/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/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 07:43:00,268 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 07:43:00,271 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 07:43:00,307 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 07:43:00,308 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 07:43:00,310 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 07:43:00,312 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 07:43:00,315 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 07:43:00,317 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 07:43:00,318 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 07:43:00,319 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 07:43:00,321 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 07:43:00,322 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 07:43:00,323 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 07:43:00,325 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 07:43:00,327 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 07:43:00,329 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 07:43:00,331 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 07:43:00,333 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 07:43:00,336 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 07:43:00,338 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 07:43:00,343 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 07:43:00,347 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 07:43:00,348 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 07:43:00,356 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 07:43:00,368 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 07:43:00,369 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 07:43:00,370 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 07:43:00,371 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 07:43:00,374 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 07:43:00,374 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 07:43:00,391 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 07:43:00,392 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 07:43:00,392 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 07:43:00,393 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 07:43:00,394 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 07:43:00,395 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 07:43:00,454 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 07:43:00,454 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 07:43:00,459 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 07:43:00,459 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 07:43:00,459 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 07:43:00,460 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 07:43:00,460 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 07:43:00,460 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 07:43:00,460 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 07:43:00,460 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 07:43:00,461 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 07:43:00,462 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 07:43:00,462 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 07:43:00,462 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 07:43:00,462 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 07:43:00,463 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 07:43:00,463 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 07:43:00,463 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:43:00,463 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 07:43:00,463 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 07:43:00,464 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 07:43:00,464 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 07:43:00,464 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 07:43:00,464 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 07:43:00,465 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 07:43:00,465 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 07:43:00,864 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 07:43:00,895 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 07:43:00,898 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 07:43:00,899 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 07:43:00,900 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 07:43:00,901 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c [2020-12-22 07:43:01,013 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed54f4fee/182e2caf028d42c99867044b2052d0f8/FLAG23c1f8631 [2020-12-22 07:43:01,712 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 07:43:01,712 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c [2020-12-22 07:43:01,733 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed54f4fee/182e2caf028d42c99867044b2052d0f8/FLAG23c1f8631 [2020-12-22 07:43:01,988 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed54f4fee/182e2caf028d42c99867044b2052d0f8 [2020-12-22 07:43:01,991 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 07:43:01,994 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 07:43:01,995 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 07:43:01,996 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 07:43:02,003 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 07:43:02,004 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:43:01" (1/1) ... [2020-12-22 07:43:02,006 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@416e77b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:43:02, skipping insertion in model container [2020-12-22 07:43:02,006 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:43:01" (1/1) ... [2020-12-22 07:43:02,016 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 07:43:02,090 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 07:43:02,445 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/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c[30998,31011] [2020-12-22 07:43:02,455 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:43:02,479 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 07:43:02,626 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/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c[30998,31011] [2020-12-22 07:43:02,630 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:43:02,672 INFO L208 MainTranslator]: Completed translation [2020-12-22 07:43:02,673 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:43:02 WrapperNode [2020-12-22 07:43:02,673 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 07:43:02,676 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 07:43:02,677 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 07:43:02,677 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 07:43:02,686 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:43:02" (1/1) ... [2020-12-22 07:43:02,725 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:43:02" (1/1) ... [2020-12-22 07:43:02,840 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 07:43:02,841 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 07:43:02,843 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 07:43:02,844 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 07:43:02,855 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:43:02" (1/1) ... [2020-12-22 07:43:02,856 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:43:02" (1/1) ... [2020-12-22 07:43:02,865 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:43:02" (1/1) ... [2020-12-22 07:43:02,865 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:43:02" (1/1) ... [2020-12-22 07:43:02,893 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:43:02" (1/1) ... [2020-12-22 07:43:02,925 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:43:02" (1/1) ... [2020-12-22 07:43:02,934 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:43:02" (1/1) ... [2020-12-22 07:43:02,942 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 07:43:02,943 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 07:43:02,943 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 07:43:02,943 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 07:43:02,944 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:43:02" (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 07:43:03,049 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 07:43:03,050 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 07:43:03,050 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 07:43:03,050 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 07:43:04,731 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 07:43:04,732 INFO L299 CfgBuilder]: Removed 21 assume(true) statements. [2020-12-22 07:43:04,734 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:43:04 BoogieIcfgContainer [2020-12-22 07:43:04,734 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 07:43:04,736 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 07:43:04,736 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 07:43:04,740 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 07:43:04,741 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:43:01" (1/3) ... [2020-12-22 07:43:04,742 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@630b29af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:43:04, skipping insertion in model container [2020-12-22 07:43:04,742 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:43:02" (2/3) ... [2020-12-22 07:43:04,742 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@630b29af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:43:04, skipping insertion in model container [2020-12-22 07:43:04,742 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:43:04" (3/3) ... [2020-12-22 07:43:04,744 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c [2020-12-22 07:43:04,752 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 07:43:04,758 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 07:43:04,779 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 07:43:04,812 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 07:43:04,812 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 07:43:04,812 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 07:43:04,812 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 07:43:04,812 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 07:43:04,812 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 07:43:04,813 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 07:43:04,813 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 07:43:04,837 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states. [2020-12-22 07:43:04,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 07:43:04,853 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:43:04,854 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:43:04,855 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:43:04,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:43:04,862 INFO L82 PathProgramCache]: Analyzing trace with hash 1105173396, now seen corresponding path program 1 times [2020-12-22 07:43:04,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:43:04,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040104610] [2020-12-22 07:43:04,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:43:05,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:43:05,338 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 07:43:05,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040104610] [2020-12-22 07:43:05,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:43:05,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:43:05,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784805436] [2020-12-22 07:43:05,346 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 07:43:05,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:43:05,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 07:43:05,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:43:05,364 INFO L87 Difference]: Start difference. First operand 324 states. Second operand 2 states. [2020-12-22 07:43:05,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:43:05,414 INFO L93 Difference]: Finished difference Result 453 states and 802 transitions. [2020-12-22 07:43:05,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 07:43:05,416 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 77 [2020-12-22 07:43:05,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:43:05,434 INFO L225 Difference]: With dead ends: 453 [2020-12-22 07:43:05,434 INFO L226 Difference]: Without dead ends: 320 [2020-12-22 07:43:05,439 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:43:05,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2020-12-22 07:43:05,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 320. [2020-12-22 07:43:05,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 320 states. [2020-12-22 07:43:05,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 575 transitions. [2020-12-22 07:43:05,511 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 575 transitions. Word has length 77 [2020-12-22 07:43:05,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:43:05,512 INFO L481 AbstractCegarLoop]: Abstraction has 320 states and 575 transitions. [2020-12-22 07:43:05,512 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 07:43:05,512 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 575 transitions. [2020-12-22 07:43:05,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 07:43:05,518 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:43:05,519 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:43:05,519 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 07:43:05,519 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:43:05,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:43:05,520 INFO L82 PathProgramCache]: Analyzing trace with hash 971159890, now seen corresponding path program 1 times [2020-12-22 07:43:05,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:43:05,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30495698] [2020-12-22 07:43:05,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:43:05,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:43:05,720 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 07:43:05,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30495698] [2020-12-22 07:43:05,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:43:05,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:43:05,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768042815] [2020-12-22 07:43:05,724 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:43:05,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:43:05,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:43:05,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:43:05,726 INFO L87 Difference]: Start difference. First operand 320 states and 575 transitions. Second operand 5 states. [2020-12-22 07:43:05,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:43:05,915 INFO L93 Difference]: Finished difference Result 448 states and 792 transitions. [2020-12-22 07:43:05,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 07:43:05,916 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 77 [2020-12-22 07:43:05,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:43:05,920 INFO L225 Difference]: With dead ends: 448 [2020-12-22 07:43:05,921 INFO L226 Difference]: Without dead ends: 320 [2020-12-22 07:43:05,923 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:43:05,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2020-12-22 07:43:05,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 320. [2020-12-22 07:43:05,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 320 states. [2020-12-22 07:43:05,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 529 transitions. [2020-12-22 07:43:05,964 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 529 transitions. Word has length 77 [2020-12-22 07:43:05,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:43:05,966 INFO L481 AbstractCegarLoop]: Abstraction has 320 states and 529 transitions. [2020-12-22 07:43:05,966 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:43:05,966 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 529 transitions. [2020-12-22 07:43:05,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-12-22 07:43:05,975 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:43:05,975 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:43:05,977 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 07:43:05,977 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:43:05,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:43:05,980 INFO L82 PathProgramCache]: Analyzing trace with hash 750751880, now seen corresponding path program 1 times [2020-12-22 07:43:05,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:43:05,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41107542] [2020-12-22 07:43:05,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:43:06,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:43:06,166 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 07:43:06,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41107542] [2020-12-22 07:43:06,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:43:06,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:43:06,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351057424] [2020-12-22 07:43:06,169 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:43:06,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:43:06,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:43:06,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:43:06,181 INFO L87 Difference]: Start difference. First operand 320 states and 529 transitions. Second operand 3 states. [2020-12-22 07:43:06,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:43:06,253 INFO L93 Difference]: Finished difference Result 556 states and 933 transitions. [2020-12-22 07:43:06,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:43:06,254 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 122 [2020-12-22 07:43:06,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:43:06,258 INFO L225 Difference]: With dead ends: 556 [2020-12-22 07:43:06,258 INFO L226 Difference]: Without dead ends: 432 [2020-12-22 07:43:06,259 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 07:43:06,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2020-12-22 07:43:06,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 430. [2020-12-22 07:43:06,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 430 states. [2020-12-22 07:43:06,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 714 transitions. [2020-12-22 07:43:06,278 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 714 transitions. Word has length 122 [2020-12-22 07:43:06,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:43:06,278 INFO L481 AbstractCegarLoop]: Abstraction has 430 states and 714 transitions. [2020-12-22 07:43:06,279 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:43:06,279 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 714 transitions. [2020-12-22 07:43:06,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-12-22 07:43:06,281 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:43:06,281 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:43:06,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 07:43:06,281 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:43:06,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:43:06,282 INFO L82 PathProgramCache]: Analyzing trace with hash -44233893, now seen corresponding path program 1 times [2020-12-22 07:43:06,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:43:06,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89216195] [2020-12-22 07:43:06,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:43:06,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:43:06,486 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 07:43:06,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89216195] [2020-12-22 07:43:06,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:43:06,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:43:06,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271663541] [2020-12-22 07:43:06,489 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:43:06,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:43:06,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:43:06,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:43:06,492 INFO L87 Difference]: Start difference. First operand 430 states and 714 transitions. Second operand 3 states. [2020-12-22 07:43:06,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:43:06,550 INFO L93 Difference]: Finished difference Result 878 states and 1474 transitions. [2020-12-22 07:43:06,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:43:06,551 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 125 [2020-12-22 07:43:06,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:43:06,558 INFO L225 Difference]: With dead ends: 878 [2020-12-22 07:43:06,558 INFO L226 Difference]: Without dead ends: 644 [2020-12-22 07:43:06,560 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 07:43:06,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2020-12-22 07:43:06,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 642. [2020-12-22 07:43:06,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 642 states. [2020-12-22 07:43:06,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 1073 transitions. [2020-12-22 07:43:06,604 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 1073 transitions. Word has length 125 [2020-12-22 07:43:06,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:43:06,606 INFO L481 AbstractCegarLoop]: Abstraction has 642 states and 1073 transitions. [2020-12-22 07:43:06,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:43:06,606 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 1073 transitions. [2020-12-22 07:43:06,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-12-22 07:43:06,609 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:43:06,610 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:43:06,610 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 07:43:06,610 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:43:06,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:43:06,611 INFO L82 PathProgramCache]: Analyzing trace with hash 487395088, now seen corresponding path program 1 times [2020-12-22 07:43:06,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:43:06,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591555954] [2020-12-22 07:43:06,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:43:06,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:43:06,811 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 07:43:06,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591555954] [2020-12-22 07:43:06,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:43:06,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:43:06,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110958614] [2020-12-22 07:43:06,812 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:43:06,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:43:06,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:43:06,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:43:06,814 INFO L87 Difference]: Start difference. First operand 642 states and 1073 transitions. Second operand 3 states. [2020-12-22 07:43:06,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:43:06,858 INFO L93 Difference]: Finished difference Result 1494 states and 2515 transitions. [2020-12-22 07:43:06,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:43:06,859 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 128 [2020-12-22 07:43:06,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:43:06,865 INFO L225 Difference]: With dead ends: 1494 [2020-12-22 07:43:06,866 INFO L226 Difference]: Without dead ends: 1048 [2020-12-22 07:43:06,867 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 07:43:06,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1048 states. [2020-12-22 07:43:06,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1048 to 1046. [2020-12-22 07:43:06,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1046 states. [2020-12-22 07:43:06,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1046 states to 1046 states and 1753 transitions. [2020-12-22 07:43:06,901 INFO L78 Accepts]: Start accepts. Automaton has 1046 states and 1753 transitions. Word has length 128 [2020-12-22 07:43:06,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:43:06,901 INFO L481 AbstractCegarLoop]: Abstraction has 1046 states and 1753 transitions. [2020-12-22 07:43:06,901 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:43:06,901 INFO L276 IsEmpty]: Start isEmpty. Operand 1046 states and 1753 transitions. [2020-12-22 07:43:06,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-12-22 07:43:06,904 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:43:06,904 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:43:06,904 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 07:43:06,905 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:43:06,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:43:06,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1255785821, now seen corresponding path program 1 times [2020-12-22 07:43:06,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:43:06,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107458225] [2020-12-22 07:43:06,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:43:06,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:43:07,042 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 07:43:07,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107458225] [2020-12-22 07:43:07,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:43:07,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:43:07,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791933240] [2020-12-22 07:43:07,043 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:43:07,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:43:07,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:43:07,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:43:07,045 INFO L87 Difference]: Start difference. First operand 1046 states and 1753 transitions. Second operand 3 states. [2020-12-22 07:43:07,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:43:07,099 INFO L93 Difference]: Finished difference Result 2666 states and 4483 transitions. [2020-12-22 07:43:07,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:43:07,100 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 131 [2020-12-22 07:43:07,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:43:07,111 INFO L225 Difference]: With dead ends: 2666 [2020-12-22 07:43:07,111 INFO L226 Difference]: Without dead ends: 1816 [2020-12-22 07:43:07,113 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 07:43:07,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1816 states. [2020-12-22 07:43:07,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1816 to 1814. [2020-12-22 07:43:07,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1814 states. [2020-12-22 07:43:07,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1814 states to 1814 states and 3037 transitions. [2020-12-22 07:43:07,168 INFO L78 Accepts]: Start accepts. Automaton has 1814 states and 3037 transitions. Word has length 131 [2020-12-22 07:43:07,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:43:07,168 INFO L481 AbstractCegarLoop]: Abstraction has 1814 states and 3037 transitions. [2020-12-22 07:43:07,168 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:43:07,168 INFO L276 IsEmpty]: Start isEmpty. Operand 1814 states and 3037 transitions. [2020-12-22 07:43:07,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-12-22 07:43:07,171 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:43:07,172 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:43:07,172 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 07:43:07,172 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:43:07,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:43:07,173 INFO L82 PathProgramCache]: Analyzing trace with hash 871480728, now seen corresponding path program 1 times [2020-12-22 07:43:07,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:43:07,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011215064] [2020-12-22 07:43:07,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:43:07,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:43:07,511 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 07:43:07,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011215064] [2020-12-22 07:43:07,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:43:07,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 07:43:07,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922381664] [2020-12-22 07:43:07,514 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 07:43:07,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:43:07,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 07:43:07,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:43:07,515 INFO L87 Difference]: Start difference. First operand 1814 states and 3037 transitions. Second operand 6 states. [2020-12-22 07:43:07,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:43:07,937 INFO L93 Difference]: Finished difference Result 6792 states and 11478 transitions. [2020-12-22 07:43:07,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:43:07,940 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 134 [2020-12-22 07:43:07,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:43:07,980 INFO L225 Difference]: With dead ends: 6792 [2020-12-22 07:43:07,980 INFO L226 Difference]: Without dead ends: 5174 [2020-12-22 07:43:07,990 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:43:07,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5174 states. [2020-12-22 07:43:08,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5174 to 3322. [2020-12-22 07:43:08,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3322 states. [2020-12-22 07:43:08,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3322 states to 3322 states and 5570 transitions. [2020-12-22 07:43:08,171 INFO L78 Accepts]: Start accepts. Automaton has 3322 states and 5570 transitions. Word has length 134 [2020-12-22 07:43:08,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:43:08,172 INFO L481 AbstractCegarLoop]: Abstraction has 3322 states and 5570 transitions. [2020-12-22 07:43:08,172 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 07:43:08,173 INFO L276 IsEmpty]: Start isEmpty. Operand 3322 states and 5570 transitions. [2020-12-22 07:43:08,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-22 07:43:08,177 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:43:08,178 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:43:08,178 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 07:43:08,178 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:43:08,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:43:08,179 INFO L82 PathProgramCache]: Analyzing trace with hash -848507773, now seen corresponding path program 1 times [2020-12-22 07:43:08,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:43:08,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312460429] [2020-12-22 07:43:08,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:43:08,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:43:08,441 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 07:43:08,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312460429] [2020-12-22 07:43:08,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:43:08,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:43:08,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217500461] [2020-12-22 07:43:08,442 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:43:08,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:43:08,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:43:08,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:43:08,443 INFO L87 Difference]: Start difference. First operand 3322 states and 5570 transitions. Second operand 4 states. [2020-12-22 07:43:08,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:43:08,725 INFO L93 Difference]: Finished difference Result 9784 states and 16511 transitions. [2020-12-22 07:43:08,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:43:08,725 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 135 [2020-12-22 07:43:08,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:43:08,769 INFO L225 Difference]: With dead ends: 9784 [2020-12-22 07:43:08,769 INFO L226 Difference]: Without dead ends: 6658 [2020-12-22 07:43:08,777 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:43:08,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6658 states. [2020-12-22 07:43:08,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6658 to 4927. [2020-12-22 07:43:08,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4927 states. [2020-12-22 07:43:09,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4927 states to 4927 states and 8275 transitions. [2020-12-22 07:43:09,017 INFO L78 Accepts]: Start accepts. Automaton has 4927 states and 8275 transitions. Word has length 135 [2020-12-22 07:43:09,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:43:09,017 INFO L481 AbstractCegarLoop]: Abstraction has 4927 states and 8275 transitions. [2020-12-22 07:43:09,017 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:43:09,017 INFO L276 IsEmpty]: Start isEmpty. Operand 4927 states and 8275 transitions. [2020-12-22 07:43:09,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-12-22 07:43:09,022 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:43:09,022 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:43:09,023 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 07:43:09,023 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:43:09,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:43:09,024 INFO L82 PathProgramCache]: Analyzing trace with hash 942022462, now seen corresponding path program 1 times [2020-12-22 07:43:09,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:43:09,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298070649] [2020-12-22 07:43:09,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:43:09,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:43:09,127 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 07:43:09,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298070649] [2020-12-22 07:43:09,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:43:09,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:43:09,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66131975] [2020-12-22 07:43:09,134 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:43:09,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:43:09,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:43:09,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:43:09,139 INFO L87 Difference]: Start difference. First operand 4927 states and 8275 transitions. Second operand 3 states. [2020-12-22 07:43:09,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:43:09,360 INFO L93 Difference]: Finished difference Result 9527 states and 16015 transitions. [2020-12-22 07:43:09,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:43:09,360 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 136 [2020-12-22 07:43:09,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:43:09,424 INFO L225 Difference]: With dead ends: 9527 [2020-12-22 07:43:09,424 INFO L226 Difference]: Without dead ends: 6957 [2020-12-22 07:43:09,430 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 07:43:09,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6957 states. [2020-12-22 07:43:09,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6957 to 6955. [2020-12-22 07:43:09,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6955 states. [2020-12-22 07:43:09,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6955 states to 6955 states and 11641 transitions. [2020-12-22 07:43:09,685 INFO L78 Accepts]: Start accepts. Automaton has 6955 states and 11641 transitions. Word has length 136 [2020-12-22 07:43:09,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:43:09,686 INFO L481 AbstractCegarLoop]: Abstraction has 6955 states and 11641 transitions. [2020-12-22 07:43:09,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:43:09,686 INFO L276 IsEmpty]: Start isEmpty. Operand 6955 states and 11641 transitions. [2020-12-22 07:43:09,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-12-22 07:43:09,689 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:43:09,689 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:43:09,689 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 07:43:09,690 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:43:09,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:43:09,690 INFO L82 PathProgramCache]: Analyzing trace with hash -506487182, now seen corresponding path program 1 times [2020-12-22 07:43:09,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:43:09,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348264846] [2020-12-22 07:43:09,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:43:09,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:43:09,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:43:09,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348264846] [2020-12-22 07:43:09,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:43:09,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:43:09,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869479544] [2020-12-22 07:43:09,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:43:09,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:43:09,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:43:09,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:43:09,798 INFO L87 Difference]: Start difference. First operand 6955 states and 11641 transitions. Second operand 3 states. [2020-12-22 07:43:10,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:43:10,114 INFO L93 Difference]: Finished difference Result 13407 states and 22463 transitions. [2020-12-22 07:43:10,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:43:10,117 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 136 [2020-12-22 07:43:10,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:43:10,145 INFO L225 Difference]: With dead ends: 13407 [2020-12-22 07:43:10,146 INFO L226 Difference]: Without dead ends: 9781 [2020-12-22 07:43:10,155 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 07:43:10,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9781 states. [2020-12-22 07:43:10,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9781 to 9779. [2020-12-22 07:43:10,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9779 states. [2020-12-22 07:43:10,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9779 states to 9779 states and 16307 transitions. [2020-12-22 07:43:10,524 INFO L78 Accepts]: Start accepts. Automaton has 9779 states and 16307 transitions. Word has length 136 [2020-12-22 07:43:10,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:43:10,524 INFO L481 AbstractCegarLoop]: Abstraction has 9779 states and 16307 transitions. [2020-12-22 07:43:10,524 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:43:10,524 INFO L276 IsEmpty]: Start isEmpty. Operand 9779 states and 16307 transitions. [2020-12-22 07:43:10,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-12-22 07:43:10,527 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:43:10,527 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:43:10,527 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 07:43:10,528 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:43:10,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:43:10,528 INFO L82 PathProgramCache]: Analyzing trace with hash -2094526018, now seen corresponding path program 1 times [2020-12-22 07:43:10,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:43:10,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217822230] [2020-12-22 07:43:10,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:43:10,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:43:10,691 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 07:43:10,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217822230] [2020-12-22 07:43:10,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:43:10,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:43:10,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137351426] [2020-12-22 07:43:10,692 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:43:10,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:43:10,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:43:10,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:43:10,693 INFO L87 Difference]: Start difference. First operand 9779 states and 16307 transitions. Second operand 3 states. [2020-12-22 07:43:10,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:43:10,970 INFO L93 Difference]: Finished difference Result 18739 states and 31281 transitions. [2020-12-22 07:43:10,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:43:10,971 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 136 [2020-12-22 07:43:10,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:43:11,006 INFO L225 Difference]: With dead ends: 18739 [2020-12-22 07:43:11,006 INFO L226 Difference]: Without dead ends: 13643 [2020-12-22 07:43:11,019 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 07:43:11,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13643 states. [2020-12-22 07:43:11,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13643 to 13641. [2020-12-22 07:43:11,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13641 states. [2020-12-22 07:43:11,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13641 states to 13641 states and 22653 transitions. [2020-12-22 07:43:11,614 INFO L78 Accepts]: Start accepts. Automaton has 13641 states and 22653 transitions. Word has length 136 [2020-12-22 07:43:11,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:43:11,614 INFO L481 AbstractCegarLoop]: Abstraction has 13641 states and 22653 transitions. [2020-12-22 07:43:11,614 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:43:11,615 INFO L276 IsEmpty]: Start isEmpty. Operand 13641 states and 22653 transitions. [2020-12-22 07:43:11,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-12-22 07:43:11,617 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:43:11,617 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:43:11,617 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 07:43:11,617 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:43:11,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:43:11,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1835427887, now seen corresponding path program 1 times [2020-12-22 07:43:11,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:43:11,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612779537] [2020-12-22 07:43:11,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:43:11,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:43:11,782 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 07:43:11,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612779537] [2020-12-22 07:43:11,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:43:11,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:43:11,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462733940] [2020-12-22 07:43:11,784 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:43:11,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:43:11,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:43:11,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:43:11,785 INFO L87 Difference]: Start difference. First operand 13641 states and 22653 transitions. Second operand 4 states. [2020-12-22 07:43:12,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:43:12,587 INFO L93 Difference]: Finished difference Result 44384 states and 73828 transitions. [2020-12-22 07:43:12,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:43:12,588 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 136 [2020-12-22 07:43:12,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:43:12,677 INFO L225 Difference]: With dead ends: 44384 [2020-12-22 07:43:12,678 INFO L226 Difference]: Without dead ends: 31103 [2020-12-22 07:43:12,708 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:43:12,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31103 states. [2020-12-22 07:43:13,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31103 to 22155. [2020-12-22 07:43:13,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22155 states. [2020-12-22 07:43:13,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22155 states to 22155 states and 36669 transitions. [2020-12-22 07:43:13,657 INFO L78 Accepts]: Start accepts. Automaton has 22155 states and 36669 transitions. Word has length 136 [2020-12-22 07:43:13,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:43:13,658 INFO L481 AbstractCegarLoop]: Abstraction has 22155 states and 36669 transitions. [2020-12-22 07:43:13,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:43:13,658 INFO L276 IsEmpty]: Start isEmpty. Operand 22155 states and 36669 transitions. [2020-12-22 07:43:13,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-12-22 07:43:13,660 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:43:13,660 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:43:13,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 07:43:13,661 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:43:13,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:43:13,661 INFO L82 PathProgramCache]: Analyzing trace with hash -443602444, now seen corresponding path program 1 times [2020-12-22 07:43:13,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:43:13,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041746444] [2020-12-22 07:43:13,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:43:13,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:43:13,749 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 07:43:13,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041746444] [2020-12-22 07:43:13,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:43:13,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:43:13,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470924291] [2020-12-22 07:43:13,750 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:43:13,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:43:13,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:43:13,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:43:13,751 INFO L87 Difference]: Start difference. First operand 22155 states and 36669 transitions. Second operand 3 states. [2020-12-22 07:43:14,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:43:14,785 INFO L93 Difference]: Finished difference Result 48794 states and 81139 transitions. [2020-12-22 07:43:14,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:43:14,786 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 136 [2020-12-22 07:43:14,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:43:14,892 INFO L225 Difference]: With dead ends: 48794 [2020-12-22 07:43:14,892 INFO L226 Difference]: Without dead ends: 33280 [2020-12-22 07:43:14,921 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 07:43:14,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33280 states. [2020-12-22 07:43:16,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33280 to 33278. [2020-12-22 07:43:16,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33278 states. [2020-12-22 07:43:16,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33278 states to 33278 states and 54919 transitions. [2020-12-22 07:43:16,287 INFO L78 Accepts]: Start accepts. Automaton has 33278 states and 54919 transitions. Word has length 136 [2020-12-22 07:43:16,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:43:16,288 INFO L481 AbstractCegarLoop]: Abstraction has 33278 states and 54919 transitions. [2020-12-22 07:43:16,288 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:43:16,288 INFO L276 IsEmpty]: Start isEmpty. Operand 33278 states and 54919 transitions. [2020-12-22 07:43:16,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-12-22 07:43:16,290 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:43:16,291 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:43:16,291 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 07:43:16,291 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:43:16,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:43:16,292 INFO L82 PathProgramCache]: Analyzing trace with hash -692908230, now seen corresponding path program 1 times [2020-12-22 07:43:16,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:43:16,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526182964] [2020-12-22 07:43:16,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:43:16,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:43:16,575 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 07:43:16,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526182964] [2020-12-22 07:43:16,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:43:16,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:43:16,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840531773] [2020-12-22 07:43:16,576 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:43:16,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:43:16,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:43:16,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:43:16,578 INFO L87 Difference]: Start difference. First operand 33278 states and 54919 transitions. Second operand 4 states. [2020-12-22 07:43:18,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:43:18,555 INFO L93 Difference]: Finished difference Result 108186 states and 178737 transitions. [2020-12-22 07:43:18,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:43:18,556 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 137 [2020-12-22 07:43:18,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:43:18,836 INFO L225 Difference]: With dead ends: 108186 [2020-12-22 07:43:18,836 INFO L226 Difference]: Without dead ends: 75154 [2020-12-22 07:43:18,920 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:43:18,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75154 states. [2020-12-22 07:43:21,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75154 to 54073. [2020-12-22 07:43:21,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54073 states. [2020-12-22 07:43:21,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54073 states to 54073 states and 88859 transitions. [2020-12-22 07:43:21,414 INFO L78 Accepts]: Start accepts. Automaton has 54073 states and 88859 transitions. Word has length 137 [2020-12-22 07:43:21,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:43:21,414 INFO L481 AbstractCegarLoop]: Abstraction has 54073 states and 88859 transitions. [2020-12-22 07:43:21,414 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:43:21,414 INFO L276 IsEmpty]: Start isEmpty. Operand 54073 states and 88859 transitions. [2020-12-22 07:43:21,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-22 07:43:21,426 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:43:21,426 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:43:21,426 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 07:43:21,426 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:43:21,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:43:21,427 INFO L82 PathProgramCache]: Analyzing trace with hash -1592912186, now seen corresponding path program 1 times [2020-12-22 07:43:21,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:43:21,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110068102] [2020-12-22 07:43:21,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:43:21,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:43:21,619 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 07:43:21,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110068102] [2020-12-22 07:43:21,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:43:21,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:43:21,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383305434] [2020-12-22 07:43:21,620 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:43:21,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:43:21,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:43:21,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:43:21,621 INFO L87 Difference]: Start difference. First operand 54073 states and 88859 transitions. Second operand 4 states. [2020-12-22 07:43:24,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:43:24,342 INFO L93 Difference]: Finished difference Result 177762 states and 292392 transitions. [2020-12-22 07:43:24,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:43:24,343 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 138 [2020-12-22 07:43:24,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:43:24,623 INFO L225 Difference]: With dead ends: 177762 [2020-12-22 07:43:24,623 INFO L226 Difference]: Without dead ends: 123935 [2020-12-22 07:43:24,679 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:43:24,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123935 states. [2020-12-22 07:43:27,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123935 to 86808. [2020-12-22 07:43:27,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86808 states. [2020-12-22 07:43:27,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86808 states to 86808 states and 142059 transitions. [2020-12-22 07:43:27,748 INFO L78 Accepts]: Start accepts. Automaton has 86808 states and 142059 transitions. Word has length 138 [2020-12-22 07:43:27,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:43:27,749 INFO L481 AbstractCegarLoop]: Abstraction has 86808 states and 142059 transitions. [2020-12-22 07:43:27,749 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:43:27,749 INFO L276 IsEmpty]: Start isEmpty. Operand 86808 states and 142059 transitions. [2020-12-22 07:43:27,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-12-22 07:43:27,751 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:43:27,751 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:43:27,752 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 07:43:27,752 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:43:27,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:43:27,753 INFO L82 PathProgramCache]: Analyzing trace with hash 298565918, now seen corresponding path program 1 times [2020-12-22 07:43:27,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:43:27,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868362887] [2020-12-22 07:43:27,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:43:27,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:43:28,022 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 07:43:28,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868362887] [2020-12-22 07:43:28,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:43:28,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:43:28,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959773641] [2020-12-22 07:43:28,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:43:28,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:43:28,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:43:28,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:43:28,025 INFO L87 Difference]: Start difference. First operand 86808 states and 142059 transitions. Second operand 4 states. [2020-12-22 07:43:31,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:43:31,859 INFO L93 Difference]: Finished difference Result 257840 states and 421711 transitions. [2020-12-22 07:43:31,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:43:31,859 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 140 [2020-12-22 07:43:31,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:43:32,346 INFO L225 Difference]: With dead ends: 257840 [2020-12-22 07:43:32,346 INFO L226 Difference]: Without dead ends: 171043 [2020-12-22 07:43:32,440 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:43:32,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171043 states. [2020-12-22 07:43:37,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171043 to 171041. [2020-12-22 07:43:37,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171041 states. [2020-12-22 07:43:37,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171041 states to 171041 states and 278494 transitions. [2020-12-22 07:43:37,557 INFO L78 Accepts]: Start accepts. Automaton has 171041 states and 278494 transitions. Word has length 140 [2020-12-22 07:43:37,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:43:37,557 INFO L481 AbstractCegarLoop]: Abstraction has 171041 states and 278494 transitions. [2020-12-22 07:43:37,557 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:43:37,557 INFO L276 IsEmpty]: Start isEmpty. Operand 171041 states and 278494 transitions. [2020-12-22 07:43:37,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-12-22 07:43:37,559 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:43:37,559 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:43:37,559 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 07:43:37,560 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:43:37,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:43:37,560 INFO L82 PathProgramCache]: Analyzing trace with hash -176222731, now seen corresponding path program 1 times [2020-12-22 07:43:37,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:43:37,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858770890] [2020-12-22 07:43:37,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:43:37,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:43:37,662 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 07:43:37,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858770890] [2020-12-22 07:43:37,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:43:37,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:43:37,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150500557] [2020-12-22 07:43:37,664 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:43:37,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:43:37,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:43:37,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:43:37,666 INFO L87 Difference]: Start difference. First operand 171041 states and 278494 transitions. Second operand 3 states. [2020-12-22 07:43:42,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:43:42,993 INFO L93 Difference]: Finished difference Result 414410 states and 677846 transitions. [2020-12-22 07:43:42,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:43:42,994 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 141 [2020-12-22 07:43:42,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:43:43,518 INFO L225 Difference]: With dead ends: 414410 [2020-12-22 07:43:43,518 INFO L226 Difference]: Without dead ends: 243767 [2020-12-22 07:43:43,659 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 07:43:43,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243767 states. [2020-12-22 07:43:50,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243767 to 237143. [2020-12-22 07:43:50,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237143 states. [2020-12-22 07:43:50,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237143 states to 237143 states and 384199 transitions. [2020-12-22 07:43:50,919 INFO L78 Accepts]: Start accepts. Automaton has 237143 states and 384199 transitions. Word has length 141 [2020-12-22 07:43:50,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:43:50,920 INFO L481 AbstractCegarLoop]: Abstraction has 237143 states and 384199 transitions. [2020-12-22 07:43:50,920 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:43:50,920 INFO L276 IsEmpty]: Start isEmpty. Operand 237143 states and 384199 transitions. [2020-12-22 07:43:50,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-12-22 07:43:50,921 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:43:50,922 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:43:50,922 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 07:43:50,922 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:43:50,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:43:50,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1671679888, now seen corresponding path program 1 times [2020-12-22 07:43:50,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:43:50,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214597848] [2020-12-22 07:43:50,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:43:50,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:43:50,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:43:50,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214597848] [2020-12-22 07:43:50,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:43:50,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:43:50,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261159829] [2020-12-22 07:43:50,977 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:43:50,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:43:50,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:43:50,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:43:50,978 INFO L87 Difference]: Start difference. First operand 237143 states and 384199 transitions. Second operand 3 states. [2020-12-22 07:44:01,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:44:01,013 INFO L93 Difference]: Finished difference Result 711392 states and 1152534 transitions. [2020-12-22 07:44:01,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:44:01,014 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 142 [2020-12-22 07:44:01,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:44:02,416 INFO L225 Difference]: With dead ends: 711392 [2020-12-22 07:44:02,416 INFO L226 Difference]: Without dead ends: 474270 [2020-12-22 07:44:02,682 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 07:44:03,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474270 states. [2020-12-22 07:44:11,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474270 to 237156. [2020-12-22 07:44:11,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237156 states. [2020-12-22 07:44:12,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237156 states to 237156 states and 384218 transitions. [2020-12-22 07:44:12,439 INFO L78 Accepts]: Start accepts. Automaton has 237156 states and 384218 transitions. Word has length 142 [2020-12-22 07:44:12,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:44:12,439 INFO L481 AbstractCegarLoop]: Abstraction has 237156 states and 384218 transitions. [2020-12-22 07:44:12,439 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:44:12,439 INFO L276 IsEmpty]: Start isEmpty. Operand 237156 states and 384218 transitions. [2020-12-22 07:44:12,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-12-22 07:44:12,444 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:44:12,444 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:44:12,446 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 07:44:12,446 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:44:12,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:44:12,447 INFO L82 PathProgramCache]: Analyzing trace with hash -939121031, now seen corresponding path program 1 times [2020-12-22 07:44:12,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:44:12,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555686500] [2020-12-22 07:44:12,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:44:12,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:44:12,633 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 07:44:12,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555686500] [2020-12-22 07:44:12,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:44:12,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:44:12,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429811946] [2020-12-22 07:44:12,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:44:12,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:44:12,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:44:12,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:44:12,638 INFO L87 Difference]: Start difference. First operand 237156 states and 384218 transitions. Second operand 3 states. [2020-12-22 07:44:23,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:44:23,420 INFO L93 Difference]: Finished difference Result 704111 states and 1139939 transitions. [2020-12-22 07:44:23,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:44:23,421 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 142 [2020-12-22 07:44:23,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:44:25,343 INFO L225 Difference]: With dead ends: 704111 [2020-12-22 07:44:25,344 INFO L226 Difference]: Without dead ends: 467093 [2020-12-22 07:44:25,741 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 07:44:26,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467093 states. [2020-12-22 07:44:41,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467093 to 467091. [2020-12-22 07:44:41,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 467091 states. [2020-12-22 07:44:43,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467091 states to 467091 states and 752671 transitions. [2020-12-22 07:44:43,410 INFO L78 Accepts]: Start accepts. Automaton has 467091 states and 752671 transitions. Word has length 142 [2020-12-22 07:44:43,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:44:43,411 INFO L481 AbstractCegarLoop]: Abstraction has 467091 states and 752671 transitions. [2020-12-22 07:44:43,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:44:43,411 INFO L276 IsEmpty]: Start isEmpty. Operand 467091 states and 752671 transitions. [2020-12-22 07:44:43,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-12-22 07:44:43,414 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:44:43,430 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:44:43,430 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 07:44:43,431 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:44:43,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:44:43,431 INFO L82 PathProgramCache]: Analyzing trace with hash 1189508400, now seen corresponding path program 1 times [2020-12-22 07:44:43,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:44:43,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198083486] [2020-12-22 07:44:43,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:44:43,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:44:43,668 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 07:44:43,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198083486] [2020-12-22 07:44:43,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:44:43,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:44:43,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616111375] [2020-12-22 07:44:43,670 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:44:43,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:44:43,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:44:43,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:44:43,671 INFO L87 Difference]: Start difference. First operand 467091 states and 752671 transitions. Second operand 4 states. [2020-12-22 07:45:07,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:45:07,931 INFO L93 Difference]: Finished difference Result 1388146 states and 2237394 transitions. [2020-12-22 07:45:07,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:45:07,932 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 143 [2020-12-22 07:45:07,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:45:10,661 INFO L225 Difference]: With dead ends: 1388146 [2020-12-22 07:45:10,662 INFO L226 Difference]: Without dead ends: 921092 [2020-12-22 07:45:11,162 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:45:12,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 921092 states. [2020-12-22 07:45:48,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 921092 to 921090. [2020-12-22 07:45:48,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 921090 states. [2020-12-22 07:45:56,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 921090 states to 921090 states and 1477426 transitions. [2020-12-22 07:45:56,530 INFO L78 Accepts]: Start accepts. Automaton has 921090 states and 1477426 transitions. Word has length 143 [2020-12-22 07:45:56,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:45:56,536 INFO L481 AbstractCegarLoop]: Abstraction has 921090 states and 1477426 transitions. [2020-12-22 07:45:56,536 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:45:56,537 INFO L276 IsEmpty]: Start isEmpty. Operand 921090 states and 1477426 transitions. [2020-12-22 07:45:56,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-12-22 07:45:56,559 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:45:56,559 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:45:56,560 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 07:45:56,560 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:45:56,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:45:56,561 INFO L82 PathProgramCache]: Analyzing trace with hash 943648514, now seen corresponding path program 1 times [2020-12-22 07:45:56,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:45:56,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093973700] [2020-12-22 07:45:56,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:45:56,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:45:56,706 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 07:45:56,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093973700] [2020-12-22 07:45:56,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:45:56,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:45:56,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618789767] [2020-12-22 07:45:56,713 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:45:56,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:45:56,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:45:56,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:45:56,714 INFO L87 Difference]: Start difference. First operand 921090 states and 1477426 transitions. Second operand 3 states.