/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.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 08:32:06,579 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 08:32:06,582 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 08:32:06,620 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 08:32:06,621 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 08:32:06,623 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 08:32:06,625 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 08:32:06,627 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 08:32:06,629 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 08:32:06,631 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 08:32:06,632 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 08:32:06,634 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 08:32:06,634 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 08:32:06,636 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 08:32:06,637 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 08:32:06,639 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 08:32:06,640 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 08:32:06,642 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 08:32:06,644 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 08:32:06,646 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 08:32:06,649 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 08:32:06,651 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 08:32:06,655 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 08:32:06,671 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 08:32:06,680 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 08:32:06,692 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 08:32:06,693 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 08:32:06,695 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 08:32:06,698 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 08:32:06,703 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 08:32:06,704 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 08:32:06,705 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 08:32:06,705 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 08:32:06,706 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 08:32:06,707 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 08:32:06,709 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 08:32:06,712 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 08:32:06,770 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 08:32:06,771 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 08:32:06,776 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 08:32:06,777 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 08:32:06,777 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 08:32:06,777 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 08:32:06,778 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 08:32:06,778 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 08:32:06,778 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 08:32:06,778 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 08:32:06,780 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 08:32:06,780 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 08:32:06,780 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 08:32:06,781 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 08:32:06,781 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 08:32:06,781 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 08:32:06,782 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 08:32:06,782 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 08:32:06,782 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 08:32:06,783 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 08:32:06,783 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 08:32:06,783 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 08:32:06,783 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 08:32:06,784 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 08:32:06,785 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 08:32:06,785 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 08:32:07,262 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 08:32:07,296 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 08:32:07,301 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 08:32:07,302 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 08:32:07,303 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 08:32:07,304 INFO L432 ainManager$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.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-12-22 08:32:07,399 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/628c14659/b518b19b420e4a4cb3590464c577952e/FLAGb3e22865d [2020-12-22 08:32:08,069 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 08:32:08,069 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-12-22 08:32:08,088 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/628c14659/b518b19b420e4a4cb3590464c577952e/FLAGb3e22865d [2020-12-22 08:32:08,385 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/628c14659/b518b19b420e4a4cb3590464c577952e [2020-12-22 08:32:08,389 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 08:32:08,391 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 08:32:08,393 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 08:32:08,393 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 08:32:08,397 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 08:32:08,398 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:32:08" (1/1) ... [2020-12-22 08:32:08,399 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c0def27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:32:08, skipping insertion in model container [2020-12-22 08:32:08,400 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:32:08" (1/1) ... [2020-12-22 08:32:08,408 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 08:32:08,462 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 08:32:08,742 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.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[8054,8067] [2020-12-22 08:32:08,830 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:32:08,856 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 08:32:08,966 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.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[8054,8067] [2020-12-22 08:32:09,071 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:32:09,099 INFO L208 MainTranslator]: Completed translation [2020-12-22 08:32:09,099 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:32:09 WrapperNode [2020-12-22 08:32:09,099 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 08:32:09,101 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 08:32:09,101 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 08:32:09,101 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 08:32:09,110 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:32:09" (1/1) ... [2020-12-22 08:32:09,125 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:32:09" (1/1) ... [2020-12-22 08:32:09,250 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 08:32:09,254 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 08:32:09,254 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 08:32:09,254 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 08:32:09,264 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:32:09" (1/1) ... [2020-12-22 08:32:09,264 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:32:09" (1/1) ... [2020-12-22 08:32:09,269 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:32:09" (1/1) ... [2020-12-22 08:32:09,269 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:32:09" (1/1) ... [2020-12-22 08:32:09,282 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:32:09" (1/1) ... [2020-12-22 08:32:09,291 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:32:09" (1/1) ... [2020-12-22 08:32:09,296 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:32:09" (1/1) ... [2020-12-22 08:32:09,303 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 08:32:09,305 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 08:32:09,305 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 08:32:09,305 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 08:32:09,306 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:32:09" (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 08:32:09,436 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 08:32:09,437 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 08:32:09,438 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 08:32:09,438 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 08:32:10,678 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 08:32:10,679 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 08:32:10,683 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:32:10 BoogieIcfgContainer [2020-12-22 08:32:10,683 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 08:32:10,688 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 08:32:10,690 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 08:32:10,694 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 08:32:10,697 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 08:32:08" (1/3) ... [2020-12-22 08:32:10,698 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@450aa55b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:32:10, skipping insertion in model container [2020-12-22 08:32:10,698 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:32:09" (2/3) ... [2020-12-22 08:32:10,699 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@450aa55b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:32:10, skipping insertion in model container [2020-12-22 08:32:10,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:32:10" (3/3) ... [2020-12-22 08:32:10,701 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.5.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-12-22 08:32:10,708 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 08:32:10,714 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 08:32:10,738 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 08:32:10,787 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 08:32:10,788 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 08:32:10,788 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 08:32:10,788 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 08:32:10,788 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 08:32:10,789 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 08:32:10,789 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 08:32:10,789 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 08:32:10,810 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2020-12-22 08:32:10,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 08:32:10,821 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:32:10,822 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 08:32:10,823 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:32:10,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:32:10,830 INFO L82 PathProgramCache]: Analyzing trace with hash 1949123702, now seen corresponding path program 1 times [2020-12-22 08:32:10,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:32:10,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44728094] [2020-12-22 08:32:10,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:32:11,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:32:11,295 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 08:32:11,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44728094] [2020-12-22 08:32:11,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:32:11,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:32:11,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472629734] [2020-12-22 08:32:11,303 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:32:11,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:32:11,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:32:11,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:32:11,322 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 3 states. [2020-12-22 08:32:11,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:32:11,505 INFO L93 Difference]: Finished difference Result 436 states and 718 transitions. [2020-12-22 08:32:11,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:32:11,507 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 80 [2020-12-22 08:32:11,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:32:11,547 INFO L225 Difference]: With dead ends: 436 [2020-12-22 08:32:11,548 INFO L226 Difference]: Without dead ends: 328 [2020-12-22 08:32:11,554 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 08:32:11,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2020-12-22 08:32:11,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 326. [2020-12-22 08:32:11,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 326 states. [2020-12-22 08:32:11,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 490 transitions. [2020-12-22 08:32:11,636 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 490 transitions. Word has length 80 [2020-12-22 08:32:11,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:32:11,637 INFO L481 AbstractCegarLoop]: Abstraction has 326 states and 490 transitions. [2020-12-22 08:32:11,637 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:32:11,637 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 490 transitions. [2020-12-22 08:32:11,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 08:32:11,641 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:32:11,642 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 08:32:11,642 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 08:32:11,642 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:32:11,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:32:11,643 INFO L82 PathProgramCache]: Analyzing trace with hash 13403552, now seen corresponding path program 1 times [2020-12-22 08:32:11,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:32:11,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810477791] [2020-12-22 08:32:11,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:32:11,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:32:12,133 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 08:32:12,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810477791] [2020-12-22 08:32:12,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:32:12,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 08:32:12,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988587316] [2020-12-22 08:32:12,137 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 08:32:12,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:32:12,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 08:32:12,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:32:12,139 INFO L87 Difference]: Start difference. First operand 326 states and 490 transitions. Second operand 7 states. [2020-12-22 08:32:12,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:32:12,600 INFO L93 Difference]: Finished difference Result 1412 states and 2192 transitions. [2020-12-22 08:32:12,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 08:32:12,601 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 81 [2020-12-22 08:32:12,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:32:12,609 INFO L225 Difference]: With dead ends: 1412 [2020-12-22 08:32:12,610 INFO L226 Difference]: Without dead ends: 1166 [2020-12-22 08:32:12,613 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:32:12,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1166 states. [2020-12-22 08:32:12,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1166 to 1158. [2020-12-22 08:32:12,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1158 states. [2020-12-22 08:32:12,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1158 states to 1158 states and 1791 transitions. [2020-12-22 08:32:12,721 INFO L78 Accepts]: Start accepts. Automaton has 1158 states and 1791 transitions. Word has length 81 [2020-12-22 08:32:12,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:32:12,722 INFO L481 AbstractCegarLoop]: Abstraction has 1158 states and 1791 transitions. [2020-12-22 08:32:12,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 08:32:12,722 INFO L276 IsEmpty]: Start isEmpty. Operand 1158 states and 1791 transitions. [2020-12-22 08:32:12,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 08:32:12,727 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:32:12,728 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 08:32:12,728 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 08:32:12,728 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:32:12,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:32:12,729 INFO L82 PathProgramCache]: Analyzing trace with hash 2050473049, now seen corresponding path program 1 times [2020-12-22 08:32:12,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:32:12,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521421126] [2020-12-22 08:32:12,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:32:12,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:32:12,916 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 08:32:12,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521421126] [2020-12-22 08:32:12,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:32:12,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:32:12,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992040960] [2020-12-22 08:32:12,917 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:32:12,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:32:12,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:32:12,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:32:12,919 INFO L87 Difference]: Start difference. First operand 1158 states and 1791 transitions. Second operand 6 states. [2020-12-22 08:32:13,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:32:13,448 INFO L93 Difference]: Finished difference Result 3853 states and 6046 transitions. [2020-12-22 08:32:13,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:32:13,449 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 82 [2020-12-22 08:32:13,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:32:13,467 INFO L225 Difference]: With dead ends: 3853 [2020-12-22 08:32:13,467 INFO L226 Difference]: Without dead ends: 2776 [2020-12-22 08:32:13,492 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 08:32:13,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2776 states. [2020-12-22 08:32:13,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2776 to 2772. [2020-12-22 08:32:13,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2772 states. [2020-12-22 08:32:13,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2772 states to 2772 states and 4337 transitions. [2020-12-22 08:32:13,696 INFO L78 Accepts]: Start accepts. Automaton has 2772 states and 4337 transitions. Word has length 82 [2020-12-22 08:32:13,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:32:13,697 INFO L481 AbstractCegarLoop]: Abstraction has 2772 states and 4337 transitions. [2020-12-22 08:32:13,697 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:32:13,697 INFO L276 IsEmpty]: Start isEmpty. Operand 2772 states and 4337 transitions. [2020-12-22 08:32:13,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 08:32:13,700 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:32:13,701 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 08:32:13,701 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 08:32:13,701 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:32:13,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:32:13,702 INFO L82 PathProgramCache]: Analyzing trace with hash 269412074, now seen corresponding path program 1 times [2020-12-22 08:32:13,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:32:13,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082375439] [2020-12-22 08:32:13,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:32:13,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:32:13,810 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 08:32:13,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082375439] [2020-12-22 08:32:13,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:32:13,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:32:13,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522069894] [2020-12-22 08:32:13,812 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:32:13,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:32:13,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:32:13,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:32:13,813 INFO L87 Difference]: Start difference. First operand 2772 states and 4337 transitions. Second operand 5 states. [2020-12-22 08:32:14,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:32:14,452 INFO L93 Difference]: Finished difference Result 7771 states and 12233 transitions. [2020-12-22 08:32:14,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:32:14,454 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 82 [2020-12-22 08:32:14,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:32:14,529 INFO L225 Difference]: With dead ends: 7771 [2020-12-22 08:32:14,530 INFO L226 Difference]: Without dead ends: 5110 [2020-12-22 08:32:14,539 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 08:32:14,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5110 states. [2020-12-22 08:32:14,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5110 to 5108. [2020-12-22 08:32:14,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5108 states. [2020-12-22 08:32:14,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5108 states to 5108 states and 7995 transitions. [2020-12-22 08:32:14,953 INFO L78 Accepts]: Start accepts. Automaton has 5108 states and 7995 transitions. Word has length 82 [2020-12-22 08:32:14,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:32:14,953 INFO L481 AbstractCegarLoop]: Abstraction has 5108 states and 7995 transitions. [2020-12-22 08:32:14,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:32:14,954 INFO L276 IsEmpty]: Start isEmpty. Operand 5108 states and 7995 transitions. [2020-12-22 08:32:14,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 08:32:14,957 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:32:14,957 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 08:32:14,958 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 08:32:14,958 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:32:14,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:32:14,959 INFO L82 PathProgramCache]: Analyzing trace with hash 778028859, now seen corresponding path program 1 times [2020-12-22 08:32:14,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:32:14,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300914916] [2020-12-22 08:32:14,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:32:15,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:32:15,163 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 08:32:15,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300914916] [2020-12-22 08:32:15,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:32:15,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:32:15,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342811038] [2020-12-22 08:32:15,166 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:32:15,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:32:15,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:32:15,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:32:15,169 INFO L87 Difference]: Start difference. First operand 5108 states and 7995 transitions. Second operand 5 states. [2020-12-22 08:32:16,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:32:16,088 INFO L93 Difference]: Finished difference Result 14709 states and 23134 transitions. [2020-12-22 08:32:16,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:32:16,089 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 82 [2020-12-22 08:32:16,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:32:16,147 INFO L225 Difference]: With dead ends: 14709 [2020-12-22 08:32:16,147 INFO L226 Difference]: Without dead ends: 9746 [2020-12-22 08:32:16,157 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 08:32:16,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9746 states. [2020-12-22 08:32:16,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9746 to 9744. [2020-12-22 08:32:16,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9744 states. [2020-12-22 08:32:16,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9744 states to 9744 states and 15256 transitions. [2020-12-22 08:32:17,000 INFO L78 Accepts]: Start accepts. Automaton has 9744 states and 15256 transitions. Word has length 82 [2020-12-22 08:32:17,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:32:17,001 INFO L481 AbstractCegarLoop]: Abstraction has 9744 states and 15256 transitions. [2020-12-22 08:32:17,002 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:32:17,002 INFO L276 IsEmpty]: Start isEmpty. Operand 9744 states and 15256 transitions. [2020-12-22 08:32:17,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 08:32:17,011 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:32:17,012 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 08:32:17,012 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 08:32:17,012 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:32:17,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:32:17,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1091254392, now seen corresponding path program 1 times [2020-12-22 08:32:17,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:32:17,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579728548] [2020-12-22 08:32:17,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:32:17,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:32:17,120 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 08:32:17,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579728548] [2020-12-22 08:32:17,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:32:17,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:32:17,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359997363] [2020-12-22 08:32:17,122 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:32:17,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:32:17,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:32:17,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:32:17,123 INFO L87 Difference]: Start difference. First operand 9744 states and 15256 transitions. Second operand 5 states. [2020-12-22 08:32:18,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:32:18,807 INFO L93 Difference]: Finished difference Result 28886 states and 45310 transitions. [2020-12-22 08:32:18,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:32:18,808 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 82 [2020-12-22 08:32:18,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:32:18,886 INFO L225 Difference]: With dead ends: 28886 [2020-12-22 08:32:18,886 INFO L226 Difference]: Without dead ends: 19200 [2020-12-22 08:32:18,904 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 08:32:18,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19200 states. [2020-12-22 08:32:20,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19200 to 19198. [2020-12-22 08:32:20,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19198 states. [2020-12-22 08:32:20,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19198 states to 19198 states and 29927 transitions. [2020-12-22 08:32:20,462 INFO L78 Accepts]: Start accepts. Automaton has 19198 states and 29927 transitions. Word has length 82 [2020-12-22 08:32:20,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:32:20,462 INFO L481 AbstractCegarLoop]: Abstraction has 19198 states and 29927 transitions. [2020-12-22 08:32:20,462 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:32:20,462 INFO L276 IsEmpty]: Start isEmpty. Operand 19198 states and 29927 transitions. [2020-12-22 08:32:20,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 08:32:20,468 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:32:20,468 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 08:32:20,468 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 08:32:20,469 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:32:20,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:32:20,469 INFO L82 PathProgramCache]: Analyzing trace with hash 980453495, now seen corresponding path program 1 times [2020-12-22 08:32:20,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:32:20,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816555808] [2020-12-22 08:32:20,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:32:20,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:32:20,564 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 08:32:20,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816555808] [2020-12-22 08:32:20,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:32:20,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:32:20,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665913483] [2020-12-22 08:32:20,567 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:32:20,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:32:20,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:32:20,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:32:20,574 INFO L87 Difference]: Start difference. First operand 19198 states and 29927 transitions. Second operand 6 states. [2020-12-22 08:32:24,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:32:24,151 INFO L93 Difference]: Finished difference Result 71566 states and 111476 transitions. [2020-12-22 08:32:24,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:32:24,152 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 82 [2020-12-22 08:32:24,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:32:24,314 INFO L225 Difference]: With dead ends: 71566 [2020-12-22 08:32:24,315 INFO L226 Difference]: Without dead ends: 52410 [2020-12-22 08:32:24,349 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 08:32:24,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52410 states. [2020-12-22 08:32:27,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52410 to 52406. [2020-12-22 08:32:27,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52406 states. [2020-12-22 08:32:27,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52406 states to 52406 states and 81159 transitions. [2020-12-22 08:32:27,642 INFO L78 Accepts]: Start accepts. Automaton has 52406 states and 81159 transitions. Word has length 82 [2020-12-22 08:32:27,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:32:27,642 INFO L481 AbstractCegarLoop]: Abstraction has 52406 states and 81159 transitions. [2020-12-22 08:32:27,642 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:32:27,642 INFO L276 IsEmpty]: Start isEmpty. Operand 52406 states and 81159 transitions. [2020-12-22 08:32:27,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 08:32:27,655 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:32:27,655 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 08:32:27,655 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 08:32:27,655 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:32:27,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:32:27,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1660254060, now seen corresponding path program 1 times [2020-12-22 08:32:27,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:32:27,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146042380] [2020-12-22 08:32:27,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:32:27,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:32:27,763 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 08:32:27,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146042380] [2020-12-22 08:32:27,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:32:27,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:32:27,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609010489] [2020-12-22 08:32:27,765 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:32:27,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:32:27,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:32:27,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:32:27,766 INFO L87 Difference]: Start difference. First operand 52406 states and 81159 transitions. Second operand 5 states. [2020-12-22 08:32:32,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:32:32,588 INFO L93 Difference]: Finished difference Result 98736 states and 152128 transitions. [2020-12-22 08:32:32,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:32:32,588 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 83 [2020-12-22 08:32:32,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:32:32,918 INFO L225 Difference]: With dead ends: 98736 [2020-12-22 08:32:32,918 INFO L226 Difference]: Without dead ends: 98734 [2020-12-22 08:32:32,975 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:32:33,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98734 states. [2020-12-22 08:32:36,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98734 to 53078. [2020-12-22 08:32:36,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53078 states. [2020-12-22 08:32:36,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53078 states to 53078 states and 81831 transitions. [2020-12-22 08:32:36,705 INFO L78 Accepts]: Start accepts. Automaton has 53078 states and 81831 transitions. Word has length 83 [2020-12-22 08:32:36,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:32:36,705 INFO L481 AbstractCegarLoop]: Abstraction has 53078 states and 81831 transitions. [2020-12-22 08:32:36,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:32:36,705 INFO L276 IsEmpty]: Start isEmpty. Operand 53078 states and 81831 transitions. [2020-12-22 08:32:36,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-22 08:32:36,719 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:32:36,719 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 08:32:36,720 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 08:32:36,720 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:32:36,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:32:36,721 INFO L82 PathProgramCache]: Analyzing trace with hash 207675476, now seen corresponding path program 1 times [2020-12-22 08:32:36,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:32:36,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322772540] [2020-12-22 08:32:36,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:32:36,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:32:37,009 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 08:32:37,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322772540] [2020-12-22 08:32:37,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:32:37,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 08:32:37,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758840222] [2020-12-22 08:32:37,011 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 08:32:37,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:32:37,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 08:32:37,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-12-22 08:32:37,013 INFO L87 Difference]: Start difference. First operand 53078 states and 81831 transitions. Second operand 10 states. [2020-12-22 08:33:02,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:33:02,493 INFO L93 Difference]: Finished difference Result 414855 states and 639286 transitions. [2020-12-22 08:33:02,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-22 08:33:02,494 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 84 [2020-12-22 08:33:02,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:33:03,640 INFO L225 Difference]: With dead ends: 414855 [2020-12-22 08:33:03,640 INFO L226 Difference]: Without dead ends: 383071 [2020-12-22 08:33:03,812 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=380, Invalid=1180, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 08:33:04,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383071 states. [2020-12-22 08:33:11,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383071 to 53573. [2020-12-22 08:33:11,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53573 states. [2020-12-22 08:33:11,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53573 states to 53573 states and 82476 transitions. [2020-12-22 08:33:11,214 INFO L78 Accepts]: Start accepts. Automaton has 53573 states and 82476 transitions. Word has length 84 [2020-12-22 08:33:11,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:33:11,214 INFO L481 AbstractCegarLoop]: Abstraction has 53573 states and 82476 transitions. [2020-12-22 08:33:11,214 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 08:33:11,215 INFO L276 IsEmpty]: Start isEmpty. Operand 53573 states and 82476 transitions. [2020-12-22 08:33:11,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-22 08:33:11,226 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:33:11,226 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 08:33:11,227 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 08:33:11,227 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:33:11,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:33:11,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1543265332, now seen corresponding path program 1 times [2020-12-22 08:33:11,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:33:11,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104824845] [2020-12-22 08:33:11,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:33:11,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:33:11,449 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 08:33:11,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104824845] [2020-12-22 08:33:11,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:33:11,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 08:33:11,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691799564] [2020-12-22 08:33:11,451 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 08:33:11,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:33:11,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 08:33:11,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 08:33:11,452 INFO L87 Difference]: Start difference. First operand 53573 states and 82476 transitions. Second operand 10 states. [2020-12-22 08:33:28,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:33:28,081 INFO L93 Difference]: Finished difference Result 178775 states and 271878 transitions. [2020-12-22 08:33:28,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-22 08:33:28,082 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 84 [2020-12-22 08:33:28,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:33:28,357 INFO L225 Difference]: With dead ends: 178775 [2020-12-22 08:33:28,358 INFO L226 Difference]: Without dead ends: 160341 [2020-12-22 08:33:28,406 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=247, Invalid=683, Unknown=0, NotChecked=0, Total=930 [2020-12-22 08:33:28,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160341 states. [2020-12-22 08:33:34,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160341 to 54587. [2020-12-22 08:33:34,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54587 states. [2020-12-22 08:33:34,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54587 states to 54587 states and 83920 transitions. [2020-12-22 08:33:34,527 INFO L78 Accepts]: Start accepts. Automaton has 54587 states and 83920 transitions. Word has length 84 [2020-12-22 08:33:34,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:33:34,527 INFO L481 AbstractCegarLoop]: Abstraction has 54587 states and 83920 transitions. [2020-12-22 08:33:34,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 08:33:34,528 INFO L276 IsEmpty]: Start isEmpty. Operand 54587 states and 83920 transitions. [2020-12-22 08:33:34,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-22 08:33:34,543 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:33:34,543 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 08:33:34,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 08:33:34,544 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:33:34,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:33:34,544 INFO L82 PathProgramCache]: Analyzing trace with hash 940384276, now seen corresponding path program 1 times [2020-12-22 08:33:34,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:33:34,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254694605] [2020-12-22 08:33:34,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:33:34,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:33:34,964 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 08:33:34,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254694605] [2020-12-22 08:33:34,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:33:34,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 08:33:34,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847259071] [2020-12-22 08:33:34,965 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 08:33:34,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:33:34,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 08:33:34,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-12-22 08:33:34,967 INFO L87 Difference]: Start difference. First operand 54587 states and 83920 transitions. Second operand 10 states. [2020-12-22 08:34:03,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:34:03,764 INFO L93 Difference]: Finished difference Result 285718 states and 437567 transitions. [2020-12-22 08:34:03,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 08:34:03,765 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 84 [2020-12-22 08:34:03,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:34:04,332 INFO L225 Difference]: With dead ends: 285718 [2020-12-22 08:34:04,333 INFO L226 Difference]: Without dead ends: 279042 [2020-12-22 08:34:04,404 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=236, Invalid=694, Unknown=0, NotChecked=0, Total=930 [2020-12-22 08:34:04,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279042 states. [2020-12-22 08:34:12,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279042 to 54587. [2020-12-22 08:34:12,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54587 states. [2020-12-22 08:34:12,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54587 states to 54587 states and 83916 transitions. [2020-12-22 08:34:12,167 INFO L78 Accepts]: Start accepts. Automaton has 54587 states and 83916 transitions. Word has length 84 [2020-12-22 08:34:12,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:34:12,167 INFO L481 AbstractCegarLoop]: Abstraction has 54587 states and 83916 transitions. [2020-12-22 08:34:12,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 08:34:12,167 INFO L276 IsEmpty]: Start isEmpty. Operand 54587 states and 83916 transitions. [2020-12-22 08:34:12,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-22 08:34:12,178 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:34:12,178 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 08:34:12,178 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 08:34:12,179 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:34:12,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:34:12,179 INFO L82 PathProgramCache]: Analyzing trace with hash -43340684, now seen corresponding path program 1 times [2020-12-22 08:34:12,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:34:12,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974005125] [2020-12-22 08:34:12,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:34:12,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:34:12,408 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 08:34:12,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974005125] [2020-12-22 08:34:12,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:34:12,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 08:34:12,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771932783] [2020-12-22 08:34:12,410 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 08:34:12,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:34:12,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 08:34:12,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 08:34:12,411 INFO L87 Difference]: Start difference. First operand 54587 states and 83916 transitions. Second operand 10 states. [2020-12-22 08:34:41,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:34:41,626 INFO L93 Difference]: Finished difference Result 267347 states and 407354 transitions. [2020-12-22 08:34:41,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 08:34:41,627 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 84 [2020-12-22 08:34:41,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:34:42,040 INFO L225 Difference]: With dead ends: 267347 [2020-12-22 08:34:42,040 INFO L226 Difference]: Without dead ends: 226367 [2020-12-22 08:34:42,118 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=219, Invalid=593, Unknown=0, NotChecked=0, Total=812 [2020-12-22 08:34:42,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226367 states. [2020-12-22 08:34:50,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226367 to 55117. [2020-12-22 08:34:50,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55117 states. [2020-12-22 08:34:50,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55117 states to 55117 states and 84597 transitions. [2020-12-22 08:34:50,810 INFO L78 Accepts]: Start accepts. Automaton has 55117 states and 84597 transitions. Word has length 84 [2020-12-22 08:34:50,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:34:50,811 INFO L481 AbstractCegarLoop]: Abstraction has 55117 states and 84597 transitions. [2020-12-22 08:34:50,811 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 08:34:50,811 INFO L276 IsEmpty]: Start isEmpty. Operand 55117 states and 84597 transitions. [2020-12-22 08:34:50,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-22 08:34:50,822 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:34:50,823 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 08:34:50,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 08:34:50,823 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:34:50,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:34:50,824 INFO L82 PathProgramCache]: Analyzing trace with hash 558481556, now seen corresponding path program 1 times [2020-12-22 08:34:50,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:34:50,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375354284] [2020-12-22 08:34:50,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:34:50,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:34:51,059 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 08:34:51,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375354284] [2020-12-22 08:34:51,059 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:34:51,059 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 08:34:51,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857885116] [2020-12-22 08:34:51,060 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 08:34:51,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:34:51,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 08:34:51,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-12-22 08:34:51,061 INFO L87 Difference]: Start difference. First operand 55117 states and 84597 transitions. Second operand 10 states. [2020-12-22 08:35:20,785 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 18 [2020-12-22 08:35:38,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:35:38,496 INFO L93 Difference]: Finished difference Result 364778 states and 560547 transitions. [2020-12-22 08:35:38,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 08:35:38,496 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 84 [2020-12-22 08:35:38,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:35:39,325 INFO L225 Difference]: With dead ends: 364778 [2020-12-22 08:35:39,326 INFO L226 Difference]: Without dead ends: 311881 [2020-12-22 08:35:39,477 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=391, Invalid=1249, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 08:35:39,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311881 states. [2020-12-22 08:35:49,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311881 to 55521. [2020-12-22 08:35:49,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55521 states. [2020-12-22 08:35:49,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55521 states to 55521 states and 85053 transitions. [2020-12-22 08:35:49,932 INFO L78 Accepts]: Start accepts. Automaton has 55521 states and 85053 transitions. Word has length 84 [2020-12-22 08:35:49,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:35:49,933 INFO L481 AbstractCegarLoop]: Abstraction has 55521 states and 85053 transitions. [2020-12-22 08:35:49,933 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 08:35:49,933 INFO L276 IsEmpty]: Start isEmpty. Operand 55521 states and 85053 transitions. [2020-12-22 08:35:49,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-12-22 08:35:49,945 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:35:49,945 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:35:49,945 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 08:35:49,946 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:35:49,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:35:49,946 INFO L82 PathProgramCache]: Analyzing trace with hash -809169967, now seen corresponding path program 1 times [2020-12-22 08:35:49,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:35:49,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066971657] [2020-12-22 08:35:49,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:35:49,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:35:50,016 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 08:35:50,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066971657] [2020-12-22 08:35:50,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:35:50,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:35:50,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038711245] [2020-12-22 08:35:50,018 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:35:50,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:35:50,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:35:50,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:35:50,019 INFO L87 Difference]: Start difference. First operand 55521 states and 85053 transitions. Second operand 3 states. [2020-12-22 08:36:00,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:36:00,439 INFO L93 Difference]: Finished difference Result 89761 states and 137723 transitions. [2020-12-22 08:36:00,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:36:00,439 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 85 [2020-12-22 08:36:00,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:36:00,652 INFO L225 Difference]: With dead ends: 89761 [2020-12-22 08:36:00,652 INFO L226 Difference]: Without dead ends: 65271 [2020-12-22 08:36:00,679 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 08:36:00,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65271 states.