/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/seq-mthreaded-reduced/pals_floodmax.5.3.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 08:14:12,999 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 08:14:13,004 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 08:14:13,047 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 08:14:13,047 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 08:14:13,049 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 08:14:13,051 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 08:14:13,053 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 08:14:13,056 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 08:14:13,057 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 08:14:13,058 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 08:14:13,060 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 08:14:13,060 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 08:14:13,062 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 08:14:13,063 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 08:14:13,064 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 08:14:13,065 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 08:14:13,066 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 08:14:13,080 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 08:14:13,082 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 08:14:13,084 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 08:14:13,085 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 08:14:13,087 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 08:14:13,087 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 08:14:13,090 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 08:14:13,099 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 08:14:13,100 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 08:14:13,101 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 08:14:13,102 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 08:14:13,127 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 08:14:13,127 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 08:14:13,129 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 08:14:13,129 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 08:14:13,129 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 08:14:13,130 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 08:14:13,130 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 08:14:13,130 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 08:14:13,130 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 08:14:13,130 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 08:14:13,130 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 08:14:13,131 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 08:14:13,131 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 08:14:13,131 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 08:14:13,131 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 08:14:13,131 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 08:14:13,132 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 08:14:13,132 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 08:14:13,132 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 08:14:13,132 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 08:14:13,132 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 08:14:13,133 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 08:14:13,133 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 08:14:13,133 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 08:14:13,133 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 08:14:13,133 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 08:14:13,497 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 08:14:13,536 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 08:14:13,539 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 08:14:13,541 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 08:14:13,541 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 08:14:13,542 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.5.3.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2020-12-22 08:14:13,612 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a8a8e7d55/810ab8957e074b9c8e760e7a1f628c10/FLAG882008abc [2020-12-22 08:14:14,443 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 08:14:14,443 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.5.3.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2020-12-22 08:14:14,473 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a8a8e7d55/810ab8957e074b9c8e760e7a1f628c10/FLAG882008abc [2020-12-22 08:14:14,594 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a8a8e7d55/810ab8957e074b9c8e760e7a1f628c10 [2020-12-22 08:14:14,598 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 08:14:14,601 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 08:14:14,606 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 08:14:14,607 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 08:14:14,611 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 08:14:14,612 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:14:14" (1/1) ... [2020-12-22 08:14:14,613 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@262cc5a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:14:14, skipping insertion in model container [2020-12-22 08:14:14,613 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:14:14" (1/1) ... [2020-12-22 08:14:14,627 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 08:14:14,732 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 08:14:15,126 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/seq-mthreaded-reduced/pals_floodmax.5.3.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c[21680,21693] [2020-12-22 08:14:15,400 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:14:15,425 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 08:14:15,761 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/seq-mthreaded-reduced/pals_floodmax.5.3.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c[21680,21693] [2020-12-22 08:14:15,845 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:14:15,884 INFO L208 MainTranslator]: Completed translation [2020-12-22 08:14:15,884 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:14:15 WrapperNode [2020-12-22 08:14:15,885 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 08:14:15,887 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 08:14:15,887 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 08:14:15,887 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 08:14:15,897 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:14:15" (1/1) ... [2020-12-22 08:14:15,948 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:14:15" (1/1) ... [2020-12-22 08:14:16,039 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 08:14:16,041 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 08:14:16,041 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 08:14:16,041 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 08:14:16,051 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:14:15" (1/1) ... [2020-12-22 08:14:16,052 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:14:15" (1/1) ... [2020-12-22 08:14:16,059 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:14:15" (1/1) ... [2020-12-22 08:14:16,060 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:14:15" (1/1) ... [2020-12-22 08:14:16,090 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:14:15" (1/1) ... [2020-12-22 08:14:16,116 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:14:15" (1/1) ... [2020-12-22 08:14:16,135 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:14:15" (1/1) ... [2020-12-22 08:14:16,155 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 08:14:16,157 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 08:14:16,157 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 08:14:16,157 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 08:14:16,158 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:14:15" (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 08:14:16,268 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 08:14:16,268 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 08:14:16,268 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 08:14:16,269 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 08:14:18,772 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 08:14:18,774 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 08:14:18,779 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:14:18 BoogieIcfgContainer [2020-12-22 08:14:18,779 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 08:14:18,781 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 08:14:18,782 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 08:14:18,786 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 08:14:18,787 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 08:14:14" (1/3) ... [2020-12-22 08:14:18,788 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e577083 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:14:18, skipping insertion in model container [2020-12-22 08:14:18,788 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:14:15" (2/3) ... [2020-12-22 08:14:18,789 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e577083 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:14:18, skipping insertion in model container [2020-12-22 08:14:18,789 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:14:18" (3/3) ... [2020-12-22 08:14:18,790 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.3.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2020-12-22 08:14:18,798 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 08:14:18,804 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 08:14:18,824 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 08:14:18,875 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 08:14:18,876 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 08:14:18,876 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 08:14:18,876 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 08:14:18,876 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 08:14:18,877 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 08:14:18,877 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 08:14:18,877 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 08:14:18,916 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states. [2020-12-22 08:14:18,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2020-12-22 08:14:18,945 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:14:18,949 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:14:18,950 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:14:18,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:14:18,958 INFO L82 PathProgramCache]: Analyzing trace with hash -666845715, now seen corresponding path program 1 times [2020-12-22 08:14:18,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:14:18,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385251061] [2020-12-22 08:14:18,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:14:19,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:14:19,829 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 08:14:19,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385251061] [2020-12-22 08:14:19,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:14:19,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:14:19,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631157419] [2020-12-22 08:14:19,841 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:14:19,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:14:19,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:14:19,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:14:19,863 INFO L87 Difference]: Start difference. First operand 736 states. Second operand 3 states. [2020-12-22 08:14:20,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:14:20,099 INFO L93 Difference]: Finished difference Result 1109 states and 1983 transitions. [2020-12-22 08:14:20,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:14:20,101 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 204 [2020-12-22 08:14:20,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:14:20,161 INFO L225 Difference]: With dead ends: 1109 [2020-12-22 08:14:20,162 INFO L226 Difference]: Without dead ends: 910 [2020-12-22 08:14:20,173 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 08:14:20,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 910 states. [2020-12-22 08:14:20,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 910 to 908. [2020-12-22 08:14:20,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 908 states. [2020-12-22 08:14:20,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 908 states to 908 states and 1580 transitions. [2020-12-22 08:14:20,320 INFO L78 Accepts]: Start accepts. Automaton has 908 states and 1580 transitions. Word has length 204 [2020-12-22 08:14:20,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:14:20,323 INFO L481 AbstractCegarLoop]: Abstraction has 908 states and 1580 transitions. [2020-12-22 08:14:20,324 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:14:20,324 INFO L276 IsEmpty]: Start isEmpty. Operand 908 states and 1580 transitions. [2020-12-22 08:14:20,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2020-12-22 08:14:20,336 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:14:20,336 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:14:20,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 08:14:20,338 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:14:20,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:14:20,341 INFO L82 PathProgramCache]: Analyzing trace with hash 961374666, now seen corresponding path program 1 times [2020-12-22 08:14:20,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:14:20,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231358275] [2020-12-22 08:14:20,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:14:20,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:14:20,792 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 08:14:20,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231358275] [2020-12-22 08:14:20,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:14:20,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:14:20,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849317542] [2020-12-22 08:14:20,800 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:14:20,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:14:20,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:14:20,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:14:20,802 INFO L87 Difference]: Start difference. First operand 908 states and 1580 transitions. Second operand 3 states. [2020-12-22 08:14:20,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:14:20,893 INFO L93 Difference]: Finished difference Result 1616 states and 2772 transitions. [2020-12-22 08:14:20,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:14:20,894 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 208 [2020-12-22 08:14:20,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:14:20,912 INFO L225 Difference]: With dead ends: 1616 [2020-12-22 08:14:20,913 INFO L226 Difference]: Without dead ends: 1251 [2020-12-22 08:14:20,921 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 08:14:20,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1251 states. [2020-12-22 08:14:20,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1251 to 1249. [2020-12-22 08:14:20,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1249 states. [2020-12-22 08:14:20,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1249 states to 1249 states and 2152 transitions. [2020-12-22 08:14:20,991 INFO L78 Accepts]: Start accepts. Automaton has 1249 states and 2152 transitions. Word has length 208 [2020-12-22 08:14:20,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:14:20,993 INFO L481 AbstractCegarLoop]: Abstraction has 1249 states and 2152 transitions. [2020-12-22 08:14:20,993 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:14:20,994 INFO L276 IsEmpty]: Start isEmpty. Operand 1249 states and 2152 transitions. [2020-12-22 08:14:20,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2020-12-22 08:14:21,001 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:14:21,002 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:14:21,002 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 08:14:21,002 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:14:21,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:14:21,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1204290054, now seen corresponding path program 1 times [2020-12-22 08:14:21,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:14:21,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384025278] [2020-12-22 08:14:21,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:14:21,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:14:21,330 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 08:14:21,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384025278] [2020-12-22 08:14:21,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:14:21,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:14:21,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815640341] [2020-12-22 08:14:21,333 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:14:21,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:14:21,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:14:21,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:14:21,334 INFO L87 Difference]: Start difference. First operand 1249 states and 2152 transitions. Second operand 3 states. [2020-12-22 08:14:21,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:14:21,428 INFO L93 Difference]: Finished difference Result 1950 states and 3336 transitions. [2020-12-22 08:14:21,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:14:21,428 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 212 [2020-12-22 08:14:21,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:14:21,441 INFO L225 Difference]: With dead ends: 1950 [2020-12-22 08:14:21,441 INFO L226 Difference]: Without dead ends: 1585 [2020-12-22 08:14:21,444 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 08:14:21,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1585 states. [2020-12-22 08:14:21,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1585 to 1583. [2020-12-22 08:14:21,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1583 states. [2020-12-22 08:14:21,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1583 states to 1583 states and 2714 transitions. [2020-12-22 08:14:21,550 INFO L78 Accepts]: Start accepts. Automaton has 1583 states and 2714 transitions. Word has length 212 [2020-12-22 08:14:21,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:14:21,559 INFO L481 AbstractCegarLoop]: Abstraction has 1583 states and 2714 transitions. [2020-12-22 08:14:21,559 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:14:21,559 INFO L276 IsEmpty]: Start isEmpty. Operand 1583 states and 2714 transitions. [2020-12-22 08:14:21,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2020-12-22 08:14:21,564 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:14:21,564 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:14:21,565 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 08:14:21,565 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:14:21,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:14:21,566 INFO L82 PathProgramCache]: Analyzing trace with hash -640806259, now seen corresponding path program 1 times [2020-12-22 08:14:21,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:14:21,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109306056] [2020-12-22 08:14:21,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:14:21,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:14:21,778 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 08:14:21,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109306056] [2020-12-22 08:14:21,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:14:21,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:14:21,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174826561] [2020-12-22 08:14:21,782 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:14:21,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:14:21,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:14:21,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:14:21,783 INFO L87 Difference]: Start difference. First operand 1583 states and 2714 transitions. Second operand 3 states. [2020-12-22 08:14:21,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:14:21,909 INFO L93 Difference]: Finished difference Result 3523 states and 5970 transitions. [2020-12-22 08:14:21,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:14:21,910 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 212 [2020-12-22 08:14:21,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:14:21,923 INFO L225 Difference]: With dead ends: 3523 [2020-12-22 08:14:21,924 INFO L226 Difference]: Without dead ends: 2520 [2020-12-22 08:14:21,927 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 08:14:21,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2520 states. [2020-12-22 08:14:22,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2520 to 2518. [2020-12-22 08:14:22,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2518 states. [2020-12-22 08:14:22,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2518 states to 2518 states and 4272 transitions. [2020-12-22 08:14:22,071 INFO L78 Accepts]: Start accepts. Automaton has 2518 states and 4272 transitions. Word has length 212 [2020-12-22 08:14:22,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:14:22,071 INFO L481 AbstractCegarLoop]: Abstraction has 2518 states and 4272 transitions. [2020-12-22 08:14:22,072 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:14:22,072 INFO L276 IsEmpty]: Start isEmpty. Operand 2518 states and 4272 transitions. [2020-12-22 08:14:22,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2020-12-22 08:14:22,076 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:14:22,076 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:14:22,076 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 08:14:22,077 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:14:22,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:14:22,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1656526890, now seen corresponding path program 1 times [2020-12-22 08:14:22,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:14:22,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015728999] [2020-12-22 08:14:22,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:14:22,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:14:22,266 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 08:14:22,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015728999] [2020-12-22 08:14:22,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:14:22,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:14:22,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595911674] [2020-12-22 08:14:22,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:14:22,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:14:22,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:14:22,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:14:22,270 INFO L87 Difference]: Start difference. First operand 2518 states and 4272 transitions. Second operand 3 states. [2020-12-22 08:14:22,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:14:22,461 INFO L93 Difference]: Finished difference Result 6262 states and 10518 transitions. [2020-12-22 08:14:22,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:14:22,462 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 216 [2020-12-22 08:14:22,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:14:22,487 INFO L225 Difference]: With dead ends: 6262 [2020-12-22 08:14:22,487 INFO L226 Difference]: Without dead ends: 4324 [2020-12-22 08:14:22,495 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 08:14:22,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4324 states. [2020-12-22 08:14:22,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4324 to 4322. [2020-12-22 08:14:22,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4322 states. [2020-12-22 08:14:22,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4322 states to 4322 states and 7256 transitions. [2020-12-22 08:14:22,799 INFO L78 Accepts]: Start accepts. Automaton has 4322 states and 7256 transitions. Word has length 216 [2020-12-22 08:14:22,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:14:22,800 INFO L481 AbstractCegarLoop]: Abstraction has 4322 states and 7256 transitions. [2020-12-22 08:14:22,800 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:14:22,800 INFO L276 IsEmpty]: Start isEmpty. Operand 4322 states and 7256 transitions. [2020-12-22 08:14:22,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2020-12-22 08:14:22,806 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:14:22,807 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:14:22,807 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 08:14:22,807 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:14:22,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:14:22,808 INFO L82 PathProgramCache]: Analyzing trace with hash -759647818, now seen corresponding path program 1 times [2020-12-22 08:14:22,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:14:22,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450196254] [2020-12-22 08:14:22,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:14:22,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:14:23,049 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 08:14:23,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450196254] [2020-12-22 08:14:23,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:14:23,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:14:23,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820684177] [2020-12-22 08:14:23,051 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:14:23,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:14:23,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:14:23,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:14:23,053 INFO L87 Difference]: Start difference. First operand 4322 states and 7256 transitions. Second operand 3 states. [2020-12-22 08:14:23,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:14:23,338 INFO L93 Difference]: Finished difference Result 7918 states and 13272 transitions. [2020-12-22 08:14:23,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:14:23,338 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 220 [2020-12-22 08:14:23,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:14:23,372 INFO L225 Difference]: With dead ends: 7918 [2020-12-22 08:14:23,373 INFO L226 Difference]: Without dead ends: 5980 [2020-12-22 08:14:23,380 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 08:14:23,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5980 states. [2020-12-22 08:14:23,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5980 to 5978. [2020-12-22 08:14:23,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5978 states. [2020-12-22 08:14:23,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 10006 transitions. [2020-12-22 08:14:23,753 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 10006 transitions. Word has length 220 [2020-12-22 08:14:23,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:14:23,753 INFO L481 AbstractCegarLoop]: Abstraction has 5978 states and 10006 transitions. [2020-12-22 08:14:23,754 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:14:23,754 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 10006 transitions. [2020-12-22 08:14:23,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2020-12-22 08:14:23,758 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:14:23,758 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:14:23,759 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 08:14:23,759 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:14:23,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:14:23,759 INFO L82 PathProgramCache]: Analyzing trace with hash -808960211, now seen corresponding path program 1 times [2020-12-22 08:14:23,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:14:23,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012375264] [2020-12-22 08:14:23,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:14:23,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:14:23,922 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 08:14:23,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012375264] [2020-12-22 08:14:23,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:14:23,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:14:23,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496252641] [2020-12-22 08:14:23,924 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:14:23,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:14:23,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:14:23,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:14:23,925 INFO L87 Difference]: Start difference. First operand 5978 states and 10006 transitions. Second operand 3 states. [2020-12-22 08:14:24,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:14:24,473 INFO L93 Difference]: Finished difference Result 16146 states and 26844 transitions. [2020-12-22 08:14:24,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:14:24,474 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 220 [2020-12-22 08:14:24,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:14:24,547 INFO L225 Difference]: With dead ends: 16146 [2020-12-22 08:14:24,547 INFO L226 Difference]: Without dead ends: 10864 [2020-12-22 08:14:24,561 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 08:14:24,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10864 states. [2020-12-22 08:14:25,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10864 to 10862. [2020-12-22 08:14:25,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10862 states. [2020-12-22 08:14:25,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10862 states to 10862 states and 18010 transitions. [2020-12-22 08:14:25,194 INFO L78 Accepts]: Start accepts. Automaton has 10862 states and 18010 transitions. Word has length 220 [2020-12-22 08:14:25,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:14:25,195 INFO L481 AbstractCegarLoop]: Abstraction has 10862 states and 18010 transitions. [2020-12-22 08:14:25,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:14:25,195 INFO L276 IsEmpty]: Start isEmpty. Operand 10862 states and 18010 transitions. [2020-12-22 08:14:25,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2020-12-22 08:14:25,200 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:14:25,200 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:14:25,200 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 08:14:25,201 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:14:25,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:14:25,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1627459958, now seen corresponding path program 1 times [2020-12-22 08:14:25,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:14:25,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437763258] [2020-12-22 08:14:25,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:14:25,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:14:25,486 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 08:14:25,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437763258] [2020-12-22 08:14:25,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:14:25,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 08:14:25,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509051512] [2020-12-22 08:14:25,488 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 08:14:25,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:14:25,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 08:14:25,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:14:25,491 INFO L87 Difference]: Start difference. First operand 10862 states and 18010 transitions. Second operand 7 states. [2020-12-22 08:14:29,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:14:29,024 INFO L93 Difference]: Finished difference Result 72133 states and 119943 transitions. [2020-12-22 08:14:29,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 08:14:29,025 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 224 [2020-12-22 08:14:29,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:14:29,221 INFO L225 Difference]: With dead ends: 72133 [2020-12-22 08:14:29,222 INFO L226 Difference]: Without dead ends: 61967 [2020-12-22 08:14:29,261 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-12-22 08:14:29,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61967 states. [2020-12-22 08:14:31,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61967 to 20957. [2020-12-22 08:14:31,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20957 states. [2020-12-22 08:14:31,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20957 states to 20957 states and 34594 transitions. [2020-12-22 08:14:31,444 INFO L78 Accepts]: Start accepts. Automaton has 20957 states and 34594 transitions. Word has length 224 [2020-12-22 08:14:31,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:14:31,445 INFO L481 AbstractCegarLoop]: Abstraction has 20957 states and 34594 transitions. [2020-12-22 08:14:31,445 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 08:14:31,445 INFO L276 IsEmpty]: Start isEmpty. Operand 20957 states and 34594 transitions. [2020-12-22 08:14:31,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-12-22 08:14:31,451 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:14:31,452 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:14:31,452 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 08:14:31,453 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:14:31,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:14:31,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1016729105, now seen corresponding path program 1 times [2020-12-22 08:14:31,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:14:31,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051121541] [2020-12-22 08:14:31,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:14:31,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:14:31,779 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 08:14:31,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051121541] [2020-12-22 08:14:31,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:14:31,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:14:31,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162673675] [2020-12-22 08:14:31,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:14:31,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:14:31,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:14:31,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:14:31,788 INFO L87 Difference]: Start difference. First operand 20957 states and 34594 transitions. Second operand 4 states. [2020-12-22 08:14:33,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:14:33,690 INFO L93 Difference]: Finished difference Result 56884 states and 94261 transitions. [2020-12-22 08:14:33,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:14:33,691 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 225 [2020-12-22 08:14:33,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:14:33,779 INFO L225 Difference]: With dead ends: 56884 [2020-12-22 08:14:33,780 INFO L226 Difference]: Without dead ends: 36685 [2020-12-22 08:14:33,813 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:14:33,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36685 states. [2020-12-22 08:14:36,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36685 to 31436. [2020-12-22 08:14:36,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31436 states. [2020-12-22 08:14:36,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31436 states to 31436 states and 51980 transitions. [2020-12-22 08:14:36,374 INFO L78 Accepts]: Start accepts. Automaton has 31436 states and 51980 transitions. Word has length 225 [2020-12-22 08:14:36,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:14:36,375 INFO L481 AbstractCegarLoop]: Abstraction has 31436 states and 51980 transitions. [2020-12-22 08:14:36,375 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:14:36,375 INFO L276 IsEmpty]: Start isEmpty. Operand 31436 states and 51980 transitions. [2020-12-22 08:14:36,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-12-22 08:14:36,384 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:14:36,384 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:14:36,385 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 08:14:36,385 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:14:36,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:14:36,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1804910714, now seen corresponding path program 1 times [2020-12-22 08:14:36,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:14:36,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785674559] [2020-12-22 08:14:36,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:14:36,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:14:36,569 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 08:14:36,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785674559] [2020-12-22 08:14:36,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:14:36,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:14:36,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691669099] [2020-12-22 08:14:36,570 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:14:36,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:14:36,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:14:36,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:14:36,572 INFO L87 Difference]: Start difference. First operand 31436 states and 51980 transitions. Second operand 3 states. [2020-12-22 08:14:38,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:14:38,896 INFO L93 Difference]: Finished difference Result 60182 states and 99682 transitions. [2020-12-22 08:14:38,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:14:38,896 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 225 [2020-12-22 08:14:38,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:14:38,979 INFO L225 Difference]: With dead ends: 60182 [2020-12-22 08:14:38,979 INFO L226 Difference]: Without dead ends: 44142 [2020-12-22 08:14:39,013 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:14:39,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44142 states. [2020-12-22 08:14:41,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44142 to 44140. [2020-12-22 08:14:41,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44140 states. [2020-12-22 08:14:41,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44140 states to 44140 states and 72868 transitions. [2020-12-22 08:14:41,438 INFO L78 Accepts]: Start accepts. Automaton has 44140 states and 72868 transitions. Word has length 225 [2020-12-22 08:14:41,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:14:41,439 INFO L481 AbstractCegarLoop]: Abstraction has 44140 states and 72868 transitions. [2020-12-22 08:14:41,439 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:14:41,439 INFO L276 IsEmpty]: Start isEmpty. Operand 44140 states and 72868 transitions. [2020-12-22 08:14:41,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-12-22 08:14:41,444 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:14:41,444 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:14:41,445 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 08:14:41,445 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:14:41,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:14:41,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1252454586, now seen corresponding path program 1 times [2020-12-22 08:14:41,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:14:41,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178044786] [2020-12-22 08:14:41,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:14:41,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:14:41,587 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 08:14:41,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178044786] [2020-12-22 08:14:41,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:14:41,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:14:41,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514004541] [2020-12-22 08:14:41,589 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:14:41,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:14:41,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:14:41,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:14:41,590 INFO L87 Difference]: Start difference. First operand 44140 states and 72868 transitions. Second operand 3 states. [2020-12-22 08:14:44,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:14:44,571 INFO L93 Difference]: Finished difference Result 83942 states and 138912 transitions. [2020-12-22 08:14:44,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:14:44,572 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 225 [2020-12-22 08:14:44,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:14:44,667 INFO L225 Difference]: With dead ends: 83942 [2020-12-22 08:14:44,667 INFO L226 Difference]: Without dead ends: 61178 [2020-12-22 08:14:44,709 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 08:14:44,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61178 states. [2020-12-22 08:14:48,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61178 to 61176. [2020-12-22 08:14:48,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61176 states. [2020-12-22 08:14:48,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61176 states to 61176 states and 100885 transitions. [2020-12-22 08:14:48,332 INFO L78 Accepts]: Start accepts. Automaton has 61176 states and 100885 transitions. Word has length 225 [2020-12-22 08:14:48,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:14:48,332 INFO L481 AbstractCegarLoop]: Abstraction has 61176 states and 100885 transitions. [2020-12-22 08:14:48,333 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:14:48,333 INFO L276 IsEmpty]: Start isEmpty. Operand 61176 states and 100885 transitions. [2020-12-22 08:14:48,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-12-22 08:14:48,336 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:14:48,336 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:14:48,336 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 08:14:48,337 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:14:48,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:14:48,337 INFO L82 PathProgramCache]: Analyzing trace with hash -948926046, now seen corresponding path program 1 times [2020-12-22 08:14:48,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:14:48,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198221883] [2020-12-22 08:14:48,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:14:48,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:14:48,509 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 08:14:48,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198221883] [2020-12-22 08:14:48,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:14:48,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:14:48,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019621556] [2020-12-22 08:14:48,510 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:14:48,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:14:48,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:14:48,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:14:48,512 INFO L87 Difference]: Start difference. First operand 61176 states and 100885 transitions. Second operand 3 states. [2020-12-22 08:14:53,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:14:53,361 INFO L93 Difference]: Finished difference Result 133880 states and 222085 transitions. [2020-12-22 08:14:53,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:14:53,361 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 225 [2020-12-22 08:14:53,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:14:53,512 INFO L225 Difference]: With dead ends: 133880 [2020-12-22 08:14:53,513 INFO L226 Difference]: Without dead ends: 92056 [2020-12-22 08:14:53,558 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 08:14:53,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92056 states. [2020-12-22 08:14:58,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92056 to 92054. [2020-12-22 08:14:58,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92054 states. [2020-12-22 08:14:59,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92054 states to 92054 states and 151936 transitions. [2020-12-22 08:14:59,076 INFO L78 Accepts]: Start accepts. Automaton has 92054 states and 151936 transitions. Word has length 225 [2020-12-22 08:14:59,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:14:59,077 INFO L481 AbstractCegarLoop]: Abstraction has 92054 states and 151936 transitions. [2020-12-22 08:14:59,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:14:59,078 INFO L276 IsEmpty]: Start isEmpty. Operand 92054 states and 151936 transitions. [2020-12-22 08:14:59,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2020-12-22 08:14:59,081 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:14:59,081 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:14:59,081 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 08:14:59,085 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:14:59,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:14:59,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1386769457, now seen corresponding path program 1 times [2020-12-22 08:14:59,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:14:59,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918561682] [2020-12-22 08:14:59,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:14:59,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:14:59,313 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 08:14:59,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918561682] [2020-12-22 08:14:59,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:14:59,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:14:59,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945412452] [2020-12-22 08:14:59,315 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:14:59,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:14:59,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:14:59,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:14:59,316 INFO L87 Difference]: Start difference. First operand 92054 states and 151936 transitions. Second operand 4 states. [2020-12-22 08:15:09,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:15:09,252 INFO L93 Difference]: Finished difference Result 272316 states and 450326 transitions. [2020-12-22 08:15:09,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:15:09,253 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 226 [2020-12-22 08:15:09,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:15:09,602 INFO L225 Difference]: With dead ends: 272316 [2020-12-22 08:15:09,603 INFO L226 Difference]: Without dead ends: 180899 [2020-12-22 08:15:09,699 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:15:10,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180899 states. [2020-12-22 08:15:18,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180899 to 151260. [2020-12-22 08:15:18,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151260 states. [2020-12-22 08:15:19,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151260 states to 151260 states and 249206 transitions. [2020-12-22 08:15:19,072 INFO L78 Accepts]: Start accepts. Automaton has 151260 states and 249206 transitions. Word has length 226 [2020-12-22 08:15:19,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:15:19,072 INFO L481 AbstractCegarLoop]: Abstraction has 151260 states and 249206 transitions. [2020-12-22 08:15:19,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:15:19,073 INFO L276 IsEmpty]: Start isEmpty. Operand 151260 states and 249206 transitions. [2020-12-22 08:15:19,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2020-12-22 08:15:19,074 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:15:19,074 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:15:19,075 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 08:15:19,075 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:15:19,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:15:19,075 INFO L82 PathProgramCache]: Analyzing trace with hash -22323496, now seen corresponding path program 1 times [2020-12-22 08:15:19,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:15:19,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845944803] [2020-12-22 08:15:19,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:15:19,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:15:19,234 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 08:15:19,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845944803] [2020-12-22 08:15:19,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:15:19,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:15:19,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995456105] [2020-12-22 08:15:19,236 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:15:19,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:15:19,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:15:19,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:15:19,237 INFO L87 Difference]: Start difference. First operand 151260 states and 249206 transitions. Second operand 4 states. [2020-12-22 08:15:36,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:15:36,565 INFO L93 Difference]: Finished difference Result 446874 states and 737768 transitions. [2020-12-22 08:15:36,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:15:36,566 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 227 [2020-12-22 08:15:36,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:15:37,405 INFO L225 Difference]: With dead ends: 446874 [2020-12-22 08:15:37,405 INFO L226 Difference]: Without dead ends: 296251 [2020-12-22 08:15:37,592 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:15:37,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296251 states. [2020-12-22 08:15:52,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296251 to 248190. [2020-12-22 08:15:52,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248190 states. [2020-12-22 08:15:53,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248190 states to 248190 states and 408188 transitions. [2020-12-22 08:15:53,424 INFO L78 Accepts]: Start accepts. Automaton has 248190 states and 408188 transitions. Word has length 227 [2020-12-22 08:15:53,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:15:53,425 INFO L481 AbstractCegarLoop]: Abstraction has 248190 states and 408188 transitions. [2020-12-22 08:15:53,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:15:53,425 INFO L276 IsEmpty]: Start isEmpty. Operand 248190 states and 408188 transitions. [2020-12-22 08:15:53,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2020-12-22 08:15:53,442 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:15:53,442 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:15:53,443 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 08:15:53,443 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:15:53,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:15:53,443 INFO L82 PathProgramCache]: Analyzing trace with hash -749974056, now seen corresponding path program 1 times [2020-12-22 08:15:53,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:15:53,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302411418] [2020-12-22 08:15:53,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:15:53,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:15:53,999 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 08:15:54,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302411418] [2020-12-22 08:15:54,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:15:54,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:15:54,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195465869] [2020-12-22 08:15:54,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:15:54,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:15:54,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:15:54,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:15:54,003 INFO L87 Difference]: Start difference. First operand 248190 states and 408188 transitions. Second operand 4 states.