/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/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 08:27:26,614 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 08:27:26,617 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 08:27:26,653 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 08:27:26,653 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 08:27:26,655 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 08:27:26,657 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 08:27:26,660 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 08:27:26,683 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 08:27:26,684 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 08:27:26,686 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 08:27:26,687 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 08:27:26,688 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 08:27:26,689 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 08:27:26,691 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 08:27:26,692 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 08:27:26,693 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 08:27:26,694 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 08:27:26,697 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 08:27:26,699 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 08:27:26,701 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 08:27:26,702 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 08:27:26,704 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 08:27:26,705 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 08:27:26,708 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 08:27:26,713 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 08:27:26,714 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 08:27:26,715 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 08:27:26,716 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 08:27:26,717 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 08:27:26,718 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 08:27:26,719 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 08:27:26,719 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 08:27:26,719 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 08:27:26,720 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 08:27:26,723 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 08:27:26,725 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 08:27:26,753 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 08:27:26,754 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 08:27:26,755 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 08:27:26,756 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 08:27:26,756 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 08:27:26,756 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 08:27:26,757 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 08:27:26,757 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 08:27:26,757 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 08:27:26,758 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 08:27:26,758 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 08:27:26,758 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 08:27:26,759 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 08:27:26,759 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 08:27:26,759 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 08:27:26,760 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 08:27:26,760 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 08:27:26,760 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 08:27:26,760 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 08:27:26,761 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 08:27:26,761 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 08:27:26,761 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 08:27:26,762 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 08:27:26,762 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 08:27:26,762 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 08:27:26,762 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 08:27:27,130 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 08:27:27,174 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 08:27:27,178 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 08:27:27,179 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 08:27:27,180 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 08:27:27,181 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2020-12-22 08:27:27,286 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6236a37fa/111f360ce7b2492aa4cac392d885a477/FLAGdedbc0651 [2020-12-22 08:27:28,596 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 08:27:28,597 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2020-12-22 08:27:28,689 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6236a37fa/111f360ce7b2492aa4cac392d885a477/FLAGdedbc0651 [2020-12-22 08:27:28,835 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6236a37fa/111f360ce7b2492aa4cac392d885a477 [2020-12-22 08:27:28,839 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 08:27:28,842 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 08:27:28,846 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 08:27:28,846 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 08:27:28,851 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 08:27:28,852 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:27:28" (1/1) ... [2020-12-22 08:27:28,854 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f0896ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:27:28, skipping insertion in model container [2020-12-22 08:27:28,854 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:27:28" (1/1) ... [2020-12-22 08:27:28,863 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 08:27:29,239 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 08:27:29,749 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/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c[19600,19613] [2020-12-22 08:27:31,478 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:27:31,513 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 08:27:31,629 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/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c[19600,19613] [2020-12-22 08:27:32,989 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:27:33,037 INFO L208 MainTranslator]: Completed translation [2020-12-22 08:27:33,037 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:27:33 WrapperNode [2020-12-22 08:27:33,037 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 08:27:33,039 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 08:27:33,039 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 08:27:33,039 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 08:27:33,048 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:27:33" (1/1) ... [2020-12-22 08:27:33,176 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:27:33" (1/1) ... [2020-12-22 08:27:33,536 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 08:27:33,538 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 08:27:33,538 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 08:27:33,538 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 08:27:33,554 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:27:33" (1/1) ... [2020-12-22 08:27:33,554 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:27:33" (1/1) ... [2020-12-22 08:27:33,653 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:27:33" (1/1) ... [2020-12-22 08:27:33,653 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:27:33" (1/1) ... [2020-12-22 08:27:33,964 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:27:33" (1/1) ... [2020-12-22 08:27:34,029 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:27:33" (1/1) ... [2020-12-22 08:27:34,062 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:27:33" (1/1) ... [2020-12-22 08:27:34,114 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 08:27:34,115 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 08:27:34,115 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 08:27:34,115 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 08:27:34,116 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:27:33" (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 08:27:34,227 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 08:27:34,227 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 08:27:34,227 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 08:27:34,227 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 08:27:43,424 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 08:27:43,425 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 08:27:43,430 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:27:43 BoogieIcfgContainer [2020-12-22 08:27:43,431 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 08:27:43,433 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 08:27:43,433 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 08:27:43,437 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 08:27:43,437 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 08:27:28" (1/3) ... [2020-12-22 08:27:43,438 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68fb0367 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:27:43, skipping insertion in model container [2020-12-22 08:27:43,438 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:27:33" (2/3) ... [2020-12-22 08:27:43,439 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68fb0367 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:27:43, skipping insertion in model container [2020-12-22 08:27:43,439 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:27:43" (3/3) ... [2020-12-22 08:27:43,441 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.5.1.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2020-12-22 08:27:43,449 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 08:27:43,456 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 08:27:43,478 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 08:27:43,522 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 08:27:43,522 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 08:27:43,522 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 08:27:43,522 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 08:27:43,522 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 08:27:43,523 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 08:27:43,523 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 08:27:43,523 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 08:27:43,580 INFO L276 IsEmpty]: Start isEmpty. Operand 2875 states. [2020-12-22 08:27:43,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 08:27:43,619 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:27:43,621 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 08:27:43,621 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:27:43,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:27:43,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1826416770, now seen corresponding path program 1 times [2020-12-22 08:27:43,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:27:43,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846732685] [2020-12-22 08:27:43,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:27:44,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:27:44,484 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 08:27:44,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846732685] [2020-12-22 08:27:44,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:27:44,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:27:44,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971666258] [2020-12-22 08:27:44,500 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:27:44,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:27:44,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:27:44,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:27:44,521 INFO L87 Difference]: Start difference. First operand 2875 states. Second operand 6 states. [2020-12-22 08:27:46,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:27:46,883 INFO L93 Difference]: Finished difference Result 4509 states and 8431 transitions. [2020-12-22 08:27:46,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:27:46,885 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 79 [2020-12-22 08:27:46,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:27:46,947 INFO L225 Difference]: With dead ends: 4509 [2020-12-22 08:27:46,947 INFO L226 Difference]: Without dead ends: 2497 [2020-12-22 08:27:46,959 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-12-22 08:27:46,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2497 states. [2020-12-22 08:27:47,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2497 to 2493. [2020-12-22 08:27:47,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2493 states. [2020-12-22 08:27:47,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2493 states to 2493 states and 3296 transitions. [2020-12-22 08:27:47,160 INFO L78 Accepts]: Start accepts. Automaton has 2493 states and 3296 transitions. Word has length 79 [2020-12-22 08:27:47,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:27:47,161 INFO L481 AbstractCegarLoop]: Abstraction has 2493 states and 3296 transitions. [2020-12-22 08:27:47,161 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:27:47,162 INFO L276 IsEmpty]: Start isEmpty. Operand 2493 states and 3296 transitions. [2020-12-22 08:27:47,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 08:27:47,170 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:27:47,170 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 08:27:47,171 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 08:27:47,171 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:27:47,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:27:47,172 INFO L82 PathProgramCache]: Analyzing trace with hash -827934042, now seen corresponding path program 1 times [2020-12-22 08:27:47,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:27:47,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823125202] [2020-12-22 08:27:47,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:27:47,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:27:47,463 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 08:27:47,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823125202] [2020-12-22 08:27:47,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:27:47,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:27:47,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247840273] [2020-12-22 08:27:47,468 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:27:47,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:27:47,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:27:47,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:27:47,473 INFO L87 Difference]: Start difference. First operand 2493 states and 3296 transitions. Second operand 6 states. [2020-12-22 08:27:48,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:27:48,791 INFO L93 Difference]: Finished difference Result 4914 states and 6801 transitions. [2020-12-22 08:27:48,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:27:48,791 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 80 [2020-12-22 08:27:48,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:27:48,808 INFO L225 Difference]: With dead ends: 4914 [2020-12-22 08:27:48,808 INFO L226 Difference]: Without dead ends: 3028 [2020-12-22 08:27:48,814 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-12-22 08:27:48,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3028 states. [2020-12-22 08:27:48,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3028 to 3024. [2020-12-22 08:27:48,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3024 states. [2020-12-22 08:27:48,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3024 states to 3024 states and 4238 transitions. [2020-12-22 08:27:48,939 INFO L78 Accepts]: Start accepts. Automaton has 3024 states and 4238 transitions. Word has length 80 [2020-12-22 08:27:48,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:27:48,942 INFO L481 AbstractCegarLoop]: Abstraction has 3024 states and 4238 transitions. [2020-12-22 08:27:48,942 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:27:48,942 INFO L276 IsEmpty]: Start isEmpty. Operand 3024 states and 4238 transitions. [2020-12-22 08:27:48,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 08:27:48,950 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:27:48,950 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:27:48,951 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 08:27:48,951 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:27:48,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:27:48,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1188468072, now seen corresponding path program 1 times [2020-12-22 08:27:48,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:27:48,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663247599] [2020-12-22 08:27:48,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:27:49,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:27:49,168 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 08:27:49,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663247599] [2020-12-22 08:27:49,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:27:49,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:27:49,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142104826] [2020-12-22 08:27:49,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:27:49,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:27:49,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:27:49,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:27:49,177 INFO L87 Difference]: Start difference. First operand 3024 states and 4238 transitions. Second operand 3 states. [2020-12-22 08:27:49,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:27:49,407 INFO L93 Difference]: Finished difference Result 5954 states and 8536 transitions. [2020-12-22 08:27:49,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:27:49,408 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2020-12-22 08:27:49,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:27:49,433 INFO L225 Difference]: With dead ends: 5954 [2020-12-22 08:27:49,433 INFO L226 Difference]: Without dead ends: 4359 [2020-12-22 08:27:49,439 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 08:27:49,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4359 states. [2020-12-22 08:27:49,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4359 to 4351. [2020-12-22 08:27:49,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4351 states. [2020-12-22 08:27:49,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4351 states to 4351 states and 6084 transitions. [2020-12-22 08:27:49,638 INFO L78 Accepts]: Start accepts. Automaton has 4351 states and 6084 transitions. Word has length 81 [2020-12-22 08:27:49,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:27:49,648 INFO L481 AbstractCegarLoop]: Abstraction has 4351 states and 6084 transitions. [2020-12-22 08:27:49,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:27:49,648 INFO L276 IsEmpty]: Start isEmpty. Operand 4351 states and 6084 transitions. [2020-12-22 08:27:49,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 08:27:49,661 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:27:49,661 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:27:49,661 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 08:27:49,662 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:27:49,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:27:49,663 INFO L82 PathProgramCache]: Analyzing trace with hash -861777195, now seen corresponding path program 1 times [2020-12-22 08:27:49,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:27:49,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202335434] [2020-12-22 08:27:49,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:27:49,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:27:50,078 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 08:27:50,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202335434] [2020-12-22 08:27:50,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:27:50,080 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:27:50,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008129607] [2020-12-22 08:27:50,082 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:27:50,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:27:50,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:27:50,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:27:50,084 INFO L87 Difference]: Start difference. First operand 4351 states and 6084 transitions. Second operand 3 states. [2020-12-22 08:27:50,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:27:50,461 INFO L93 Difference]: Finished difference Result 8684 states and 12574 transitions. [2020-12-22 08:27:50,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:27:50,461 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2020-12-22 08:27:50,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:27:50,499 INFO L225 Difference]: With dead ends: 8684 [2020-12-22 08:27:50,499 INFO L226 Difference]: Without dead ends: 6374 [2020-12-22 08:27:50,506 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 08:27:50,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6374 states. [2020-12-22 08:27:50,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6374 to 6372. [2020-12-22 08:27:50,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6372 states. [2020-12-22 08:27:50,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6372 states to 6372 states and 9038 transitions. [2020-12-22 08:27:50,874 INFO L78 Accepts]: Start accepts. Automaton has 6372 states and 9038 transitions. Word has length 81 [2020-12-22 08:27:50,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:27:50,874 INFO L481 AbstractCegarLoop]: Abstraction has 6372 states and 9038 transitions. [2020-12-22 08:27:50,875 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:27:50,875 INFO L276 IsEmpty]: Start isEmpty. Operand 6372 states and 9038 transitions. [2020-12-22 08:27:50,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 08:27:50,887 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:27:50,887 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:27:50,888 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 08:27:50,888 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:27:50,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:27:50,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1403577995, now seen corresponding path program 1 times [2020-12-22 08:27:50,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:27:50,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567729463] [2020-12-22 08:27:50,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:27:50,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:27:51,083 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 08:27:51,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567729463] [2020-12-22 08:27:51,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:27:51,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:27:51,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762910720] [2020-12-22 08:27:51,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:27:51,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:27:51,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:27:51,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:27:51,090 INFO L87 Difference]: Start difference. First operand 6372 states and 9038 transitions. Second operand 3 states. [2020-12-22 08:27:51,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:27:51,840 INFO L93 Difference]: Finished difference Result 13678 states and 19794 transitions. [2020-12-22 08:27:51,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:27:51,843 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2020-12-22 08:27:51,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:27:51,921 INFO L225 Difference]: With dead ends: 13678 [2020-12-22 08:27:51,921 INFO L226 Difference]: Without dead ends: 10242 [2020-12-22 08:27:51,929 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 08:27:51,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10242 states. [2020-12-22 08:27:52,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10242 to 10240. [2020-12-22 08:27:52,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10240 states. [2020-12-22 08:27:52,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10240 states to 10240 states and 14556 transitions. [2020-12-22 08:27:52,429 INFO L78 Accepts]: Start accepts. Automaton has 10240 states and 14556 transitions. Word has length 81 [2020-12-22 08:27:52,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:27:52,431 INFO L481 AbstractCegarLoop]: Abstraction has 10240 states and 14556 transitions. [2020-12-22 08:27:52,431 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:27:52,431 INFO L276 IsEmpty]: Start isEmpty. Operand 10240 states and 14556 transitions. [2020-12-22 08:27:52,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 08:27:52,453 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:27:52,453 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:27:52,453 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 08:27:52,453 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:27:52,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:27:52,454 INFO L82 PathProgramCache]: Analyzing trace with hash 620531610, now seen corresponding path program 1 times [2020-12-22 08:27:52,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:27:52,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677615922] [2020-12-22 08:27:52,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:27:52,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:27:52,617 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 08:27:52,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677615922] [2020-12-22 08:27:52,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:27:52,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:27:52,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386252973] [2020-12-22 08:27:52,619 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:27:52,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:27:52,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:27:52,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:27:52,620 INFO L87 Difference]: Start difference. First operand 10240 states and 14556 transitions. Second operand 3 states. [2020-12-22 08:27:53,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:27:53,270 INFO L93 Difference]: Finished difference Result 21442 states and 30947 transitions. [2020-12-22 08:27:53,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:27:53,271 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2020-12-22 08:27:53,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:27:53,309 INFO L225 Difference]: With dead ends: 21442 [2020-12-22 08:27:53,310 INFO L226 Difference]: Without dead ends: 14823 [2020-12-22 08:27:53,326 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 08:27:53,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14823 states. [2020-12-22 08:27:54,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14823 to 14781. [2020-12-22 08:27:54,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14781 states. [2020-12-22 08:27:54,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14781 states to 14781 states and 20949 transitions. [2020-12-22 08:27:54,063 INFO L78 Accepts]: Start accepts. Automaton has 14781 states and 20949 transitions. Word has length 81 [2020-12-22 08:27:54,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:27:54,063 INFO L481 AbstractCegarLoop]: Abstraction has 14781 states and 20949 transitions. [2020-12-22 08:27:54,064 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:27:54,064 INFO L276 IsEmpty]: Start isEmpty. Operand 14781 states and 20949 transitions. [2020-12-22 08:27:54,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 08:27:54,083 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:27:54,083 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:27:54,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 08:27:54,084 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:27:54,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:27:54,089 INFO L82 PathProgramCache]: Analyzing trace with hash 1016638879, now seen corresponding path program 1 times [2020-12-22 08:27:54,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:27:54,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386699271] [2020-12-22 08:27:54,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:27:54,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:27:54,268 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 08:27:54,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386699271] [2020-12-22 08:27:54,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:27:54,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:27:54,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119926241] [2020-12-22 08:27:54,270 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:27:54,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:27:54,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:27:54,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:27:54,271 INFO L87 Difference]: Start difference. First operand 14781 states and 20949 transitions. Second operand 5 states. [2020-12-22 08:27:56,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:27:56,267 INFO L93 Difference]: Finished difference Result 31697 states and 45273 transitions. [2020-12-22 08:27:56,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:27:56,267 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 81 [2020-12-22 08:27:56,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:27:56,315 INFO L225 Difference]: With dead ends: 31697 [2020-12-22 08:27:56,315 INFO L226 Difference]: Without dead ends: 18693 [2020-12-22 08:27:56,341 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:27:56,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18693 states. [2020-12-22 08:27:57,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18693 to 18641. [2020-12-22 08:27:57,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18641 states. [2020-12-22 08:27:57,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18641 states to 18641 states and 26318 transitions. [2020-12-22 08:27:57,219 INFO L78 Accepts]: Start accepts. Automaton has 18641 states and 26318 transitions. Word has length 81 [2020-12-22 08:27:57,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:27:57,220 INFO L481 AbstractCegarLoop]: Abstraction has 18641 states and 26318 transitions. [2020-12-22 08:27:57,220 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:27:57,220 INFO L276 IsEmpty]: Start isEmpty. Operand 18641 states and 26318 transitions. [2020-12-22 08:27:57,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 08:27:57,246 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:27:57,246 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:27:57,247 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 08:27:57,247 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:27:57,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:27:57,248 INFO L82 PathProgramCache]: Analyzing trace with hash -1891437418, now seen corresponding path program 1 times [2020-12-22 08:27:57,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:27:57,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602520381] [2020-12-22 08:27:57,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:27:57,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:27:57,442 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 08:27:57,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602520381] [2020-12-22 08:27:57,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:27:57,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:27:57,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037698586] [2020-12-22 08:27:57,444 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:27:57,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:27:57,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:27:57,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:27:57,445 INFO L87 Difference]: Start difference. First operand 18641 states and 26318 transitions. Second operand 5 states. [2020-12-22 08:27:59,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:27:59,283 INFO L93 Difference]: Finished difference Result 42316 states and 60255 transitions. [2020-12-22 08:27:59,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:27:59,283 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 81 [2020-12-22 08:27:59,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:27:59,343 INFO L225 Difference]: With dead ends: 42316 [2020-12-22 08:27:59,343 INFO L226 Difference]: Without dead ends: 24939 [2020-12-22 08:27:59,366 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:27:59,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24939 states. [2020-12-22 08:28:00,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24939 to 24862. [2020-12-22 08:28:00,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24862 states. [2020-12-22 08:28:00,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24862 states to 24862 states and 35181 transitions. [2020-12-22 08:28:00,569 INFO L78 Accepts]: Start accepts. Automaton has 24862 states and 35181 transitions. Word has length 81 [2020-12-22 08:28:00,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:28:00,570 INFO L481 AbstractCegarLoop]: Abstraction has 24862 states and 35181 transitions. [2020-12-22 08:28:00,570 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:28:00,570 INFO L276 IsEmpty]: Start isEmpty. Operand 24862 states and 35181 transitions. [2020-12-22 08:28:00,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 08:28:00,590 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:28:00,590 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:28:00,590 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 08:28:00,590 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:28:00,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:28:00,591 INFO L82 PathProgramCache]: Analyzing trace with hash 58995152, now seen corresponding path program 1 times [2020-12-22 08:28:00,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:28:00,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143312647] [2020-12-22 08:28:00,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:28:00,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:28:00,753 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 08:28:00,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143312647] [2020-12-22 08:28:00,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:28:00,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:28:00,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283663430] [2020-12-22 08:28:00,761 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:28:00,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:28:00,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:28:00,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:28:00,763 INFO L87 Difference]: Start difference. First operand 24862 states and 35181 transitions. Second operand 6 states. [2020-12-22 08:28:04,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:28:04,269 INFO L93 Difference]: Finished difference Result 86433 states and 123306 transitions. [2020-12-22 08:28:04,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:28:04,270 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 82 [2020-12-22 08:28:04,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:28:04,446 INFO L225 Difference]: With dead ends: 86433 [2020-12-22 08:28:04,446 INFO L226 Difference]: Without dead ends: 62250 [2020-12-22 08:28:04,508 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-12-22 08:28:04,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62250 states. [2020-12-22 08:28:07,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62250 to 62246. [2020-12-22 08:28:07,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62246 states. [2020-12-22 08:28:07,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62246 states to 62246 states and 88450 transitions. [2020-12-22 08:28:07,512 INFO L78 Accepts]: Start accepts. Automaton has 62246 states and 88450 transitions. Word has length 82 [2020-12-22 08:28:07,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:28:07,513 INFO L481 AbstractCegarLoop]: Abstraction has 62246 states and 88450 transitions. [2020-12-22 08:28:07,519 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:28:07,519 INFO L276 IsEmpty]: Start isEmpty. Operand 62246 states and 88450 transitions. [2020-12-22 08:28:07,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 08:28:07,549 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:28:07,550 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:28:07,550 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 08:28:07,550 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:28:07,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:28:07,551 INFO L82 PathProgramCache]: Analyzing trace with hash 261572518, now seen corresponding path program 1 times [2020-12-22 08:28:07,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:28:07,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703820404] [2020-12-22 08:28:07,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:28:07,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:28:07,674 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 08:28:07,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703820404] [2020-12-22 08:28:07,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:28:07,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:28:07,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629704325] [2020-12-22 08:28:07,675 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:28:07,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:28:07,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:28:07,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:28:07,676 INFO L87 Difference]: Start difference. First operand 62246 states and 88450 transitions. Second operand 3 states. [2020-12-22 08:28:12,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:28:12,326 INFO L93 Difference]: Finished difference Result 151310 states and 215844 transitions. [2020-12-22 08:28:12,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:28:12,327 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 83 [2020-12-22 08:28:12,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:28:12,519 INFO L225 Difference]: With dead ends: 151310 [2020-12-22 08:28:12,520 INFO L226 Difference]: Without dead ends: 93909 [2020-12-22 08:28:12,574 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 08:28:12,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93909 states. [2020-12-22 08:28:17,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93909 to 93457. [2020-12-22 08:28:17,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93457 states. [2020-12-22 08:28:17,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93457 states to 93457 states and 131598 transitions. [2020-12-22 08:28:17,435 INFO L78 Accepts]: Start accepts. Automaton has 93457 states and 131598 transitions. Word has length 83 [2020-12-22 08:28:17,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:28:17,436 INFO L481 AbstractCegarLoop]: Abstraction has 93457 states and 131598 transitions. [2020-12-22 08:28:17,436 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:28:17,436 INFO L276 IsEmpty]: Start isEmpty. Operand 93457 states and 131598 transitions. [2020-12-22 08:28:17,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-22 08:28:17,467 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:28:17,467 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:28:17,467 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 08:28:17,468 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:28:17,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:28:17,468 INFO L82 PathProgramCache]: Analyzing trace with hash 909961113, now seen corresponding path program 1 times [2020-12-22 08:28:17,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:28:17,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691978180] [2020-12-22 08:28:17,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:28:17,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:28:17,616 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 08:28:17,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691978180] [2020-12-22 08:28:17,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:28:17,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:28:17,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766454071] [2020-12-22 08:28:17,617 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 08:28:17,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:28:17,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 08:28:17,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:28:17,620 INFO L87 Difference]: Start difference. First operand 93457 states and 131598 transitions. Second operand 7 states. [2020-12-22 08:28:37,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:28:37,032 INFO L93 Difference]: Finished difference Result 380112 states and 536268 transitions. [2020-12-22 08:28:37,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 08:28:37,033 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 84 [2020-12-22 08:28:37,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:28:37,777 INFO L225 Difference]: With dead ends: 380112 [2020-12-22 08:28:37,777 INFO L226 Difference]: Without dead ends: 327002 [2020-12-22 08:28:37,907 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 08:28:38,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327002 states. [2020-12-22 08:28:46,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327002 to 93513. [2020-12-22 08:28:46,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93513 states. [2020-12-22 08:28:46,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93513 states to 93513 states and 131670 transitions. [2020-12-22 08:28:46,363 INFO L78 Accepts]: Start accepts. Automaton has 93513 states and 131670 transitions. Word has length 84 [2020-12-22 08:28:46,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:28:46,364 INFO L481 AbstractCegarLoop]: Abstraction has 93513 states and 131670 transitions. [2020-12-22 08:28:46,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 08:28:46,364 INFO L276 IsEmpty]: Start isEmpty. Operand 93513 states and 131670 transitions. [2020-12-22 08:28:46,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-22 08:28:46,388 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:28:46,388 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:28:46,388 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 08:28:46,388 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:28:46,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:28:46,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1929393516, now seen corresponding path program 1 times [2020-12-22 08:28:46,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:28:46,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703526874] [2020-12-22 08:28:46,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:28:46,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:28:46,599 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 08:28:46,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703526874] [2020-12-22 08:28:46,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:28:46,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:28:46,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763402402] [2020-12-22 08:28:46,601 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 08:28:46,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:28:46,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 08:28:46,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:28:46,602 INFO L87 Difference]: Start difference. First operand 93513 states and 131670 transitions. Second operand 7 states. [2020-12-22 08:29:16,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:29:16,016 INFO L93 Difference]: Finished difference Result 428801 states and 604512 transitions. [2020-12-22 08:29:16,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 08:29:16,017 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 84 [2020-12-22 08:29:16,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:29:16,995 INFO L225 Difference]: With dead ends: 428801 [2020-12-22 08:29:16,995 INFO L226 Difference]: Without dead ends: 378432 [2020-12-22 08:29:17,164 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 08:29:17,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378432 states. [2020-12-22 08:29:26,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378432 to 93865. [2020-12-22 08:29:26,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93865 states. [2020-12-22 08:29:27,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93865 states to 93865 states and 132148 transitions. [2020-12-22 08:29:27,201 INFO L78 Accepts]: Start accepts. Automaton has 93865 states and 132148 transitions. Word has length 84 [2020-12-22 08:29:27,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:29:27,202 INFO L481 AbstractCegarLoop]: Abstraction has 93865 states and 132148 transitions. [2020-12-22 08:29:27,202 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 08:29:27,202 INFO L276 IsEmpty]: Start isEmpty. Operand 93865 states and 132148 transitions. [2020-12-22 08:29:27,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-22 08:29:27,228 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:29:27,228 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:29:27,228 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 08:29:27,228 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:29:27,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:29:27,229 INFO L82 PathProgramCache]: Analyzing trace with hash -2043562398, now seen corresponding path program 1 times [2020-12-22 08:29:27,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:29:27,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999356201] [2020-12-22 08:29:27,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:29:27,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:29:27,396 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 08:29:27,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999356201] [2020-12-22 08:29:27,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:29:27,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:29:27,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393351532] [2020-12-22 08:29:27,397 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 08:29:27,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:29:27,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 08:29:27,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:29:27,399 INFO L87 Difference]: Start difference. First operand 93865 states and 132148 transitions. Second operand 7 states. [2020-12-22 08:30:13,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:30:13,013 INFO L93 Difference]: Finished difference Result 528384 states and 750049 transitions. [2020-12-22 08:30:13,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 08:30:13,014 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 84 [2020-12-22 08:30:13,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:30:14,251 INFO L225 Difference]: With dead ends: 528384 [2020-12-22 08:30:14,251 INFO L226 Difference]: Without dead ends: 481238 [2020-12-22 08:30:14,440 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 08:30:14,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481238 states. [2020-12-22 08:30:26,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481238 to 94001. [2020-12-22 08:30:26,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94001 states. [2020-12-22 08:30:27,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94001 states to 94001 states and 132324 transitions. [2020-12-22 08:30:27,148 INFO L78 Accepts]: Start accepts. Automaton has 94001 states and 132324 transitions. Word has length 84 [2020-12-22 08:30:27,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:30:27,148 INFO L481 AbstractCegarLoop]: Abstraction has 94001 states and 132324 transitions. [2020-12-22 08:30:27,148 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 08:30:27,148 INFO L276 IsEmpty]: Start isEmpty. Operand 94001 states and 132324 transitions. [2020-12-22 08:30:27,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-22 08:30:27,177 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:30:27,177 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:30:27,178 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 08:30:27,178 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:30:27,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:30:27,178 INFO L82 PathProgramCache]: Analyzing trace with hash 568007272, now seen corresponding path program 1 times [2020-12-22 08:30:27,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:30:27,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252743229] [2020-12-22 08:30:27,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:30:27,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:30:27,339 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 08:30:27,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252743229] [2020-12-22 08:30:27,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:30:27,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:30:27,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810192615] [2020-12-22 08:30:27,340 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 08:30:27,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:30:27,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 08:30:27,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:30:27,343 INFO L87 Difference]: Start difference. First operand 94001 states and 132324 transitions. Second operand 7 states.