/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.3.ufo.UNBOUNDED.pals+Problem12_label01.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 09:37:15,213 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 09:37:15,216 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 09:37:15,257 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 09:37:15,258 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 09:37:15,260 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 09:37:15,262 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 09:37:15,265 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 09:37:15,268 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 09:37:15,270 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 09:37:15,271 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 09:37:15,273 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 09:37:15,273 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 09:37:15,275 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 09:37:15,276 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 09:37:15,278 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 09:37:15,279 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 09:37:15,281 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 09:37:15,283 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 09:37:15,287 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 09:37:15,289 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 09:37:15,291 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 09:37:15,294 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 09:37:15,295 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 09:37:15,311 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 09:37:15,325 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 09:37:15,326 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 09:37:15,328 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 09:37:15,330 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 09:37:15,364 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 09:37:15,364 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 09:37:15,366 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 09:37:15,366 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 09:37:15,366 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 09:37:15,367 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 09:37:15,367 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 09:37:15,367 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 09:37:15,367 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 09:37:15,367 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 09:37:15,368 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 09:37:15,368 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 09:37:15,368 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 09:37:15,368 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 09:37:15,369 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 09:37:15,369 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 09:37:15,369 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 09:37:15,369 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:37:15,369 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 09:37:15,370 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 09:37:15,370 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 09:37:15,370 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 09:37:15,370 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 09:37:15,371 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 09:37:15,371 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 09:37:15,371 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 09:37:15,883 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 09:37:15,948 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 09:37:15,952 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 09:37:15,954 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 09:37:15,956 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 09:37:15,957 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.3.ufo.UNBOUNDED.pals+Problem12_label01.c [2020-12-22 09:37:16,063 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3dea23b8e/de15afbb42584600b6ccd6b189d67b66/FLAG4bbcdb56c [2020-12-22 09:37:17,210 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 09:37:17,211 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.3.ufo.UNBOUNDED.pals+Problem12_label01.c [2020-12-22 09:37:17,251 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3dea23b8e/de15afbb42584600b6ccd6b189d67b66/FLAG4bbcdb56c [2020-12-22 09:37:17,635 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3dea23b8e/de15afbb42584600b6ccd6b189d67b66 [2020-12-22 09:37:17,638 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 09:37:17,641 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 09:37:17,644 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 09:37:17,644 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 09:37:17,649 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 09:37:17,650 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:37:17" (1/1) ... [2020-12-22 09:37:17,652 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ebcbc35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:37:17, skipping insertion in model container [2020-12-22 09:37:17,652 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:37:17" (1/1) ... [2020-12-22 09:37:17,663 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 09:37:17,860 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 09:37:18,241 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.3.ufo.UNBOUNDED.pals+Problem12_label01.c[6508,6521] [2020-12-22 09:37:18,391 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.3.ufo.UNBOUNDED.pals+Problem12_label01.c[11820,11833] [2020-12-22 09:37:19,570 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:37:19,585 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 09:37:19,655 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.3.ufo.UNBOUNDED.pals+Problem12_label01.c[6508,6521] [2020-12-22 09:37:19,719 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.3.ufo.UNBOUNDED.pals+Problem12_label01.c[11820,11833] [2020-12-22 09:37:20,525 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:37:20,579 INFO L208 MainTranslator]: Completed translation [2020-12-22 09:37:20,580 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:37:20 WrapperNode [2020-12-22 09:37:20,580 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 09:37:20,582 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 09:37:20,582 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 09:37:20,582 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 09:37:20,598 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:37:20" (1/1) ... [2020-12-22 09:37:20,689 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:37:20" (1/1) ... [2020-12-22 09:37:21,129 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 09:37:21,130 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 09:37:21,130 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 09:37:21,130 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 09:37:21,142 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:37:20" (1/1) ... [2020-12-22 09:37:21,142 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:37:20" (1/1) ... [2020-12-22 09:37:21,302 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:37:20" (1/1) ... [2020-12-22 09:37:21,305 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:37:20" (1/1) ... [2020-12-22 09:37:21,573 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:37:20" (1/1) ... [2020-12-22 09:37:21,628 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:37:20" (1/1) ... [2020-12-22 09:37:21,859 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:37:20" (1/1) ... [2020-12-22 09:37:22,100 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 09:37:22,106 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 09:37:22,109 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 09:37:22,109 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 09:37:22,111 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:37:20" (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 09:37:22,402 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 09:37:22,402 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 09:37:22,402 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 09:37:22,402 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 09:37:28,873 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 09:37:28,874 INFO L299 CfgBuilder]: Removed 32 assume(true) statements. [2020-12-22 09:37:28,878 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:37:28 BoogieIcfgContainer [2020-12-22 09:37:28,878 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 09:37:28,881 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 09:37:28,881 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 09:37:28,886 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 09:37:28,886 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:37:17" (1/3) ... [2020-12-22 09:37:28,887 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@134bae32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:37:28, skipping insertion in model container [2020-12-22 09:37:28,887 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:37:20" (2/3) ... [2020-12-22 09:37:28,888 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@134bae32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:37:28, skipping insertion in model container [2020-12-22 09:37:28,888 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:37:28" (3/3) ... [2020-12-22 09:37:28,890 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.ufo.UNBOUNDED.pals+Problem12_label01.c [2020-12-22 09:37:28,899 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 09:37:28,908 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 09:37:28,936 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 09:37:28,981 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 09:37:28,982 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 09:37:28,982 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 09:37:28,982 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 09:37:28,982 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 09:37:28,982 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 09:37:28,982 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 09:37:28,983 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 09:37:29,027 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states. [2020-12-22 09:37:29,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 09:37:29,037 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:37:29,039 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] [2020-12-22 09:37:29,039 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:37:29,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:37:29,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1601385972, now seen corresponding path program 1 times [2020-12-22 09:37:29,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:37:29,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176795379] [2020-12-22 09:37:29,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:37:29,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:29,323 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 09:37:29,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176795379] [2020-12-22 09:37:29,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:37:29,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:37:29,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060592461] [2020-12-22 09:37:29,335 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 09:37:29,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:37:29,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 09:37:29,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 09:37:29,356 INFO L87 Difference]: Start difference. First operand 879 states. Second operand 2 states. [2020-12-22 09:37:29,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:37:29,451 INFO L93 Difference]: Finished difference Result 1734 states and 3294 transitions. [2020-12-22 09:37:29,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 09:37:29,453 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 26 [2020-12-22 09:37:29,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:37:29,486 INFO L225 Difference]: With dead ends: 1734 [2020-12-22 09:37:29,487 INFO L226 Difference]: Without dead ends: 813 [2020-12-22 09:37:29,503 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 09:37:29,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 813 states. [2020-12-22 09:37:29,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 813 to 813. [2020-12-22 09:37:29,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 813 states. [2020-12-22 09:37:29,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 813 states to 813 states and 1535 transitions. [2020-12-22 09:37:29,655 INFO L78 Accepts]: Start accepts. Automaton has 813 states and 1535 transitions. Word has length 26 [2020-12-22 09:37:29,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:37:29,656 INFO L481 AbstractCegarLoop]: Abstraction has 813 states and 1535 transitions. [2020-12-22 09:37:29,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 09:37:29,656 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states and 1535 transitions. [2020-12-22 09:37:29,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 09:37:29,659 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:37:29,660 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] [2020-12-22 09:37:29,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 09:37:29,660 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:37:29,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:37:29,662 INFO L82 PathProgramCache]: Analyzing trace with hash 783737522, now seen corresponding path program 1 times [2020-12-22 09:37:29,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:37:29,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758440740] [2020-12-22 09:37:29,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:37:29,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:29,848 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 09:37:29,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758440740] [2020-12-22 09:37:29,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:37:29,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:37:29,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979495184] [2020-12-22 09:37:29,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:37:29,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:37:29,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:37:29,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:37:29,854 INFO L87 Difference]: Start difference. First operand 813 states and 1535 transitions. Second operand 5 states. [2020-12-22 09:37:29,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:37:29,972 INFO L93 Difference]: Finished difference Result 854 states and 1597 transitions. [2020-12-22 09:37:29,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:37:29,973 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2020-12-22 09:37:29,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:37:29,979 INFO L225 Difference]: With dead ends: 854 [2020-12-22 09:37:29,980 INFO L226 Difference]: Without dead ends: 813 [2020-12-22 09:37:29,981 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 09:37:29,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 813 states. [2020-12-22 09:37:30,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 813 to 813. [2020-12-22 09:37:30,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 813 states. [2020-12-22 09:37:30,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 813 states to 813 states and 1519 transitions. [2020-12-22 09:37:30,012 INFO L78 Accepts]: Start accepts. Automaton has 813 states and 1519 transitions. Word has length 26 [2020-12-22 09:37:30,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:37:30,012 INFO L481 AbstractCegarLoop]: Abstraction has 813 states and 1519 transitions. [2020-12-22 09:37:30,012 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:37:30,012 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states and 1519 transitions. [2020-12-22 09:37:30,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-22 09:37:30,014 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:37:30,014 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] [2020-12-22 09:37:30,015 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 09:37:30,015 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:37:30,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:37:30,016 INFO L82 PathProgramCache]: Analyzing trace with hash -698732182, now seen corresponding path program 1 times [2020-12-22 09:37:30,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:37:30,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095283625] [2020-12-22 09:37:30,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:37:30,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:30,200 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 09:37:30,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095283625] [2020-12-22 09:37:30,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:37:30,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:37:30,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157925259] [2020-12-22 09:37:30,202 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:37:30,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:37:30,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:37:30,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:37:30,210 INFO L87 Difference]: Start difference. First operand 813 states and 1519 transitions. Second operand 3 states. [2020-12-22 09:37:30,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:37:30,260 INFO L93 Difference]: Finished difference Result 881 states and 1625 transitions. [2020-12-22 09:37:30,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:37:30,261 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 41 [2020-12-22 09:37:30,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:37:30,273 INFO L225 Difference]: With dead ends: 881 [2020-12-22 09:37:30,274 INFO L226 Difference]: Without dead ends: 844 [2020-12-22 09:37:30,276 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 09:37:30,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 844 states. [2020-12-22 09:37:30,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 844 to 842. [2020-12-22 09:37:30,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 842 states. [2020-12-22 09:37:30,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 1565 transitions. [2020-12-22 09:37:30,324 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 1565 transitions. Word has length 41 [2020-12-22 09:37:30,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:37:30,326 INFO L481 AbstractCegarLoop]: Abstraction has 842 states and 1565 transitions. [2020-12-22 09:37:30,326 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:37:30,326 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 1565 transitions. [2020-12-22 09:37:30,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-22 09:37:30,332 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:37:30,332 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] [2020-12-22 09:37:30,333 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 09:37:30,333 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:37:30,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:37:30,337 INFO L82 PathProgramCache]: Analyzing trace with hash -360939040, now seen corresponding path program 1 times [2020-12-22 09:37:30,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:37:30,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385415375] [2020-12-22 09:37:30,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:37:30,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:30,429 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 09:37:30,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385415375] [2020-12-22 09:37:30,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:37:30,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:37:30,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264295408] [2020-12-22 09:37:30,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:37:30,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:37:30,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:37:30,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:37:30,436 INFO L87 Difference]: Start difference. First operand 842 states and 1565 transitions. Second operand 3 states. [2020-12-22 09:37:30,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:37:30,495 INFO L93 Difference]: Finished difference Result 962 states and 1753 transitions. [2020-12-22 09:37:30,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:37:30,496 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 41 [2020-12-22 09:37:30,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:37:30,503 INFO L225 Difference]: With dead ends: 962 [2020-12-22 09:37:30,503 INFO L226 Difference]: Without dead ends: 896 [2020-12-22 09:37:30,504 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 09:37:30,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 896 states. [2020-12-22 09:37:30,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 896 to 894. [2020-12-22 09:37:30,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 894 states. [2020-12-22 09:37:30,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 894 states to 894 states and 1646 transitions. [2020-12-22 09:37:30,537 INFO L78 Accepts]: Start accepts. Automaton has 894 states and 1646 transitions. Word has length 41 [2020-12-22 09:37:30,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:37:30,537 INFO L481 AbstractCegarLoop]: Abstraction has 894 states and 1646 transitions. [2020-12-22 09:37:30,537 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:37:30,538 INFO L276 IsEmpty]: Start isEmpty. Operand 894 states and 1646 transitions. [2020-12-22 09:37:30,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-22 09:37:30,539 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:37:30,539 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] [2020-12-22 09:37:30,539 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 09:37:30,540 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:37:30,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:37:30,540 INFO L82 PathProgramCache]: Analyzing trace with hash 857046358, now seen corresponding path program 1 times [2020-12-22 09:37:30,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:37:30,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714615721] [2020-12-22 09:37:30,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:37:30,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:30,666 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 09:37:30,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714615721] [2020-12-22 09:37:30,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:37:30,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:37:30,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912451797] [2020-12-22 09:37:30,671 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:37:30,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:37:30,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:37:30,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:37:30,673 INFO L87 Difference]: Start difference. First operand 894 states and 1646 transitions. Second operand 5 states. [2020-12-22 09:37:30,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:37:30,923 INFO L93 Difference]: Finished difference Result 1602 states and 2756 transitions. [2020-12-22 09:37:30,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:37:30,924 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 41 [2020-12-22 09:37:30,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:37:30,934 INFO L225 Difference]: With dead ends: 1602 [2020-12-22 09:37:30,934 INFO L226 Difference]: Without dead ends: 1484 [2020-12-22 09:37:30,936 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:37:30,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1484 states. [2020-12-22 09:37:31,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1484 to 1010. [2020-12-22 09:37:31,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1010 states. [2020-12-22 09:37:31,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1010 states to 1010 states and 1822 transitions. [2020-12-22 09:37:31,055 INFO L78 Accepts]: Start accepts. Automaton has 1010 states and 1822 transitions. Word has length 41 [2020-12-22 09:37:31,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:37:31,057 INFO L481 AbstractCegarLoop]: Abstraction has 1010 states and 1822 transitions. [2020-12-22 09:37:31,058 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:37:31,058 INFO L276 IsEmpty]: Start isEmpty. Operand 1010 states and 1822 transitions. [2020-12-22 09:37:31,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 09:37:31,060 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:37:31,060 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] [2020-12-22 09:37:31,061 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 09:37:31,061 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:37:31,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:37:31,062 INFO L82 PathProgramCache]: Analyzing trace with hash 1867096070, now seen corresponding path program 1 times [2020-12-22 09:37:31,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:37:31,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336918347] [2020-12-22 09:37:31,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:37:31,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:31,171 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 09:37:31,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336918347] [2020-12-22 09:37:31,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:37:31,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:37:31,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633676640] [2020-12-22 09:37:31,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:37:31,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:37:31,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:37:31,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:37:31,175 INFO L87 Difference]: Start difference. First operand 1010 states and 1822 transitions. Second operand 3 states. [2020-12-22 09:37:31,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:37:31,243 INFO L93 Difference]: Finished difference Result 1434 states and 2468 transitions. [2020-12-22 09:37:31,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:37:31,244 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 43 [2020-12-22 09:37:31,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:37:31,252 INFO L225 Difference]: With dead ends: 1434 [2020-12-22 09:37:31,252 INFO L226 Difference]: Without dead ends: 1200 [2020-12-22 09:37:31,254 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 09:37:31,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1200 states. [2020-12-22 09:37:31,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1200 to 1190. [2020-12-22 09:37:31,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1190 states. [2020-12-22 09:37:31,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1190 states to 1190 states and 2078 transitions. [2020-12-22 09:37:31,303 INFO L78 Accepts]: Start accepts. Automaton has 1190 states and 2078 transitions. Word has length 43 [2020-12-22 09:37:31,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:37:31,303 INFO L481 AbstractCegarLoop]: Abstraction has 1190 states and 2078 transitions. [2020-12-22 09:37:31,303 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:37:31,303 INFO L276 IsEmpty]: Start isEmpty. Operand 1190 states and 2078 transitions. [2020-12-22 09:37:31,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 09:37:31,305 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:37:31,305 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] [2020-12-22 09:37:31,307 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 09:37:31,309 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:37:31,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:37:31,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1933589582, now seen corresponding path program 1 times [2020-12-22 09:37:31,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:37:31,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014872119] [2020-12-22 09:37:31,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:37:31,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:31,474 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 09:37:31,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014872119] [2020-12-22 09:37:31,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:37:31,476 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:37:31,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819664626] [2020-12-22 09:37:31,478 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:37:31,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:37:31,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:37:31,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:37:31,479 INFO L87 Difference]: Start difference. First operand 1190 states and 2078 transitions. Second operand 5 states. [2020-12-22 09:37:31,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:37:31,614 INFO L93 Difference]: Finished difference Result 1606 states and 2696 transitions. [2020-12-22 09:37:31,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:37:31,615 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 43 [2020-12-22 09:37:31,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:37:31,623 INFO L225 Difference]: With dead ends: 1606 [2020-12-22 09:37:31,624 INFO L226 Difference]: Without dead ends: 1192 [2020-12-22 09:37:31,625 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:37:31,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1192 states. [2020-12-22 09:37:31,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1192 to 1190. [2020-12-22 09:37:31,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1190 states. [2020-12-22 09:37:31,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1190 states to 1190 states and 2070 transitions. [2020-12-22 09:37:31,676 INFO L78 Accepts]: Start accepts. Automaton has 1190 states and 2070 transitions. Word has length 43 [2020-12-22 09:37:31,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:37:31,676 INFO L481 AbstractCegarLoop]: Abstraction has 1190 states and 2070 transitions. [2020-12-22 09:37:31,676 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:37:31,677 INFO L276 IsEmpty]: Start isEmpty. Operand 1190 states and 2070 transitions. [2020-12-22 09:37:31,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-22 09:37:31,677 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:37:31,677 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] [2020-12-22 09:37:31,678 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 09:37:31,678 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:37:31,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:37:31,678 INFO L82 PathProgramCache]: Analyzing trace with hash -602988295, now seen corresponding path program 1 times [2020-12-22 09:37:31,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:37:31,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389306051] [2020-12-22 09:37:31,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:37:31,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:31,813 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 09:37:31,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389306051] [2020-12-22 09:37:31,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:37:31,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 09:37:31,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303580488] [2020-12-22 09:37:31,815 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 09:37:31,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:37:31,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 09:37:31,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:37:31,816 INFO L87 Difference]: Start difference. First operand 1190 states and 2070 transitions. Second operand 8 states. [2020-12-22 09:37:32,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:37:32,079 INFO L93 Difference]: Finished difference Result 1516 states and 2534 transitions. [2020-12-22 09:37:32,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 09:37:32,080 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 44 [2020-12-22 09:37:32,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:37:32,090 INFO L225 Difference]: With dead ends: 1516 [2020-12-22 09:37:32,090 INFO L226 Difference]: Without dead ends: 1514 [2020-12-22 09:37:32,091 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 09:37:32,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1514 states. [2020-12-22 09:37:32,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1514 to 1214. [2020-12-22 09:37:32,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1214 states. [2020-12-22 09:37:32,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1214 states to 1214 states and 2090 transitions. [2020-12-22 09:37:32,154 INFO L78 Accepts]: Start accepts. Automaton has 1214 states and 2090 transitions. Word has length 44 [2020-12-22 09:37:32,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:37:32,154 INFO L481 AbstractCegarLoop]: Abstraction has 1214 states and 2090 transitions. [2020-12-22 09:37:32,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 09:37:32,154 INFO L276 IsEmpty]: Start isEmpty. Operand 1214 states and 2090 transitions. [2020-12-22 09:37:32,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-22 09:37:32,155 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:37:32,155 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] [2020-12-22 09:37:32,156 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 09:37:32,156 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:37:32,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:37:32,156 INFO L82 PathProgramCache]: Analyzing trace with hash -1900121563, now seen corresponding path program 1 times [2020-12-22 09:37:32,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:37:32,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536813589] [2020-12-22 09:37:32,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:37:32,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:32,241 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 09:37:32,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536813589] [2020-12-22 09:37:32,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:37:32,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:37:32,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446040878] [2020-12-22 09:37:32,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:37:32,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:37:32,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:37:32,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:37:32,247 INFO L87 Difference]: Start difference. First operand 1214 states and 2090 transitions. Second operand 3 states. [2020-12-22 09:37:32,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:37:32,331 INFO L93 Difference]: Finished difference Result 1669 states and 2752 transitions. [2020-12-22 09:37:32,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:37:32,332 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 45 [2020-12-22 09:37:32,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:37:32,344 INFO L225 Difference]: With dead ends: 1669 [2020-12-22 09:37:32,344 INFO L226 Difference]: Without dead ends: 1410 [2020-12-22 09:37:32,346 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 09:37:32,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1410 states. [2020-12-22 09:37:32,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1410 to 1408. [2020-12-22 09:37:32,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1408 states. [2020-12-22 09:37:32,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1408 states to 1408 states and 2360 transitions. [2020-12-22 09:37:32,423 INFO L78 Accepts]: Start accepts. Automaton has 1408 states and 2360 transitions. Word has length 45 [2020-12-22 09:37:32,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:37:32,423 INFO L481 AbstractCegarLoop]: Abstraction has 1408 states and 2360 transitions. [2020-12-22 09:37:32,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:37:32,424 INFO L276 IsEmpty]: Start isEmpty. Operand 1408 states and 2360 transitions. [2020-12-22 09:37:32,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-22 09:37:32,424 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:37:32,425 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:37:32,425 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 09:37:32,425 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:37:32,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:37:32,426 INFO L82 PathProgramCache]: Analyzing trace with hash -570412811, now seen corresponding path program 1 times [2020-12-22 09:37:32,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:37:32,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711452431] [2020-12-22 09:37:32,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:37:32,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:32,595 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 09:37:32,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711452431] [2020-12-22 09:37:32,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:37:32,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:37:32,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830593450] [2020-12-22 09:37:32,598 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:37:32,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:37:32,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:37:32,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:37:32,599 INFO L87 Difference]: Start difference. First operand 1408 states and 2360 transitions. Second operand 4 states. [2020-12-22 09:37:45,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:37:45,775 INFO L93 Difference]: Finished difference Result 3663 states and 6669 transitions. [2020-12-22 09:37:45,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:37:45,776 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 48 [2020-12-22 09:37:45,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:37:45,793 INFO L225 Difference]: With dead ends: 3663 [2020-12-22 09:37:45,794 INFO L226 Difference]: Without dead ends: 2910 [2020-12-22 09:37:45,796 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 09:37:45,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2910 states. [2020-12-22 09:37:45,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2910 to 2910. [2020-12-22 09:37:45,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2910 states. [2020-12-22 09:37:45,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2910 states to 2910 states and 4474 transitions. [2020-12-22 09:37:45,920 INFO L78 Accepts]: Start accepts. Automaton has 2910 states and 4474 transitions. Word has length 48 [2020-12-22 09:37:45,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:37:45,920 INFO L481 AbstractCegarLoop]: Abstraction has 2910 states and 4474 transitions. [2020-12-22 09:37:45,920 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:37:45,920 INFO L276 IsEmpty]: Start isEmpty. Operand 2910 states and 4474 transitions. [2020-12-22 09:37:45,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 09:37:45,922 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:37:45,922 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:37:45,922 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 09:37:45,922 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:37:45,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:37:45,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1836022441, now seen corresponding path program 1 times [2020-12-22 09:37:45,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:37:45,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008945185] [2020-12-22 09:37:45,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:37:45,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:46,005 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 09:37:46,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008945185] [2020-12-22 09:37:46,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:37:46,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:37:46,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393932929] [2020-12-22 09:37:46,007 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:37:46,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:37:46,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:37:46,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:37:46,008 INFO L87 Difference]: Start difference. First operand 2910 states and 4474 transitions. Second operand 5 states. [2020-12-22 09:37:46,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:37:46,300 INFO L93 Difference]: Finished difference Result 4938 states and 7350 transitions. [2020-12-22 09:37:46,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:37:46,301 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2020-12-22 09:37:46,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:37:46,328 INFO L225 Difference]: With dead ends: 4938 [2020-12-22 09:37:46,329 INFO L226 Difference]: Without dead ends: 4308 [2020-12-22 09:37:46,333 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:37:46,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4308 states. [2020-12-22 09:37:46,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4308 to 3538. [2020-12-22 09:37:46,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3538 states. [2020-12-22 09:37:46,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3538 states to 3538 states and 5358 transitions. [2020-12-22 09:37:46,523 INFO L78 Accepts]: Start accepts. Automaton has 3538 states and 5358 transitions. Word has length 63 [2020-12-22 09:37:46,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:37:46,524 INFO L481 AbstractCegarLoop]: Abstraction has 3538 states and 5358 transitions. [2020-12-22 09:37:46,524 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:37:46,524 INFO L276 IsEmpty]: Start isEmpty. Operand 3538 states and 5358 transitions. [2020-12-22 09:37:46,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 09:37:46,525 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:37:46,525 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:37:46,526 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 09:37:46,526 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:37:46,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:37:46,527 INFO L82 PathProgramCache]: Analyzing trace with hash 67239625, now seen corresponding path program 1 times [2020-12-22 09:37:46,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:37:46,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536647967] [2020-12-22 09:37:46,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:37:46,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:46,625 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 09:37:46,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536647967] [2020-12-22 09:37:46,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:37:46,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:37:46,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26555857] [2020-12-22 09:37:46,627 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:37:46,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:37:46,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:37:46,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:37:46,633 INFO L87 Difference]: Start difference. First operand 3538 states and 5358 transitions. Second operand 5 states. [2020-12-22 09:37:47,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:37:47,066 INFO L93 Difference]: Finished difference Result 5566 states and 8234 transitions. [2020-12-22 09:37:47,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:37:47,068 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2020-12-22 09:37:47,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:37:47,099 INFO L225 Difference]: With dead ends: 5566 [2020-12-22 09:37:47,099 INFO L226 Difference]: Without dead ends: 4936 [2020-12-22 09:37:47,107 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:37:47,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4936 states. [2020-12-22 09:37:47,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4936 to 4482. [2020-12-22 09:37:47,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4482 states. [2020-12-22 09:37:47,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4482 states to 4482 states and 6674 transitions. [2020-12-22 09:37:47,441 INFO L78 Accepts]: Start accepts. Automaton has 4482 states and 6674 transitions. Word has length 63 [2020-12-22 09:37:47,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:37:47,442 INFO L481 AbstractCegarLoop]: Abstraction has 4482 states and 6674 transitions. [2020-12-22 09:37:47,442 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:37:47,443 INFO L276 IsEmpty]: Start isEmpty. Operand 4482 states and 6674 transitions. [2020-12-22 09:37:47,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 09:37:47,445 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:37:47,445 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:37:47,445 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 09:37:47,446 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:37:47,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:37:47,446 INFO L82 PathProgramCache]: Analyzing trace with hash 2131767521, now seen corresponding path program 1 times [2020-12-22 09:37:47,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:37:47,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061400280] [2020-12-22 09:37:47,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:37:47,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:47,512 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:37:47,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061400280] [2020-12-22 09:37:47,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:37:47,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:37:47,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997474276] [2020-12-22 09:37:47,514 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:37:47,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:37:47,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:37:47,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:37:47,524 INFO L87 Difference]: Start difference. First operand 4482 states and 6674 transitions. Second operand 3 states. [2020-12-22 09:37:47,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:37:47,712 INFO L93 Difference]: Finished difference Result 6075 states and 8941 transitions. [2020-12-22 09:37:47,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:37:47,712 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2020-12-22 09:37:47,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:37:47,755 INFO L225 Difference]: With dead ends: 6075 [2020-12-22 09:37:47,755 INFO L226 Difference]: Without dead ends: 3873 [2020-12-22 09:37:47,762 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 09:37:47,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3873 states. [2020-12-22 09:37:47,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3873 to 3871. [2020-12-22 09:37:47,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3871 states. [2020-12-22 09:37:47,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3871 states to 3871 states and 5814 transitions. [2020-12-22 09:37:47,962 INFO L78 Accepts]: Start accepts. Automaton has 3871 states and 5814 transitions. Word has length 65 [2020-12-22 09:37:47,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:37:47,962 INFO L481 AbstractCegarLoop]: Abstraction has 3871 states and 5814 transitions. [2020-12-22 09:37:47,963 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:37:47,963 INFO L276 IsEmpty]: Start isEmpty. Operand 3871 states and 5814 transitions. [2020-12-22 09:37:47,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 09:37:47,967 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:37:47,968 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:37:47,968 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 09:37:47,968 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:37:47,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:37:47,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1187468114, now seen corresponding path program 1 times [2020-12-22 09:37:47,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:37:47,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496666564] [2020-12-22 09:37:47,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:37:48,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:48,063 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:37:48,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496666564] [2020-12-22 09:37:48,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:37:48,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:37:48,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588978100] [2020-12-22 09:37:48,065 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:37:48,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:37:48,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:37:48,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:37:48,066 INFO L87 Difference]: Start difference. First operand 3871 states and 5814 transitions. Second operand 5 states. [2020-12-22 09:37:48,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:37:48,369 INFO L93 Difference]: Finished difference Result 5223 states and 7738 transitions. [2020-12-22 09:37:48,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:37:48,371 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 65 [2020-12-22 09:37:48,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:37:48,386 INFO L225 Difference]: With dead ends: 5223 [2020-12-22 09:37:48,386 INFO L226 Difference]: Without dead ends: 4773 [2020-12-22 09:37:48,391 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:37:48,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4773 states. [2020-12-22 09:37:48,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4773 to 4319. [2020-12-22 09:37:48,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4319 states. [2020-12-22 09:37:48,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4319 states to 4319 states and 6446 transitions. [2020-12-22 09:37:48,717 INFO L78 Accepts]: Start accepts. Automaton has 4319 states and 6446 transitions. Word has length 65 [2020-12-22 09:37:48,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:37:48,718 INFO L481 AbstractCegarLoop]: Abstraction has 4319 states and 6446 transitions. [2020-12-22 09:37:48,718 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:37:48,718 INFO L276 IsEmpty]: Start isEmpty. Operand 4319 states and 6446 transitions. [2020-12-22 09:37:48,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:37:48,724 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:37:48,724 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:37:48,724 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 09:37:48,724 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:37:48,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:37:48,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1662229482, now seen corresponding path program 1 times [2020-12-22 09:37:48,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:37:48,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665908016] [2020-12-22 09:37:48,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:37:48,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:49,030 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:37:49,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665908016] [2020-12-22 09:37:49,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364403421] [2020-12-22 09:37:49,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:37:49,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:49,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 09:37:49,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:37:49,654 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:37:49,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:37:49,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4] total 12 [2020-12-22 09:37:49,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364425647] [2020-12-22 09:37:49,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 09:37:49,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:37:49,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 09:37:49,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-12-22 09:37:49,660 INFO L87 Difference]: Start difference. First operand 4319 states and 6446 transitions. Second operand 12 states. [2020-12-22 09:37:53,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:37:53,329 INFO L93 Difference]: Finished difference Result 13613 states and 19202 transitions. [2020-12-22 09:37:53,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-22 09:37:53,329 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 66 [2020-12-22 09:37:53,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:37:53,357 INFO L225 Difference]: With dead ends: 13613 [2020-12-22 09:37:53,357 INFO L226 Difference]: Without dead ends: 11595 [2020-12-22 09:37:53,366 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 571 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=441, Invalid=1629, Unknown=0, NotChecked=0, Total=2070 [2020-12-22 09:37:53,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11595 states. [2020-12-22 09:37:54,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11595 to 8331. [2020-12-22 09:37:54,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8331 states. [2020-12-22 09:37:54,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8331 states to 8331 states and 11723 transitions. [2020-12-22 09:37:54,203 INFO L78 Accepts]: Start accepts. Automaton has 8331 states and 11723 transitions. Word has length 66 [2020-12-22 09:37:54,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:37:54,204 INFO L481 AbstractCegarLoop]: Abstraction has 8331 states and 11723 transitions. [2020-12-22 09:37:54,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 09:37:54,204 INFO L276 IsEmpty]: Start isEmpty. Operand 8331 states and 11723 transitions. [2020-12-22 09:37:54,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:37:54,206 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:37:54,206 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:37:54,421 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-22 09:37:54,422 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:37:54,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:37:54,423 INFO L82 PathProgramCache]: Analyzing trace with hash -44763738, now seen corresponding path program 1 times [2020-12-22 09:37:54,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:37:54,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647544913] [2020-12-22 09:37:54,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:37:54,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:54,751 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:37:54,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647544913] [2020-12-22 09:37:54,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554294437] [2020-12-22 09:37:54,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:37:54,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:54,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 09:37:54,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:37:55,137 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:37:55,492 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:37:55,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:37:55,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:37:55,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680042249] [2020-12-22 09:37:55,494 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:37:55,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:37:55,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:37:55,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:37:55,495 INFO L87 Difference]: Start difference. First operand 8331 states and 11723 transitions. Second operand 17 states. [2020-12-22 09:37:57,595 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2020-12-22 09:38:00,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:38:00,409 INFO L93 Difference]: Finished difference Result 32202 states and 43781 transitions. [2020-12-22 09:38:00,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 09:38:00,410 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 67 [2020-12-22 09:38:00,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:38:00,479 INFO L225 Difference]: With dead ends: 32202 [2020-12-22 09:38:00,480 INFO L226 Difference]: Without dead ends: 27291 [2020-12-22 09:38:00,494 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=331, Invalid=1075, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 09:38:00,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27291 states. [2020-12-22 09:38:01,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27291 to 16004. [2020-12-22 09:38:01,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16004 states. [2020-12-22 09:38:01,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16004 states to 16004 states and 22009 transitions. [2020-12-22 09:38:01,791 INFO L78 Accepts]: Start accepts. Automaton has 16004 states and 22009 transitions. Word has length 67 [2020-12-22 09:38:01,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:38:01,791 INFO L481 AbstractCegarLoop]: Abstraction has 16004 states and 22009 transitions. [2020-12-22 09:38:01,792 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:38:01,792 INFO L276 IsEmpty]: Start isEmpty. Operand 16004 states and 22009 transitions. [2020-12-22 09:38:01,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:38:01,794 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:38:01,794 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:38:02,007 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-22 09:38:02,008 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:38:02,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:38:02,009 INFO L82 PathProgramCache]: Analyzing trace with hash -2066736808, now seen corresponding path program 1 times [2020-12-22 09:38:02,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:38:02,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568610151] [2020-12-22 09:38:02,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:38:02,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:38:02,331 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:38:02,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568610151] [2020-12-22 09:38:02,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242412252] [2020-12-22 09:38:02,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:38:02,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:38:02,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 09:38:02,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:38:02,662 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:38:03,068 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:38:03,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:38:03,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:38:03,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748664669] [2020-12-22 09:38:03,071 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:38:03,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:38:03,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:38:03,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:38:03,077 INFO L87 Difference]: Start difference. First operand 16004 states and 22009 transitions. Second operand 17 states. [2020-12-22 09:38:11,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:38:11,084 INFO L93 Difference]: Finished difference Result 77443 states and 104665 transitions. [2020-12-22 09:38:11,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 09:38:11,084 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 67 [2020-12-22 09:38:11,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:38:11,283 INFO L225 Difference]: With dead ends: 77443 [2020-12-22 09:38:11,284 INFO L226 Difference]: Without dead ends: 66013 [2020-12-22 09:38:11,314 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=591, Invalid=1665, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 09:38:11,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66013 states. [2020-12-22 09:38:15,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66013 to 34055. [2020-12-22 09:38:15,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34055 states. [2020-12-22 09:38:15,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34055 states to 34055 states and 46277 transitions. [2020-12-22 09:38:15,052 INFO L78 Accepts]: Start accepts. Automaton has 34055 states and 46277 transitions. Word has length 67 [2020-12-22 09:38:15,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:38:15,052 INFO L481 AbstractCegarLoop]: Abstraction has 34055 states and 46277 transitions. [2020-12-22 09:38:15,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:38:15,052 INFO L276 IsEmpty]: Start isEmpty. Operand 34055 states and 46277 transitions. [2020-12-22 09:38:15,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:38:15,055 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:38:15,055 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:38:15,268 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 09:38:15,269 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:38:15,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:38:15,270 INFO L82 PathProgramCache]: Analyzing trace with hash -848751410, now seen corresponding path program 1 times [2020-12-22 09:38:15,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:38:15,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006709676] [2020-12-22 09:38:15,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:38:15,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:38:15,353 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:38:15,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006709676] [2020-12-22 09:38:15,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:38:15,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:38:15,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694934835] [2020-12-22 09:38:15,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:38:15,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:38:15,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:38:15,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:38:15,356 INFO L87 Difference]: Start difference. First operand 34055 states and 46277 transitions. Second operand 3 states. [2020-12-22 09:38:17,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:38:17,014 INFO L93 Difference]: Finished difference Result 49273 states and 66886 transitions. [2020-12-22 09:38:17,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:38:17,015 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 67 [2020-12-22 09:38:17,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:38:17,076 INFO L225 Difference]: With dead ends: 49273 [2020-12-22 09:38:17,076 INFO L226 Difference]: Without dead ends: 20761 [2020-12-22 09:38:17,115 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 09:38:17,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20761 states. [2020-12-22 09:38:19,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20761 to 20525. [2020-12-22 09:38:19,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20525 states. [2020-12-22 09:38:19,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20525 states to 20525 states and 27439 transitions. [2020-12-22 09:38:19,403 INFO L78 Accepts]: Start accepts. Automaton has 20525 states and 27439 transitions. Word has length 67 [2020-12-22 09:38:19,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:38:19,403 INFO L481 AbstractCegarLoop]: Abstraction has 20525 states and 27439 transitions. [2020-12-22 09:38:19,403 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:38:19,403 INFO L276 IsEmpty]: Start isEmpty. Operand 20525 states and 27439 transitions. [2020-12-22 09:38:19,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:38:19,406 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:38:19,406 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:38:19,406 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 09:38:19,406 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:38:19,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:38:19,407 INFO L82 PathProgramCache]: Analyzing trace with hash -2096259026, now seen corresponding path program 1 times [2020-12-22 09:38:19,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:38:19,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663399455] [2020-12-22 09:38:19,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:38:19,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:38:19,453 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:38:19,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663399455] [2020-12-22 09:38:19,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:38:19,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:38:19,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592707737] [2020-12-22 09:38:19,455 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:38:19,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:38:19,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:38:19,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:38:19,456 INFO L87 Difference]: Start difference. First operand 20525 states and 27439 transitions. Second operand 3 states. [2020-12-22 09:38:20,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:38:20,554 INFO L93 Difference]: Finished difference Result 30427 states and 40570 transitions. [2020-12-22 09:38:20,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:38:20,555 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 67 [2020-12-22 09:38:20,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:38:20,584 INFO L225 Difference]: With dead ends: 30427 [2020-12-22 09:38:20,584 INFO L226 Difference]: Without dead ends: 14415 [2020-12-22 09:38:20,601 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 09:38:20,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14415 states. [2020-12-22 09:38:21,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14415 to 14413. [2020-12-22 09:38:21,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14413 states. [2020-12-22 09:38:21,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14413 states to 14413 states and 19062 transitions. [2020-12-22 09:38:21,768 INFO L78 Accepts]: Start accepts. Automaton has 14413 states and 19062 transitions. Word has length 67 [2020-12-22 09:38:21,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:38:21,770 INFO L481 AbstractCegarLoop]: Abstraction has 14413 states and 19062 transitions. [2020-12-22 09:38:21,770 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:38:21,770 INFO L276 IsEmpty]: Start isEmpty. Operand 14413 states and 19062 transitions. [2020-12-22 09:38:21,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:38:21,772 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:38:21,772 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:38:21,772 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 09:38:21,773 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:38:21,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:38:21,773 INFO L82 PathProgramCache]: Analyzing trace with hash 873869654, now seen corresponding path program 1 times [2020-12-22 09:38:21,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:38:21,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235127210] [2020-12-22 09:38:21,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:38:21,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:38:21,853 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 09:38:21,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235127210] [2020-12-22 09:38:21,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:38:21,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:38:21,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767879421] [2020-12-22 09:38:21,856 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:38:21,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:38:21,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:38:21,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:38:21,858 INFO L87 Difference]: Start difference. First operand 14413 states and 19062 transitions. Second operand 6 states. [2020-12-22 09:38:23,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:38:23,473 INFO L93 Difference]: Finished difference Result 24176 states and 31614 transitions. [2020-12-22 09:38:23,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:38:23,474 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-12-22 09:38:23,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:38:23,494 INFO L225 Difference]: With dead ends: 24176 [2020-12-22 09:38:23,494 INFO L226 Difference]: Without dead ends: 12124 [2020-12-22 09:38:23,507 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:38:23,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12124 states. [2020-12-22 09:38:24,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12124 to 12124. [2020-12-22 09:38:24,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12124 states. [2020-12-22 09:38:24,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12124 states to 12124 states and 15943 transitions. [2020-12-22 09:38:24,617 INFO L78 Accepts]: Start accepts. Automaton has 12124 states and 15943 transitions. Word has length 67 [2020-12-22 09:38:24,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:38:24,617 INFO L481 AbstractCegarLoop]: Abstraction has 12124 states and 15943 transitions. [2020-12-22 09:38:24,617 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:38:24,617 INFO L276 IsEmpty]: Start isEmpty. Operand 12124 states and 15943 transitions. [2020-12-22 09:38:24,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:38:24,619 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:38:24,619 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:38:24,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 09:38:24,619 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:38:24,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:38:24,620 INFO L82 PathProgramCache]: Analyzing trace with hash 1198871190, now seen corresponding path program 1 times [2020-12-22 09:38:24,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:38:24,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967451583] [2020-12-22 09:38:24,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:38:24,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:38:24,689 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 09:38:24,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967451583] [2020-12-22 09:38:24,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:38:24,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:38:24,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99614189] [2020-12-22 09:38:24,691 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:38:24,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:38:24,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:38:24,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:38:24,692 INFO L87 Difference]: Start difference. First operand 12124 states and 15943 transitions. Second operand 6 states. [2020-12-22 09:38:25,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:38:25,816 INFO L93 Difference]: Finished difference Result 19293 states and 25006 transitions. [2020-12-22 09:38:25,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:38:25,817 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-12-22 09:38:25,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:38:25,829 INFO L225 Difference]: With dead ends: 19293 [2020-12-22 09:38:25,829 INFO L226 Difference]: Without dead ends: 9564 [2020-12-22 09:38:25,836 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:38:25,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9564 states. [2020-12-22 09:38:26,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9564 to 9564. [2020-12-22 09:38:26,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9564 states. [2020-12-22 09:38:26,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9564 states to 9564 states and 12595 transitions. [2020-12-22 09:38:26,653 INFO L78 Accepts]: Start accepts. Automaton has 9564 states and 12595 transitions. Word has length 67 [2020-12-22 09:38:26,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:38:26,653 INFO L481 AbstractCegarLoop]: Abstraction has 9564 states and 12595 transitions. [2020-12-22 09:38:26,653 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:38:26,653 INFO L276 IsEmpty]: Start isEmpty. Operand 9564 states and 12595 transitions. [2020-12-22 09:38:26,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:38:26,654 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:38:26,654 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:38:26,654 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 09:38:26,654 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:38:26,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:38:26,655 INFO L82 PathProgramCache]: Analyzing trace with hash -49807498, now seen corresponding path program 1 times [2020-12-22 09:38:26,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:38:26,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333902602] [2020-12-22 09:38:26,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:38:26,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:38:26,737 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 09:38:26,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333902602] [2020-12-22 09:38:26,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:38:26,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:38:26,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474095396] [2020-12-22 09:38:26,739 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:38:26,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:38:26,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:38:26,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:38:26,739 INFO L87 Difference]: Start difference. First operand 9564 states and 12595 transitions. Second operand 6 states. [2020-12-22 09:38:27,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:38:27,385 INFO L93 Difference]: Finished difference Result 15114 states and 19540 transitions. [2020-12-22 09:38:27,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:38:27,389 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-12-22 09:38:27,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:38:27,399 INFO L225 Difference]: With dead ends: 15114 [2020-12-22 09:38:27,399 INFO L226 Difference]: Without dead ends: 7867 [2020-12-22 09:38:27,405 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:38:27,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7867 states. [2020-12-22 09:38:28,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7867 to 7867. [2020-12-22 09:38:28,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7867 states. [2020-12-22 09:38:28,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7867 states to 7867 states and 10449 transitions. [2020-12-22 09:38:28,094 INFO L78 Accepts]: Start accepts. Automaton has 7867 states and 10449 transitions. Word has length 67 [2020-12-22 09:38:28,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:38:28,095 INFO L481 AbstractCegarLoop]: Abstraction has 7867 states and 10449 transitions. [2020-12-22 09:38:28,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:38:28,095 INFO L276 IsEmpty]: Start isEmpty. Operand 7867 states and 10449 transitions. [2020-12-22 09:38:28,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 09:38:28,097 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:38:28,097 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:38:28,097 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 09:38:28,097 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:38:28,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:38:28,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1937529655, now seen corresponding path program 1 times [2020-12-22 09:38:28,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:38:28,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135497279] [2020-12-22 09:38:28,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:38:28,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:38:28,706 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:38:28,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135497279] [2020-12-22 09:38:28,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068430884] [2020-12-22 09:38:28,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:38:28,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:38:28,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-22 09:38:28,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:38:29,653 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:38:29,680 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:38:29,682 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:38:29,693 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:38:30,210 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:38:30,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:38:30,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 26 [2020-12-22 09:38:30,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145085907] [2020-12-22 09:38:30,212 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-22 09:38:30,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:38:30,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-22 09:38:30,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2020-12-22 09:38:30,214 INFO L87 Difference]: Start difference. First operand 7867 states and 10449 transitions. Second operand 26 states. [2020-12-22 09:38:31,272 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2020-12-22 09:38:31,563 WARN L197 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 51 [2020-12-22 09:38:31,853 WARN L197 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2020-12-22 09:38:32,063 WARN L197 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2020-12-22 09:38:32,281 WARN L197 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2020-12-22 09:38:32,515 WARN L197 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2020-12-22 09:38:32,778 WARN L197 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 61 [2020-12-22 09:38:33,059 WARN L197 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2020-12-22 09:38:33,259 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2020-12-22 09:38:33,425 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2020-12-22 09:38:33,599 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2020-12-22 09:38:34,090 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 39 [2020-12-22 09:38:34,494 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 34 [2020-12-22 09:38:34,675 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2020-12-22 09:38:35,576 WARN L197 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2020-12-22 09:38:36,142 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2020-12-22 09:38:36,842 WARN L197 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 56 [2020-12-22 09:38:37,219 WARN L197 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2020-12-22 09:38:37,525 WARN L197 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 54 [2020-12-22 09:38:37,746 WARN L197 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 44 [2020-12-22 09:38:38,021 WARN L197 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2020-12-22 09:38:38,240 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2020-12-22 09:38:38,469 WARN L197 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 42 [2020-12-22 09:38:38,732 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 34 [2020-12-22 09:38:38,895 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2020-12-22 09:38:39,300 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 34 [2020-12-22 09:38:41,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:38:41,377 INFO L93 Difference]: Finished difference Result 13998 states and 18142 transitions. [2020-12-22 09:38:41,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-12-22 09:38:41,378 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 68 [2020-12-22 09:38:41,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:38:41,390 INFO L225 Difference]: With dead ends: 13998 [2020-12-22 09:38:41,390 INFO L226 Difference]: Without dead ends: 11093 [2020-12-22 09:38:41,398 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2087 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=1297, Invalid=6359, Unknown=0, NotChecked=0, Total=7656 [2020-12-22 09:38:41,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11093 states. [2020-12-22 09:38:42,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11093 to 7029. [2020-12-22 09:38:42,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7029 states. [2020-12-22 09:38:42,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7029 states to 7029 states and 9468 transitions. [2020-12-22 09:38:42,103 INFO L78 Accepts]: Start accepts. Automaton has 7029 states and 9468 transitions. Word has length 68 [2020-12-22 09:38:42,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:38:42,103 INFO L481 AbstractCegarLoop]: Abstraction has 7029 states and 9468 transitions. [2020-12-22 09:38:42,103 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-22 09:38:42,103 INFO L276 IsEmpty]: Start isEmpty. Operand 7029 states and 9468 transitions. [2020-12-22 09:38:42,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 09:38:42,104 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:38:42,104 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:38:42,305 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:38:42,305 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:38:42,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:38:42,306 INFO L82 PathProgramCache]: Analyzing trace with hash 75217277, now seen corresponding path program 1 times [2020-12-22 09:38:42,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:38:42,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420748715] [2020-12-22 09:38:42,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:38:42,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:38:43,244 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:38:43,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420748715] [2020-12-22 09:38:43,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290352236] [2020-12-22 09:38:43,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:38:43,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:38:43,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-22 09:38:43,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:38:45,408 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 2, 1] term [2020-12-22 09:38:45,408 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:38:45,413 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 09:38:46,026 WARN L197 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 44