:42,012 INFO L276 IsEmpty]: Start isEmpty. Operand 68151 states and 97566 transitions. [2020-12-22 10:17:42,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-22 10:17:42,026 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:17:42,026 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 10:17:42,027 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 10:17:42,027 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:17:42,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:17:42,028 INFO L82 PathProgramCache]: Analyzing trace with hash -248893678, now seen corresponding path program 1 times [2020-12-22 10:17:42,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:17:42,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960552964] [2020-12-22 10:17:42,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:17:42,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:17:42,203 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 10:17:42,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960552964] [2020-12-22 10:17:42,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:17:42,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:17:42,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412629390] [2020-12-22 10:17:42,207 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:17:42,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:17:42,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:17:42,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:17:42,209 INFO L87 Difference]: Start difference. First operand 68151 states and 97566 transitions. Second operand 9 states. [2020-12-22 10:17:52,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:17:52,467 INFO L93 Difference]: Finished difference Result 186823 states and 270758 transitions. [2020-12-22 10:17:52,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:17:52,467 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 129 [2020-12-22 10:17:52,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:17:52,837 INFO L225 Difference]: With dead ends: 186823 [2020-12-22 10:17:52,838 INFO L226 Difference]: Without dead ends: 169093 [2020-12-22 10:17:52,873 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 10:17:52,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169093 states. [2020-12-22 10:17:59,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169093 to 85879. [2020-12-22 10:17:59,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85879 states. [2020-12-22 10:17:59,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85879 states to 85879 states and 123230 transitions. [2020-12-22 10:17:59,390 INFO L78 Accepts]: Start accepts. Automaton has 85879 states and 123230 transitions. Word has length 129 [2020-12-22 10:17:59,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:17:59,390 INFO L481 AbstractCegarLoop]: Abstraction has 85879 states and 123230 transitions. [2020-12-22 10:17:59,390 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:17:59,390 INFO L276 IsEmpty]: Start isEmpty. Operand 85879 states and 123230 transitions. [2020-12-22 10:17:59,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-22 10:17:59,404 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:17:59,405 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 10:17:59,405 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 10:17:59,405 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:17:59,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:17:59,406 INFO L82 PathProgramCache]: Analyzing trace with hash -1484352718, now seen corresponding path program 1 times [2020-12-22 10:17:59,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:17:59,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951490261] [2020-12-22 10:17:59,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:17:59,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:17:59,613 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 10:17:59,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951490261] [2020-12-22 10:17:59,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:17:59,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:17:59,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234677736] [2020-12-22 10:17:59,614 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:17:59,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:17:59,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:17:59,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:17:59,615 INFO L87 Difference]: Start difference. First operand 85879 states and 123230 transitions. Second operand 9 states. [2020-12-22 10:18:12,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:18:12,138 INFO L93 Difference]: Finished difference Result 204551 states and 296422 transitions. [2020-12-22 10:18:12,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:18:12,139 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 129 [2020-12-22 10:18:12,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:18:12,568 INFO L225 Difference]: With dead ends: 204551 [2020-12-22 10:18:12,569 INFO L226 Difference]: Without dead ends: 186821 [2020-12-22 10:18:12,607 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 10:18:12,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186821 states. [2020-12-22 10:18:20,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186821 to 103607. [2020-12-22 10:18:20,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103607 states. [2020-12-22 10:18:21,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103607 states to 103607 states and 148894 transitions. [2020-12-22 10:18:21,064 INFO L78 Accepts]: Start accepts. Automaton has 103607 states and 148894 transitions. Word has length 129 [2020-12-22 10:18:21,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:18:21,064 INFO L481 AbstractCegarLoop]: Abstraction has 103607 states and 148894 transitions. [2020-12-22 10:18:21,064 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:18:21,064 INFO L276 IsEmpty]: Start isEmpty. Operand 103607 states and 148894 transitions. [2020-12-22 10:18:21,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-22 10:18:21,075 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:18:21,075 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 10:18:21,075 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 10:18:21,075 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:18:21,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:18:21,076 INFO L82 PathProgramCache]: Analyzing trace with hash 1389619026, now seen corresponding path program 1 times [2020-12-22 10:18:21,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:18:21,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458121029] [2020-12-22 10:18:21,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:18:21,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:18:21,299 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 10:18:21,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458121029] [2020-12-22 10:18:21,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:18:21,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:18:21,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870608835] [2020-12-22 10:18:21,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:18:21,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:18:21,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:18:21,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:18:21,304 INFO L87 Difference]: Start difference. First operand 103607 states and 148894 transitions. Second operand 9 states. [2020-12-22 10:18:36,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:18:36,930 INFO L93 Difference]: Finished difference Result 222279 states and 322086 transitions. [2020-12-22 10:18:36,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:18:36,930 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 129 [2020-12-22 10:18:36,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:18:37,220 INFO L225 Difference]: With dead ends: 222279 [2020-12-22 10:18:37,220 INFO L226 Difference]: Without dead ends: 204549 [2020-12-22 10:18:37,511 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 10:18:37,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204549 states. [2020-12-22 10:18:47,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204549 to 121335. [2020-12-22 10:18:47,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121335 states. [2020-12-22 10:18:47,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121335 states to 121335 states and 174558 transitions. [2020-12-22 10:18:47,902 INFO L78 Accepts]: Start accepts. Automaton has 121335 states and 174558 transitions. Word has length 129 [2020-12-22 10:18:47,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:18:47,902 INFO L481 AbstractCegarLoop]: Abstraction has 121335 states and 174558 transitions. [2020-12-22 10:18:47,902 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:18:47,902 INFO L276 IsEmpty]: Start isEmpty. Operand 121335 states and 174558 transitions. [2020-12-22 10:18:47,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-22 10:18:47,915 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:18:47,915 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 10:18:47,915 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 10:18:47,916 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:18:47,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:18:47,916 INFO L82 PathProgramCache]: Analyzing trace with hash 375573628, now seen corresponding path program 1 times [2020-12-22 10:18:47,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:18:47,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366101047] [2020-12-22 10:18:47,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:18:47,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:18:48,111 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 10:18:48,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366101047] [2020-12-22 10:18:48,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:18:48,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:18:48,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979666156] [2020-12-22 10:18:48,112 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:18:48,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:18:48,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:18:48,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:18:48,113 INFO L87 Difference]: Start difference. First operand 121335 states and 174558 transitions. Second operand 9 states. [2020-12-22 10:19:07,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:19:07,335 INFO L93 Difference]: Finished difference Result 240007 states and 347750 transitions. [2020-12-22 10:19:07,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:19:07,336 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 129 [2020-12-22 10:19:07,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:19:07,715 INFO L225 Difference]: With dead ends: 240007 [2020-12-22 10:19:07,716 INFO L226 Difference]: Without dead ends: 222277 [2020-12-22 10:19:07,775 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 10:19:07,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222277 states. [2020-12-22 10:19:20,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222277 to 139063. [2020-12-22 10:19:20,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139063 states. [2020-12-22 10:19:21,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139063 states to 139063 states and 200222 transitions. [2020-12-22 10:19:21,318 INFO L78 Accepts]: Start accepts. Automaton has 139063 states and 200222 transitions. Word has length 129 [2020-12-22 10:19:21,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:19:21,319 INFO L481 AbstractCegarLoop]: Abstraction has 139063 states and 200222 transitions. [2020-12-22 10:19:21,319 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:19:21,319 INFO L276 IsEmpty]: Start isEmpty. Operand 139063 states and 200222 transitions. [2020-12-22 10:19:21,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-12-22 10:19:21,346 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:19:21,347 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 10:19:21,347 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 10:19:21,347 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:19:21,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:19:21,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1903775542, now seen corresponding path program 1 times [2020-12-22 10:19:21,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:19:21,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908780980] [2020-12-22 10:19:21,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:19:21,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:19:21,502 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 10:19:21,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908780980] [2020-12-22 10:19:21,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:19:21,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:19:21,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894716213] [2020-12-22 10:19:21,504 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:19:21,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:19:21,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:19:21,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:19:21,505 INFO L87 Difference]: Start difference. First operand 139063 states and 200222 transitions. Second operand 3 states. [2020-12-22 10:19:30,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:19:30,379 INFO L93 Difference]: Finished difference Result 231264 states and 334669 transitions. [2020-12-22 10:19:30,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:19:30,380 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 131 [2020-12-22 10:19:30,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:19:30,513 INFO L225 Difference]: With dead ends: 231264 [2020-12-22 10:19:30,513 INFO L226 Difference]: Without dead ends: 98270 [2020-12-22 10:19:30,571 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 10:19:30,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98270 states. [2020-12-22 10:19:39,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98270 to 98268. [2020-12-22 10:19:39,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98268 states. [2020-12-22 10:19:39,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98268 states to 98268 states and 141194 transitions. [2020-12-22 10:19:39,387 INFO L78 Accepts]: Start accepts. Automaton has 98268 states and 141194 transitions. Word has length 131 [2020-12-22 10:19:39,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:19:39,387 INFO L481 AbstractCegarLoop]: Abstraction has 98268 states and 141194 transitions. [2020-12-22 10:19:39,387 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:19:39,387 INFO L276 IsEmpty]: Start isEmpty. Operand 98268 states and 141194 transitions. [2020-12-22 10:19:39,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-12-22 10:19:39,398 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:19:39,398 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 10:19:39,398 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 10:19:39,398 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:19:39,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:19:39,398 INFO L82 PathProgramCache]: Analyzing trace with hash -800734569, now seen corresponding path program 1 times [2020-12-22 10:19:39,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:19:39,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088568051] [2020-12-22 10:19:39,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:19:39,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:19:39,795 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 10:19:39,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088568051] [2020-12-22 10:19:39,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:19:39,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:19:39,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99340193] [2020-12-22 10:19:39,800 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:19:39,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:19:39,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:19:39,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:19:39,802 INFO L87 Difference]: Start difference. First operand 98268 states and 141194 transitions. Second operand 9 states. [2020-12-22 10:19:56,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:19:56,316 INFO L93 Difference]: Finished difference Result 184300 states and 266642 transitions. [2020-12-22 10:19:56,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:19:56,317 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 131 [2020-12-22 10:19:56,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:19:56,553 INFO L225 Difference]: With dead ends: 184300 [2020-12-22 10:19:56,553 INFO L226 Difference]: Without dead ends: 172010 [2020-12-22 10:19:56,594 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 10:19:56,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172010 states. [2020-12-22 10:20:07,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172010 to 110556. [2020-12-22 10:20:07,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110556 states. [2020-12-22 10:20:07,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110556 states to 110556 states and 158986 transitions. [2020-12-22 10:20:07,562 INFO L78 Accepts]: Start accepts. Automaton has 110556 states and 158986 transitions. Word has length 131 [2020-12-22 10:20:07,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:20:07,562 INFO L481 AbstractCegarLoop]: Abstraction has 110556 states and 158986 transitions. [2020-12-22 10:20:07,562 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:20:07,562 INFO L276 IsEmpty]: Start isEmpty. Operand 110556 states and 158986 transitions. [2020-12-22 10:20:07,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-12-22 10:20:07,581 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:20:07,582 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 10:20:07,582 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 10:20:07,582 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:20:07,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:20:07,582 INFO L82 PathProgramCache]: Analyzing trace with hash -1473709455, now seen corresponding path program 1 times [2020-12-22 10:20:07,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:20:07,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843356497] [2020-12-22 10:20:07,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:20:07,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:20:07,871 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 10:20:07,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843356497] [2020-12-22 10:20:07,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:20:07,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:20:07,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528671253] [2020-12-22 10:20:07,872 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:20:07,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:20:07,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:20:07,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:20:07,877 INFO L87 Difference]: Start difference. First operand 110556 states and 158986 transitions. Second operand 3 states.