/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/combinations/pals_lcr.8.ufo.BOUNDED-16.pals+Problem12_label01.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 10:21:02,357 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 10:21:02,359 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 10:21:02,394 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 10:21:02,395 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 10:21:02,397 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 10:21:02,398 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 10:21:02,401 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 10:21:02,403 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 10:21:02,404 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 10:21:02,405 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 10:21:02,407 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 10:21:02,407 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 10:21:02,408 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 10:21:02,410 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 10:21:02,411 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 10:21:02,412 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 10:21:02,413 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 10:21:02,415 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 10:21:02,427 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 10:21:02,429 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 10:21:02,430 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 10:21:02,431 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 10:21:02,432 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 10:21:02,435 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 10:21:02,445 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 10:21:02,446 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 10:21:02,447 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 10:21:02,448 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 10:21:02,475 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 10:21:02,476 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 10:21:02,477 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 10:21:02,478 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 10:21:02,478 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 10:21:02,478 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 10:21:02,479 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 10:21:02,479 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 10:21:02,479 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 10:21:02,480 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 10:21:02,480 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 10:21:02,480 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 10:21:02,480 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 10:21:02,481 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 10:21:02,481 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 10:21:02,481 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 10:21:02,481 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 10:21:02,482 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 10:21:02,482 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 10:21:02,482 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 10:21:02,483 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 10:21:02,483 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 10:21:02,483 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 10:21:02,483 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 10:21:02,484 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 10:21:02,484 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 10:21:02,837 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 10:21:02,869 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 10:21:02,874 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 10:21:02,876 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 10:21:02,876 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 10:21:02,877 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.8.ufo.BOUNDED-16.pals+Problem12_label01.c [2020-12-22 10:21:02,954 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/926c55cfe/3b93dc40305e49a385c4e99745ec2265/FLAG5a8cddf4b [2020-12-22 10:21:03,856 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 10:21:03,857 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.8.ufo.BOUNDED-16.pals+Problem12_label01.c [2020-12-22 10:21:03,911 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/926c55cfe/3b93dc40305e49a385c4e99745ec2265/FLAG5a8cddf4b [2020-12-22 10:21:04,404 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/926c55cfe/3b93dc40305e49a385c4e99745ec2265 [2020-12-22 10:21:04,407 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 10:21:04,410 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 10:21:04,414 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 10:21:04,415 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 10:21:04,419 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 10:21:04,420 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:21:04" (1/1) ... [2020-12-22 10:21:04,422 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60cfab84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:21:04, skipping insertion in model container [2020-12-22 10:21:04,422 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:21:04" (1/1) ... [2020-12-22 10:21:04,432 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 10:21:04,638 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 10:21:05,033 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.8.ufo.BOUNDED-16.pals+Problem12_label01.c[26847,26860] [2020-12-22 10:21:05,125 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.8.ufo.BOUNDED-16.pals+Problem12_label01.c[32159,32172] [2020-12-22 10:21:05,966 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:21:05,983 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 10:21:06,076 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.8.ufo.BOUNDED-16.pals+Problem12_label01.c[26847,26860] [2020-12-22 10:21:06,096 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.8.ufo.BOUNDED-16.pals+Problem12_label01.c[32159,32172] [2020-12-22 10:21:06,694 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:21:06,764 INFO L208 MainTranslator]: Completed translation [2020-12-22 10:21:06,765 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:21:06 WrapperNode [2020-12-22 10:21:06,766 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 10:21:06,767 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 10:21:06,767 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 10:21:06,774 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 10:21:06,783 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:21:06" (1/1) ... [2020-12-22 10:21:06,868 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:21:06" (1/1) ... [2020-12-22 10:21:07,329 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 10:21:07,330 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 10:21:07,330 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 10:21:07,330 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 10:21:07,339 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:21:06" (1/1) ... [2020-12-22 10:21:07,339 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:21:06" (1/1) ... [2020-12-22 10:21:07,391 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:21:06" (1/1) ... [2020-12-22 10:21:07,391 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:21:06" (1/1) ... [2020-12-22 10:21:07,606 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:21:06" (1/1) ... [2020-12-22 10:21:07,652 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:21:06" (1/1) ... [2020-12-22 10:21:07,701 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:21:06" (1/1) ... [2020-12-22 10:21:07,834 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 10:21:07,836 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 10:21:07,836 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 10:21:07,836 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 10:21:07,837 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:21:06" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 10:21:07,943 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 10:21:07,943 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 10:21:07,943 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 10:21:07,944 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 10:21:13,384 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 10:21:13,385 INFO L299 CfgBuilder]: Removed 42 assume(true) statements. [2020-12-22 10:21:13,388 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:21:13 BoogieIcfgContainer [2020-12-22 10:21:13,389 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 10:21:13,390 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 10:21:13,390 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 10:21:13,394 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 10:21:13,395 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 10:21:04" (1/3) ... [2020-12-22 10:21:13,395 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c8b7cfd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:21:13, skipping insertion in model container [2020-12-22 10:21:13,396 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:21:06" (2/3) ... [2020-12-22 10:21:13,396 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c8b7cfd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:21:13, skipping insertion in model container [2020-12-22 10:21:13,396 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:21:13" (3/3) ... [2020-12-22 10:21:13,398 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.8.ufo.BOUNDED-16.pals+Problem12_label01.c [2020-12-22 10:21:13,405 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 10:21:13,412 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 10:21:13,431 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 10:21:13,466 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 10:21:13,466 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 10:21:13,466 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 10:21:13,467 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 10:21:13,467 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 10:21:13,467 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 10:21:13,467 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 10:21:13,467 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 10:21:13,502 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states. [2020-12-22 10:21:13,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-22 10:21:13,514 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:21:13,515 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] [2020-12-22 10:21:13,515 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:21:13,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:21:13,522 INFO L82 PathProgramCache]: Analyzing trace with hash -2107180874, now seen corresponding path program 1 times [2020-12-22 10:21:13,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:21:13,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941227445] [2020-12-22 10:21:13,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:21:13,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:21:13,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:21:13,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941227445] [2020-12-22 10:21:13,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:21:13,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:21:13,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202641640] [2020-12-22 10:21:13,933 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 10:21:13,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:21:13,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 10:21:13,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 10:21:13,957 INFO L87 Difference]: Start difference. First operand 963 states. Second operand 2 states. [2020-12-22 10:21:14,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:21:14,064 INFO L93 Difference]: Finished difference Result 1859 states and 3512 transitions. [2020-12-22 10:21:14,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 10:21:14,066 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 46 [2020-12-22 10:21:14,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:21:14,120 INFO L225 Difference]: With dead ends: 1859 [2020-12-22 10:21:14,121 INFO L226 Difference]: Without dead ends: 897 [2020-12-22 10:21:14,134 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 10:21:14,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2020-12-22 10:21:14,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 897. [2020-12-22 10:21:14,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 897 states. [2020-12-22 10:21:14,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 1688 transitions. [2020-12-22 10:21:14,283 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 1688 transitions. Word has length 46 [2020-12-22 10:21:14,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:21:14,283 INFO L481 AbstractCegarLoop]: Abstraction has 897 states and 1688 transitions. [2020-12-22 10:21:14,283 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 10:21:14,283 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 1688 transitions. [2020-12-22 10:21:14,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-22 10:21:14,288 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:21:14,288 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] [2020-12-22 10:21:14,289 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 10:21:14,290 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:21:14,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:21:14,291 INFO L82 PathProgramCache]: Analyzing trace with hash 815979124, now seen corresponding path program 1 times [2020-12-22 10:21:14,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:21:14,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79293021] [2020-12-22 10:21:14,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:21:14,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:21:14,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:21:14,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79293021] [2020-12-22 10:21:14,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:21:14,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:21:14,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082818189] [2020-12-22 10:21:14,484 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 10:21:14,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:21:14,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 10:21:14,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:21:14,485 INFO L87 Difference]: Start difference. First operand 897 states and 1688 transitions. Second operand 5 states. [2020-12-22 10:21:14,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:21:14,683 INFO L93 Difference]: Finished difference Result 977 states and 1813 transitions. [2020-12-22 10:21:14,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 10:21:14,683 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 46 [2020-12-22 10:21:14,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:21:14,690 INFO L225 Difference]: With dead ends: 977 [2020-12-22 10:21:14,690 INFO L226 Difference]: Without dead ends: 897 [2020-12-22 10:21:14,692 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 10:21:14,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2020-12-22 10:21:14,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 897. [2020-12-22 10:21:14,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 897 states. [2020-12-22 10:21:14,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 1627 transitions. [2020-12-22 10:21:14,722 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 1627 transitions. Word has length 46 [2020-12-22 10:21:14,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:21:14,722 INFO L481 AbstractCegarLoop]: Abstraction has 897 states and 1627 transitions. [2020-12-22 10:21:14,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 10:21:14,722 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 1627 transitions. [2020-12-22 10:21:14,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-22 10:21:14,724 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:21:14,724 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] [2020-12-22 10:21:14,725 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 10:21:14,725 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:21:14,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:21:14,726 INFO L82 PathProgramCache]: Analyzing trace with hash 555727445, now seen corresponding path program 1 times [2020-12-22 10:21:14,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:21:14,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055378320] [2020-12-22 10:21:14,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:21:14,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:21:14,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:21:14,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055378320] [2020-12-22 10:21:14,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:21:14,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:21:14,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022248048] [2020-12-22 10:21:14,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:21:14,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:21:14,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:21:14,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:21:14,874 INFO L87 Difference]: Start difference. First operand 897 states and 1627 transitions. Second operand 3 states. [2020-12-22 10:21:21,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:21:21,047 INFO L93 Difference]: Finished difference Result 2401 states and 4500 transitions. [2020-12-22 10:21:21,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:21:21,048 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 48 [2020-12-22 10:21:21,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:21:21,060 INFO L225 Difference]: With dead ends: 2401 [2020-12-22 10:21:21,060 INFO L226 Difference]: Without dead ends: 1648 [2020-12-22 10:21:21,062 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:21:21,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1648 states. [2020-12-22 10:21:21,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1648 to 1648. [2020-12-22 10:21:21,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1648 states. [2020-12-22 10:21:21,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1648 states to 1648 states and 3002 transitions. [2020-12-22 10:21:21,108 INFO L78 Accepts]: Start accepts. Automaton has 1648 states and 3002 transitions. Word has length 48 [2020-12-22 10:21:21,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:21:21,109 INFO L481 AbstractCegarLoop]: Abstraction has 1648 states and 3002 transitions. [2020-12-22 10:21:21,109 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:21:21,109 INFO L276 IsEmpty]: Start isEmpty. Operand 1648 states and 3002 transitions. [2020-12-22 10:21:21,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:21:21,111 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:21:21,112 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] [2020-12-22 10:21:21,112 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 10:21:21,112 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:21:21,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:21:21,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1090783836, now seen corresponding path program 1 times [2020-12-22 10:21:21,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:21:21,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450281534] [2020-12-22 10:21:21,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:21:21,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:21:21,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:21:21,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450281534] [2020-12-22 10:21:21,251 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:21:21,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:21:21,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561014033] [2020-12-22 10:21:21,252 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:21:21,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:21:21,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:21:21,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:21:21,254 INFO L87 Difference]: Start difference. First operand 1648 states and 3002 transitions. Second operand 3 states. [2020-12-22 10:21:21,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:21:21,300 INFO L93 Difference]: Finished difference Result 1794 states and 3234 transitions. [2020-12-22 10:21:21,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:21:21,301 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:21:21,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:21:21,314 INFO L225 Difference]: With dead ends: 1794 [2020-12-22 10:21:21,314 INFO L226 Difference]: Without dead ends: 1718 [2020-12-22 10:21:21,316 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:21:21,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1718 states. [2020-12-22 10:21:21,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1718 to 1716. [2020-12-22 10:21:21,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1716 states. [2020-12-22 10:21:21,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1716 states to 1716 states and 3111 transitions. [2020-12-22 10:21:21,366 INFO L78 Accepts]: Start accepts. Automaton has 1716 states and 3111 transitions. Word has length 106 [2020-12-22 10:21:21,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:21:21,367 INFO L481 AbstractCegarLoop]: Abstraction has 1716 states and 3111 transitions. [2020-12-22 10:21:21,367 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:21:21,367 INFO L276 IsEmpty]: Start isEmpty. Operand 1716 states and 3111 transitions. [2020-12-22 10:21:21,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:21:21,368 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:21:21,369 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] [2020-12-22 10:21:21,369 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 10:21:21,369 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:21:21,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:21:21,370 INFO L82 PathProgramCache]: Analyzing trace with hash 326222874, now seen corresponding path program 1 times [2020-12-22 10:21:21,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:21:21,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997139695] [2020-12-22 10:21:21,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:21:21,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:21:21,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:21:21,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997139695] [2020-12-22 10:21:21,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:21:21,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:21:21,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738228962] [2020-12-22 10:21:21,475 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:21:21,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:21:21,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:21:21,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:21:21,476 INFO L87 Difference]: Start difference. First operand 1716 states and 3111 transitions. Second operand 3 states. [2020-12-22 10:21:21,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:21:21,528 INFO L93 Difference]: Finished difference Result 1992 states and 3551 transitions. [2020-12-22 10:21:21,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:21:21,529 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:21:21,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:21:21,542 INFO L225 Difference]: With dead ends: 1992 [2020-12-22 10:21:21,543 INFO L226 Difference]: Without dead ends: 1848 [2020-12-22 10:21:21,544 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:21:21,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1848 states. [2020-12-22 10:21:21,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1848 to 1846. [2020-12-22 10:21:21,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1846 states. [2020-12-22 10:21:21,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1846 states to 1846 states and 3318 transitions. [2020-12-22 10:21:21,611 INFO L78 Accepts]: Start accepts. Automaton has 1846 states and 3318 transitions. Word has length 106 [2020-12-22 10:21:21,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:21:21,612 INFO L481 AbstractCegarLoop]: Abstraction has 1846 states and 3318 transitions. [2020-12-22 10:21:21,612 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:21:21,612 INFO L276 IsEmpty]: Start isEmpty. Operand 1846 states and 3318 transitions. [2020-12-22 10:21:21,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:21:21,619 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:21:21,620 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] [2020-12-22 10:21:21,620 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 10:21:21,620 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:21:21,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:21:21,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1573731728, now seen corresponding path program 1 times [2020-12-22 10:21:21,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:21:21,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560901091] [2020-12-22 10:21:21,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:21:21,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:21:21,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:21:21,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560901091] [2020-12-22 10:21:21,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:21:21,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:21:21,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767081648] [2020-12-22 10:21:21,792 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:21:21,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:21:21,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:21:21,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:21:21,793 INFO L87 Difference]: Start difference. First operand 1846 states and 3318 transitions. Second operand 3 states. [2020-12-22 10:21:21,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:21:21,856 INFO L93 Difference]: Finished difference Result 2370 states and 4152 transitions. [2020-12-22 10:21:21,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:21:21,857 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:21:21,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:21:21,873 INFO L225 Difference]: With dead ends: 2370 [2020-12-22 10:21:21,874 INFO L226 Difference]: Without dead ends: 2096 [2020-12-22 10:21:21,876 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:21:21,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2096 states. [2020-12-22 10:21:21,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2096 to 2094. [2020-12-22 10:21:21,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2094 states. [2020-12-22 10:21:21,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2094 states to 2094 states and 3710 transitions. [2020-12-22 10:21:21,944 INFO L78 Accepts]: Start accepts. Automaton has 2094 states and 3710 transitions. Word has length 106 [2020-12-22 10:21:21,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:21:21,945 INFO L481 AbstractCegarLoop]: Abstraction has 2094 states and 3710 transitions. [2020-12-22 10:21:21,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:21:21,945 INFO L276 IsEmpty]: Start isEmpty. Operand 2094 states and 3710 transitions. [2020-12-22 10:21:21,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:21:21,947 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:21:21,947 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] [2020-12-22 10:21:21,947 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 10:21:21,948 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:21:21,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:21:21,952 INFO L82 PathProgramCache]: Analyzing trace with hash 832299526, now seen corresponding path program 1 times [2020-12-22 10:21:21,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:21:21,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563367452] [2020-12-22 10:21:21,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:21:21,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:21:22,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:21:22,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563367452] [2020-12-22 10:21:22,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:21:22,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:21:22,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791631317] [2020-12-22 10:21:22,171 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:21:22,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:21:22,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:21:22,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:21:22,173 INFO L87 Difference]: Start difference. First operand 2094 states and 3710 transitions. Second operand 3 states. [2020-12-22 10:21:22,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:21:22,241 INFO L93 Difference]: Finished difference Result 3090 states and 5288 transitions. [2020-12-22 10:21:22,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:21:22,242 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:21:22,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:21:22,257 INFO L225 Difference]: With dead ends: 3090 [2020-12-22 10:21:22,258 INFO L226 Difference]: Without dead ends: 2568 [2020-12-22 10:21:22,261 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:21:22,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2568 states. [2020-12-22 10:21:22,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2568 to 2566. [2020-12-22 10:21:22,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2566 states. [2020-12-22 10:21:22,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2566 states to 2566 states and 4450 transitions. [2020-12-22 10:21:22,344 INFO L78 Accepts]: Start accepts. Automaton has 2566 states and 4450 transitions. Word has length 106 [2020-12-22 10:21:22,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:21:22,345 INFO L481 AbstractCegarLoop]: Abstraction has 2566 states and 4450 transitions. [2020-12-22 10:21:22,345 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:21:22,345 INFO L276 IsEmpty]: Start isEmpty. Operand 2566 states and 4450 transitions. [2020-12-22 10:21:22,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:21:22,346 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:21:22,346 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] [2020-12-22 10:21:22,347 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 10:21:22,347 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:21:22,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:21:22,347 INFO L82 PathProgramCache]: Analyzing trace with hash 2050284924, now seen corresponding path program 1 times [2020-12-22 10:21:22,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:21:22,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554606175] [2020-12-22 10:21:22,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:21:22,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:21:22,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:21:22,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554606175] [2020-12-22 10:21:22,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:21:22,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:21:22,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443866199] [2020-12-22 10:21:22,570 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:21:22,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:21:22,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:21:22,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:21:22,573 INFO L87 Difference]: Start difference. First operand 2566 states and 4450 transitions. Second operand 10 states. [2020-12-22 10:21:23,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:21:23,782 INFO L93 Difference]: Finished difference Result 18470 states and 29554 transitions. [2020-12-22 10:21:23,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 10:21:23,783 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 106 [2020-12-22 10:21:23,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:21:23,889 INFO L225 Difference]: With dead ends: 18470 [2020-12-22 10:21:23,890 INFO L226 Difference]: Without dead ends: 17476 [2020-12-22 10:21:23,901 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2020-12-22 10:21:23,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17476 states. [2020-12-22 10:21:24,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17476 to 3558. [2020-12-22 10:21:24,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3558 states. [2020-12-22 10:21:24,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3558 states to 3558 states and 5986 transitions. [2020-12-22 10:21:24,253 INFO L78 Accepts]: Start accepts. Automaton has 3558 states and 5986 transitions. Word has length 106 [2020-12-22 10:21:24,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:21:24,253 INFO L481 AbstractCegarLoop]: Abstraction has 3558 states and 5986 transitions. [2020-12-22 10:21:24,253 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:21:24,254 INFO L276 IsEmpty]: Start isEmpty. Operand 3558 states and 5986 transitions. [2020-12-22 10:21:24,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:21:24,255 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:21:24,255 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] [2020-12-22 10:21:24,255 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 10:21:24,255 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:21:24,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:21:24,256 INFO L82 PathProgramCache]: Analyzing trace with hash 1813103660, now seen corresponding path program 1 times [2020-12-22 10:21:24,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:21:24,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207454040] [2020-12-22 10:21:24,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:21:24,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:21:24,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:21:24,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207454040] [2020-12-22 10:21:24,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:21:24,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:21:24,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609052555] [2020-12-22 10:21:24,372 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:21:24,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:21:24,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:21:24,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:21:24,373 INFO L87 Difference]: Start difference. First operand 3558 states and 5986 transitions. Second operand 3 states. [2020-12-22 10:21:24,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:21:24,613 INFO L93 Difference]: Finished difference Result 6500 states and 10582 transitions. [2020-12-22 10:21:24,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:21:24,615 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2020-12-22 10:21:24,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:21:24,629 INFO L225 Difference]: With dead ends: 6500 [2020-12-22 10:21:24,629 INFO L226 Difference]: Without dead ends: 4514 [2020-12-22 10:21:24,634 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:21:24,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4514 states. [2020-12-22 10:21:24,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4514 to 4512. [2020-12-22 10:21:24,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4512 states. [2020-12-22 10:21:24,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4512 states to 4512 states and 7452 transitions. [2020-12-22 10:21:24,980 INFO L78 Accepts]: Start accepts. Automaton has 4512 states and 7452 transitions. Word has length 108 [2020-12-22 10:21:24,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:21:24,980 INFO L481 AbstractCegarLoop]: Abstraction has 4512 states and 7452 transitions. [2020-12-22 10:21:24,981 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:21:24,981 INFO L276 IsEmpty]: Start isEmpty. Operand 4512 states and 7452 transitions. [2020-12-22 10:21:24,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:21:24,982 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:21:24,983 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] [2020-12-22 10:21:24,983 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 10:21:24,983 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:21:24,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:21:24,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1879597172, now seen corresponding path program 1 times [2020-12-22 10:21:24,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:21:24,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415802970] [2020-12-22 10:21:24,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:21:25,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:21:25,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:21:25,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415802970] [2020-12-22 10:21:25,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:21:25,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:21:25,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398946361] [2020-12-22 10:21:25,456 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:21:25,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:21:25,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:21:25,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:21:25,457 INFO L87 Difference]: Start difference. First operand 4512 states and 7452 transitions. Second operand 10 states. [2020-12-22 10:21:26,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:21:26,385 INFO L93 Difference]: Finished difference Result 7452 states and 12022 transitions. [2020-12-22 10:21:26,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:21:26,386 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 108 [2020-12-22 10:21:26,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:21:26,398 INFO L225 Difference]: With dead ends: 7452 [2020-12-22 10:21:26,399 INFO L226 Difference]: Without dead ends: 4514 [2020-12-22 10:21:26,405 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:21:26,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4514 states. [2020-12-22 10:21:26,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4514 to 4512. [2020-12-22 10:21:26,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4512 states. [2020-12-22 10:21:26,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4512 states to 4512 states and 7428 transitions. [2020-12-22 10:21:26,685 INFO L78 Accepts]: Start accepts. Automaton has 4512 states and 7428 transitions. Word has length 108 [2020-12-22 10:21:26,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:21:26,686 INFO L481 AbstractCegarLoop]: Abstraction has 4512 states and 7428 transitions. [2020-12-22 10:21:26,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:21:26,686 INFO L276 IsEmpty]: Start isEmpty. Operand 4512 states and 7428 transitions. [2020-12-22 10:21:26,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:21:26,688 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:21:26,688 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:21:26,688 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 10:21:26,688 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:21:26,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:21:26,689 INFO L82 PathProgramCache]: Analyzing trace with hash 621051568, now seen corresponding path program 1 times [2020-12-22 10:21:26,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:21:26,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934711005] [2020-12-22 10:21:26,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:21:26,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:21:26,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:21:26,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934711005] [2020-12-22 10:21:26,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:21:26,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:21:26,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239524273] [2020-12-22 10:21:26,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:21:26,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:21:26,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:21:26,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:21:26,787 INFO L87 Difference]: Start difference. First operand 4512 states and 7428 transitions. Second operand 3 states. [2020-12-22 10:21:27,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:21:27,218 INFO L93 Difference]: Finished difference Result 10100 states and 16038 transitions. [2020-12-22 10:21:27,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:21:27,219 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2020-12-22 10:21:27,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:21:27,240 INFO L225 Difference]: With dead ends: 10100 [2020-12-22 10:21:27,241 INFO L226 Difference]: Without dead ends: 7162 [2020-12-22 10:21:27,249 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:21:27,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7162 states. [2020-12-22 10:21:27,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7162 to 7160. [2020-12-22 10:21:27,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7160 states. [2020-12-22 10:21:27,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7160 states to 7160 states and 11444 transitions. [2020-12-22 10:21:27,917 INFO L78 Accepts]: Start accepts. Automaton has 7160 states and 11444 transitions. Word has length 108 [2020-12-22 10:21:27,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:21:27,918 INFO L481 AbstractCegarLoop]: Abstraction has 7160 states and 11444 transitions. [2020-12-22 10:21:27,918 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:21:27,918 INFO L276 IsEmpty]: Start isEmpty. Operand 7160 states and 11444 transitions. [2020-12-22 10:21:27,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:21:27,920 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:21:27,920 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] [2020-12-22 10:21:27,920 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 10:21:27,920 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:21:27,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:21:27,921 INFO L82 PathProgramCache]: Analyzing trace with hash 894739280, now seen corresponding path program 1 times [2020-12-22 10:21:27,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:21:27,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424395690] [2020-12-22 10:21:27,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:21:27,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:21:28,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:21:28,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424395690] [2020-12-22 10:21:28,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:21:28,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:21:28,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882807998] [2020-12-22 10:21:28,025 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:21:28,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:21:28,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:21:28,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:21:28,026 INFO L87 Difference]: Start difference. First operand 7160 states and 11444 transitions. Second operand 3 states. [2020-12-22 10:21:28,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:21:28,730 INFO L93 Difference]: Finished difference Result 17756 states and 27606 transitions. [2020-12-22 10:21:28,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:21:28,731 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2020-12-22 10:21:28,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:21:28,760 INFO L225 Difference]: With dead ends: 17756 [2020-12-22 10:21:28,761 INFO L226 Difference]: Without dead ends: 12170 [2020-12-22 10:21:28,773 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:21:28,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12170 states. [2020-12-22 10:21:29,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12170 to 12168. [2020-12-22 10:21:29,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12168 states. [2020-12-22 10:21:29,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12168 states to 12168 states and 18948 transitions. [2020-12-22 10:21:29,629 INFO L78 Accepts]: Start accepts. Automaton has 12168 states and 18948 transitions. Word has length 108 [2020-12-22 10:21:29,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:21:29,630 INFO L481 AbstractCegarLoop]: Abstraction has 12168 states and 18948 transitions. [2020-12-22 10:21:29,630 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:21:29,630 INFO L276 IsEmpty]: Start isEmpty. Operand 12168 states and 18948 transitions. [2020-12-22 10:21:29,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:21:29,631 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:21:29,632 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] [2020-12-22 10:21:29,632 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 10:21:29,632 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:21:29,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:21:29,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1581156368, now seen corresponding path program 1 times [2020-12-22 10:21:29,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:21:29,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845118070] [2020-12-22 10:21:29,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:21:29,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:21:29,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:21:29,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845118070] [2020-12-22 10:21:29,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:21:29,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:21:29,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474668738] [2020-12-22 10:21:29,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:21:29,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:21:29,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:21:29,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:21:29,739 INFO L87 Difference]: Start difference. First operand 12168 states and 18948 transitions. Second operand 3 states. [2020-12-22 10:21:30,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:21:30,848 INFO L93 Difference]: Finished difference Result 32204 states and 49158 transitions. [2020-12-22 10:21:30,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:21:30,849 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2020-12-22 10:21:30,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:21:30,906 INFO L225 Difference]: With dead ends: 32204 [2020-12-22 10:21:30,906 INFO L226 Difference]: Without dead ends: 21610 [2020-12-22 10:21:30,930 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:21:30,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21610 states. [2020-12-22 10:21:32,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21610 to 21608. [2020-12-22 10:21:32,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21608 states. [2020-12-22 10:21:32,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21608 states to 21608 states and 32900 transitions. [2020-12-22 10:21:32,434 INFO L78 Accepts]: Start accepts. Automaton has 21608 states and 32900 transitions. Word has length 108 [2020-12-22 10:21:32,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:21:32,435 INFO L481 AbstractCegarLoop]: Abstraction has 21608 states and 32900 transitions. [2020-12-22 10:21:32,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:21:32,435 INFO L276 IsEmpty]: Start isEmpty. Operand 21608 states and 32900 transitions. [2020-12-22 10:21:32,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:21:32,437 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:21:32,437 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] [2020-12-22 10:21:32,437 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 10:21:32,437 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:21:32,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:21:32,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1401750384, now seen corresponding path program 1 times [2020-12-22 10:21:32,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:21:32,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071915877] [2020-12-22 10:21:32,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:21:32,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:21:32,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:21:32,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071915877] [2020-12-22 10:21:32,538 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:21:32,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:21:32,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326887307] [2020-12-22 10:21:32,539 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:21:32,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:21:32,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:21:32,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:21:32,540 INFO L87 Difference]: Start difference. First operand 21608 states and 32900 transitions. Second operand 3 states. [2020-12-22 10:21:34,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:21:34,891 INFO L93 Difference]: Finished difference Result 59372 states and 89094 transitions. [2020-12-22 10:21:34,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:21:34,892 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2020-12-22 10:21:34,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:21:34,982 INFO L225 Difference]: With dead ends: 59372 [2020-12-22 10:21:34,982 INFO L226 Difference]: Without dead ends: 39338 [2020-12-22 10:21:35,012 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:21:35,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39338 states. [2020-12-22 10:21:37,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39338 to 39336. [2020-12-22 10:21:37,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39336 states. [2020-12-22 10:21:37,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39336 states to 39336 states and 58692 transitions. [2020-12-22 10:21:37,472 INFO L78 Accepts]: Start accepts. Automaton has 39336 states and 58692 transitions. Word has length 108 [2020-12-22 10:21:37,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:21:37,472 INFO L481 AbstractCegarLoop]: Abstraction has 39336 states and 58692 transitions. [2020-12-22 10:21:37,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:21:37,473 INFO L276 IsEmpty]: Start isEmpty. Operand 39336 states and 58692 transitions. [2020-12-22 10:21:37,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-12-22 10:21:37,474 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:21:37,474 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] [2020-12-22 10:21:37,474 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 10:21:37,474 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:21:37,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:21:37,475 INFO L82 PathProgramCache]: Analyzing trace with hash 2018214719, now seen corresponding path program 1 times [2020-12-22 10:21:37,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:21:37,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627848073] [2020-12-22 10:21:37,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:21:37,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:21:37,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:21:37,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627848073] [2020-12-22 10:21:37,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:21:37,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:21:37,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31303864] [2020-12-22 10:21:37,609 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:21:37,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:21:37,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:21:37,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:21:37,610 INFO L87 Difference]: Start difference. First operand 39336 states and 58692 transitions. Second operand 8 states. [2020-12-22 10:21:42,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:21:42,354 INFO L93 Difference]: Finished difference Result 71503 states and 105269 transitions. [2020-12-22 10:21:42,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:21:42,354 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 109 [2020-12-22 10:21:42,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:21:42,489 INFO L225 Difference]: With dead ends: 71503 [2020-12-22 10:21:42,489 INFO L226 Difference]: Without dead ends: 71501 [2020-12-22 10:21:42,506 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:21:42,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71501 states. [2020-12-22 10:21:45,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71501 to 40872. [2020-12-22 10:21:45,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40872 states. [2020-12-22 10:21:45,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40872 states to 40872 states and 60100 transitions. [2020-12-22 10:21:45,237 INFO L78 Accepts]: Start accepts. Automaton has 40872 states and 60100 transitions. Word has length 109 [2020-12-22 10:21:45,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:21:45,237 INFO L481 AbstractCegarLoop]: Abstraction has 40872 states and 60100 transitions. [2020-12-22 10:21:45,237 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:21:45,238 INFO L276 IsEmpty]: Start isEmpty. Operand 40872 states and 60100 transitions. [2020-12-22 10:21:45,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-12-22 10:21:45,239 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:21:45,240 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:21:45,240 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 10:21:45,241 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:21:45,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:21:45,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1519320962, now seen corresponding path program 1 times [2020-12-22 10:21:45,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:21:45,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089970534] [2020-12-22 10:21:45,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:21:45,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:21:45,354 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:21:45,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089970534] [2020-12-22 10:21:45,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:21:45,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:21:45,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366297977] [2020-12-22 10:21:45,355 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:21:45,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:21:45,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:21:45,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:21:45,356 INFO L87 Difference]: Start difference. First operand 40872 states and 60100 transitions. Second operand 3 states. [2020-12-22 10:21:53,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:21:53,601 INFO L93 Difference]: Finished difference Result 43880 states and 65724 transitions. [2020-12-22 10:21:53,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:21:53,601 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 121 [2020-12-22 10:21:53,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:21:53,672 INFO L225 Difference]: With dead ends: 43880 [2020-12-22 10:21:53,672 INFO L226 Difference]: Without dead ends: 42376 [2020-12-22 10:21:53,683 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:21:53,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42376 states. [2020-12-22 10:21:56,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42376 to 42374. [2020-12-22 10:21:56,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42374 states. [2020-12-22 10:21:56,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42374 states to 42374 states and 62041 transitions. [2020-12-22 10:21:56,173 INFO L78 Accepts]: Start accepts. Automaton has 42374 states and 62041 transitions. Word has length 121 [2020-12-22 10:21:56,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:21:56,179 INFO L481 AbstractCegarLoop]: Abstraction has 42374 states and 62041 transitions. [2020-12-22 10:21:56,179 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:21:56,179 INFO L276 IsEmpty]: Start isEmpty. Operand 42374 states and 62041 transitions. [2020-12-22 10:21:56,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-12-22 10:21:56,187 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:21:56,187 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:21:56,188 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 10:21:56,188 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:21:56,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:21:56,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1871237977, now seen corresponding path program 1 times [2020-12-22 10:21:56,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:21:56,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067515414] [2020-12-22 10:21:56,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:21:56,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:21:56,296 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:21:56,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067515414] [2020-12-22 10:21:56,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:21:56,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:21:56,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275023235] [2020-12-22 10:21:56,299 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:21:56,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:21:56,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:21:56,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:21:56,300 INFO L87 Difference]: Start difference. First operand 42374 states and 62041 transitions. Second operand 3 states. [2020-12-22 10:22:04,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:22:04,425 INFO L93 Difference]: Finished difference Result 48384 states and 71546 transitions. [2020-12-22 10:22:04,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:22:04,426 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 123 [2020-12-22 10:22:04,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:22:04,487 INFO L225 Difference]: With dead ends: 48384 [2020-12-22 10:22:04,487 INFO L226 Difference]: Without dead ends: 45378 [2020-12-22 10:22:04,500 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:22:04,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45378 states. [2020-12-22 10:22:06,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45378 to 45378. [2020-12-22 10:22:06,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45378 states. [2020-12-22 10:22:06,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45378 states to 45378 states and 65713 transitions. [2020-12-22 10:22:06,975 INFO L78 Accepts]: Start accepts. Automaton has 45378 states and 65713 transitions. Word has length 123 [2020-12-22 10:22:06,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:22:06,976 INFO L481 AbstractCegarLoop]: Abstraction has 45378 states and 65713 transitions. [2020-12-22 10:22:06,976 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:22:06,976 INFO L276 IsEmpty]: Start isEmpty. Operand 45378 states and 65713 transitions. [2020-12-22 10:22:06,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-12-22 10:22:06,978 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:22:06,978 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:22:06,978 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 10:22:06,978 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:22:06,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:22:06,979 INFO L82 PathProgramCache]: Analyzing trace with hash -977766964, now seen corresponding path program 1 times [2020-12-22 10:22:06,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:22:06,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306286931] [2020-12-22 10:22:06,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:22:07,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:22:07,114 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:22:07,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306286931] [2020-12-22 10:22:07,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:22:07,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:22:07,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112661327] [2020-12-22 10:22:07,115 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 10:22:07,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:22:07,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 10:22:07,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 10:22:07,116 INFO L87 Difference]: Start difference. First operand 45378 states and 65713 transitions. Second operand 4 states. [2020-12-22 10:22:18,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:22:18,836 INFO L93 Difference]: Finished difference Result 58147 states and 83397 transitions. [2020-12-22 10:22:18,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 10:22:18,837 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 125 [2020-12-22 10:22:18,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:22:18,898 INFO L225 Difference]: With dead ends: 58147 [2020-12-22 10:22:18,899 INFO L226 Difference]: Without dead ends: 52137 [2020-12-22 10:22:18,913 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:22:18,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52137 states. [2020-12-22 10:22:21,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52137 to 51386. [2020-12-22 10:22:21,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51386 states. [2020-12-22 10:22:21,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51386 states to 51386 states and 73365 transitions. [2020-12-22 10:22:21,654 INFO L78 Accepts]: Start accepts. Automaton has 51386 states and 73365 transitions. Word has length 125 [2020-12-22 10:22:21,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:22:21,654 INFO L481 AbstractCegarLoop]: Abstraction has 51386 states and 73365 transitions. [2020-12-22 10:22:21,654 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 10:22:21,655 INFO L276 IsEmpty]: Start isEmpty. Operand 51386 states and 73365 transitions. [2020-12-22 10:22:21,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 10:22:21,679 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:22:21,680 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:22:21,680 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 10:22:21,680 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:22:21,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:22:21,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1243757929, now seen corresponding path program 1 times [2020-12-22 10:22:21,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:22:21,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476221143] [2020-12-22 10:22:21,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:22:21,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:22:21,927 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-12-22 10:22:21,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476221143] [2020-12-22 10:22:21,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:22:21,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:22:21,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857914375] [2020-12-22 10:22:21,930 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:22:21,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:22:21,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:22:21,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:22:21,931 INFO L87 Difference]: Start difference. First operand 51386 states and 73365 transitions. Second operand 10 states. [2020-12-22 10:22:40,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:22:40,745 INFO L93 Difference]: Finished difference Result 373324 states and 541662 transitions. [2020-12-22 10:22:40,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:22:40,746 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 149 [2020-12-22 10:22:40,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:22:41,309 INFO L225 Difference]: With dead ends: 373324 [2020-12-22 10:22:41,309 INFO L226 Difference]: Without dead ends: 334026 [2020-12-22 10:22:41,440 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:22:41,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334026 states. [2020-12-22 10:22:49,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334026 to 90682. [2020-12-22 10:22:49,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90682 states. [2020-12-22 10:22:49,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90682 states to 90682 states and 130197 transitions. [2020-12-22 10:22:49,573 INFO L78 Accepts]: Start accepts. Automaton has 90682 states and 130197 transitions. Word has length 149 [2020-12-22 10:22:49,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:22:49,573 INFO L481 AbstractCegarLoop]: Abstraction has 90682 states and 130197 transitions. [2020-12-22 10:22:49,573 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:22:49,574 INFO L276 IsEmpty]: Start isEmpty. Operand 90682 states and 130197 transitions. [2020-12-22 10:22:49,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 10:22:49,605 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:22:49,606 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:22:49,606 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 10:22:49,606 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:22:49,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:22:49,607 INFO L82 PathProgramCache]: Analyzing trace with hash 1273280147, now seen corresponding path program 1 times [2020-12-22 10:22:49,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:22:49,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584457558] [2020-12-22 10:22:49,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:22:49,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:22:49,894 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-12-22 10:22:49,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584457558] [2020-12-22 10:22:49,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:22:49,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:22:49,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303096552] [2020-12-22 10:22:49,896 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:22:49,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:22:49,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:22:49,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:22:49,898 INFO L87 Difference]: Start difference. First operand 90682 states and 130197 transitions. Second operand 10 states. [2020-12-22 10:23:14,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:23:14,447 INFO L93 Difference]: Finished difference Result 412620 states and 598494 transitions. [2020-12-22 10:23:14,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:23:14,448 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 149 [2020-12-22 10:23:14,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:23:15,249 INFO L225 Difference]: With dead ends: 412620 [2020-12-22 10:23:15,249 INFO L226 Difference]: Without dead ends: 373322 [2020-12-22 10:23:15,375 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:23:15,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373322 states. [2020-12-22 10:23:28,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373322 to 149690. [2020-12-22 10:23:28,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149690 states. [2020-12-22 10:23:28,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149690 states to 149690 states and 215125 transitions. [2020-12-22 10:23:28,330 INFO L78 Accepts]: Start accepts. Automaton has 149690 states and 215125 transitions. Word has length 149 [2020-12-22 10:23:28,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:23:28,331 INFO L481 AbstractCegarLoop]: Abstraction has 149690 states and 215125 transitions. [2020-12-22 10:23:28,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:23:28,331 INFO L276 IsEmpty]: Start isEmpty. Operand 149690 states and 215125 transitions. [2020-12-22 10:23:28,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 10:23:28,365 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:23:28,365 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:23:28,365 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 10:23:28,366 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:23:28,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:23:28,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1546967859, now seen corresponding path program 1 times [2020-12-22 10:23:28,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:23:28,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299237093] [2020-12-22 10:23:28,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:23:28,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:23:28,617 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 10:23:28,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299237093] [2020-12-22 10:23:28,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:23:28,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:23:28,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994445241] [2020-12-22 10:23:28,618 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:23:28,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:23:28,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:23:28,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:23:28,619 INFO L87 Difference]: Start difference. First operand 149690 states and 215125 transitions. Second operand 10 states. [2020-12-22 10:23:59,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:23:59,258 INFO L93 Difference]: Finished difference Result 451916 states and 655326 transitions. [2020-12-22 10:23:59,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:23:59,259 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 149 [2020-12-22 10:23:59,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:24:00,137 INFO L225 Difference]: With dead ends: 451916 [2020-12-22 10:24:00,138 INFO L226 Difference]: Without dead ends: 412618 [2020-12-22 10:24:00,286 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:24:00,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412618 states.