/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.BOUNDED-6.pals+Problem12_label07.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 09:37:10,338 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 09:37:10,342 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 09:37:10,383 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 09:37:10,384 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 09:37:10,386 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 09:37:10,389 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 09:37:10,392 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 09:37:10,422 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 09:37:10,424 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 09:37:10,426 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 09:37:10,429 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 09:37:10,430 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 09:37:10,431 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 09:37:10,433 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 09:37:10,436 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 09:37:10,438 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 09:37:10,440 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 09:37:10,442 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 09:37:10,445 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 09:37:10,448 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 09:37:10,451 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 09:37:10,452 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 09:37:10,454 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 09:37:10,458 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 09:37:10,473 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 09:37:10,474 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 09:37:10,476 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 09:37:10,477 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 09:37:10,511 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 09:37:10,512 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 09:37:10,513 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 09:37:10,513 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 09:37:10,514 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 09:37:10,514 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 09:37:10,514 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 09:37:10,515 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 09:37:10,515 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 09:37:10,515 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 09:37:10,516 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 09:37:10,516 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 09:37:10,516 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 09:37:10,516 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 09:37:10,517 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 09:37:10,517 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 09:37:10,517 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 09:37:10,518 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:37:10,518 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 09:37:10,518 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 09:37:10,519 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 09:37:10,519 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 09:37:10,519 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 09:37:10,520 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 09:37:10,520 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 09:37:10,520 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 09:37:11,044 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 09:37:11,096 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 09:37:11,102 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 09:37:11,105 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 09:37:11,106 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 09:37:11,108 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.3.ufo.BOUNDED-6.pals+Problem12_label07.c [2020-12-22 09:37:11,237 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/089deb829/59a20186d9a948b5a5f24d9cc4ac79b0/FLAG65af3cbdf [2020-12-22 09:37:12,573 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 09:37:12,574 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.3.ufo.BOUNDED-6.pals+Problem12_label07.c [2020-12-22 09:37:12,618 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/089deb829/59a20186d9a948b5a5f24d9cc4ac79b0/FLAG65af3cbdf [2020-12-22 09:37:12,947 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/089deb829/59a20186d9a948b5a5f24d9cc4ac79b0 [2020-12-22 09:37:12,951 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 09:37:12,954 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 09:37:12,957 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 09:37:12,957 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 09:37:12,962 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 09:37:12,963 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:37:12" (1/1) ... [2020-12-22 09:37:12,965 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@692e3489 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:37:12, skipping insertion in model container [2020-12-22 09:37:12,966 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:37:12" (1/1) ... [2020-12-22 09:37:12,977 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 09:37:13,188 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 09:37:13,519 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.BOUNDED-6.pals+Problem12_label07.c[6412,6425] [2020-12-22 09:37:13,557 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.BOUNDED-6.pals+Problem12_label07.c[7011,7024] [2020-12-22 09:37:15,033 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:37:15,048 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 09:37:15,177 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.BOUNDED-6.pals+Problem12_label07.c[6412,6425] [2020-12-22 09:37:15,181 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.BOUNDED-6.pals+Problem12_label07.c[7011,7024] [2020-12-22 09:37:15,966 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:37:16,029 INFO L208 MainTranslator]: Completed translation [2020-12-22 09:37:16,029 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:37:16 WrapperNode [2020-12-22 09:37:16,030 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 09:37:16,032 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 09:37:16,037 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 09:37:16,038 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 09:37:16,052 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:37:16" (1/1) ... [2020-12-22 09:37:16,155 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:37:16" (1/1) ... [2020-12-22 09:37:16,648 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 09:37:16,651 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 09:37:16,651 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 09:37:16,652 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 09:37:16,664 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:37:16" (1/1) ... [2020-12-22 09:37:16,664 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:37:16" (1/1) ... [2020-12-22 09:37:16,745 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:37:16" (1/1) ... [2020-12-22 09:37:16,745 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:37:16" (1/1) ... [2020-12-22 09:37:17,056 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:37:16" (1/1) ... [2020-12-22 09:37:17,166 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:37:16" (1/1) ... [2020-12-22 09:37:17,275 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:37:16" (1/1) ... [2020-12-22 09:37:17,410 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 09:37:17,413 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 09:37:17,413 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 09:37:17,413 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 09:37:17,415 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:37:16" (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 09:37:17,563 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 09:37:17,563 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 09:37:17,563 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 09:37:17,564 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 09:37:24,322 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 09:37:24,323 INFO L299 CfgBuilder]: Removed 30 assume(true) statements. [2020-12-22 09:37:24,328 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:37:24 BoogieIcfgContainer [2020-12-22 09:37:24,330 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 09:37:24,335 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 09:37:24,338 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 09:37:24,343 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 09:37:24,344 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:37:12" (1/3) ... [2020-12-22 09:37:24,345 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fe60fd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:37:24, skipping insertion in model container [2020-12-22 09:37:24,346 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:37:16" (2/3) ... [2020-12-22 09:37:24,346 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fe60fd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:37:24, skipping insertion in model container [2020-12-22 09:37:24,346 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:37:24" (3/3) ... [2020-12-22 09:37:24,348 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.ufo.BOUNDED-6.pals+Problem12_label07.c [2020-12-22 09:37:24,358 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 09:37:24,366 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 09:37:24,390 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 09:37:24,457 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 09:37:24,458 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 09:37:24,458 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 09:37:24,458 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 09:37:24,458 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 09:37:24,458 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 09:37:24,459 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 09:37:24,459 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 09:37:24,510 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states. [2020-12-22 09:37:24,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-22 09:37:24,522 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:37:24,524 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:37:24,525 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:37:24,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:37:24,542 INFO L82 PathProgramCache]: Analyzing trace with hash 2057058801, now seen corresponding path program 1 times [2020-12-22 09:37:24,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:37:24,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439980249] [2020-12-22 09:37:24,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:37:24,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:24,882 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 09:37:24,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439980249] [2020-12-22 09:37:24,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:37:24,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:37:24,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816335037] [2020-12-22 09:37:24,894 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:37:24,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:37:24,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:37:24,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:37:24,921 INFO L87 Difference]: Start difference. First operand 878 states. Second operand 3 states. [2020-12-22 09:37:32,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:37:32,918 INFO L93 Difference]: Finished difference Result 2505 states and 4810 transitions. [2020-12-22 09:37:32,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:37:32,920 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2020-12-22 09:37:32,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:37:32,964 INFO L225 Difference]: With dead ends: 2505 [2020-12-22 09:37:32,965 INFO L226 Difference]: Without dead ends: 1563 [2020-12-22 09:37:32,976 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:37:33,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1563 states. [2020-12-22 09:37:33,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1563 to 1563. [2020-12-22 09:37:33,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1563 states. [2020-12-22 09:37:33,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1563 states to 1563 states and 2512 transitions. [2020-12-22 09:37:33,153 INFO L78 Accepts]: Start accepts. Automaton has 1563 states and 2512 transitions. Word has length 7 [2020-12-22 09:37:33,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:37:33,153 INFO L481 AbstractCegarLoop]: Abstraction has 1563 states and 2512 transitions. [2020-12-22 09:37:33,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:37:33,154 INFO L276 IsEmpty]: Start isEmpty. Operand 1563 states and 2512 transitions. [2020-12-22 09:37:33,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 09:37:33,156 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:37:33,156 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 09:37:33,156 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 09:37:33,157 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:37:33,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:37:33,158 INFO L82 PathProgramCache]: Analyzing trace with hash 157814817, now seen corresponding path program 1 times [2020-12-22 09:37:33,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:37:33,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899052579] [2020-12-22 09:37:33,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:37:33,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:33,299 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 09:37:33,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899052579] [2020-12-22 09:37:33,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:37:33,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:37:33,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273714385] [2020-12-22 09:37:33,302 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:37:33,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:37:33,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:37:33,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:37:33,303 INFO L87 Difference]: Start difference. First operand 1563 states and 2512 transitions. Second operand 5 states. [2020-12-22 09:37:33,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:37:33,411 INFO L93 Difference]: Finished difference Result 1639 states and 2628 transitions. [2020-12-22 09:37:33,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:37:33,412 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2020-12-22 09:37:33,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:37:33,425 INFO L225 Difference]: With dead ends: 1639 [2020-12-22 09:37:33,426 INFO L226 Difference]: Without dead ends: 1599 [2020-12-22 09:37:33,429 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 09:37:33,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1599 states. [2020-12-22 09:37:33,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1599 to 1563. [2020-12-22 09:37:33,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1563 states. [2020-12-22 09:37:33,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1563 states to 1563 states and 2496 transitions. [2020-12-22 09:37:33,490 INFO L78 Accepts]: Start accepts. Automaton has 1563 states and 2496 transitions. Word has length 26 [2020-12-22 09:37:33,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:37:33,491 INFO L481 AbstractCegarLoop]: Abstraction has 1563 states and 2496 transitions. [2020-12-22 09:37:33,491 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:37:33,491 INFO L276 IsEmpty]: Start isEmpty. Operand 1563 states and 2496 transitions. [2020-12-22 09:37:33,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-22 09:37:33,493 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:37:33,493 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 09:37:33,494 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 09:37:33,494 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:37:33,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:37:33,495 INFO L82 PathProgramCache]: Analyzing trace with hash -1324654887, now seen corresponding path program 1 times [2020-12-22 09:37:33,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:37:33,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716858104] [2020-12-22 09:37:33,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:37:33,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:33,595 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 09:37:33,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716858104] [2020-12-22 09:37:33,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:37:33,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:37:33,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120145727] [2020-12-22 09:37:33,597 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:37:33,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:37:33,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:37:33,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:37:33,599 INFO L87 Difference]: Start difference. First operand 1563 states and 2496 transitions. Second operand 3 states. [2020-12-22 09:37:33,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:37:33,659 INFO L93 Difference]: Finished difference Result 1629 states and 2598 transitions. [2020-12-22 09:37:33,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:37:33,660 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 41 [2020-12-22 09:37:33,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:37:33,671 INFO L225 Difference]: With dead ends: 1629 [2020-12-22 09:37:33,671 INFO L226 Difference]: Without dead ends: 1593 [2020-12-22 09:37:33,673 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 09:37:33,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1593 states. [2020-12-22 09:37:33,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1593 to 1591. [2020-12-22 09:37:33,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1591 states. [2020-12-22 09:37:33,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1591 states to 1591 states and 2540 transitions. [2020-12-22 09:37:33,743 INFO L78 Accepts]: Start accepts. Automaton has 1591 states and 2540 transitions. Word has length 41 [2020-12-22 09:37:33,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:37:33,744 INFO L481 AbstractCegarLoop]: Abstraction has 1591 states and 2540 transitions. [2020-12-22 09:37:33,744 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:37:33,744 INFO L276 IsEmpty]: Start isEmpty. Operand 1591 states and 2540 transitions. [2020-12-22 09:37:33,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-22 09:37:33,746 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:37:33,746 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 09:37:33,747 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 09:37:33,748 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:37:33,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:37:33,750 INFO L82 PathProgramCache]: Analyzing trace with hash 1376027727, now seen corresponding path program 1 times [2020-12-22 09:37:33,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:37:33,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936374369] [2020-12-22 09:37:33,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:37:33,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:33,975 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 09:37:33,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936374369] [2020-12-22 09:37:33,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:37:33,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:37:33,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149249282] [2020-12-22 09:37:33,977 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:37:33,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:37:33,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:37:33,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:37:33,979 INFO L87 Difference]: Start difference. First operand 1591 states and 2540 transitions. Second operand 5 states. [2020-12-22 09:37:34,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:37:34,222 INFO L93 Difference]: Finished difference Result 1975 states and 3140 transitions. [2020-12-22 09:37:34,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:37:34,223 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 41 [2020-12-22 09:37:34,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:37:34,237 INFO L225 Difference]: With dead ends: 1975 [2020-12-22 09:37:34,237 INFO L226 Difference]: Without dead ends: 1911 [2020-12-22 09:37:34,240 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 09:37:34,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1911 states. [2020-12-22 09:37:34,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1911 to 1653. [2020-12-22 09:37:34,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1653 states. [2020-12-22 09:37:34,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1653 states to 1653 states and 2635 transitions. [2020-12-22 09:37:34,320 INFO L78 Accepts]: Start accepts. Automaton has 1653 states and 2635 transitions. Word has length 41 [2020-12-22 09:37:34,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:37:34,322 INFO L481 AbstractCegarLoop]: Abstraction has 1653 states and 2635 transitions. [2020-12-22 09:37:34,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:37:34,322 INFO L276 IsEmpty]: Start isEmpty. Operand 1653 states and 2635 transitions. [2020-12-22 09:37:34,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 09:37:34,335 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:37:34,335 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 09:37:34,335 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 09:37:34,336 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:37:34,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:37:34,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1902982177, now seen corresponding path program 1 times [2020-12-22 09:37:34,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:37:34,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746704057] [2020-12-22 09:37:34,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:37:34,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:34,502 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 09:37:34,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746704057] [2020-12-22 09:37:34,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:37:34,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:37:34,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804184805] [2020-12-22 09:37:34,504 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:37:34,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:37:34,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:37:34,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:37:34,505 INFO L87 Difference]: Start difference. First operand 1653 states and 2635 transitions. Second operand 3 states. [2020-12-22 09:37:34,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:37:34,564 INFO L93 Difference]: Finished difference Result 1840 states and 2922 transitions. [2020-12-22 09:37:34,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:37:34,564 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 43 [2020-12-22 09:37:34,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:37:34,578 INFO L225 Difference]: With dead ends: 1840 [2020-12-22 09:37:34,579 INFO L226 Difference]: Without dead ends: 1714 [2020-12-22 09:37:34,581 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 09:37:34,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1714 states. [2020-12-22 09:37:34,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1714 to 1712. [2020-12-22 09:37:34,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1712 states. [2020-12-22 09:37:34,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1712 states to 1712 states and 2723 transitions. [2020-12-22 09:37:34,645 INFO L78 Accepts]: Start accepts. Automaton has 1712 states and 2723 transitions. Word has length 43 [2020-12-22 09:37:34,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:37:34,646 INFO L481 AbstractCegarLoop]: Abstraction has 1712 states and 2723 transitions. [2020-12-22 09:37:34,646 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:37:34,646 INFO L276 IsEmpty]: Start isEmpty. Operand 1712 states and 2723 transitions. [2020-12-22 09:37:34,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 09:37:34,647 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:37:34,647 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:37:34,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 09:37:34,648 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:37:34,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:37:34,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1836488665, now seen corresponding path program 1 times [2020-12-22 09:37:34,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:37:34,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755300514] [2020-12-22 09:37:34,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:37:34,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:34,860 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 09:37:34,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755300514] [2020-12-22 09:37:34,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:37:34,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:37:34,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938485168] [2020-12-22 09:37:34,862 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:37:34,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:37:34,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:37:34,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:37:34,864 INFO L87 Difference]: Start difference. First operand 1712 states and 2723 transitions. Second operand 5 states. [2020-12-22 09:37:35,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:37:35,021 INFO L93 Difference]: Finished difference Result 1897 states and 3005 transitions. [2020-12-22 09:37:35,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:37:35,021 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 43 [2020-12-22 09:37:35,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:37:35,038 INFO L225 Difference]: With dead ends: 1897 [2020-12-22 09:37:35,038 INFO L226 Difference]: Without dead ends: 1714 [2020-12-22 09:37:35,040 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 09:37:35,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1714 states. [2020-12-22 09:37:35,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1714 to 1712. [2020-12-22 09:37:35,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1712 states. [2020-12-22 09:37:35,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1712 states to 1712 states and 2720 transitions. [2020-12-22 09:37:35,106 INFO L78 Accepts]: Start accepts. Automaton has 1712 states and 2720 transitions. Word has length 43 [2020-12-22 09:37:35,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:37:35,107 INFO L481 AbstractCegarLoop]: Abstraction has 1712 states and 2720 transitions. [2020-12-22 09:37:35,107 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:37:35,107 INFO L276 IsEmpty]: Start isEmpty. Operand 1712 states and 2720 transitions. [2020-12-22 09:37:35,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 09:37:35,108 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:37:35,108 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 09:37:35,108 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 09:37:35,109 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:37:35,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:37:35,116 INFO L82 PathProgramCache]: Analyzing trace with hash -47574589, now seen corresponding path program 1 times [2020-12-22 09:37:35,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:37:35,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575527096] [2020-12-22 09:37:35,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:37:35,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:35,194 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 09:37:35,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575527096] [2020-12-22 09:37:35,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:37:35,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:37:35,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546578117] [2020-12-22 09:37:35,196 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:37:35,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:37:35,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:37:35,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:37:35,199 INFO L87 Difference]: Start difference. First operand 1712 states and 2720 transitions. Second operand 3 states. [2020-12-22 09:37:35,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:37:35,262 INFO L93 Difference]: Finished difference Result 2042 states and 3216 transitions. [2020-12-22 09:37:35,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:37:35,263 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 43 [2020-12-22 09:37:35,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:37:35,274 INFO L225 Difference]: With dead ends: 2042 [2020-12-22 09:37:35,274 INFO L226 Difference]: Without dead ends: 1859 [2020-12-22 09:37:35,277 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 09:37:35,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1859 states. [2020-12-22 09:37:35,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1859 to 1857. [2020-12-22 09:37:35,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1857 states. [2020-12-22 09:37:35,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1857 states to 1857 states and 2931 transitions. [2020-12-22 09:37:35,350 INFO L78 Accepts]: Start accepts. Automaton has 1857 states and 2931 transitions. Word has length 43 [2020-12-22 09:37:35,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:37:35,352 INFO L481 AbstractCegarLoop]: Abstraction has 1857 states and 2931 transitions. [2020-12-22 09:37:35,352 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:37:35,352 INFO L276 IsEmpty]: Start isEmpty. Operand 1857 states and 2931 transitions. [2020-12-22 09:37:35,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 09:37:35,354 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:37:35,354 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 09:37:35,355 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 09:37:35,355 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:37:35,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:37:35,356 INFO L82 PathProgramCache]: Analyzing trace with hash 1199933027, now seen corresponding path program 1 times [2020-12-22 09:37:35,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:37:35,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184227333] [2020-12-22 09:37:35,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:37:35,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:35,430 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 09:37:35,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184227333] [2020-12-22 09:37:35,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:37:35,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:37:35,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535685014] [2020-12-22 09:37:35,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:37:35,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:37:35,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:37:35,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:37:35,436 INFO L87 Difference]: Start difference. First operand 1857 states and 2931 transitions. Second operand 3 states. [2020-12-22 09:37:35,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:37:35,519 INFO L93 Difference]: Finished difference Result 2441 states and 3789 transitions. [2020-12-22 09:37:35,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:37:35,520 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 43 [2020-12-22 09:37:35,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:37:35,534 INFO L225 Difference]: With dead ends: 2441 [2020-12-22 09:37:35,534 INFO L226 Difference]: Without dead ends: 2113 [2020-12-22 09:37:35,537 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 09:37:35,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2113 states. [2020-12-22 09:37:35,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2113 to 2111. [2020-12-22 09:37:35,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2111 states. [2020-12-22 09:37:35,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2111 states to 2111 states and 3287 transitions. [2020-12-22 09:37:35,639 INFO L78 Accepts]: Start accepts. Automaton has 2111 states and 3287 transitions. Word has length 43 [2020-12-22 09:37:35,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:37:35,639 INFO L481 AbstractCegarLoop]: Abstraction has 2111 states and 3287 transitions. [2020-12-22 09:37:35,640 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:37:35,640 INFO L276 IsEmpty]: Start isEmpty. Operand 2111 states and 3287 transitions. [2020-12-22 09:37:35,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-22 09:37:35,640 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:37:35,640 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 09:37:35,641 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 09:37:35,641 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:37:35,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:37:35,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1511296967, now seen corresponding path program 1 times [2020-12-22 09:37:35,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:37:35,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900569378] [2020-12-22 09:37:35,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:37:35,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:35,795 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 09:37:35,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900569378] [2020-12-22 09:37:35,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:37:35,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:37:35,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575044389] [2020-12-22 09:37:35,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:37:35,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:37:35,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:37:35,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:37:35,804 INFO L87 Difference]: Start difference. First operand 2111 states and 3287 transitions. Second operand 5 states. [2020-12-22 09:37:35,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:37:35,978 INFO L93 Difference]: Finished difference Result 2634 states and 4015 transitions. [2020-12-22 09:37:35,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:37:35,979 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 44 [2020-12-22 09:37:35,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:37:35,998 INFO L225 Difference]: With dead ends: 2634 [2020-12-22 09:37:35,999 INFO L226 Difference]: Without dead ends: 2632 [2020-12-22 09:37:36,002 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:37:36,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2632 states. [2020-12-22 09:37:36,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2632 to 2159. [2020-12-22 09:37:36,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2159 states. [2020-12-22 09:37:36,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2159 states to 2159 states and 3331 transitions. [2020-12-22 09:37:36,140 INFO L78 Accepts]: Start accepts. Automaton has 2159 states and 3331 transitions. Word has length 44 [2020-12-22 09:37:36,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:37:36,140 INFO L481 AbstractCegarLoop]: Abstraction has 2159 states and 3331 transitions. [2020-12-22 09:37:36,140 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:37:36,140 INFO L276 IsEmpty]: Start isEmpty. Operand 2159 states and 3331 transitions. [2020-12-22 09:37:36,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:37:36,142 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:37:36,142 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] [2020-12-22 09:37:36,142 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 09:37:36,143 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:37:36,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:37:36,143 INFO L82 PathProgramCache]: Analyzing trace with hash -213997176, now seen corresponding path program 1 times [2020-12-22 09:37:36,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:37:36,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39998052] [2020-12-22 09:37:36,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:37:36,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:36,309 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 09:37:36,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39998052] [2020-12-22 09:37:36,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:37:36,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:37:36,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579395315] [2020-12-22 09:37:36,311 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:37:36,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:37:36,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:37:36,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:37:36,312 INFO L87 Difference]: Start difference. First operand 2159 states and 3331 transitions. Second operand 5 states. [2020-12-22 09:37:36,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:37:36,613 INFO L93 Difference]: Finished difference Result 4187 states and 6179 transitions. [2020-12-22 09:37:36,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:37:36,614 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 64 [2020-12-22 09:37:36,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:37:36,636 INFO L225 Difference]: With dead ends: 4187 [2020-12-22 09:37:36,636 INFO L226 Difference]: Without dead ends: 3557 [2020-12-22 09:37:36,640 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 09:37:36,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3557 states. [2020-12-22 09:37:36,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3557 to 2787. [2020-12-22 09:37:36,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2787 states. [2020-12-22 09:37:36,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2787 states to 2787 states and 4207 transitions. [2020-12-22 09:37:36,821 INFO L78 Accepts]: Start accepts. Automaton has 2787 states and 4207 transitions. Word has length 64 [2020-12-22 09:37:36,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:37:36,823 INFO L481 AbstractCegarLoop]: Abstraction has 2787 states and 4207 transitions. [2020-12-22 09:37:36,823 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:37:36,823 INFO L276 IsEmpty]: Start isEmpty. Operand 2787 states and 4207 transitions. [2020-12-22 09:37:36,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:37:36,825 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:37:36,825 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] [2020-12-22 09:37:36,825 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 09:37:36,826 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:37:36,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:37:36,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1033510440, now seen corresponding path program 1 times [2020-12-22 09:37:36,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:37:36,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500770209] [2020-12-22 09:37:36,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:37:36,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:36,990 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 09:37:36,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500770209] [2020-12-22 09:37:36,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:37:36,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:37:36,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758567373] [2020-12-22 09:37:36,992 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:37:36,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:37:36,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:37:36,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:37:36,994 INFO L87 Difference]: Start difference. First operand 2787 states and 4207 transitions. Second operand 5 states. [2020-12-22 09:37:37,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:37:37,406 INFO L93 Difference]: Finished difference Result 4815 states and 7055 transitions. [2020-12-22 09:37:37,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:37:37,408 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 64 [2020-12-22 09:37:37,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:37:37,456 INFO L225 Difference]: With dead ends: 4815 [2020-12-22 09:37:37,457 INFO L226 Difference]: Without dead ends: 4185 [2020-12-22 09:37:37,469 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 09:37:37,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4185 states. [2020-12-22 09:37:37,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4185 to 3731. [2020-12-22 09:37:37,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3731 states. [2020-12-22 09:37:37,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3731 states to 3731 states and 5511 transitions. [2020-12-22 09:37:37,805 INFO L78 Accepts]: Start accepts. Automaton has 3731 states and 5511 transitions. Word has length 64 [2020-12-22 09:37:37,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:37:37,806 INFO L481 AbstractCegarLoop]: Abstraction has 3731 states and 5511 transitions. [2020-12-22 09:37:37,806 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:37:37,806 INFO L276 IsEmpty]: Start isEmpty. Operand 3731 states and 5511 transitions. [2020-12-22 09:37:37,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:37:37,809 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:37:37,809 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:37:37,809 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 09:37:37,811 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:37:37,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:37:37,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1792023874, now seen corresponding path program 1 times [2020-12-22 09:37:37,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:37:37,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328969486] [2020-12-22 09:37:37,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:37:37,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:37,932 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:37:37,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328969486] [2020-12-22 09:37:37,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:37:37,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:37:37,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289649961] [2020-12-22 09:37:37,935 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:37:37,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:37:37,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:37:37,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:37:37,936 INFO L87 Difference]: Start difference. First operand 3731 states and 5511 transitions. Second operand 5 states. [2020-12-22 09:37:38,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:37:38,407 INFO L93 Difference]: Finished difference Result 5083 states and 7435 transitions. [2020-12-22 09:37:38,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:37:38,408 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 64 [2020-12-22 09:37:38,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:37:38,426 INFO L225 Difference]: With dead ends: 5083 [2020-12-22 09:37:38,426 INFO L226 Difference]: Without dead ends: 4633 [2020-12-22 09:37:38,431 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 09:37:38,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4633 states. [2020-12-22 09:37:38,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4633 to 4179. [2020-12-22 09:37:38,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4179 states. [2020-12-22 09:37:38,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4179 states to 4179 states and 6143 transitions. [2020-12-22 09:37:38,773 INFO L78 Accepts]: Start accepts. Automaton has 4179 states and 6143 transitions. Word has length 64 [2020-12-22 09:37:38,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:37:38,774 INFO L481 AbstractCegarLoop]: Abstraction has 4179 states and 6143 transitions. [2020-12-22 09:37:38,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:37:38,774 INFO L276 IsEmpty]: Start isEmpty. Operand 4179 states and 6143 transitions. [2020-12-22 09:37:38,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 09:37:38,776 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:37:38,776 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:37:38,777 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 09:37:38,777 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:37:38,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:37:38,777 INFO L82 PathProgramCache]: Analyzing trace with hash 322769619, now seen corresponding path program 1 times [2020-12-22 09:37:38,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:37:38,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551880665] [2020-12-22 09:37:38,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:37:38,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:38,869 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:37:38,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551880665] [2020-12-22 09:37:38,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:37:38,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:37:38,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199672163] [2020-12-22 09:37:38,871 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:37:38,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:37:38,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:37:38,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:37:38,880 INFO L87 Difference]: Start difference. First operand 4179 states and 6143 transitions. Second operand 3 states. [2020-12-22 09:37:39,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:37:39,156 INFO L93 Difference]: Finished difference Result 6831 states and 9845 transitions. [2020-12-22 09:37:39,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:37:39,157 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2020-12-22 09:37:39,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:37:39,170 INFO L225 Difference]: With dead ends: 6831 [2020-12-22 09:37:39,170 INFO L226 Difference]: Without dead ends: 4181 [2020-12-22 09:37:39,176 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 09:37:39,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4181 states. [2020-12-22 09:37:39,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4181 to 4179. [2020-12-22 09:37:39,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4179 states. [2020-12-22 09:37:39,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4179 states to 4179 states and 6093 transitions. [2020-12-22 09:37:39,457 INFO L78 Accepts]: Start accepts. Automaton has 4179 states and 6093 transitions. Word has length 65 [2020-12-22 09:37:39,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:37:39,458 INFO L481 AbstractCegarLoop]: Abstraction has 4179 states and 6093 transitions. [2020-12-22 09:37:39,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:37:39,458 INFO L276 IsEmpty]: Start isEmpty. Operand 4179 states and 6093 transitions. [2020-12-22 09:37:39,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 09:37:39,465 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:37:39,466 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:37:39,466 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 09:37:39,466 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:37:39,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:37:39,467 INFO L82 PathProgramCache]: Analyzing trace with hash 235650825, now seen corresponding path program 1 times [2020-12-22 09:37:39,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:37:39,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376344006] [2020-12-22 09:37:39,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:37:39,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:39,627 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 09:37:39,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376344006] [2020-12-22 09:37:39,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:37:39,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:37:39,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783366658] [2020-12-22 09:37:39,629 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:37:39,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:37:39,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:37:39,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:37:39,630 INFO L87 Difference]: Start difference. First operand 4179 states and 6093 transitions. Second operand 3 states. [2020-12-22 09:37:39,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:37:39,784 INFO L93 Difference]: Finished difference Result 5507 states and 7920 transitions. [2020-12-22 09:37:39,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:37:39,785 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2020-12-22 09:37:39,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:37:39,795 INFO L225 Difference]: With dead ends: 5507 [2020-12-22 09:37:39,796 INFO L226 Difference]: Without dead ends: 2857 [2020-12-22 09:37:39,804 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 09:37:39,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2857 states. [2020-12-22 09:37:39,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2857 to 2855. [2020-12-22 09:37:39,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2855 states. [2020-12-22 09:37:39,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2855 states to 2855 states and 4243 transitions. [2020-12-22 09:37:39,970 INFO L78 Accepts]: Start accepts. Automaton has 2855 states and 4243 transitions. Word has length 65 [2020-12-22 09:37:39,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:37:39,970 INFO L481 AbstractCegarLoop]: Abstraction has 2855 states and 4243 transitions. [2020-12-22 09:37:39,970 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:37:39,970 INFO L276 IsEmpty]: Start isEmpty. Operand 2855 states and 4243 transitions. [2020-12-22 09:37:39,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 09:37:39,975 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:37:39,975 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] [2020-12-22 09:37:39,976 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 09:37:39,976 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:37:39,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:37:39,976 INFO L82 PathProgramCache]: Analyzing trace with hash -883624385, now seen corresponding path program 1 times [2020-12-22 09:37:39,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:37:39,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14269260] [2020-12-22 09:37:39,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:37:40,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:40,093 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 09:37:40,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14269260] [2020-12-22 09:37:40,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631289213] [2020-12-22 09:37:40,094 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 09:37:40,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:40,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 09:37:40,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:37:40,565 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 09:37:40,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:37:40,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 9] total 10 [2020-12-22 09:37:40,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099116764] [2020-12-22 09:37:40,567 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 09:37:40,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:37:40,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 09:37:40,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-12-22 09:37:40,568 INFO L87 Difference]: Start difference. First operand 2855 states and 4243 transitions. Second operand 10 states. [2020-12-22 09:37:41,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:37:41,005 INFO L93 Difference]: Finished difference Result 4704 states and 6780 transitions. [2020-12-22 09:37:41,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 09:37:41,006 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 65 [2020-12-22 09:37:41,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:37:41,019 INFO L225 Difference]: With dead ends: 4704 [2020-12-22 09:37:41,019 INFO L226 Difference]: Without dead ends: 3694 [2020-12-22 09:37:41,023 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2020-12-22 09:37:41,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3694 states. [2020-12-22 09:37:41,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3694 to 3661. [2020-12-22 09:37:41,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3661 states. [2020-12-22 09:37:41,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3661 states to 3661 states and 5299 transitions. [2020-12-22 09:37:41,283 INFO L78 Accepts]: Start accepts. Automaton has 3661 states and 5299 transitions. Word has length 65 [2020-12-22 09:37:41,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:37:41,283 INFO L481 AbstractCegarLoop]: Abstraction has 3661 states and 5299 transitions. [2020-12-22 09:37:41,284 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 09:37:41,284 INFO L276 IsEmpty]: Start isEmpty. Operand 3661 states and 5299 transitions. [2020-12-22 09:37:41,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:37:41,285 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:37:41,285 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] [2020-12-22 09:37:41,499 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-22 09:37:41,500 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:37:41,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:37:41,501 INFO L82 PathProgramCache]: Analyzing trace with hash 752221610, now seen corresponding path program 1 times [2020-12-22 09:37:41,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:37:41,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495052834] [2020-12-22 09:37:41,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:37:41,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:41,857 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 09:37:41,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495052834] [2020-12-22 09:37:41,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734419246] [2020-12-22 09:37:41,858 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 09:37:41,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:41,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 09:37:42,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:37:42,320 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:37:42,769 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 09:37:42,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:37:42,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:37:42,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71739051] [2020-12-22 09:37:42,771 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:37:42,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:37:42,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:37:42,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:37:42,773 INFO L87 Difference]: Start difference. First operand 3661 states and 5299 transitions. Second operand 17 states. [2020-12-22 09:37:44,730 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 22 [2020-12-22 09:37:45,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:37:45,831 INFO L93 Difference]: Finished difference Result 10680 states and 14569 transitions. [2020-12-22 09:37:45,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 09:37:45,831 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 66 [2020-12-22 09:37:45,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:37:45,858 INFO L225 Difference]: With dead ends: 10680 [2020-12-22 09:37:45,859 INFO L226 Difference]: Without dead ends: 9189 [2020-12-22 09:37:45,867 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=280, Invalid=910, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 09:37:45,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9189 states. [2020-12-22 09:37:46,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9189 to 6136. [2020-12-22 09:37:46,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6136 states. [2020-12-22 09:37:46,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6136 states to 6136 states and 8577 transitions. [2020-12-22 09:37:46,484 INFO L78 Accepts]: Start accepts. Automaton has 6136 states and 8577 transitions. Word has length 66 [2020-12-22 09:37:46,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:37:46,485 INFO L481 AbstractCegarLoop]: Abstraction has 6136 states and 8577 transitions. [2020-12-22 09:37:46,485 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:37:46,485 INFO L276 IsEmpty]: Start isEmpty. Operand 6136 states and 8577 transitions. [2020-12-22 09:37:46,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:37:46,487 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:37:46,488 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] [2020-12-22 09:37:46,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-22 09:37:46,702 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:37:46,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:37:46,703 INFO L82 PathProgramCache]: Analyzing trace with hash -1910012548, now seen corresponding path program 1 times [2020-12-22 09:37:46,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:37:46,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319104340] [2020-12-22 09:37:46,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:37:46,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:47,018 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 09:37:47,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319104340] [2020-12-22 09:37:47,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723986573] [2020-12-22 09:37:47,019 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 09:37:47,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:47,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 09:37:47,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:37:47,323 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:37:47,668 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 09:37:47,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:37:47,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:37:47,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974370590] [2020-12-22 09:37:47,670 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:37:47,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:37:47,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:37:47,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:37:47,671 INFO L87 Difference]: Start difference. First operand 6136 states and 8577 transitions. Second operand 17 states. [2020-12-22 09:37:50,335 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-12-22 09:37:51,119 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2020-12-22 09:37:53,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:37:53,425 INFO L93 Difference]: Finished difference Result 29250 states and 39149 transitions. [2020-12-22 09:37:53,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 09:37:53,426 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 66 [2020-12-22 09:37:53,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:37:53,506 INFO L225 Difference]: With dead ends: 29250 [2020-12-22 09:37:53,506 INFO L226 Difference]: Without dead ends: 24643 [2020-12-22 09:37:53,527 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=578, Invalid=1678, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 09:37:53,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24643 states. [2020-12-22 09:37:55,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24643 to 11635. [2020-12-22 09:37:55,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11635 states. [2020-12-22 09:37:55,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11635 states to 11635 states and 15704 transitions. [2020-12-22 09:37:55,156 INFO L78 Accepts]: Start accepts. Automaton has 11635 states and 15704 transitions. Word has length 66 [2020-12-22 09:37:55,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:37:55,157 INFO L481 AbstractCegarLoop]: Abstraction has 11635 states and 15704 transitions. [2020-12-22 09:37:55,157 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:37:55,157 INFO L276 IsEmpty]: Start isEmpty. Operand 11635 states and 15704 transitions. [2020-12-22 09:37:55,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:37:55,159 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:37:55,159 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] [2020-12-22 09:37:55,372 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 09:37:55,373 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:37:55,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:37:55,373 INFO L82 PathProgramCache]: Analyzing trace with hash 616171932, now seen corresponding path program 1 times [2020-12-22 09:37:55,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:37:55,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130687631] [2020-12-22 09:37:55,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:37:55,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:55,637 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 09:37:55,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130687631] [2020-12-22 09:37:55,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079975918] [2020-12-22 09:37:55,638 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 09:37:55,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:55,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 09:37:55,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:37:55,999 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:37:56,419 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 09:37:56,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:37:56,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:37:56,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848713455] [2020-12-22 09:37:56,421 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:37:56,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:37:56,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:37:56,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:37:56,426 INFO L87 Difference]: Start difference. First operand 11635 states and 15704 transitions. Second operand 17 states. [2020-12-22 09:38:01,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:38:01,412 INFO L93 Difference]: Finished difference Result 54429 states and 71040 transitions. [2020-12-22 09:38:01,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 09:38:01,413 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 66 [2020-12-22 09:38:01,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:38:01,539 INFO L225 Difference]: With dead ends: 54429 [2020-12-22 09:38:01,539 INFO L226 Difference]: Without dead ends: 44323 [2020-12-22 09:38:01,564 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=312, Invalid=948, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 09:38:01,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44323 states. [2020-12-22 09:38:04,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44323 to 29071. [2020-12-22 09:38:04,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29071 states. [2020-12-22 09:38:04,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29071 states to 29071 states and 38132 transitions. [2020-12-22 09:38:04,551 INFO L78 Accepts]: Start accepts. Automaton has 29071 states and 38132 transitions. Word has length 66 [2020-12-22 09:38:04,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:38:04,551 INFO L481 AbstractCegarLoop]: Abstraction has 29071 states and 38132 transitions. [2020-12-22 09:38:04,551 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:38:04,552 INFO L276 IsEmpty]: Start isEmpty. Operand 29071 states and 38132 transitions. [2020-12-22 09:38:04,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:38:04,557 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:38:04,558 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] [2020-12-22 09:38:04,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 09:38:04,769 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:38:04,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:38:04,771 INFO L82 PathProgramCache]: Analyzing trace with hash -434236462, now seen corresponding path program 1 times [2020-12-22 09:38:04,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:38:04,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326695600] [2020-12-22 09:38:04,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:38:04,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:38:04,862 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 09:38:04,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326695600] [2020-12-22 09:38:04,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:38:04,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:38:04,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615461483] [2020-12-22 09:38:04,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:38:04,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:38:04,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:38:04,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:38:04,868 INFO L87 Difference]: Start difference. First operand 29071 states and 38132 transitions. Second operand 3 states. [2020-12-22 09:38:05,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:38:05,999 INFO L93 Difference]: Finished difference Result 41067 states and 53662 transitions. [2020-12-22 09:38:06,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:38:06,000 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 09:38:06,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:38:06,046 INFO L225 Difference]: With dead ends: 41067 [2020-12-22 09:38:06,046 INFO L226 Difference]: Without dead ends: 13525 [2020-12-22 09:38:06,079 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:38:06,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13525 states. [2020-12-22 09:38:07,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13525 to 12473. [2020-12-22 09:38:07,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12473 states. [2020-12-22 09:38:07,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12473 states to 12473 states and 16421 transitions. [2020-12-22 09:38:07,371 INFO L78 Accepts]: Start accepts. Automaton has 12473 states and 16421 transitions. Word has length 66 [2020-12-22 09:38:07,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:38:07,371 INFO L481 AbstractCegarLoop]: Abstraction has 12473 states and 16421 transitions. [2020-12-22 09:38:07,372 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:38:07,372 INFO L276 IsEmpty]: Start isEmpty. Operand 12473 states and 16421 transitions. [2020-12-22 09:38:07,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:38:07,373 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:38:07,373 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] [2020-12-22 09:38:07,374 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 09:38:07,374 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:38:07,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:38:07,374 INFO L82 PathProgramCache]: Analyzing trace with hash 1433407838, now seen corresponding path program 1 times [2020-12-22 09:38:07,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:38:07,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453427605] [2020-12-22 09:38:07,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:38:07,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:38:07,455 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 09:38:07,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453427605] [2020-12-22 09:38:07,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:38:07,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:38:07,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757430458] [2020-12-22 09:38:07,456 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:38:07,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:38:07,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:38:07,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:38:07,457 INFO L87 Difference]: Start difference. First operand 12473 states and 16421 transitions. Second operand 6 states. [2020-12-22 09:38:08,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:38:08,887 INFO L93 Difference]: Finished difference Result 21538 states and 28068 transitions. [2020-12-22 09:38:08,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:38:08,887 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-12-22 09:38:08,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:38:08,908 INFO L225 Difference]: With dead ends: 21538 [2020-12-22 09:38:08,908 INFO L226 Difference]: Without dead ends: 10671 [2020-12-22 09:38:08,923 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 09:38:08,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10671 states. [2020-12-22 09:38:09,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10671 to 10671. [2020-12-22 09:38:09,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10671 states. [2020-12-22 09:38:09,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10671 states to 10671 states and 13899 transitions. [2020-12-22 09:38:09,931 INFO L78 Accepts]: Start accepts. Automaton has 10671 states and 13899 transitions. Word has length 66 [2020-12-22 09:38:09,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:38:09,931 INFO L481 AbstractCegarLoop]: Abstraction has 10671 states and 13899 transitions. [2020-12-22 09:38:09,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:38:09,932 INFO L276 IsEmpty]: Start isEmpty. Operand 10671 states and 13899 transitions. [2020-12-22 09:38:09,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:38:09,934 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:38:09,934 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] [2020-12-22 09:38:09,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 09:38:09,934 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:38:09,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:38:09,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1275703454, now seen corresponding path program 1 times [2020-12-22 09:38:09,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:38:09,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561463917] [2020-12-22 09:38:09,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:38:09,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:38:10,019 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 09:38:10,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561463917] [2020-12-22 09:38:10,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:38:10,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:38:10,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919836470] [2020-12-22 09:38:10,021 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:38:10,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:38:10,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:38:10,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:38:10,022 INFO L87 Difference]: Start difference. First operand 10671 states and 13899 transitions. Second operand 6 states. [2020-12-22 09:38:10,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:38:10,775 INFO L93 Difference]: Finished difference Result 17448 states and 22435 transitions. [2020-12-22 09:38:10,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:38:10,775 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-12-22 09:38:10,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:38:10,787 INFO L225 Difference]: With dead ends: 17448 [2020-12-22 09:38:10,787 INFO L226 Difference]: Without dead ends: 8419 [2020-12-22 09:38:10,794 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 09:38:10,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8419 states. [2020-12-22 09:38:11,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8419 to 8419. [2020-12-22 09:38:11,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8419 states. [2020-12-22 09:38:11,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8419 states to 8419 states and 10931 transitions. [2020-12-22 09:38:11,575 INFO L78 Accepts]: Start accepts. Automaton has 8419 states and 10931 transitions. Word has length 66 [2020-12-22 09:38:11,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:38:11,575 INFO L481 AbstractCegarLoop]: Abstraction has 8419 states and 10931 transitions. [2020-12-22 09:38:11,576 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:38:11,576 INFO L276 IsEmpty]: Start isEmpty. Operand 8419 states and 10931 transitions. [2020-12-22 09:38:11,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:38:11,577 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:38:11,577 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] [2020-12-22 09:38:11,577 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 09:38:11,577 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:38:11,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:38:11,578 INFO L82 PathProgramCache]: Analyzing trace with hash -1486365826, now seen corresponding path program 1 times [2020-12-22 09:38:11,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:38:11,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364223308] [2020-12-22 09:38:11,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:38:11,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:38:11,652 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 09:38:11,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364223308] [2020-12-22 09:38:11,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:38:11,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:38:11,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651365776] [2020-12-22 09:38:11,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:38:11,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:38:11,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:38:11,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:38:11,654 INFO L87 Difference]: Start difference. First operand 8419 states and 10931 transitions. Second operand 6 states. [2020-12-22 09:38:12,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:38:12,444 INFO L93 Difference]: Finished difference Result 13769 states and 17588 transitions. [2020-12-22 09:38:12,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:38:12,449 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-12-22 09:38:12,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:38:12,459 INFO L225 Difference]: With dead ends: 13769 [2020-12-22 09:38:12,459 INFO L226 Difference]: Without dead ends: 6915 [2020-12-22 09:38:12,466 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 09:38:12,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6915 states. [2020-12-22 09:38:13,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6915 to 6915. [2020-12-22 09:38:13,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6915 states. [2020-12-22 09:38:13,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6915 states to 6915 states and 9025 transitions. [2020-12-22 09:38:13,093 INFO L78 Accepts]: Start accepts. Automaton has 6915 states and 9025 transitions. Word has length 66 [2020-12-22 09:38:13,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:38:13,093 INFO L481 AbstractCegarLoop]: Abstraction has 6915 states and 9025 transitions. [2020-12-22 09:38:13,093 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:38:13,093 INFO L276 IsEmpty]: Start isEmpty. Operand 6915 states and 9025 transitions. [2020-12-22 09:38:13,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:38:13,095 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:38:13,095 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 09:38:13,096 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 09:38:13,096 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:38:13,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:38:13,096 INFO L82 PathProgramCache]: Analyzing trace with hash -791645332, now seen corresponding path program 1 times [2020-12-22 09:38:13,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:38:13,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450105647] [2020-12-22 09:38:13,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:38:13,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:38:13,650 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 09:38:13,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450105647] [2020-12-22 09:38:13,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696965167] [2020-12-22 09:38:13,652 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 09:38:13,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:38:13,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 09:38:13,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:38:14,607 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:38:14,624 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:38:14,625 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:38:14,630 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:38:14,932 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 28 [2020-12-22 09:38:15,196 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 09:38:15,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:38:15,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 26 [2020-12-22 09:38:15,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307681831] [2020-12-22 09:38:15,197 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-22 09:38:15,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:38:15,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-22 09:38:15,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2020-12-22 09:38:15,199 INFO L87 Difference]: Start difference. First operand 6915 states and 9025 transitions. Second operand 26 states. [2020-12-22 09:38:16,110 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 32 [2020-12-22 09:38:16,321 WARN L197 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2020-12-22 09:38:16,646 WARN L197 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 52 [2020-12-22 09:38:16,947 WARN L197 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2020-12-22 09:38:17,232 WARN L197 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2020-12-22 09:38:17,519 WARN L197 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2020-12-22 09:38:17,823 WARN L197 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2020-12-22 09:38:18,211 WARN L197 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 62 [2020-12-22 09:38:18,593 WARN L197 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2020-12-22 09:38:18,866 WARN L197 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2020-12-22 09:38:19,057 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-12-22 09:38:19,287 WARN L197 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 45 [2020-12-22 09:38:19,934 WARN L197 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2020-12-22 09:38:20,457 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2020-12-22 09:38:20,702 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2020-12-22 09:38:21,086 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2020-12-22 09:38:21,500 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-12-22 09:38:21,862 WARN L197 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2020-12-22 09:38:22,056 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2020-12-22 09:38:22,234 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2020-12-22 09:38:22,579 WARN L197 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2020-12-22 09:38:23,014 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2020-12-22 09:38:23,441 WARN L197 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2020-12-22 09:38:23,600 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2020-12-22 09:38:23,961 WARN L197 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2020-12-22 09:38:24,358 WARN L197 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2020-12-22 09:38:24,637 WARN L197 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 45 [2020-12-22 09:38:25,006 WARN L197 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2020-12-22 09:38:25,273 WARN L197 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2020-12-22 09:38:25,541 WARN L197 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43 [2020-12-22 09:38:25,864 WARN L197 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 35 [2020-12-22 09:38:26,072 WARN L197 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2020-12-22 09:38:26,574 WARN L197 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 35 [2020-12-22 09:38:26,960 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 37 [2020-12-22 09:38:28,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:38:28,557 INFO L93 Difference]: Finished difference Result 13221 states and 16860 transitions. [2020-12-22 09:38:28,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-12-22 09:38:28,558 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 67 [2020-12-22 09:38:28,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:38:28,569 INFO L225 Difference]: With dead ends: 13221 [2020-12-22 09:38:28,569 INFO L226 Difference]: Without dead ends: 10406 [2020-12-22 09:38:28,575 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2087 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=1298, Invalid=6358, Unknown=0, NotChecked=0, Total=7656 [2020-12-22 09:38:28,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10406 states. [2020-12-22 09:38:29,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10406 to 6157. [2020-12-22 09:38:29,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6157 states. [2020-12-22 09:38:29,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6157 states to 6157 states and 8140 transitions. [2020-12-22 09:38:29,154 INFO L78 Accepts]: Start accepts. Automaton has 6157 states and 8140 transitions. Word has length 67 [2020-12-22 09:38:29,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:38:29,154 INFO L481 AbstractCegarLoop]: Abstraction has 6157 states and 8140 transitions. [2020-12-22 09:38:29,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-22 09:38:29,154 INFO L276 IsEmpty]: Start isEmpty. Operand 6157 states and 8140 transitions. [2020-12-22 09:38:29,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:38:29,155 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:38:29,155 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 09:38:29,361 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-22 09:38:29,362 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:38:29,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:38:29,362 INFO L82 PathProgramCache]: Analyzing trace with hash 1641009586, now seen corresponding path program 1 times [2020-12-22 09:38:29,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:38:29,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335520175] [2020-12-22 09:38:29,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:38:29,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:38:29,848 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 09:38:29,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335520175] [2020-12-22 09:38:29,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941072431] [2020-12-22 09:38:29,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:38:30,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:38:30,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 09:38:30,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:38:30,267 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:38:30,884 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 09:38:30,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:38:30,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2020-12-22 09:38:30,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139498647] [2020-12-22 09:38:30,885 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 09:38:30,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:38:30,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 09:38:30,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2020-12-22 09:38:30,886 INFO L87 Difference]: Start difference. First operand 6157 states and 8140 transitions. Second operand 22 states. [2020-12-22 09:38:31,246 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 21 [2020-12-22 09:38:31,429 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 40 [2020-12-22 09:38:31,621 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 40 [2020-12-22 09:38:31,777 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2020-12-22 09:38:32,585 WARN L197 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 41 [2020-12-22 09:38:32,862 WARN L197 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2020-12-22 09:38:33,051 WARN L197 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 30 [2020-12-22 09:38:33,292 WARN L197 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 46 [2020-12-22 09:38:34,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:38:34,102 INFO L93 Difference]: Finished difference Result 9399 states and 12233 transitions. [2020-12-22 09:38:34,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 09:38:34,103 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 67 [2020-12-22 09:38:34,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:38:34,110 INFO L225 Difference]: With dead ends: 9399 [2020-12-22 09:38:34,110 INFO L226 Difference]: Without dead ends: 7213 [2020-12-22 09:38:34,113 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=275, Invalid=985, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 09:38:34,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7213 states. [2020-12-22 09:38:34,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7213 to 5165. [2020-12-22 09:38:34,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5165 states. [2020-12-22 09:38:34,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5165 states to 5165 states and 6914 transitions. [2020-12-22 09:38:34,540 INFO L78 Accepts]: Start accepts. Automaton has 5165 states and 6914 transitions. Word has length 67 [2020-12-22 09:38:34,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:38:34,540 INFO L481 AbstractCegarLoop]: Abstraction has 5165 states and 6914 transitions. [2020-12-22 09:38:34,541 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 09:38:34,541 INFO L276 IsEmpty]: Start isEmpty. Operand 5165 states and 6914 transitions. [2020-12-22 09:38:34,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 09:38:34,541 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:38:34,542 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, 1] [2020-12-22 09:38:34,756 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:38:34,757 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:38:34,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:38:34,758 INFO L82 PathProgramCache]: Analyzing trace with hash -2141886399, now seen corresponding path program 1 times [2020-12-22 09:38:34,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:38:34,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940550700] [2020-12-22 09:38:34,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:38:34,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:38:35,280 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 09:38:35,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940550700] [2020-12-22 09:38:35,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258594135] [2020-12-22 09:38:35,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:38:35,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:38:35,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-22 09:38:35,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:38:36,883 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 28 [2020-12-22 09:38:37,404 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 09:38:37,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:38:37,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 32 [2020-12-22 09:38:37,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546494715] [2020-12-22 09:38:37,406 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-22 09:38:37,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:38:37,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-22 09:38:37,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=794, Unknown=0, NotChecked=0, Total=992 [2020-12-22 09:38:37,407 INFO L87 Difference]: Start difference. First operand 5165 states and 6914 transitions. Second operand 32 states. [2020-12-22 09:38:38,704 WARN L197 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-12-22 09:38:38,858 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2020-12-22 09:38:40,427 WARN L197 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2020-12-22 09:38:40,788 WARN L197 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2020-12-22 09:38:42,763 WARN L197 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2020-12-22 09:38:43,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:38:43,547 INFO L93 Difference]: Finished difference Result 8559 states and 11215 transitions. [2020-12-22 09:38:43,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-12-22 09:38:43,548 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 68 [2020-12-22 09:38:43,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:38:43,554 INFO L225 Difference]: With dead ends: 8559 [2020-12-22 09:38:43,554 INFO L226 Difference]: Without dead ends: 6639 [2020-12-22 09:38:43,558 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1435 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=1070, Invalid=4042, Unknown=0, NotChecked=0, Total=5112 [2020-12-22 09:38:43,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6639 states. [2020-12-22 09:38:43,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6639 to 4215. [2020-12-22 09:38:43,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4215 states. [2020-12-22 09:38:43,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4215 states to 4215 states and 5750 transitions. [2020-12-22 09:38:43,906 INFO L78 Accepts]: Start accepts. Automaton has 4215 states and 5750 transitions. Word has length 68 [2020-12-22 09:38:43,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:38:43,906 INFO L481 AbstractCegarLoop]: Abstraction has 4215 states and 5750 transitions. [2020-12-22 09:38:43,906 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-22 09:38:43,906 INFO L276 IsEmpty]: Start isEmpty. Operand 4215 states and 5750 transitions. [2020-12-22 09:38:43,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 09:38:43,908 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:38:43,908 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:38:44,121 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-22 09:38:44,122 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:38:44,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:38:44,123 INFO L82 PathProgramCache]: Analyzing trace with hash -1669467565, now seen corresponding path program 1 times [2020-12-22 09:38:44,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:38:44,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723015681] [2020-12-22 09:38:44,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:38:44,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:38:44,195 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:38:44,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723015681] [2020-12-22 09:38:44,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:38:44,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:38:44,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453660988] [2020-12-22 09:38:44,197 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:38:44,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:38:44,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:38:44,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:38:44,197 INFO L87 Difference]: Start difference. First operand 4215 states and 5750 transitions. Second operand 3 states. [2020-12-22 09:38:51,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:38:51,292 INFO L93 Difference]: Finished difference Result 7221 states and 10581 transitions. [2020-12-22 09:38:51,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:38:51,293 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 82 [2020-12-22 09:38:51,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:38:51,301 INFO L225 Difference]: With dead ends: 7221 [2020-12-22 09:38:51,301 INFO L226 Difference]: Without dead ends: 5717 [2020-12-22 09:38:51,304 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:38:51,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5717 states. [2020-12-22 09:38:51,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5717 to 5717. [2020-12-22 09:38:51,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5717 states. [2020-12-22 09:38:51,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5717 states to 5717 states and 7589 transitions. [2020-12-22 09:38:51,736 INFO L78 Accepts]: Start accepts. Automaton has 5717 states and 7589 transitions. Word has length 82 [2020-12-22 09:38:51,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:38:51,736 INFO L481 AbstractCegarLoop]: Abstraction has 5717 states and 7589 transitions. [2020-12-22 09:38:51,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:38:51,736 INFO L276 IsEmpty]: Start isEmpty. Operand 5717 states and 7589 transitions. [2020-12-22 09:38:51,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-22 09:38:51,737 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:38:51,737 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:38:51,737 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-12-22 09:38:51,737 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:38:51,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:38:51,738 INFO L82 PathProgramCache]: Analyzing trace with hash -576269074, now seen corresponding path program 1 times [2020-12-22 09:38:51,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:38:51,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205716667] [2020-12-22 09:38:51,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:38:51,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:38:51,792 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:38:51,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205716667] [2020-12-22 09:38:51,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:38:51,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:38:51,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165242352] [2020-12-22 09:38:51,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:38:51,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:38:51,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:38:51,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:38:51,794 INFO L87 Difference]: Start difference. First operand 5717 states and 7589 transitions. Second operand 3 states. [2020-12-22 09:38:59,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:38:59,363 INFO L93 Difference]: Finished difference Result 11729 states and 16099 transitions. [2020-12-22 09:38:59,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:38:59,364 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 84 [2020-12-22 09:38:59,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:38:59,375 INFO L225 Difference]: With dead ends: 11729 [2020-12-22 09:38:59,376 INFO L226 Difference]: Without dead ends: 8723 [2020-12-22 09:38:59,380 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:38:59,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8723 states. [2020-12-22 09:38:59,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8723 to 8721. [2020-12-22 09:38:59,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8721 states. [2020-12-22 09:38:59,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8721 states to 8721 states and 11117 transitions. [2020-12-22 09:38:59,778 INFO L78 Accepts]: Start accepts. Automaton has 8721 states and 11117 transitions. Word has length 84 [2020-12-22 09:38:59,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:38:59,778 INFO L481 AbstractCegarLoop]: Abstraction has 8721 states and 11117 transitions. [2020-12-22 09:38:59,778 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:38:59,778 INFO L276 IsEmpty]: Start isEmpty. Operand 8721 states and 11117 transitions. [2020-12-22 09:38:59,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-12-22 09:38:59,780 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:38:59,780 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:38:59,780 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-12-22 09:38:59,780 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:38:59,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:38:59,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1538014726, now seen corresponding path program 1 times [2020-12-22 09:38:59,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:38:59,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705558281] [2020-12-22 09:38:59,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:38:59,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:39:00,108 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 15 [2020-12-22 09:39:00,200 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 22 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:39:00,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705558281] [2020-12-22 09:39:00,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133437494] [2020-12-22 09:39:00,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:39:00,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:39:00,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-22 09:39:00,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:39:01,093 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 09:39:01,573 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 42 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:39:01,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:39:01,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 22 [2020-12-22 09:39:01,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106751417] [2020-12-22 09:39:01,574 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 09:39:01,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:39:01,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 09:39:01,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2020-12-22 09:39:01,575 INFO L87 Difference]: Start difference. First operand 8721 states and 11117 transitions. Second operand 23 states. [2020-12-22 09:39:02,004 WARN L197 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 63 [2020-12-22 09:39:02,751 WARN L197 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 59 [2020-12-22 09:39:03,211 WARN L197 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 61 [2020-12-22 09:39:03,650 WARN L197 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 66 [2020-12-22 09:39:04,077 WARN L197 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 63 [2020-12-22 09:39:04,700 WARN L197 SmtUtils]: Spent 561.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 81 [2020-12-22 09:39:05,340 WARN L197 SmtUtils]: Spent 552.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 81 [2020-12-22 09:39:06,199 WARN L197 SmtUtils]: Spent 566.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 81 [2020-12-22 09:39:06,944 WARN L197 SmtUtils]: Spent 664.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 86 [2020-12-22 09:39:07,843 WARN L197 SmtUtils]: Spent 653.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 91 [2020-12-22 09:39:08,583 WARN L197 SmtUtils]: Spent 667.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 88 [2020-12-22 09:39:09,250 WARN L197 SmtUtils]: Spent 618.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 86 [2020-12-22 09:39:09,949 WARN L197 SmtUtils]: Spent 627.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 86 [2020-12-22 09:39:10,576 WARN L197 SmtUtils]: Spent 571.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 83 [2020-12-22 09:39:11,500 WARN L197 SmtUtils]: Spent 836.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 91 [2020-12-22 09:39:12,608 WARN L197 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 116 DAG size of output: 99 [2020-12-22 09:39:13,598 WARN L197 SmtUtils]: Spent 910.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 99 [2020-12-22 09:39:14,687 WARN L197 SmtUtils]: Spent 966.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 99 [2020-12-22 09:39:16,107 WARN L197 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 116 DAG size of output: 99 [2020-12-22 09:39:16,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:39:16,751 INFO L93 Difference]: Finished difference Result 11095 states and 14104 transitions. [2020-12-22 09:39:16,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 09:39:16,752 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 110 [2020-12-22 09:39:16,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:39:16,761 INFO L225 Difference]: With dead ends: 11095 [2020-12-22 09:39:16,762 INFO L226 Difference]: Without dead ends: 8939 [2020-12-22 09:39:16,765 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=471, Invalid=1599, Unknown=0, NotChecked=0, Total=2070 [2020-12-22 09:39:16,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8939 states. [2020-12-22 09:39:17,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8939 to 8721. [2020-12-22 09:39:17,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8721 states. [2020-12-22 09:39:17,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8721 states to 8721 states and 11065 transitions. [2020-12-22 09:39:17,303 INFO L78 Accepts]: Start accepts. Automaton has 8721 states and 11065 transitions. Word has length 110 [2020-12-22 09:39:17,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:39:17,304 INFO L481 AbstractCegarLoop]: Abstraction has 8721 states and 11065 transitions. [2020-12-22 09:39:17,304 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 09:39:17,304 INFO L276 IsEmpty]: Start isEmpty. Operand 8721 states and 11065 transitions. [2020-12-22 09:39:17,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-22 09:39:17,305 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:39:17,306 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:39:17,506 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-22 09:39:17,507 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:39:17,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:39:17,507 INFO L82 PathProgramCache]: Analyzing trace with hash -721276639, now seen corresponding path program 1 times [2020-12-22 09:39:17,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:39:17,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713730297] [2020-12-22 09:39:17,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:39:17,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:39:17,962 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 25 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:39:17,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713730297] [2020-12-22 09:39:17,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731789125] [2020-12-22 09:39:17,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:39:18,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:39:18,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-22 09:39:18,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:39:18,664 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 09:39:19,515 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 09:39:19,831 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 34 [2020-12-22 09:39:20,775 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 27 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:39:20,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:39:20,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 19] total 29 [2020-12-22 09:39:20,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159862590] [2020-12-22 09:39:20,776 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-22 09:39:20,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:39:20,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-22 09:39:20,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=725, Unknown=0, NotChecked=0, Total=870 [2020-12-22 09:39:20,777 INFO L87 Difference]: Start difference. First operand 8721 states and 11065 transitions. Second operand 30 states. [2020-12-22 09:39:20,953 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-12-22 09:39:21,424 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-12-22 09:39:21,651 WARN L197 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-12-22 09:39:22,105 WARN L197 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-12-22 09:39:22,352 WARN L197 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2020-12-22 09:39:22,699 WARN L197 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2020-12-22 09:39:22,941 WARN L197 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-12-22 09:39:23,244 WARN L197 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2020-12-22 09:39:23,618 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2020-12-22 09:39:24,060 WARN L197 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2020-12-22 09:39:24,349 WARN L197 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 59 [2020-12-22 09:39:24,618 WARN L197 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2020-12-22 09:39:25,100 WARN L197 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 60 [2020-12-22 09:39:25,817 WARN L197 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2020-12-22 09:39:26,404 WARN L197 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2020-12-22 09:39:26,797 WARN L197 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2020-12-22 09:39:27,337 WARN L197 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2020-12-22 09:39:27,770 WARN L197 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2020-12-22 09:39:27,953 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 29 [2020-12-22 09:39:28,191 WARN L197 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2020-12-22 09:39:28,444 WARN L197 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2020-12-22 09:39:28,744 WARN L197 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2020-12-22 09:39:29,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:39:29,267 INFO L93 Difference]: Finished difference Result 10813 states and 13656 transitions. [2020-12-22 09:39:29,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-22 09:39:29,269 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 111 [2020-12-22 09:39:29,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:39:29,279 INFO L225 Difference]: With dead ends: 10813 [2020-12-22 09:39:29,279 INFO L226 Difference]: Without dead ends: 9295 [2020-12-22 09:39:29,284 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 874 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=614, Invalid=2926, Unknown=0, NotChecked=0, Total=3540 [2020-12-22 09:39:29,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9295 states. [2020-12-22 09:39:29,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9295 to 8721. [2020-12-22 09:39:29,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8721 states. [2020-12-22 09:39:29,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8721 states to 8721 states and 11039 transitions. [2020-12-22 09:39:29,931 INFO L78 Accepts]: Start accepts. Automaton has 8721 states and 11039 transitions. Word has length 111 [2020-12-22 09:39:29,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:39:29,932 INFO L481 AbstractCegarLoop]: Abstraction has 8721 states and 11039 transitions. [2020-12-22 09:39:29,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-22 09:39:29,932 INFO L276 IsEmpty]: Start isEmpty. Operand 8721 states and 11039 transitions. [2020-12-22 09:39:29,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 09:39:29,935 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:39:29,935 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:39:30,148 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-22 09:39:30,149 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:39:30,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:39:30,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1699429479, now seen corresponding path program 1 times [2020-12-22 09:39:30,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:39:30,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141384408] [2020-12-22 09:39:30,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:39:30,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:39:31,804 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 16 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:39:31,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141384408] [2020-12-22 09:39:31,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870228603] [2020-12-22 09:39:31,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:39:31,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:39:31,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-22 09:39:31,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:39:32,783 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 26 [2020-12-22 09:39:32,796 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:39:33,176 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:39:33,757 WARN L197 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 46 [2020-12-22 09:39:33,772 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:39:34,070 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 46 [2020-12-22 09:39:34,082 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:39:34,598 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-22 09:39:34,619 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:39:34,639 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:39:44,598 WARN L197 SmtUtils]: Spent 4.54 s on a formula simplification. DAG size of input: 346 DAG size of output: 45 [2020-12-22 09:39:46,081 WARN L197 SmtUtils]: Spent 524.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-12-22 09:39:48,830 WARN L197 SmtUtils]: Spent 1.25 s on a formula simplification that was a NOOP. DAG size: 44 [2020-12-22 09:39:49,033 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 25 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:39:49,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:39:49,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 18] total 39 [2020-12-22 09:39:49,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950389766] [2020-12-22 09:39:49,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-22 09:39:49,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:39:49,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-22 09:39:49,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1383, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 09:39:49,035 INFO L87 Difference]: Start difference. First operand 8721 states and 11039 transitions. Second operand 39 states. [2020-12-22 09:39:49,493 WARN L197 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2020-12-22 09:39:51,081 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 26 [2020-12-22 09:39:51,396 WARN L197 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2020-12-22 09:39:51,839 WARN L197 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2020-12-22 09:39:52,265 WARN L197 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2020-12-22 09:39:52,613 WARN L197 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2020-12-22 09:39:52,960 WARN L197 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2020-12-22 09:39:53,503 WARN L197 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-12-22 09:39:54,021 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-12-22 09:39:54,668 WARN L197 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 59 [2020-12-22 09:39:55,462 WARN L197 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 51 [2020-12-22 09:39:56,172 WARN L197 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 54 [2020-12-22 09:39:57,497 WARN L197 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 65 [2020-12-22 09:40:01,257 WARN L197 SmtUtils]: Spent 2.07 s on a formula simplification. DAG size of input: 99 DAG size of output: 81 [2020-12-22 09:40:01,627 WARN L197 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 62 [2020-12-22 09:40:06,758 WARN L197 SmtUtils]: Spent 3.21 s on a formula simplification. DAG size of input: 78 DAG size of output: 75 [2020-12-22 09:40:11,159 WARN L197 SmtUtils]: Spent 2.86 s on a formula simplification. DAG size of input: 93 DAG size of output: 78 [2020-12-22 09:40:11,432 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2020-12-22 09:40:14,392 WARN L197 SmtUtils]: Spent 1.38 s on a formula simplification that was a NOOP. DAG size: 72 [2020-12-22 09:40:19,142 WARN L197 SmtUtils]: Spent 2.58 s on a formula simplification. DAG size of input: 88 DAG size of output: 85 [2020-12-22 09:40:24,117 WARN L197 SmtUtils]: Spent 2.84 s on a formula simplification. DAG size of input: 85 DAG size of output: 82 [2020-12-22 09:40:27,189 WARN L197 SmtUtils]: Spent 977.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-12-22 09:40:29,994 WARN L197 SmtUtils]: Spent 1.03 s on a formula simplification that was a NOOP. DAG size: 58 [2020-12-22 09:40:33,717 WARN L197 SmtUtils]: Spent 983.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-12-22 09:40:33,964 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2020-12-22 09:40:36,967 WARN L197 SmtUtils]: Spent 908.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-12-22 09:40:37,229 WARN L197 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2020-12-22 09:40:37,871 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2020-12-22 09:40:40,231 WARN L197 SmtUtils]: Spent 670.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-12-22 09:40:44,225 WARN L197 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-12-22 09:40:44,594 WARN L197 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-12-22 09:40:48,387 WARN L197 SmtUtils]: Spent 1.21 s on a formula simplification that was a NOOP. DAG size: 63 [2020-12-22 09:40:53,050 WARN L197 SmtUtils]: Spent 1.27 s on a formula simplification that was a NOOP. DAG size: 75 [2020-12-22 09:40:55,302 WARN L197 SmtUtils]: Spent 315.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-12-22 09:40:57,459 WARN L197 SmtUtils]: Spent 344.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-12-22 09:41:01,984 WARN L197 SmtUtils]: Spent 1.20 s on a formula simplification that was a NOOP. DAG size: 58