/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_label02.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 10:21:43,364 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 10:21:43,367 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 10:21:43,402 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 10:21:43,403 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 10:21:43,404 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 10:21:43,406 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 10:21:43,421 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 10:21:43,425 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 10:21:43,426 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 10:21:43,427 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 10:21:43,429 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 10:21:43,429 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 10:21:43,431 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 10:21:43,432 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 10:21:43,433 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 10:21:43,434 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 10:21:43,435 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 10:21:43,437 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 10:21:43,440 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 10:21:43,442 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 10:21:43,443 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 10:21:43,445 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 10:21:43,445 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 10:21:43,449 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 10:21:43,459 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 10:21:43,460 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 10:21:43,461 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 10:21:43,462 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 10:21:43,510 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 10:21:43,511 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 10:21:43,514 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 10:21:43,515 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 10:21:43,515 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 10:21:43,515 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 10:21:43,516 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 10:21:43,517 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 10:21:43,517 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 10:21:43,517 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 10:21:43,517 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 10:21:43,518 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 10:21:43,518 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 10:21:43,518 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 10:21:43,519 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 10:21:43,519 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 10:21:43,520 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 10:21:43,520 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 10:21:43,521 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 10:21:43,521 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 10:21:43,521 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 10:21:43,522 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 10:21:43,522 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 10:21:43,522 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 10:21:43,522 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 10:21:43,523 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 10:21:43,925 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 10:21:43,966 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 10:21:43,970 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 10:21:43,972 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 10:21:43,972 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 10:21:43,973 INFO L432 ainManager$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_label02.c [2020-12-22 10:21:44,065 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c783a44c/44859450ee7e457bb2184d86836584c9/FLAG6a9d9b5c9 [2020-12-22 10:21:45,143 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 10:21:45,144 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.8.ufo.BOUNDED-16.pals+Problem12_label02.c [2020-12-22 10:21:45,181 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c783a44c/44859450ee7e457bb2184d86836584c9/FLAG6a9d9b5c9 [2020-12-22 10:21:45,582 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c783a44c/44859450ee7e457bb2184d86836584c9 [2020-12-22 10:21:45,585 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 10:21:45,588 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 10:21:45,590 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 10:21:45,591 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 10:21:45,595 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 10:21:45,596 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:21:45" (1/1) ... [2020-12-22 10:21:45,598 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f147e7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:21:45, skipping insertion in model container [2020-12-22 10:21:45,598 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:21:45" (1/1) ... [2020-12-22 10:21:45,608 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 10:21:45,842 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 10:21:46,249 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_label02.c[26847,26860] [2020-12-22 10:21:46,306 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_label02.c[33894,33907] [2020-12-22 10:21:47,292 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:21:47,310 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 10:21:47,413 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_label02.c[26847,26860] [2020-12-22 10:21:47,439 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_label02.c[33894,33907] [2020-12-22 10:21:48,111 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:21:48,162 INFO L208 MainTranslator]: Completed translation [2020-12-22 10:21:48,163 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:21:48 WrapperNode [2020-12-22 10:21:48,163 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 10:21:48,165 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 10:21:48,172 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 10:21:48,172 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 10:21:48,181 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:21:48" (1/1) ... [2020-12-22 10:21:48,268 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:21:48" (1/1) ... [2020-12-22 10:21:48,745 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 10:21:48,746 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 10:21:48,747 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 10:21:48,747 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 10:21:48,757 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:21:48" (1/1) ... [2020-12-22 10:21:48,758 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:21:48" (1/1) ... [2020-12-22 10:21:48,956 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:21:48" (1/1) ... [2020-12-22 10:21:48,962 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:21:48" (1/1) ... [2020-12-22 10:21:49,146 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:21:48" (1/1) ... [2020-12-22 10:21:49,194 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:21:48" (1/1) ... [2020-12-22 10:21:49,246 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:21:48" (1/1) ... [2020-12-22 10:21:49,424 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 10:21:49,426 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 10:21:49,426 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 10:21:49,426 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 10:21:49,427 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:21:48" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 10:21:49,521 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 10:21:49,522 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 10:21:49,522 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 10:21:49,522 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 10:21:56,702 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 10:21:56,703 INFO L299 CfgBuilder]: Removed 42 assume(true) statements. [2020-12-22 10:21:56,707 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:21:56 BoogieIcfgContainer [2020-12-22 10:21:56,708 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 10:21:56,711 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 10:21:56,714 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 10:21:56,718 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 10:21:56,718 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 10:21:45" (1/3) ... [2020-12-22 10:21:56,719 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35826328 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:21:56, skipping insertion in model container [2020-12-22 10:21:56,720 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:21:48" (2/3) ... [2020-12-22 10:21:56,720 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35826328 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:21:56, skipping insertion in model container [2020-12-22 10:21:56,720 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:21:56" (3/3) ... [2020-12-22 10:21:56,722 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.8.ufo.BOUNDED-16.pals+Problem12_label02.c [2020-12-22 10:21:56,730 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 10:21:56,737 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 10:21:56,763 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 10:21:56,816 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 10:21:56,817 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 10:21:56,817 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 10:21:56,817 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 10:21:56,817 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 10:21:56,817 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 10:21:56,817 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 10:21:56,818 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 10:21:56,858 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states. [2020-12-22 10:21:56,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-22 10:21:56,875 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:21:56,876 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 10:21:56,877 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:21:56,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:21:56,883 INFO L82 PathProgramCache]: Analyzing trace with hash -2107180874, now seen corresponding path program 1 times [2020-12-22 10:21:56,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:21:56,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644853009] [2020-12-22 10:21:56,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:21:57,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:21:57,239 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 10:21:57,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644853009] [2020-12-22 10:21:57,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:21:57,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:21:57,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768139089] [2020-12-22 10:21:57,248 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 10:21:57,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:21:57,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 10:21:57,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 10:21:57,269 INFO L87 Difference]: Start difference. First operand 963 states. Second operand 2 states. [2020-12-22 10:21:57,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:21:57,367 INFO L93 Difference]: Finished difference Result 1859 states and 3512 transitions. [2020-12-22 10:21:57,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 10:21:57,369 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 46 [2020-12-22 10:21:57,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:21:57,403 INFO L225 Difference]: With dead ends: 1859 [2020-12-22 10:21:57,404 INFO L226 Difference]: Without dead ends: 897 [2020-12-22 10:21:57,414 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 10:21:57,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2020-12-22 10:21:57,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 897. [2020-12-22 10:21:57,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 897 states. [2020-12-22 10:21:57,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 1688 transitions. [2020-12-22 10:21:57,533 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 1688 transitions. Word has length 46 [2020-12-22 10:21:57,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:21:57,534 INFO L481 AbstractCegarLoop]: Abstraction has 897 states and 1688 transitions. [2020-12-22 10:21:57,534 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 10:21:57,534 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 1688 transitions. [2020-12-22 10:21:57,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-22 10:21:57,537 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:21:57,537 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 10:21:57,538 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 10:21:57,538 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:21:57,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:21:57,539 INFO L82 PathProgramCache]: Analyzing trace with hash 815979124, now seen corresponding path program 1 times [2020-12-22 10:21:57,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:21:57,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094197455] [2020-12-22 10:21:57,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:21:57,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:21:57,691 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 10:21:57,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094197455] [2020-12-22 10:21:57,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:21:57,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:21:57,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713314452] [2020-12-22 10:21:57,696 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 10:21:57,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:21:57,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 10:21:57,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:21:57,698 INFO L87 Difference]: Start difference. First operand 897 states and 1688 transitions. Second operand 5 states. [2020-12-22 10:21:57,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:21:57,985 INFO L93 Difference]: Finished difference Result 977 states and 1813 transitions. [2020-12-22 10:21:57,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 10:21:57,986 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 46 [2020-12-22 10:21:57,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:21:57,992 INFO L225 Difference]: With dead ends: 977 [2020-12-22 10:21:57,992 INFO L226 Difference]: Without dead ends: 897 [2020-12-22 10:21:57,994 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 10:21:57,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2020-12-22 10:21:58,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 897. [2020-12-22 10:21:58,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 897 states. [2020-12-22 10:21:58,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 1627 transitions. [2020-12-22 10:21:58,038 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 1627 transitions. Word has length 46 [2020-12-22 10:21:58,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:21:58,038 INFO L481 AbstractCegarLoop]: Abstraction has 897 states and 1627 transitions. [2020-12-22 10:21:58,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 10:21:58,039 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 1627 transitions. [2020-12-22 10:21:58,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 10:21:58,045 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:21:58,046 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] [2020-12-22 10:21:58,047 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 10:21:58,047 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:21:58,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:21:58,049 INFO L82 PathProgramCache]: Analyzing trace with hash -967931068, now seen corresponding path program 1 times [2020-12-22 10:21:58,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:21:58,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421102657] [2020-12-22 10:21:58,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:21:58,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:21:58,424 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 10:21:58,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421102657] [2020-12-22 10:21:58,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:21:58,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:21:58,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112709877] [2020-12-22 10:21:58,426 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 10:21:58,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:21:58,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 10:21:58,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 10:21:58,428 INFO L87 Difference]: Start difference. First operand 897 states and 1627 transitions. Second operand 4 states. [2020-12-22 10:22:09,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:22:09,561 INFO L93 Difference]: Finished difference Result 3152 states and 5936 transitions. [2020-12-22 10:22:09,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 10:22:09,562 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 63 [2020-12-22 10:22:09,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:22:09,575 INFO L225 Difference]: With dead ends: 3152 [2020-12-22 10:22:09,576 INFO L226 Difference]: Without dead ends: 2399 [2020-12-22 10:22:09,578 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 10:22:09,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2399 states. [2020-12-22 10:22:09,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2399 to 2399. [2020-12-22 10:22:09,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2399 states. [2020-12-22 10:22:09,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2399 states to 2399 states and 3741 transitions. [2020-12-22 10:22:09,643 INFO L78 Accepts]: Start accepts. Automaton has 2399 states and 3741 transitions. Word has length 63 [2020-12-22 10:22:09,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:22:09,644 INFO L481 AbstractCegarLoop]: Abstraction has 2399 states and 3741 transitions. [2020-12-22 10:22:09,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 10:22:09,644 INFO L276 IsEmpty]: Start isEmpty. Operand 2399 states and 3741 transitions. [2020-12-22 10:22:09,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:22:09,646 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:22:09,647 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 10:22:09,647 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 10:22:09,647 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:22:09,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:22:09,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1090783836, now seen corresponding path program 1 times [2020-12-22 10:22:09,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:22:09,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124661039] [2020-12-22 10:22:09,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:22:09,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:22:09,857 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 10:22:09,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124661039] [2020-12-22 10:22:09,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:22:09,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:22:09,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518394302] [2020-12-22 10:22:09,861 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:22:09,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:22:09,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:22:09,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:22:09,863 INFO L87 Difference]: Start difference. First operand 2399 states and 3741 transitions. Second operand 3 states. [2020-12-22 10:22:09,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:22:09,909 INFO L93 Difference]: Finished difference Result 2545 states and 3973 transitions. [2020-12-22 10:22:09,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:22:09,910 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:22:09,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:22:09,922 INFO L225 Difference]: With dead ends: 2545 [2020-12-22 10:22:09,922 INFO L226 Difference]: Without dead ends: 2469 [2020-12-22 10:22:09,923 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 10:22:09,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2469 states. [2020-12-22 10:22:09,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2469 to 2467. [2020-12-22 10:22:09,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2467 states. [2020-12-22 10:22:09,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2467 states to 2467 states and 3850 transitions. [2020-12-22 10:22:09,994 INFO L78 Accepts]: Start accepts. Automaton has 2467 states and 3850 transitions. Word has length 106 [2020-12-22 10:22:09,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:22:09,996 INFO L481 AbstractCegarLoop]: Abstraction has 2467 states and 3850 transitions. [2020-12-22 10:22:09,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:22:09,996 INFO L276 IsEmpty]: Start isEmpty. Operand 2467 states and 3850 transitions. [2020-12-22 10:22:09,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:22:09,997 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:22:09,998 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 10:22:09,998 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 10:22:09,998 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:22:09,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:22:09,999 INFO L82 PathProgramCache]: Analyzing trace with hash 326222874, now seen corresponding path program 1 times [2020-12-22 10:22:09,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:22:09,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789879460] [2020-12-22 10:22:09,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:22:10,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:22:10,143 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 10:22:10,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789879460] [2020-12-22 10:22:10,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:22:10,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:22:10,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245888148] [2020-12-22 10:22:10,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:22:10,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:22:10,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:22:10,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:22:10,147 INFO L87 Difference]: Start difference. First operand 2467 states and 3850 transitions. Second operand 3 states. [2020-12-22 10:22:10,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:22:10,204 INFO L93 Difference]: Finished difference Result 2743 states and 4290 transitions. [2020-12-22 10:22:10,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:22:10,204 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:22:10,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:22:10,221 INFO L225 Difference]: With dead ends: 2743 [2020-12-22 10:22:10,222 INFO L226 Difference]: Without dead ends: 2599 [2020-12-22 10:22:10,223 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 10:22:10,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2599 states. [2020-12-22 10:22:10,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2599 to 2597. [2020-12-22 10:22:10,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2597 states. [2020-12-22 10:22:10,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2597 states to 2597 states and 4057 transitions. [2020-12-22 10:22:10,301 INFO L78 Accepts]: Start accepts. Automaton has 2597 states and 4057 transitions. Word has length 106 [2020-12-22 10:22:10,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:22:10,302 INFO L481 AbstractCegarLoop]: Abstraction has 2597 states and 4057 transitions. [2020-12-22 10:22:10,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:22:10,303 INFO L276 IsEmpty]: Start isEmpty. Operand 2597 states and 4057 transitions. [2020-12-22 10:22:10,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:22:10,311 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:22:10,312 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 10:22:10,312 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 10:22:10,312 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:22:10,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:22:10,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1573731728, now seen corresponding path program 1 times [2020-12-22 10:22:10,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:22:10,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138993646] [2020-12-22 10:22:10,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:22:10,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:22:10,445 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 10:22:10,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138993646] [2020-12-22 10:22:10,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:22:10,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:22:10,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310790517] [2020-12-22 10:22:10,447 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:22:10,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:22:10,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:22:10,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:22:10,448 INFO L87 Difference]: Start difference. First operand 2597 states and 4057 transitions. Second operand 3 states. [2020-12-22 10:22:10,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:22:10,519 INFO L93 Difference]: Finished difference Result 3121 states and 4891 transitions. [2020-12-22 10:22:10,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:22:10,520 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:22:10,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:22:10,540 INFO L225 Difference]: With dead ends: 3121 [2020-12-22 10:22:10,540 INFO L226 Difference]: Without dead ends: 2847 [2020-12-22 10:22:10,545 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 10:22:10,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2847 states. [2020-12-22 10:22:10,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2847 to 2845. [2020-12-22 10:22:10,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2845 states. [2020-12-22 10:22:10,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2845 states to 2845 states and 4449 transitions. [2020-12-22 10:22:10,628 INFO L78 Accepts]: Start accepts. Automaton has 2845 states and 4449 transitions. Word has length 106 [2020-12-22 10:22:10,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:22:10,630 INFO L481 AbstractCegarLoop]: Abstraction has 2845 states and 4449 transitions. [2020-12-22 10:22:10,630 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:22:10,630 INFO L276 IsEmpty]: Start isEmpty. Operand 2845 states and 4449 transitions. [2020-12-22 10:22:10,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:22:10,632 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:22:10,632 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] [2020-12-22 10:22:10,632 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 10:22:10,632 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:22:10,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:22:10,639 INFO L82 PathProgramCache]: Analyzing trace with hash 832299526, now seen corresponding path program 1 times [2020-12-22 10:22:10,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:22:10,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569329138] [2020-12-22 10:22:10,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:22:10,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:22:10,759 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 10:22:10,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569329138] [2020-12-22 10:22:10,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:22:10,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:22:10,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678965494] [2020-12-22 10:22:10,761 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:22:10,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:22:10,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:22:10,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:22:10,762 INFO L87 Difference]: Start difference. First operand 2845 states and 4449 transitions. Second operand 3 states. [2020-12-22 10:22:10,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:22:10,836 INFO L93 Difference]: Finished difference Result 3841 states and 6027 transitions. [2020-12-22 10:22:10,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:22:10,837 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:22:10,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:22:10,857 INFO L225 Difference]: With dead ends: 3841 [2020-12-22 10:22:10,858 INFO L226 Difference]: Without dead ends: 3319 [2020-12-22 10:22:10,861 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 10:22:10,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3319 states. [2020-12-22 10:22:10,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3319 to 3317. [2020-12-22 10:22:10,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3317 states. [2020-12-22 10:22:10,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3317 states to 3317 states and 5189 transitions. [2020-12-22 10:22:10,974 INFO L78 Accepts]: Start accepts. Automaton has 3317 states and 5189 transitions. Word has length 106 [2020-12-22 10:22:10,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:22:10,975 INFO L481 AbstractCegarLoop]: Abstraction has 3317 states and 5189 transitions. [2020-12-22 10:22:10,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:22:10,975 INFO L276 IsEmpty]: Start isEmpty. Operand 3317 states and 5189 transitions. [2020-12-22 10:22:10,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:22:10,977 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:22:10,977 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 10:22:10,977 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 10:22:10,977 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:22:10,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:22:10,978 INFO L82 PathProgramCache]: Analyzing trace with hash 2050284924, now seen corresponding path program 1 times [2020-12-22 10:22:10,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:22:10,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309769133] [2020-12-22 10:22:10,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:22:11,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:22:11,197 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 10:22:11,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309769133] [2020-12-22 10:22:11,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:22:11,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:22:11,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976880949] [2020-12-22 10:22:11,199 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:22:11,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:22:11,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:22:11,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:22:11,201 INFO L87 Difference]: Start difference. First operand 3317 states and 5189 transitions. Second operand 10 states. [2020-12-22 10:22:12,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:22:12,343 INFO L93 Difference]: Finished difference Result 19221 states and 30293 transitions. [2020-12-22 10:22:12,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 10:22:12,343 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 106 [2020-12-22 10:22:12,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:22:12,417 INFO L225 Difference]: With dead ends: 19221 [2020-12-22 10:22:12,417 INFO L226 Difference]: Without dead ends: 18227 [2020-12-22 10:22:12,427 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2020-12-22 10:22:12,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18227 states. [2020-12-22 10:22:12,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18227 to 4309. [2020-12-22 10:22:12,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4309 states. [2020-12-22 10:22:12,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4309 states to 4309 states and 6725 transitions. [2020-12-22 10:22:12,789 INFO L78 Accepts]: Start accepts. Automaton has 4309 states and 6725 transitions. Word has length 106 [2020-12-22 10:22:12,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:22:12,790 INFO L481 AbstractCegarLoop]: Abstraction has 4309 states and 6725 transitions. [2020-12-22 10:22:12,790 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:22:12,790 INFO L276 IsEmpty]: Start isEmpty. Operand 4309 states and 6725 transitions. [2020-12-22 10:22:12,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:22:12,791 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:22:12,792 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 10:22:12,792 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 10:22:12,792 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:22:12,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:22:12,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1813103660, now seen corresponding path program 1 times [2020-12-22 10:22:12,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:22:12,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031369547] [2020-12-22 10:22:12,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:22:12,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:22:12,872 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 10:22:12,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031369547] [2020-12-22 10:22:12,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:22:12,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:22:12,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576454901] [2020-12-22 10:22:12,874 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:22:12,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:22:12,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:22:12,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:22:12,875 INFO L87 Difference]: Start difference. First operand 4309 states and 6725 transitions. Second operand 3 states. [2020-12-22 10:22:13,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:22:13,062 INFO L93 Difference]: Finished difference Result 7251 states and 11321 transitions. [2020-12-22 10:22:13,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:22:13,063 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2020-12-22 10:22:13,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:22:13,075 INFO L225 Difference]: With dead ends: 7251 [2020-12-22 10:22:13,075 INFO L226 Difference]: Without dead ends: 5265 [2020-12-22 10:22:13,079 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 10:22:13,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5265 states. [2020-12-22 10:22:13,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5265 to 5263. [2020-12-22 10:22:13,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5263 states. [2020-12-22 10:22:13,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5263 states to 5263 states and 8191 transitions. [2020-12-22 10:22:13,324 INFO L78 Accepts]: Start accepts. Automaton has 5263 states and 8191 transitions. Word has length 108 [2020-12-22 10:22:13,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:22:13,324 INFO L481 AbstractCegarLoop]: Abstraction has 5263 states and 8191 transitions. [2020-12-22 10:22:13,324 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:22:13,324 INFO L276 IsEmpty]: Start isEmpty. Operand 5263 states and 8191 transitions. [2020-12-22 10:22:13,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:22:13,326 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:22:13,326 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 10:22:13,326 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 10:22:13,326 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:22:13,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:22:13,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1879597172, now seen corresponding path program 1 times [2020-12-22 10:22:13,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:22:13,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872189838] [2020-12-22 10:22:13,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:22:13,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:22:13,755 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 10:22:13,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872189838] [2020-12-22 10:22:13,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:22:13,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:22:13,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828523435] [2020-12-22 10:22:13,757 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:22:13,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:22:13,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:22:13,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:22:13,758 INFO L87 Difference]: Start difference. First operand 5263 states and 8191 transitions. Second operand 10 states. [2020-12-22 10:22:14,316 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-12-22 10:22:14,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:22:14,717 INFO L93 Difference]: Finished difference Result 8203 states and 12761 transitions. [2020-12-22 10:22:14,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:22:14,718 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 108 [2020-12-22 10:22:14,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:22:14,730 INFO L225 Difference]: With dead ends: 8203 [2020-12-22 10:22:14,730 INFO L226 Difference]: Without dead ends: 5265 [2020-12-22 10:22:14,736 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:22:14,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5265 states. [2020-12-22 10:22:15,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5265 to 5263. [2020-12-22 10:22:15,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5263 states. [2020-12-22 10:22:15,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5263 states to 5263 states and 8167 transitions. [2020-12-22 10:22:15,021 INFO L78 Accepts]: Start accepts. Automaton has 5263 states and 8167 transitions. Word has length 108 [2020-12-22 10:22:15,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:22:15,021 INFO L481 AbstractCegarLoop]: Abstraction has 5263 states and 8167 transitions. [2020-12-22 10:22:15,021 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:22:15,021 INFO L276 IsEmpty]: Start isEmpty. Operand 5263 states and 8167 transitions. [2020-12-22 10:22:15,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:22:15,023 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:22:15,023 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 10:22:15,023 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 10:22:15,023 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:22:15,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:22:15,024 INFO L82 PathProgramCache]: Analyzing trace with hash 621051568, now seen corresponding path program 1 times [2020-12-22 10:22:15,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:22:15,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745756187] [2020-12-22 10:22:15,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:22:15,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:22:15,114 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 10:22:15,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745756187] [2020-12-22 10:22:15,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:22:15,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:22:15,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313195329] [2020-12-22 10:22:15,115 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:22:15,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:22:15,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:22:15,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:22:15,118 INFO L87 Difference]: Start difference. First operand 5263 states and 8167 transitions. Second operand 3 states. [2020-12-22 10:22:15,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:22:15,617 INFO L93 Difference]: Finished difference Result 10851 states and 16777 transitions. [2020-12-22 10:22:15,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:22:15,618 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2020-12-22 10:22:15,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:22:15,648 INFO L225 Difference]: With dead ends: 10851 [2020-12-22 10:22:15,648 INFO L226 Difference]: Without dead ends: 7913 [2020-12-22 10:22:15,658 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 10:22:15,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7913 states. [2020-12-22 10:22:16,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7913 to 7911. [2020-12-22 10:22:16,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7911 states. [2020-12-22 10:22:16,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7911 states to 7911 states and 12183 transitions. [2020-12-22 10:22:16,210 INFO L78 Accepts]: Start accepts. Automaton has 7911 states and 12183 transitions. Word has length 108 [2020-12-22 10:22:16,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:22:16,210 INFO L481 AbstractCegarLoop]: Abstraction has 7911 states and 12183 transitions. [2020-12-22 10:22:16,211 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:22:16,211 INFO L276 IsEmpty]: Start isEmpty. Operand 7911 states and 12183 transitions. [2020-12-22 10:22:16,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:22:16,212 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:22:16,213 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 10:22:16,213 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 10:22:16,215 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:22:16,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:22:16,215 INFO L82 PathProgramCache]: Analyzing trace with hash 894739280, now seen corresponding path program 1 times [2020-12-22 10:22:16,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:22:16,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157182831] [2020-12-22 10:22:16,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:22:16,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:22:16,315 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 10:22:16,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157182831] [2020-12-22 10:22:16,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:22:16,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:22:16,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862875475] [2020-12-22 10:22:16,316 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:22:16,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:22:16,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:22:16,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:22:16,317 INFO L87 Difference]: Start difference. First operand 7911 states and 12183 transitions. Second operand 3 states. [2020-12-22 10:22:17,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:22:17,091 INFO L93 Difference]: Finished difference Result 18507 states and 28345 transitions. [2020-12-22 10:22:17,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:22:17,092 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2020-12-22 10:22:17,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:22:17,121 INFO L225 Difference]: With dead ends: 18507 [2020-12-22 10:22:17,121 INFO L226 Difference]: Without dead ends: 12921 [2020-12-22 10:22:17,131 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 10:22:17,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12921 states. [2020-12-22 10:22:17,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12921 to 12919. [2020-12-22 10:22:17,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12919 states. [2020-12-22 10:22:17,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12919 states to 12919 states and 19687 transitions. [2020-12-22 10:22:17,851 INFO L78 Accepts]: Start accepts. Automaton has 12919 states and 19687 transitions. Word has length 108 [2020-12-22 10:22:17,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:22:17,851 INFO L481 AbstractCegarLoop]: Abstraction has 12919 states and 19687 transitions. [2020-12-22 10:22:17,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:22:17,852 INFO L276 IsEmpty]: Start isEmpty. Operand 12919 states and 19687 transitions. [2020-12-22 10:22:17,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:22:17,853 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:22:17,853 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 10:22:17,854 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 10:22:17,854 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:22:17,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:22:17,854 INFO L82 PathProgramCache]: Analyzing trace with hash -1581156368, now seen corresponding path program 1 times [2020-12-22 10:22:17,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:22:17,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326780966] [2020-12-22 10:22:17,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:22:17,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:22:17,942 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 10:22:17,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326780966] [2020-12-22 10:22:17,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:22:17,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:22:17,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602282987] [2020-12-22 10:22:17,943 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:22:17,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:22:17,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:22:17,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:22:17,945 INFO L87 Difference]: Start difference. First operand 12919 states and 19687 transitions. Second operand 3 states. [2020-12-22 10:22:19,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:22:19,132 INFO L93 Difference]: Finished difference Result 32955 states and 49897 transitions. [2020-12-22 10:22:19,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:22:19,133 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2020-12-22 10:22:19,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:22:19,182 INFO L225 Difference]: With dead ends: 32955 [2020-12-22 10:22:19,182 INFO L226 Difference]: Without dead ends: 22361 [2020-12-22 10:22:19,201 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 10:22:19,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22361 states. [2020-12-22 10:22:20,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22361 to 22359. [2020-12-22 10:22:20,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22359 states. [2020-12-22 10:22:20,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22359 states to 22359 states and 33639 transitions. [2020-12-22 10:22:20,582 INFO L78 Accepts]: Start accepts. Automaton has 22359 states and 33639 transitions. Word has length 108 [2020-12-22 10:22:20,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:22:20,583 INFO L481 AbstractCegarLoop]: Abstraction has 22359 states and 33639 transitions. [2020-12-22 10:22:20,583 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:22:20,583 INFO L276 IsEmpty]: Start isEmpty. Operand 22359 states and 33639 transitions. [2020-12-22 10:22:20,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:22:20,584 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:22:20,585 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 10:22:20,585 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 10:22:20,585 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:22:20,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:22:20,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1401750384, now seen corresponding path program 1 times [2020-12-22 10:22:20,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:22:20,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907790628] [2020-12-22 10:22:20,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:22:20,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:22:20,668 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 10:22:20,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907790628] [2020-12-22 10:22:20,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:22:20,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:22:20,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054278432] [2020-12-22 10:22:20,669 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:22:20,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:22:20,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:22:20,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:22:20,670 INFO L87 Difference]: Start difference. First operand 22359 states and 33639 transitions. Second operand 3 states. [2020-12-22 10:22:22,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:22:22,807 INFO L93 Difference]: Finished difference Result 60123 states and 89833 transitions. [2020-12-22 10:22:22,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:22:22,808 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2020-12-22 10:22:22,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:22:22,897 INFO L225 Difference]: With dead ends: 60123 [2020-12-22 10:22:22,898 INFO L226 Difference]: Without dead ends: 40089 [2020-12-22 10:22:22,927 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:22:22,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40089 states. [2020-12-22 10:22:25,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40089 to 40087. [2020-12-22 10:22:25,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40087 states. [2020-12-22 10:22:25,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40087 states to 40087 states and 59431 transitions. [2020-12-22 10:22:25,530 INFO L78 Accepts]: Start accepts. Automaton has 40087 states and 59431 transitions. Word has length 108 [2020-12-22 10:22:25,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:22:25,530 INFO L481 AbstractCegarLoop]: Abstraction has 40087 states and 59431 transitions. [2020-12-22 10:22:25,531 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:22:25,531 INFO L276 IsEmpty]: Start isEmpty. Operand 40087 states and 59431 transitions. [2020-12-22 10:22:25,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-12-22 10:22:25,532 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:22:25,532 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 10:22:25,532 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 10:22:25,532 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:22:25,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:22:25,533 INFO L82 PathProgramCache]: Analyzing trace with hash 2018214719, now seen corresponding path program 1 times [2020-12-22 10:22:25,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:22:25,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394032892] [2020-12-22 10:22:25,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:22:25,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:22:25,660 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 10:22:25,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394032892] [2020-12-22 10:22:25,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:22:25,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:22:25,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648672878] [2020-12-22 10:22:25,661 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:22:25,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:22:25,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:22:25,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:22:25,662 INFO L87 Difference]: Start difference. First operand 40087 states and 59431 transitions. Second operand 8 states. [2020-12-22 10:22:30,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:22:30,234 INFO L93 Difference]: Finished difference Result 72254 states and 106008 transitions. [2020-12-22 10:22:30,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:22:30,235 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 109 [2020-12-22 10:22:30,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:22:30,349 INFO L225 Difference]: With dead ends: 72254 [2020-12-22 10:22:30,350 INFO L226 Difference]: Without dead ends: 72252 [2020-12-22 10:22:30,368 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 10:22:30,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72252 states. [2020-12-22 10:22:33,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72252 to 41623. [2020-12-22 10:22:33,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41623 states. [2020-12-22 10:22:33,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41623 states to 41623 states and 60839 transitions. [2020-12-22 10:22:33,735 INFO L78 Accepts]: Start accepts. Automaton has 41623 states and 60839 transitions. Word has length 109 [2020-12-22 10:22:33,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:22:33,735 INFO L481 AbstractCegarLoop]: Abstraction has 41623 states and 60839 transitions. [2020-12-22 10:22:33,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:22:33,736 INFO L276 IsEmpty]: Start isEmpty. Operand 41623 states and 60839 transitions. [2020-12-22 10:22:33,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-12-22 10:22:33,740 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:22:33,740 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, 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] [2020-12-22 10:22:33,740 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 10:22:33,740 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:22:33,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:22:33,741 INFO L82 PathProgramCache]: Analyzing trace with hash 2086636605, now seen corresponding path program 1 times [2020-12-22 10:22:33,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:22:33,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286676692] [2020-12-22 10:22:33,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:22:33,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:22:33,913 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:22:33,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286676692] [2020-12-22 10:22:33,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:22:33,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:22:33,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772003896] [2020-12-22 10:22:33,915 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 10:22:33,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:22:33,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 10:22:33,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 10:22:33,916 INFO L87 Difference]: Start difference. First operand 41623 states and 60839 transitions. Second operand 4 states. [2020-12-22 10:22:44,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:22:44,825 INFO L93 Difference]: Finished difference Result 45417 states and 67202 transitions. [2020-12-22 10:22:44,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 10:22:44,826 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 134 [2020-12-22 10:22:44,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:22:44,869 INFO L225 Difference]: With dead ends: 45417 [2020-12-22 10:22:44,869 INFO L226 Difference]: Without dead ends: 43125 [2020-12-22 10:22:44,880 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 10:22:44,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43125 states. [2020-12-22 10:22:47,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43125 to 42374. [2020-12-22 10:22:47,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42374 states. [2020-12-22 10:22:47,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42374 states to 42374 states and 61592 transitions. [2020-12-22 10:22:47,688 INFO L78 Accepts]: Start accepts. Automaton has 42374 states and 61592 transitions. Word has length 134 [2020-12-22 10:22:47,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:22:47,689 INFO L481 AbstractCegarLoop]: Abstraction has 42374 states and 61592 transitions. [2020-12-22 10:22:47,689 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 10:22:47,689 INFO L276 IsEmpty]: Start isEmpty. Operand 42374 states and 61592 transitions. [2020-12-22 10:22:47,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 10:22:47,718 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:22:47,718 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 10:22:47,719 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 10:22:47,719 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:22:47,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:22:47,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1243757929, now seen corresponding path program 1 times [2020-12-22 10:22:47,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:22:47,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457384839] [2020-12-22 10:22:47,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:22:47,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:22:47,967 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 10:22:47,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457384839] [2020-12-22 10:22:47,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:22:47,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:22:47,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562874628] [2020-12-22 10:22:47,969 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:22:47,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:22:47,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:22:47,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:22:47,970 INFO L87 Difference]: Start difference. First operand 42374 states and 61592 transitions. Second operand 10 states. [2020-12-22 10:23:06,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:23:06,841 INFO L93 Difference]: Finished difference Result 364312 states and 529889 transitions. [2020-12-22 10:23:06,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:23:06,842 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 149 [2020-12-22 10:23:06,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:23:07,349 INFO L225 Difference]: With dead ends: 364312 [2020-12-22 10:23:07,350 INFO L226 Difference]: Without dead ends: 325014 [2020-12-22 10:23:07,681 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 10:23:07,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325014 states. [2020-12-22 10:23:15,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325014 to 81670. [2020-12-22 10:23:15,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81670 states. [2020-12-22 10:23:15,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81670 states to 81670 states and 118424 transitions. [2020-12-22 10:23:15,429 INFO L78 Accepts]: Start accepts. Automaton has 81670 states and 118424 transitions. Word has length 149 [2020-12-22 10:23:15,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:23:15,429 INFO L481 AbstractCegarLoop]: Abstraction has 81670 states and 118424 transitions. [2020-12-22 10:23:15,429 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:23:15,430 INFO L276 IsEmpty]: Start isEmpty. Operand 81670 states and 118424 transitions. [2020-12-22 10:23:15,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 10:23:15,460 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:23:15,460 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 10:23:15,460 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 10:23:15,461 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:23:15,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:23:15,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1273280147, now seen corresponding path program 1 times [2020-12-22 10:23:15,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:23:15,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487626411] [2020-12-22 10:23:15,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:23:15,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:23:15,849 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 10:23:15,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487626411] [2020-12-22 10:23:15,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:23:15,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:23:15,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140015636] [2020-12-22 10:23:15,851 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:23:15,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:23:15,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:23:15,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:23:15,852 INFO L87 Difference]: Start difference. First operand 81670 states and 118424 transitions. Second operand 10 states. [2020-12-22 10:23:39,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:23:39,581 INFO L93 Difference]: Finished difference Result 403608 states and 586721 transitions. [2020-12-22 10:23:39,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:23:39,581 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 149 [2020-12-22 10:23:39,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:23:40,127 INFO L225 Difference]: With dead ends: 403608 [2020-12-22 10:23:40,128 INFO L226 Difference]: Without dead ends: 364310 [2020-12-22 10:23:40,229 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:23:40,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364310 states. [2020-12-22 10:23:52,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364310 to 140678. [2020-12-22 10:23:52,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140678 states. [2020-12-22 10:23:52,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140678 states to 140678 states and 203352 transitions. [2020-12-22 10:23:52,879 INFO L78 Accepts]: Start accepts. Automaton has 140678 states and 203352 transitions. Word has length 149 [2020-12-22 10:23:52,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:23:52,880 INFO L481 AbstractCegarLoop]: Abstraction has 140678 states and 203352 transitions. [2020-12-22 10:23:52,880 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:23:52,880 INFO L276 IsEmpty]: Start isEmpty. Operand 140678 states and 203352 transitions. [2020-12-22 10:23:52,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 10:23:52,926 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:23:52,926 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 10:23:52,927 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 10:23:52,927 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:23:52,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:23:52,928 INFO L82 PathProgramCache]: Analyzing trace with hash 1546967859, now seen corresponding path program 1 times [2020-12-22 10:23:52,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:23:52,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66614235] [2020-12-22 10:23:52,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:23:52,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:23:53,178 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 10:23:53,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66614235] [2020-12-22 10:23:53,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:23:53,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:23:53,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328120015] [2020-12-22 10:23:53,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:23:53,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:23:53,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:23:53,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:23:53,181 INFO L87 Difference]: Start difference. First operand 140678 states and 203352 transitions. Second operand 10 states. [2020-12-22 10:24:22,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:24:22,068 INFO L93 Difference]: Finished difference Result 442904 states and 643553 transitions. [2020-12-22 10:24:22,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:24:22,069 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 149 [2020-12-22 10:24:22,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:24:22,719 INFO L225 Difference]: With dead ends: 442904 [2020-12-22 10:24:22,719 INFO L226 Difference]: Without dead ends: 403606 [2020-12-22 10:24:22,843 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 10:24:23,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403606 states. [2020-12-22 10:24:39,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403606 to 179974. [2020-12-22 10:24:39,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179974 states. [2020-12-22 10:24:39,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179974 states to 179974 states and 260184 transitions. [2020-12-22 10:24:39,766 INFO L78 Accepts]: Start accepts. Automaton has 179974 states and 260184 transitions. Word has length 149 [2020-12-22 10:24:39,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:24:39,784 INFO L481 AbstractCegarLoop]: Abstraction has 179974 states and 260184 transitions. [2020-12-22 10:24:39,784 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:24:39,785 INFO L276 IsEmpty]: Start isEmpty. Operand 179974 states and 260184 transitions. [2020-12-22 10:24:39,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 10:24:39,809 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:24:39,809 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 10:24:39,810 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 10:24:39,810 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:24:39,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:24:39,810 INFO L82 PathProgramCache]: Analyzing trace with hash -928927789, now seen corresponding path program 1 times [2020-12-22 10:24:39,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:24:39,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061584584] [2020-12-22 10:24:39,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:24:39,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:24:40,023 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-22 10:24:40,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061584584] [2020-12-22 10:24:40,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:24:40,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:24:40,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152567310] [2020-12-22 10:24:40,025 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:24:40,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:24:40,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:24:40,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:24:40,026 INFO L87 Difference]: Start difference. First operand 179974 states and 260184 transitions. Second operand 10 states. [2020-12-22 10:25:15,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:25:15,779 INFO L93 Difference]: Finished difference Result 482200 states and 700385 transitions. [2020-12-22 10:25:15,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:25:15,779 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 149 [2020-12-22 10:25:15,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:25:16,489 INFO L225 Difference]: With dead ends: 482200 [2020-12-22 10:25:16,490 INFO L226 Difference]: Without dead ends: 442902 [2020-12-22 10:25:16,594 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 10:25:17,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442902 states.