/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.6.1.ufo.BOUNDED-12.pals+Problem12_label02.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 10:00:28,386 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 10:00:28,389 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 10:00:28,435 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 10:00:28,436 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 10:00:28,440 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 10:00:28,444 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 10:00:28,451 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 10:00:28,455 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 10:00:28,463 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 10:00:28,464 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 10:00:28,466 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 10:00:28,466 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 10:00:28,469 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 10:00:28,471 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 10:00:28,473 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 10:00:28,474 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 10:00:28,475 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 10:00:28,478 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 10:00:28,480 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 10:00:28,482 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 10:00:28,484 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 10:00:28,486 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 10:00:28,487 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 10:00:28,510 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 10:00:28,521 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 10:00:28,522 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 10:00:28,523 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 10:00:28,524 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 10:00:28,526 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 10:00:28,526 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 10:00:28,527 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 10:00:28,527 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 10:00:28,528 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 10:00:28,529 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 10:00:28,530 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 10:00:28,531 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 10:00:28,589 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 10:00:28,590 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 10:00:28,594 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 10:00:28,594 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 10:00:28,595 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 10:00:28,595 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 10:00:28,596 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 10:00:28,596 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 10:00:28,596 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 10:00:28,597 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 10:00:28,598 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 10:00:28,598 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 10:00:28,598 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 10:00:28,598 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 10:00:28,599 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 10:00:28,599 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 10:00:28,599 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 10:00:28,599 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 10:00:28,600 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 10:00:28,600 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 10:00:28,600 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 10:00:28,601 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 10:00:28,601 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 10:00:28,601 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 10:00:28,601 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 10:00:28,601 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 10:00:29,082 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 10:00:29,122 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 10:00:29,126 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 10:00:29,127 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 10:00:29,128 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 10:00:29,129 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.6.1.ufo.BOUNDED-12.pals+Problem12_label02.c [2020-12-22 10:00:29,235 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/66a0ff68b/a4c013300de04148b91752d66b0710b7/FLAG6f3356f64 [2020-12-22 10:00:30,267 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 10:00:30,268 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.6.1.ufo.BOUNDED-12.pals+Problem12_label02.c [2020-12-22 10:00:30,315 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/66a0ff68b/a4c013300de04148b91752d66b0710b7/FLAG6f3356f64 [2020-12-22 10:00:30,705 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/66a0ff68b/a4c013300de04148b91752d66b0710b7 [2020-12-22 10:00:30,708 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 10:00:30,710 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 10:00:30,712 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 10:00:30,713 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 10:00:30,717 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 10:00:30,718 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:00:30" (1/1) ... [2020-12-22 10:00:30,720 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@177141c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:00:30, skipping insertion in model container [2020-12-22 10:00:30,720 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:00:30" (1/1) ... [2020-12-22 10:00:30,730 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 10:00:30,943 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 10:00:31,363 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.6.1.ufo.BOUNDED-12.pals+Problem12_label02.c[15623,15636] [2020-12-22 10:00:31,468 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.6.1.ufo.BOUNDED-12.pals+Problem12_label02.c[22670,22683] [2020-12-22 10:00:32,471 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:00:32,489 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 10:00:32,611 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.6.1.ufo.BOUNDED-12.pals+Problem12_label02.c[15623,15636] [2020-12-22 10:00:32,625 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.6.1.ufo.BOUNDED-12.pals+Problem12_label02.c[22670,22683] [2020-12-22 10:00:33,239 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:00:33,281 INFO L208 MainTranslator]: Completed translation [2020-12-22 10:00:33,281 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:00:33 WrapperNode [2020-12-22 10:00:33,282 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 10:00:33,285 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 10:00:33,285 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 10:00:33,285 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 10:00:33,294 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:00:33" (1/1) ... [2020-12-22 10:00:33,361 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:00:33" (1/1) ... [2020-12-22 10:00:33,827 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 10:00:33,831 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 10:00:33,831 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 10:00:33,832 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 10:00:33,914 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:00:33" (1/1) ... [2020-12-22 10:00:33,914 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:00:33" (1/1) ... [2020-12-22 10:00:33,976 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:00:33" (1/1) ... [2020-12-22 10:00:33,976 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:00:33" (1/1) ... [2020-12-22 10:00:34,260 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:00:33" (1/1) ... [2020-12-22 10:00:34,304 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:00:33" (1/1) ... [2020-12-22 10:00:34,403 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:00:33" (1/1) ... [2020-12-22 10:00:34,513 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 10:00:34,515 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 10:00:34,515 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 10:00:34,515 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 10:00:34,517 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:00:33" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 10:00:34,629 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 10:00:34,629 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 10:00:34,630 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 10:00:34,630 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 10:00:40,629 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 10:00:40,630 INFO L299 CfgBuilder]: Removed 38 assume(true) statements. [2020-12-22 10:00:40,634 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:00:40 BoogieIcfgContainer [2020-12-22 10:00:40,635 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 10:00:40,637 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 10:00:40,637 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 10:00:40,641 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 10:00:40,641 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 10:00:30" (1/3) ... [2020-12-22 10:00:40,642 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b71305e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:00:40, skipping insertion in model container [2020-12-22 10:00:40,642 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:00:33" (2/3) ... [2020-12-22 10:00:40,643 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b71305e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:00:40, skipping insertion in model container [2020-12-22 10:00:40,643 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:00:40" (3/3) ... [2020-12-22 10:00:40,644 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.6.1.ufo.BOUNDED-12.pals+Problem12_label02.c [2020-12-22 10:00:40,652 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 10:00:40,659 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 10:00:40,680 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 10:00:40,715 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 10:00:40,715 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 10:00:40,716 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 10:00:40,716 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 10:00:40,716 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 10:00:40,716 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 10:00:40,716 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 10:00:40,716 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 10:00:40,752 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states. [2020-12-22 10:00:40,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-22 10:00:40,763 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:00:40,764 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] [2020-12-22 10:00:40,765 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:00:40,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:00:40,772 INFO L82 PathProgramCache]: Analyzing trace with hash 340623278, now seen corresponding path program 1 times [2020-12-22 10:00:40,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:00:40,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475981227] [2020-12-22 10:00:40,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:00:40,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:00:41,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:00:41,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475981227] [2020-12-22 10:00:41,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:00:41,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:00:41,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615094006] [2020-12-22 10:00:41,123 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 10:00:41,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:00:41,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 10:00:41,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 10:00:41,150 INFO L87 Difference]: Start difference. First operand 926 states. Second operand 2 states. [2020-12-22 10:00:41,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:00:41,258 INFO L93 Difference]: Finished difference Result 1806 states and 3418 transitions. [2020-12-22 10:00:41,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 10:00:41,261 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 38 [2020-12-22 10:00:41,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:00:41,297 INFO L225 Difference]: With dead ends: 1806 [2020-12-22 10:00:41,297 INFO L226 Difference]: Without dead ends: 860 [2020-12-22 10:00:41,310 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 10:00:41,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860 states. [2020-12-22 10:00:41,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860 to 860. [2020-12-22 10:00:41,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 860 states. [2020-12-22 10:00:41,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 1620 transitions. [2020-12-22 10:00:41,465 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 1620 transitions. Word has length 38 [2020-12-22 10:00:41,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:00:41,466 INFO L481 AbstractCegarLoop]: Abstraction has 860 states and 1620 transitions. [2020-12-22 10:00:41,466 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 10:00:41,466 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 1620 transitions. [2020-12-22 10:00:41,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-22 10:00:41,469 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:00:41,469 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] [2020-12-22 10:00:41,470 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 10:00:41,470 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:00:41,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:00:41,471 INFO L82 PathProgramCache]: Analyzing trace with hash 615382892, now seen corresponding path program 1 times [2020-12-22 10:00:41,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:00:41,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145364374] [2020-12-22 10:00:41,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:00:41,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:00:41,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:00:41,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145364374] [2020-12-22 10:00:41,608 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:00:41,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:00:41,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442892990] [2020-12-22 10:00:41,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 10:00:41,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:00:41,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 10:00:41,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:00:41,612 INFO L87 Difference]: Start difference. First operand 860 states and 1620 transitions. Second operand 5 states. [2020-12-22 10:00:41,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:00:41,800 INFO L93 Difference]: Finished difference Result 924 states and 1719 transitions. [2020-12-22 10:00:41,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 10:00:41,801 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 38 [2020-12-22 10:00:41,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:00:41,807 INFO L225 Difference]: With dead ends: 924 [2020-12-22 10:00:41,808 INFO L226 Difference]: Without dead ends: 860 [2020-12-22 10:00:41,809 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 10:00:41,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860 states. [2020-12-22 10:00:41,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860 to 860. [2020-12-22 10:00:41,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 860 states. [2020-12-22 10:00:41,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 1580 transitions. [2020-12-22 10:00:41,838 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 1580 transitions. Word has length 38 [2020-12-22 10:00:41,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:00:41,838 INFO L481 AbstractCegarLoop]: Abstraction has 860 states and 1580 transitions. [2020-12-22 10:00:41,838 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 10:00:41,838 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 1580 transitions. [2020-12-22 10:00:41,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 10:00:41,841 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:00:41,842 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:00:41,842 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 10:00:41,842 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:00:41,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:00:41,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1423615356, now seen corresponding path program 1 times [2020-12-22 10:00:41,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:00:41,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20866586] [2020-12-22 10:00:41,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:00:41,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:00:42,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:00:42,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20866586] [2020-12-22 10:00:42,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:00:42,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:00:42,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437840819] [2020-12-22 10:00:42,148 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 10:00:42,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:00:42,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 10:00:42,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 10:00:42,154 INFO L87 Difference]: Start difference. First operand 860 states and 1580 transitions. Second operand 4 states. [2020-12-22 10:00:54,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:00:54,179 INFO L93 Difference]: Finished difference Result 3115 states and 5889 transitions. [2020-12-22 10:00:54,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 10:00:54,184 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 63 [2020-12-22 10:00:54,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:00:54,197 INFO L225 Difference]: With dead ends: 3115 [2020-12-22 10:00:54,197 INFO L226 Difference]: Without dead ends: 2362 [2020-12-22 10:00:54,200 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:00:54,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2362 states. [2020-12-22 10:00:54,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2362 to 2362. [2020-12-22 10:00:54,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2362 states. [2020-12-22 10:00:54,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2362 states to 2362 states and 3694 transitions. [2020-12-22 10:00:54,260 INFO L78 Accepts]: Start accepts. Automaton has 2362 states and 3694 transitions. Word has length 63 [2020-12-22 10:00:54,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:00:54,261 INFO L481 AbstractCegarLoop]: Abstraction has 2362 states and 3694 transitions. [2020-12-22 10:00:54,261 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 10:00:54,261 INFO L276 IsEmpty]: Start isEmpty. Operand 2362 states and 3694 transitions. [2020-12-22 10:00:54,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 10:00:54,264 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:00:54,264 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:00:54,265 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 10:00:54,265 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:00:54,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:00:54,265 INFO L82 PathProgramCache]: Analyzing trace with hash -2101054792, now seen corresponding path program 1 times [2020-12-22 10:00:54,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:00:54,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556833313] [2020-12-22 10:00:54,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:00:54,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:00:54,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:00:54,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556833313] [2020-12-22 10:00:54,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:00:54,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:00:54,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691422499] [2020-12-22 10:00:54,417 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:00:54,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:00:54,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:00:54,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:00:54,419 INFO L87 Difference]: Start difference. First operand 2362 states and 3694 transitions. Second operand 3 states. [2020-12-22 10:00:54,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:00:54,471 INFO L93 Difference]: Finished difference Result 2476 states and 3874 transitions. [2020-12-22 10:00:54,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:00:54,472 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2020-12-22 10:00:54,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:00:54,487 INFO L225 Difference]: With dead ends: 2476 [2020-12-22 10:00:54,487 INFO L226 Difference]: Without dead ends: 2416 [2020-12-22 10:00:54,489 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:00:54,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2416 states. [2020-12-22 10:00:54,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2416 to 2414. [2020-12-22 10:00:54,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2414 states. [2020-12-22 10:00:54,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2414 states to 2414 states and 3777 transitions. [2020-12-22 10:00:54,546 INFO L78 Accepts]: Start accepts. Automaton has 2414 states and 3777 transitions. Word has length 77 [2020-12-22 10:00:54,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:00:54,546 INFO L481 AbstractCegarLoop]: Abstraction has 2414 states and 3777 transitions. [2020-12-22 10:00:54,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:00:54,546 INFO L276 IsEmpty]: Start isEmpty. Operand 2414 states and 3777 transitions. [2020-12-22 10:00:54,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 10:00:54,553 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:00:54,553 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:00:54,554 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 10:00:54,554 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:00:54,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:00:54,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1452480302, now seen corresponding path program 1 times [2020-12-22 10:00:54,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:00:54,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763637166] [2020-12-22 10:00:54,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:00:54,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:00:54,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:00:54,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763637166] [2020-12-22 10:00:54,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:00:54,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:00:54,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819821535] [2020-12-22 10:00:54,682 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:00:54,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:00:54,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:00:54,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:00:54,683 INFO L87 Difference]: Start difference. First operand 2414 states and 3777 transitions. Second operand 3 states. [2020-12-22 10:00:54,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:00:54,734 INFO L93 Difference]: Finished difference Result 2626 states and 4113 transitions. [2020-12-22 10:00:54,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:00:54,734 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2020-12-22 10:00:54,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:00:54,748 INFO L225 Difference]: With dead ends: 2626 [2020-12-22 10:00:54,749 INFO L226 Difference]: Without dead ends: 2514 [2020-12-22 10:00:54,751 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:00:54,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2020-12-22 10:00:54,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 2512. [2020-12-22 10:00:54,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2512 states. [2020-12-22 10:00:54,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2512 states to 2512 states and 3932 transitions. [2020-12-22 10:00:54,813 INFO L78 Accepts]: Start accepts. Automaton has 2512 states and 3932 transitions. Word has length 77 [2020-12-22 10:00:54,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:00:54,814 INFO L481 AbstractCegarLoop]: Abstraction has 2512 states and 3932 transitions. [2020-12-22 10:00:54,814 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:00:54,814 INFO L276 IsEmpty]: Start isEmpty. Operand 2512 states and 3932 transitions. [2020-12-22 10:00:54,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 10:00:54,815 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:00:54,816 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:00:54,816 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 10:00:54,816 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:00:54,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:00:54,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1624501596, now seen corresponding path program 1 times [2020-12-22 10:00:54,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:00:54,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521446563] [2020-12-22 10:00:54,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:00:54,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:00:54,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:00:54,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521446563] [2020-12-22 10:00:54,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:00:54,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:00:54,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484784339] [2020-12-22 10:00:54,986 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:00:54,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:00:54,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:00:54,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:00:54,987 INFO L87 Difference]: Start difference. First operand 2512 states and 3932 transitions. Second operand 8 states. [2020-12-22 10:00:55,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:00:55,451 INFO L93 Difference]: Finished difference Result 5032 states and 7928 transitions. [2020-12-22 10:00:55,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 10:00:55,452 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 77 [2020-12-22 10:00:55,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:00:55,483 INFO L225 Difference]: With dead ends: 5032 [2020-12-22 10:00:55,483 INFO L226 Difference]: Without dead ends: 4822 [2020-12-22 10:00:55,490 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:00:55,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4822 states. [2020-12-22 10:00:55,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4822 to 2720. [2020-12-22 10:00:55,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2720 states. [2020-12-22 10:00:55,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2720 states to 2720 states and 4256 transitions. [2020-12-22 10:00:55,626 INFO L78 Accepts]: Start accepts. Automaton has 2720 states and 4256 transitions. Word has length 77 [2020-12-22 10:00:55,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:00:55,628 INFO L481 AbstractCegarLoop]: Abstraction has 2720 states and 4256 transitions. [2020-12-22 10:00:55,628 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:00:55,628 INFO L276 IsEmpty]: Start isEmpty. Operand 2720 states and 4256 transitions. [2020-12-22 10:00:55,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 10:00:55,629 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:00:55,630 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:00:55,630 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 10:00:55,631 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:00:55,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:00:55,635 INFO L82 PathProgramCache]: Analyzing trace with hash 806369108, now seen corresponding path program 1 times [2020-12-22 10:00:55,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:00:55,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784991526] [2020-12-22 10:00:55,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:00:55,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:00:55,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:00:55,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784991526] [2020-12-22 10:00:55,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:00:55,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:00:55,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198317576] [2020-12-22 10:00:55,759 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:00:55,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:00:55,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:00:55,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:00:55,765 INFO L87 Difference]: Start difference. First operand 2720 states and 4256 transitions. Second operand 3 states. [2020-12-22 10:00:55,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:00:55,855 INFO L93 Difference]: Finished difference Result 3340 states and 5228 transitions. [2020-12-22 10:00:55,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:00:55,855 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 10:00:55,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:00:55,873 INFO L225 Difference]: With dead ends: 3340 [2020-12-22 10:00:55,873 INFO L226 Difference]: Without dead ends: 2922 [2020-12-22 10:00:55,878 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:00:55,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2922 states. [2020-12-22 10:00:55,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2922 to 2920. [2020-12-22 10:00:55,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2920 states. [2020-12-22 10:00:55,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2920 states to 2920 states and 4564 transitions. [2020-12-22 10:00:55,995 INFO L78 Accepts]: Start accepts. Automaton has 2920 states and 4564 transitions. Word has length 79 [2020-12-22 10:00:55,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:00:55,995 INFO L481 AbstractCegarLoop]: Abstraction has 2920 states and 4564 transitions. [2020-12-22 10:00:55,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:00:55,996 INFO L276 IsEmpty]: Start isEmpty. Operand 2920 states and 4564 transitions. [2020-12-22 10:00:56,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 10:00:56,004 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:00:56,004 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:00:56,004 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 10:00:56,004 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:00:56,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:00:56,005 INFO L82 PathProgramCache]: Analyzing trace with hash 872862620, now seen corresponding path program 1 times [2020-12-22 10:00:56,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:00:56,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961334161] [2020-12-22 10:00:56,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:00:56,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:00:56,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:00:56,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961334161] [2020-12-22 10:00:56,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:00:56,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:00:56,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953321406] [2020-12-22 10:00:56,325 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:00:56,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:00:56,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:00:56,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:00:56,326 INFO L87 Difference]: Start difference. First operand 2920 states and 4564 transitions. Second operand 8 states. [2020-12-22 10:00:56,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:00:56,760 INFO L93 Difference]: Finished difference Result 3538 states and 5528 transitions. [2020-12-22 10:00:56,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:00:56,761 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 79 [2020-12-22 10:00:56,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:00:56,777 INFO L225 Difference]: With dead ends: 3538 [2020-12-22 10:00:56,777 INFO L226 Difference]: Without dead ends: 2922 [2020-12-22 10:00:56,780 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2020-12-22 10:00:56,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2922 states. [2020-12-22 10:00:56,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2922 to 2920. [2020-12-22 10:00:56,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2920 states. [2020-12-22 10:00:56,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2920 states to 2920 states and 4558 transitions. [2020-12-22 10:00:56,887 INFO L78 Accepts]: Start accepts. Automaton has 2920 states and 4558 transitions. Word has length 79 [2020-12-22 10:00:56,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:00:56,888 INFO L481 AbstractCegarLoop]: Abstraction has 2920 states and 4558 transitions. [2020-12-22 10:00:56,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:00:56,888 INFO L276 IsEmpty]: Start isEmpty. Operand 2920 states and 4558 transitions. [2020-12-22 10:00:56,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 10:00:56,889 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:00:56,890 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:00:56,890 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 10:00:56,892 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:00:56,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:00:56,893 INFO L82 PathProgramCache]: Analyzing trace with hash -385682984, now seen corresponding path program 1 times [2020-12-22 10:00:56,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:00:56,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770384499] [2020-12-22 10:00:56,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:00:56,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:00:57,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:00:57,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770384499] [2020-12-22 10:00:57,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:00:57,080 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:00:57,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604020976] [2020-12-22 10:00:57,081 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:00:57,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:00:57,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:00:57,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:00:57,082 INFO L87 Difference]: Start difference. First operand 2920 states and 4558 transitions. Second operand 3 states. [2020-12-22 10:00:57,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:00:57,197 INFO L93 Difference]: Finished difference Result 4080 states and 6352 transitions. [2020-12-22 10:00:57,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:00:57,198 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 10:00:57,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:00:57,228 INFO L225 Difference]: With dead ends: 4080 [2020-12-22 10:00:57,228 INFO L226 Difference]: Without dead ends: 3464 [2020-12-22 10:00:57,231 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:00:57,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3464 states. [2020-12-22 10:00:57,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3464 to 3462. [2020-12-22 10:00:57,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3462 states. [2020-12-22 10:00:57,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3462 states to 3462 states and 5382 transitions. [2020-12-22 10:00:57,377 INFO L78 Accepts]: Start accepts. Automaton has 3462 states and 5382 transitions. Word has length 79 [2020-12-22 10:00:57,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:00:57,378 INFO L481 AbstractCegarLoop]: Abstraction has 3462 states and 5382 transitions. [2020-12-22 10:00:57,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:00:57,378 INFO L276 IsEmpty]: Start isEmpty. Operand 3462 states and 5382 transitions. [2020-12-22 10:00:57,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 10:00:57,379 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:00:57,379 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:00:57,379 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 10:00:57,380 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:00:57,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:00:57,380 INFO L82 PathProgramCache]: Analyzing trace with hash -111995272, now seen corresponding path program 1 times [2020-12-22 10:00:57,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:00:57,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163804114] [2020-12-22 10:00:57,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:00:57,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:00:57,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:00:57,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163804114] [2020-12-22 10:00:57,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:00:57,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:00:57,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566346384] [2020-12-22 10:00:57,461 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:00:57,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:00:57,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:00:57,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:00:57,466 INFO L87 Difference]: Start difference. First operand 3462 states and 5382 transitions. Second operand 3 states. [2020-12-22 10:00:57,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:00:57,663 INFO L93 Difference]: Finished difference Result 5634 states and 8704 transitions. [2020-12-22 10:00:57,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:00:57,664 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 10:00:57,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:00:57,689 INFO L225 Difference]: With dead ends: 5634 [2020-12-22 10:00:57,689 INFO L226 Difference]: Without dead ends: 4476 [2020-12-22 10:00:57,694 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:00:57,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4476 states. [2020-12-22 10:00:57,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4476 to 4474. [2020-12-22 10:00:57,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4474 states. [2020-12-22 10:00:57,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4474 states to 4474 states and 6898 transitions. [2020-12-22 10:00:57,960 INFO L78 Accepts]: Start accepts. Automaton has 4474 states and 6898 transitions. Word has length 79 [2020-12-22 10:00:57,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:00:57,961 INFO L481 AbstractCegarLoop]: Abstraction has 4474 states and 6898 transitions. [2020-12-22 10:00:57,961 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:00:57,961 INFO L276 IsEmpty]: Start isEmpty. Operand 4474 states and 6898 transitions. [2020-12-22 10:00:57,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 10:00:57,962 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:00:57,963 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:00:57,963 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 10:00:57,963 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:00:57,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:00:57,964 INFO L82 PathProgramCache]: Analyzing trace with hash 1707076376, now seen corresponding path program 1 times [2020-12-22 10:00:57,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:00:57,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110606839] [2020-12-22 10:00:57,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:00:57,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:00:58,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:00:58,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110606839] [2020-12-22 10:00:58,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:00:58,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:00:58,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277283970] [2020-12-22 10:00:58,038 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:00:58,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:00:58,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:00:58,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:00:58,040 INFO L87 Difference]: Start difference. First operand 4474 states and 6898 transitions. Second operand 3 states. [2020-12-22 10:00:58,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:00:58,354 INFO L93 Difference]: Finished difference Result 8526 states and 13012 transitions. [2020-12-22 10:00:58,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:00:58,355 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 10:00:58,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:00:58,373 INFO L225 Difference]: With dead ends: 8526 [2020-12-22 10:00:58,373 INFO L226 Difference]: Without dead ends: 6356 [2020-12-22 10:00:58,379 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:00:58,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6356 states. [2020-12-22 10:00:58,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6356 to 6354. [2020-12-22 10:00:58,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6354 states. [2020-12-22 10:00:58,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6354 states to 6354 states and 9666 transitions. [2020-12-22 10:00:58,756 INFO L78 Accepts]: Start accepts. Automaton has 6354 states and 9666 transitions. Word has length 79 [2020-12-22 10:00:58,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:00:58,756 INFO L481 AbstractCegarLoop]: Abstraction has 6354 states and 9666 transitions. [2020-12-22 10:00:58,756 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:00:58,756 INFO L276 IsEmpty]: Start isEmpty. Operand 6354 states and 9666 transitions. [2020-12-22 10:00:58,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 10:00:58,757 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:00:58,758 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:00:58,758 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 10:00:58,758 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:00:58,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:00:58,759 INFO L82 PathProgramCache]: Analyzing trace with hash 1886482360, now seen corresponding path program 1 times [2020-12-22 10:00:58,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:00:58,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783642861] [2020-12-22 10:00:58,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:00:58,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:00:58,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:00:58,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783642861] [2020-12-22 10:00:58,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:00:58,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:00:58,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659198932] [2020-12-22 10:00:58,829 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:00:58,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:00:58,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:00:58,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:00:58,831 INFO L87 Difference]: Start difference. First operand 6354 states and 9666 transitions. Second operand 3 states. [2020-12-22 10:00:59,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:00:59,537 INFO L93 Difference]: Finished difference Result 13878 states and 20836 transitions. [2020-12-22 10:00:59,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:00:59,538 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 10:00:59,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:00:59,567 INFO L225 Difference]: With dead ends: 13878 [2020-12-22 10:00:59,567 INFO L226 Difference]: Without dead ends: 9828 [2020-12-22 10:00:59,578 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:00:59,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9828 states. [2020-12-22 10:01:00,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9828 to 9826. [2020-12-22 10:01:00,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9826 states. [2020-12-22 10:01:00,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9826 states to 9826 states and 14674 transitions. [2020-12-22 10:01:00,288 INFO L78 Accepts]: Start accepts. Automaton has 9826 states and 14674 transitions. Word has length 79 [2020-12-22 10:01:00,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:01:00,289 INFO L481 AbstractCegarLoop]: Abstraction has 9826 states and 14674 transitions. [2020-12-22 10:01:00,289 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:01:00,289 INFO L276 IsEmpty]: Start isEmpty. Operand 9826 states and 14674 transitions. [2020-12-22 10:01:00,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 10:01:00,290 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:01:00,290 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:01:00,291 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 10:01:00,291 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:01:00,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:01:00,291 INFO L82 PathProgramCache]: Analyzing trace with hash 874214487, now seen corresponding path program 1 times [2020-12-22 10:01:00,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:01:00,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715772036] [2020-12-22 10:01:00,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:01:00,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:01:00,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:01:00,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715772036] [2020-12-22 10:01:00,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:01:00,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:01:00,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876053781] [2020-12-22 10:01:00,439 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:01:00,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:01:00,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:01:00,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:01:00,446 INFO L87 Difference]: Start difference. First operand 9826 states and 14674 transitions. Second operand 8 states. [2020-12-22 10:01:01,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:01:01,755 INFO L93 Difference]: Finished difference Result 16289 states and 23945 transitions. [2020-12-22 10:01:01,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:01:01,756 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 80 [2020-12-22 10:01:01,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:01:01,793 INFO L225 Difference]: With dead ends: 16289 [2020-12-22 10:01:01,793 INFO L226 Difference]: Without dead ends: 16287 [2020-12-22 10:01:01,799 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:01:01,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16287 states. [2020-12-22 10:01:02,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16287 to 10210. [2020-12-22 10:01:02,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10210 states. [2020-12-22 10:01:02,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10210 states to 10210 states and 15026 transitions. [2020-12-22 10:01:02,626 INFO L78 Accepts]: Start accepts. Automaton has 10210 states and 15026 transitions. Word has length 80 [2020-12-22 10:01:02,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:01:02,627 INFO L481 AbstractCegarLoop]: Abstraction has 10210 states and 15026 transitions. [2020-12-22 10:01:02,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:01:02,627 INFO L276 IsEmpty]: Start isEmpty. Operand 10210 states and 15026 transitions. [2020-12-22 10:01:02,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 10:01:02,635 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:01:02,636 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:01:02,636 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 10:01:02,636 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:01:02,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:01:02,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1411161737, now seen corresponding path program 1 times [2020-12-22 10:01:02,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:01:02,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983596926] [2020-12-22 10:01:02,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:01:02,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:01:02,838 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-12-22 10:01:02,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983596926] [2020-12-22 10:01:02,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:01:02,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:01:02,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316356498] [2020-12-22 10:01:02,840 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:01:02,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:01:02,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:01:02,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:01:02,841 INFO L87 Difference]: Start difference. First operand 10210 states and 15026 transitions. Second operand 8 states. [2020-12-22 10:01:05,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:01:05,914 INFO L93 Difference]: Finished difference Result 59216 states and 85737 transitions. [2020-12-22 10:01:05,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:01:05,914 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 112 [2020-12-22 10:01:05,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:01:06,043 INFO L225 Difference]: With dead ends: 59216 [2020-12-22 10:01:06,043 INFO L226 Difference]: Without dead ends: 51310 [2020-12-22 10:01:06,072 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:01:06,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51310 states. [2020-12-22 10:01:08,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51310 to 18114. [2020-12-22 10:01:08,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18114 states. [2020-12-22 10:01:08,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18114 states to 18114 states and 26354 transitions. [2020-12-22 10:01:08,063 INFO L78 Accepts]: Start accepts. Automaton has 18114 states and 26354 transitions. Word has length 112 [2020-12-22 10:01:08,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:01:08,063 INFO L481 AbstractCegarLoop]: Abstraction has 18114 states and 26354 transitions. [2020-12-22 10:01:08,063 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:01:08,063 INFO L276 IsEmpty]: Start isEmpty. Operand 18114 states and 26354 transitions. [2020-12-22 10:01:08,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 10:01:08,072 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:01:08,072 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:01:08,073 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 10:01:08,073 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:01:08,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:01:08,074 INFO L82 PathProgramCache]: Analyzing trace with hash -1381639519, now seen corresponding path program 1 times [2020-12-22 10:01:08,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:01:08,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561635143] [2020-12-22 10:01:08,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:01:08,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:01:08,221 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 10:01:08,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561635143] [2020-12-22 10:01:08,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:01:08,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:01:08,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819146344] [2020-12-22 10:01:08,223 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:01:08,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:01:08,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:01:08,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:01:08,224 INFO L87 Difference]: Start difference. First operand 18114 states and 26354 transitions. Second operand 8 states. [2020-12-22 10:01:11,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:01:11,343 INFO L93 Difference]: Finished difference Result 67120 states and 97065 transitions. [2020-12-22 10:01:11,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:01:11,343 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 112 [2020-12-22 10:01:11,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:01:11,487 INFO L225 Difference]: With dead ends: 67120 [2020-12-22 10:01:11,487 INFO L226 Difference]: Without dead ends: 59214 [2020-12-22 10:01:11,516 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:01:11,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59214 states. [2020-12-22 10:01:14,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59214 to 29986. [2020-12-22 10:01:14,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29986 states. [2020-12-22 10:01:14,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29986 states to 29986 states and 43266 transitions. [2020-12-22 10:01:14,097 INFO L78 Accepts]: Start accepts. Automaton has 29986 states and 43266 transitions. Word has length 112 [2020-12-22 10:01:14,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:01:14,097 INFO L481 AbstractCegarLoop]: Abstraction has 29986 states and 43266 transitions. [2020-12-22 10:01:14,098 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:01:14,098 INFO L276 IsEmpty]: Start isEmpty. Operand 29986 states and 43266 transitions. [2020-12-22 10:01:14,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 10:01:14,107 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:01:14,108 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:01:14,108 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 10:01:14,108 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:01:14,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:01:14,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1107951807, now seen corresponding path program 1 times [2020-12-22 10:01:14,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:01:14,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92145005] [2020-12-22 10:01:14,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:01:14,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:01:14,261 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-22 10:01:14,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92145005] [2020-12-22 10:01:14,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:01:14,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:01:14,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609934004] [2020-12-22 10:01:14,266 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:01:14,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:01:14,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:01:14,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:01:14,267 INFO L87 Difference]: Start difference. First operand 29986 states and 43266 transitions. Second operand 8 states. [2020-12-22 10:01:18,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:01:18,598 INFO L93 Difference]: Finished difference Result 75024 states and 108393 transitions. [2020-12-22 10:01:18,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:01:18,599 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 112 [2020-12-22 10:01:18,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:01:18,760 INFO L225 Difference]: With dead ends: 75024 [2020-12-22 10:01:18,760 INFO L226 Difference]: Without dead ends: 67118 [2020-12-22 10:01:18,794 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:01:18,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67118 states. [2020-12-22 10:01:21,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67118 to 37890. [2020-12-22 10:01:21,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37890 states. [2020-12-22 10:01:21,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37890 states to 37890 states and 54594 transitions. [2020-12-22 10:01:21,839 INFO L78 Accepts]: Start accepts. Automaton has 37890 states and 54594 transitions. Word has length 112 [2020-12-22 10:01:21,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:01:21,840 INFO L481 AbstractCegarLoop]: Abstraction has 37890 states and 54594 transitions. [2020-12-22 10:01:21,840 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:01:21,840 INFO L276 IsEmpty]: Start isEmpty. Operand 37890 states and 54594 transitions. [2020-12-22 10:01:21,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 10:01:21,851 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:01:21,852 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:01:21,852 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 10:01:21,852 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:01:21,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:01:21,853 INFO L82 PathProgramCache]: Analyzing trace with hash 711119841, now seen corresponding path program 1 times [2020-12-22 10:01:21,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:01:21,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798086828] [2020-12-22 10:01:21,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:01:21,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:01:21,999 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 10:01:22,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798086828] [2020-12-22 10:01:22,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:01:22,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:01:22,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489921725] [2020-12-22 10:01:22,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:01:22,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:01:22,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:01:22,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:01:22,002 INFO L87 Difference]: Start difference. First operand 37890 states and 54594 transitions. Second operand 8 states. [2020-12-22 10:01:26,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:01:26,848 INFO L93 Difference]: Finished difference Result 82928 states and 119721 transitions. [2020-12-22 10:01:26,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:01:26,848 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 112 [2020-12-22 10:01:26,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:01:26,972 INFO L225 Difference]: With dead ends: 82928 [2020-12-22 10:01:26,972 INFO L226 Difference]: Without dead ends: 75022 [2020-12-22 10:01:26,998 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:01:27,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75022 states. [2020-12-22 10:01:30,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75022 to 45794. [2020-12-22 10:01:30,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45794 states. [2020-12-22 10:01:30,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45794 states to 45794 states and 65922 transitions. [2020-12-22 10:01:30,711 INFO L78 Accepts]: Start accepts. Automaton has 45794 states and 65922 transitions. Word has length 112 [2020-12-22 10:01:30,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:01:30,712 INFO L481 AbstractCegarLoop]: Abstraction has 45794 states and 65922 transitions. [2020-12-22 10:01:30,712 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:01:30,712 INFO L276 IsEmpty]: Start isEmpty. Operand 45794 states and 65922 transitions. [2020-12-22 10:01:30,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 10:01:30,722 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:01:30,722 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:01:30,722 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 10:01:30,723 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:01:30,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:01:30,723 INFO L82 PathProgramCache]: Analyzing trace with hash 890525825, now seen corresponding path program 1 times [2020-12-22 10:01:30,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:01:30,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187250967] [2020-12-22 10:01:30,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:01:30,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:01:30,862 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 10:01:30,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187250967] [2020-12-22 10:01:30,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:01:30,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:01:30,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168513890] [2020-12-22 10:01:30,865 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:01:30,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:01:30,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:01:30,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:01:30,867 INFO L87 Difference]: Start difference. First operand 45794 states and 65922 transitions. Second operand 8 states. [2020-12-22 10:01:36,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:01:36,530 INFO L93 Difference]: Finished difference Result 90832 states and 131049 transitions. [2020-12-22 10:01:36,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:01:36,531 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 112 [2020-12-22 10:01:36,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:01:36,643 INFO L225 Difference]: With dead ends: 90832 [2020-12-22 10:01:36,643 INFO L226 Difference]: Without dead ends: 82926 [2020-12-22 10:01:36,673 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:01:36,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82926 states. [2020-12-22 10:01:41,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82926 to 53698. [2020-12-22 10:01:41,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53698 states. [2020-12-22 10:01:41,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53698 states to 53698 states and 77250 transitions. [2020-12-22 10:01:41,224 INFO L78 Accepts]: Start accepts. Automaton has 53698 states and 77250 transitions. Word has length 112 [2020-12-22 10:01:41,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:01:41,225 INFO L481 AbstractCegarLoop]: Abstraction has 53698 states and 77250 transitions. [2020-12-22 10:01:41,225 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:01:41,225 INFO L276 IsEmpty]: Start isEmpty. Operand 53698 states and 77250 transitions. [2020-12-22 10:01:41,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 10:01:41,237 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:01:41,238 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:01:41,238 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 10:01:41,238 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:01:41,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:01:41,239 INFO L82 PathProgramCache]: Analyzing trace with hash -420877289, now seen corresponding path program 1 times [2020-12-22 10:01:41,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:01:41,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022009180] [2020-12-22 10:01:41,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:01:41,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:01:41,377 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 10:01:41,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022009180] [2020-12-22 10:01:41,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:01:41,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:01:41,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547988393] [2020-12-22 10:01:41,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:01:41,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:01:41,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:01:41,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:01:41,380 INFO L87 Difference]: Start difference. First operand 53698 states and 77250 transitions. Second operand 8 states. [2020-12-22 10:01:47,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:01:47,966 INFO L93 Difference]: Finished difference Result 93936 states and 135529 transitions. [2020-12-22 10:01:47,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:01:47,967 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 112 [2020-12-22 10:01:47,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:01:48,066 INFO L225 Difference]: With dead ends: 93936 [2020-12-22 10:01:48,066 INFO L226 Difference]: Without dead ends: 88430 [2020-12-22 10:01:48,098 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:01:48,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88430 states. [2020-12-22 10:01:53,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88430 to 59202. [2020-12-22 10:01:53,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59202 states. [2020-12-22 10:01:53,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59202 states to 59202 states and 85186 transitions. [2020-12-22 10:01:53,116 INFO L78 Accepts]: Start accepts. Automaton has 59202 states and 85186 transitions. Word has length 112 [2020-12-22 10:01:53,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:01:53,116 INFO L481 AbstractCegarLoop]: Abstraction has 59202 states and 85186 transitions. [2020-12-22 10:01:53,116 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:01:53,116 INFO L276 IsEmpty]: Start isEmpty. Operand 59202 states and 85186 transitions. [2020-12-22 10:01:53,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-12-22 10:01:53,130 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:01:53,130 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:01:53,130 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 10:01:53,131 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:01:53,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:01:53,131 INFO L82 PathProgramCache]: Analyzing trace with hash 746098925, now seen corresponding path program 1 times [2020-12-22 10:01:53,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:01:53,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811184279] [2020-12-22 10:01:53,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:01:53,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:01:53,218 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:01:53,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811184279] [2020-12-22 10:01:53,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:01:53,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:01:53,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955527865] [2020-12-22 10:01:53,220 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:01:53,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:01:53,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:01:53,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:01:53,221 INFO L87 Difference]: Start difference. First operand 59202 states and 85186 transitions. Second operand 3 states. [2020-12-22 10:01:57,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:01:57,819 INFO L93 Difference]: Finished difference Result 116102 states and 166772 transitions. [2020-12-22 10:01:57,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:01:57,820 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 113 [2020-12-22 10:01:57,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:01:57,883 INFO L225 Difference]: With dead ends: 116102 [2020-12-22 10:01:57,883 INFO L226 Difference]: Without dead ends: 59204 [2020-12-22 10:01:57,914 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:01:57,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59204 states. [2020-12-22 10:02:02,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59204 to 59202. [2020-12-22 10:02:02,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59202 states. [2020-12-22 10:02:02,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59202 states to 59202 states and 84498 transitions. [2020-12-22 10:02:02,818 INFO L78 Accepts]: Start accepts. Automaton has 59202 states and 84498 transitions. Word has length 113 [2020-12-22 10:02:02,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:02:02,819 INFO L481 AbstractCegarLoop]: Abstraction has 59202 states and 84498 transitions. [2020-12-22 10:02:02,819 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:02:02,819 INFO L276 IsEmpty]: Start isEmpty. Operand 59202 states and 84498 transitions. [2020-12-22 10:02:02,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-12-22 10:02:02,824 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:02:02,825 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:02:02,825 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 10:02:02,825 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:02:02,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:02:02,826 INFO L82 PathProgramCache]: Analyzing trace with hash -1169646557, now seen corresponding path program 1 times [2020-12-22 10:02:02,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:02:02,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636258971] [2020-12-22 10:02:02,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:02:02,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:02:03,050 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:02:03,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636258971] [2020-12-22 10:02:03,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:02:03,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:02:03,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572988873] [2020-12-22 10:02:03,052 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:02:03,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:02:03,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:02:03,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:02:03,053 INFO L87 Difference]: Start difference. First operand 59202 states and 84498 transitions. Second operand 3 states. [2020-12-22 10:02:05,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:02:05,717 INFO L93 Difference]: Finished difference Result 87654 states and 124948 transitions. [2020-12-22 10:02:05,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:02:05,717 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 113 [2020-12-22 10:02:05,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:02:05,751 INFO L225 Difference]: With dead ends: 87654 [2020-12-22 10:02:05,751 INFO L226 Difference]: Without dead ends: 30756 [2020-12-22 10:02:05,775 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:02:05,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30756 states. [2020-12-22 10:02:08,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30756 to 30754. [2020-12-22 10:02:08,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30754 states. [2020-12-22 10:02:08,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30754 states to 30754 states and 43706 transitions. [2020-12-22 10:02:08,280 INFO L78 Accepts]: Start accepts. Automaton has 30754 states and 43706 transitions. Word has length 113 [2020-12-22 10:02:08,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:02:08,280 INFO L481 AbstractCegarLoop]: Abstraction has 30754 states and 43706 transitions. [2020-12-22 10:02:08,280 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:02:08,280 INFO L276 IsEmpty]: Start isEmpty. Operand 30754 states and 43706 transitions. [2020-12-22 10:02:08,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-12-22 10:02:08,284 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:02:08,284 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:02:08,284 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 10:02:08,284 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:02:08,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:02:08,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1209709145, now seen corresponding path program 1 times [2020-12-22 10:02:08,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:02:08,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427861457] [2020-12-22 10:02:08,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:02:08,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:02:08,365 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:02:08,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427861457] [2020-12-22 10:02:08,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:02:08,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:02:08,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030101780] [2020-12-22 10:02:08,367 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:02:08,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:02:08,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:02:08,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:02:08,368 INFO L87 Difference]: Start difference. First operand 30754 states and 43706 transitions. Second operand 3 states. [2020-12-22 10:02:09,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:02:09,680 INFO L93 Difference]: Finished difference Result 44982 states and 63760 transitions. [2020-12-22 10:02:09,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:02:09,683 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 113 [2020-12-22 10:02:09,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:02:09,704 INFO L225 Difference]: With dead ends: 44982 [2020-12-22 10:02:09,704 INFO L226 Difference]: Without dead ends: 16532 [2020-12-22 10:02:09,719 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:02:09,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16532 states. [2020-12-22 10:02:10,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16532 to 16530. [2020-12-22 10:02:10,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16530 states. [2020-12-22 10:02:10,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16530 states to 16530 states and 23482 transitions. [2020-12-22 10:02:10,957 INFO L78 Accepts]: Start accepts. Automaton has 16530 states and 23482 transitions. Word has length 113 [2020-12-22 10:02:10,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:02:10,957 INFO L481 AbstractCegarLoop]: Abstraction has 16530 states and 23482 transitions. [2020-12-22 10:02:10,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:02:10,957 INFO L276 IsEmpty]: Start isEmpty. Operand 16530 states and 23482 transitions. [2020-12-22 10:02:10,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-12-22 10:02:10,959 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:02:10,960 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:02:10,960 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 10:02:10,960 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:02:10,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:02:10,960 INFO L82 PathProgramCache]: Analyzing trace with hash -1498655857, now seen corresponding path program 1 times [2020-12-22 10:02:10,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:02:10,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235319229] [2020-12-22 10:02:10,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:02:10,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:02:11,038 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:02:11,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235319229] [2020-12-22 10:02:11,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:02:11,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:02:11,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350313348] [2020-12-22 10:02:11,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:02:11,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:02:11,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:02:11,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:02:11,040 INFO L87 Difference]: Start difference. First operand 16530 states and 23482 transitions. Second operand 3 states. [2020-12-22 10:02:11,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:02:11,699 INFO L93 Difference]: Finished difference Result 23646 states and 33424 transitions. [2020-12-22 10:02:11,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:02:11,699 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 113 [2020-12-22 10:02:11,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:02:11,710 INFO L225 Difference]: With dead ends: 23646 [2020-12-22 10:02:11,710 INFO L226 Difference]: Without dead ends: 9420 [2020-12-22 10:02:11,719 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:02:11,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9420 states. [2020-12-22 10:02:12,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9420 to 9418. [2020-12-22 10:02:12,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9418 states. [2020-12-22 10:02:12,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9418 states to 9418 states and 13456 transitions. [2020-12-22 10:02:12,296 INFO L78 Accepts]: Start accepts. Automaton has 9418 states and 13456 transitions. Word has length 113 [2020-12-22 10:02:12,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:02:12,297 INFO L481 AbstractCegarLoop]: Abstraction has 9418 states and 13456 transitions. [2020-12-22 10:02:12,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:02:12,297 INFO L276 IsEmpty]: Start isEmpty. Operand 9418 states and 13456 transitions. [2020-12-22 10:02:12,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-12-22 10:02:12,298 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:02:12,299 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:02:12,299 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 10:02:12,299 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:02:12,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:02:12,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1585774651, now seen corresponding path program 1 times [2020-12-22 10:02:12,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:02:12,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624045348] [2020-12-22 10:02:12,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:02:12,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:02:12,814 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:02:12,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624045348] [2020-12-22 10:02:12,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703581509] [2020-12-22 10:02:12,815 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 10:02:13,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:02:13,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-22 10:02:13,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:02:13,596 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 10:02:13,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:02:13,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 21 [2020-12-22 10:02:13,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459620048] [2020-12-22 10:02:13,598 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 10:02:13,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:02:13,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 10:02:13,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2020-12-22 10:02:13,599 INFO L87 Difference]: Start difference. First operand 9418 states and 13456 transitions. Second operand 21 states. [2020-12-22 10:02:17,508 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2020-12-22 10:02:17,870 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-12-22 10:02:18,089 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2020-12-22 10:02:18,324 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2020-12-22 10:02:18,647 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2020-12-22 10:02:22,734 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2020-12-22 10:02:24,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:02:24,244 INFO L93 Difference]: Finished difference Result 57297 states and 78761 transitions. [2020-12-22 10:02:24,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2020-12-22 10:02:24,245 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 113 [2020-12-22 10:02:24,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:02:24,394 INFO L225 Difference]: With dead ends: 57297 [2020-12-22 10:02:24,394 INFO L226 Difference]: Without dead ends: 50183 [2020-12-22 10:02:24,412 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3479 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1672, Invalid=8228, Unknown=0, NotChecked=0, Total=9900 [2020-12-22 10:02:24,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50183 states. [2020-12-22 10:02:27,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50183 to 32438. [2020-12-22 10:02:27,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32438 states. [2020-12-22 10:02:27,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32438 states to 32438 states and 44624 transitions. [2020-12-22 10:02:27,596 INFO L78 Accepts]: Start accepts. Automaton has 32438 states and 44624 transitions. Word has length 113 [2020-12-22 10:02:27,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:02:27,597 INFO L481 AbstractCegarLoop]: Abstraction has 32438 states and 44624 transitions. [2020-12-22 10:02:27,597 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 10:02:27,597 INFO L276 IsEmpty]: Start isEmpty. Operand 32438 states and 44624 transitions. [2020-12-22 10:02:27,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-12-22 10:02:27,602 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:02:27,602 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:02:27,815 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-22 10:02:27,816 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:02:27,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:02:27,817 INFO L82 PathProgramCache]: Analyzing trace with hash -409173495, now seen corresponding path program 1 times [2020-12-22 10:02:27,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:02:27,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917180364] [2020-12-22 10:02:27,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:02:27,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:02:28,068 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:02:28,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917180364] [2020-12-22 10:02:28,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226984869] [2020-12-22 10:02:28,069 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 10:02:28,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:02:28,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 10:02:28,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:02:28,463 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 10:02:28,824 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:02:28,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:02:28,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-12-22 10:02:28,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139612093] [2020-12-22 10:02:28,827 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 10:02:28,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:02:28,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 10:02:28,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2020-12-22 10:02:28,828 INFO L87 Difference]: Start difference. First operand 32438 states and 44624 transitions. Second operand 18 states. [2020-12-22 10:02:31,213 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 10:02:31,675 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 10:02:34,061 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-12-22 10:02:34,204 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 10:02:34,804 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-12-22 10:02:34,933 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 10:02:37,021 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 10:02:39,301 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 10:02:39,664 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 10:02:39,831 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 10:02:40,692 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-12-22 10:02:40,953 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-12-22 10:02:41,118 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-12-22 10:02:41,822 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-12-22 10:02:45,830 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-12-22 10:02:46,125 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-12-22 10:03:16,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:03:16,508 INFO L93 Difference]: Finished difference Result 352698 states and 477273 transitions. [2020-12-22 10:03:16,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2020-12-22 10:03:16,509 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 114 [2020-12-22 10:03:16,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:03:17,181 INFO L225 Difference]: With dead ends: 352698 [2020-12-22 10:03:17,181 INFO L226 Difference]: Without dead ends: 322564 [2020-12-22 10:03:17,261 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6383 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=2552, Invalid=14478, Unknown=0, NotChecked=0, Total=17030 [2020-12-22 10:03:17,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322564 states. [2020-12-22 10:03:34,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322564 to 138715. [2020-12-22 10:03:34,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138715 states. [2020-12-22 10:03:34,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138715 states to 138715 states and 186150 transitions. [2020-12-22 10:03:34,369 INFO L78 Accepts]: Start accepts. Automaton has 138715 states and 186150 transitions. Word has length 114 [2020-12-22 10:03:34,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:03:34,369 INFO L481 AbstractCegarLoop]: Abstraction has 138715 states and 186150 transitions. [2020-12-22 10:03:34,369 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 10:03:34,369 INFO L276 IsEmpty]: Start isEmpty. Operand 138715 states and 186150 transitions. [2020-12-22 10:03:34,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-12-22 10:03:34,373 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:03:34,374 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:03:34,588 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-22 10:03:34,589 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:03:34,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:03:34,591 INFO L82 PathProgramCache]: Analyzing trace with hash 1061210015, now seen corresponding path program 1 times [2020-12-22 10:03:34,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:03:34,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135141809] [2020-12-22 10:03:34,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:03:34,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:03:34,983 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:03:34,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135141809] [2020-12-22 10:03:34,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:03:34,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:03:34,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764090775] [2020-12-22 10:03:34,985 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:03:34,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:03:34,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:03:34,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:03:34,986 INFO L87 Difference]: Start difference. First operand 138715 states and 186150 transitions. Second operand 3 states. [2020-12-22 10:03:41,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:03:41,557 INFO L93 Difference]: Finished difference Result 190807 states and 255285 transitions. [2020-12-22 10:03:41,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:03:41,558 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 114 [2020-12-22 10:03:41,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:03:41,625 INFO L225 Difference]: With dead ends: 190807 [2020-12-22 10:03:41,625 INFO L226 Difference]: Without dead ends: 54396 [2020-12-22 10:03:41,680 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:03:41,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54396 states. [2020-12-22 10:03:47,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54396 to 50920. [2020-12-22 10:03:47,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50920 states. [2020-12-22 10:03:47,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50920 states to 50920 states and 67732 transitions. [2020-12-22 10:03:47,498 INFO L78 Accepts]: Start accepts. Automaton has 50920 states and 67732 transitions. Word has length 114 [2020-12-22 10:03:47,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:03:47,499 INFO L481 AbstractCegarLoop]: Abstraction has 50920 states and 67732 transitions. [2020-12-22 10:03:47,499 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:03:47,499 INFO L276 IsEmpty]: Start isEmpty. Operand 50920 states and 67732 transitions. [2020-12-22 10:03:47,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-12-22 10:03:47,502 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:03:47,502 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:03:47,502 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-12-22 10:03:47,502 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:03:47,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:03:47,503 INFO L82 PathProgramCache]: Analyzing trace with hash 707187499, now seen corresponding path program 1 times [2020-12-22 10:03:47,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:03:47,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050101574] [2020-12-22 10:03:47,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:03:47,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:03:47,603 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 10:03:47,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050101574] [2020-12-22 10:03:47,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:03:47,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:03:47,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450963607] [2020-12-22 10:03:47,604 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 10:03:47,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:03:47,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 10:03:47,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:03:47,605 INFO L87 Difference]: Start difference. First operand 50920 states and 67732 transitions. Second operand 6 states. [2020-12-22 10:03:51,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:03:51,028 INFO L93 Difference]: Finished difference Result 75520 states and 100594 transitions. [2020-12-22 10:03:51,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 10:03:51,029 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 114 [2020-12-22 10:03:51,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:03:51,061 INFO L225 Difference]: With dead ends: 75520 [2020-12-22 10:03:51,062 INFO L226 Difference]: Without dead ends: 27021 [2020-12-22 10:03:51,075 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 10:03:51,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27021 states. [2020-12-22 10:03:54,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27021 to 27021. [2020-12-22 10:03:54,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27021 states. [2020-12-22 10:03:54,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27021 states to 27021 states and 36248 transitions. [2020-12-22 10:03:54,067 INFO L78 Accepts]: Start accepts. Automaton has 27021 states and 36248 transitions. Word has length 114 [2020-12-22 10:03:54,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:03:54,067 INFO L481 AbstractCegarLoop]: Abstraction has 27021 states and 36248 transitions. [2020-12-22 10:03:54,067 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 10:03:54,067 INFO L276 IsEmpty]: Start isEmpty. Operand 27021 states and 36248 transitions. [2020-12-22 10:03:54,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-12-22 10:03:54,069 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:03:54,070 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:03:54,070 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-12-22 10:03:54,070 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:03:54,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:03:54,070 INFO L82 PathProgramCache]: Analyzing trace with hash 125621387, now seen corresponding path program 1 times [2020-12-22 10:03:54,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:03:54,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548288834] [2020-12-22 10:03:54,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:03:54,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:03:54,173 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-22 10:03:54,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548288834] [2020-12-22 10:03:54,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:03:54,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:03:54,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245010904] [2020-12-22 10:03:54,174 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 10:03:54,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:03:54,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 10:03:54,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:03:54,175 INFO L87 Difference]: Start difference. First operand 27021 states and 36248 transitions. Second operand 6 states. [2020-12-22 10:03:56,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:03:56,777 INFO L93 Difference]: Finished difference Result 46014 states and 61345 transitions. [2020-12-22 10:03:56,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 10:03:56,777 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 114 [2020-12-22 10:03:56,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:03:56,928 INFO L225 Difference]: With dead ends: 46014 [2020-12-22 10:03:56,929 INFO L226 Difference]: Without dead ends: 21452 [2020-12-22 10:03:56,942 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 10:03:56,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21452 states. [2020-12-22 10:03:59,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21452 to 21452. [2020-12-22 10:03:59,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21452 states. [2020-12-22 10:03:59,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21452 states to 21452 states and 28586 transitions. [2020-12-22 10:03:59,344 INFO L78 Accepts]: Start accepts. Automaton has 21452 states and 28586 transitions. Word has length 114 [2020-12-22 10:03:59,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:03:59,344 INFO L481 AbstractCegarLoop]: Abstraction has 21452 states and 28586 transitions. [2020-12-22 10:03:59,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 10:03:59,344 INFO L276 IsEmpty]: Start isEmpty. Operand 21452 states and 28586 transitions. [2020-12-22 10:03:59,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-12-22 10:03:59,347 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:03:59,347 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:03:59,347 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-12-22 10:03:59,347 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:03:59,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:03:59,348 INFO L82 PathProgramCache]: Analyzing trace with hash -165021109, now seen corresponding path program 1 times [2020-12-22 10:03:59,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:03:59,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912089783] [2020-12-22 10:03:59,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:03:59,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:03:59,444 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-22 10:03:59,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912089783] [2020-12-22 10:03:59,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:03:59,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:03:59,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687676761] [2020-12-22 10:03:59,445 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 10:03:59,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:03:59,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 10:03:59,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:03:59,447 INFO L87 Difference]: Start difference. First operand 21452 states and 28586 transitions. Second operand 6 states. [2020-12-22 10:04:03,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:04:03,877 INFO L93 Difference]: Finished difference Result 55740 states and 73946 transitions. [2020-12-22 10:04:03,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 10:04:03,878 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 114 [2020-12-22 10:04:03,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:04:03,915 INFO L225 Difference]: With dead ends: 55740 [2020-12-22 10:04:03,915 INFO L226 Difference]: Without dead ends: 36636 [2020-12-22 10:04:03,926 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 10:04:03,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36636 states.