/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.2.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 08:07:30,283 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 08:07:30,287 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 08:07:30,341 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 08:07:30,341 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 08:07:30,346 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 08:07:30,349 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 08:07:30,357 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 08:07:30,361 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 08:07:30,366 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 08:07:30,368 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 08:07:30,369 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 08:07:30,370 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 08:07:30,373 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 08:07:30,374 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 08:07:30,376 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 08:07:30,377 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 08:07:30,380 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 08:07:30,387 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 08:07:30,397 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 08:07:30,399 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 08:07:30,401 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 08:07:30,403 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 08:07:30,405 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 08:07:30,432 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 08:07:30,450 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 08:07:30,451 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 08:07:30,453 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 08:07:30,454 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 08:07:30,454 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 08:07:30,455 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 08:07:30,455 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 08:07:30,456 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 08:07:30,456 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 08:07:30,457 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 08:07:30,458 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 08:07:30,459 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 08:07:30,514 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 08:07:30,514 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 08:07:30,520 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 08:07:30,520 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 08:07:30,520 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 08:07:30,520 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 08:07:30,521 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 08:07:30,521 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 08:07:30,521 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 08:07:30,522 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 08:07:30,523 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 08:07:30,523 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 08:07:30,523 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 08:07:30,524 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 08:07:30,524 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 08:07:30,524 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 08:07:30,524 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 08:07:30,524 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 08:07:30,525 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 08:07:30,525 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 08:07:30,525 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 08:07:30,526 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 08:07:30,526 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 08:07:30,526 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 08:07:30,526 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 08:07:30,527 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 08:07:30,963 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 08:07:30,991 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 08:07:30,995 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 08:07:30,996 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 08:07:30,997 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 08:07:30,998 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.2.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2020-12-22 08:07:31,094 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f5eb877d5/d56f4eaf9c294abab5f035265be82110/FLAG657eaac3d [2020-12-22 08:07:31,753 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 08:07:31,753 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.2.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2020-12-22 08:07:31,778 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f5eb877d5/d56f4eaf9c294abab5f035265be82110/FLAG657eaac3d [2020-12-22 08:07:32,022 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f5eb877d5/d56f4eaf9c294abab5f035265be82110 [2020-12-22 08:07:32,032 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 08:07:32,035 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 08:07:32,040 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 08:07:32,040 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 08:07:32,045 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 08:07:32,046 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:07:32" (1/1) ... [2020-12-22 08:07:32,049 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d4591be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:07:32, skipping insertion in model container [2020-12-22 08:07:32,049 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:07:32" (1/1) ... [2020-12-22 08:07:32,060 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 08:07:32,148 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 08:07:32,511 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.2.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c[12430,12443] [2020-12-22 08:07:32,621 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:07:32,638 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 08:07:32,735 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.2.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c[12430,12443] [2020-12-22 08:07:32,793 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:07:32,824 INFO L208 MainTranslator]: Completed translation [2020-12-22 08:07:32,825 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:07:32 WrapperNode [2020-12-22 08:07:32,825 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 08:07:32,827 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 08:07:32,827 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 08:07:32,828 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 08:07:32,850 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:07:32" (1/1) ... [2020-12-22 08:07:32,882 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:07:32" (1/1) ... [2020-12-22 08:07:32,971 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 08:07:32,972 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 08:07:32,972 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 08:07:32,972 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 08:07:32,983 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:07:32" (1/1) ... [2020-12-22 08:07:32,984 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:07:32" (1/1) ... [2020-12-22 08:07:32,992 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:07:32" (1/1) ... [2020-12-22 08:07:32,992 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:07:32" (1/1) ... [2020-12-22 08:07:33,011 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:07:32" (1/1) ... [2020-12-22 08:07:33,026 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:07:32" (1/1) ... [2020-12-22 08:07:33,032 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:07:32" (1/1) ... [2020-12-22 08:07:33,041 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 08:07:33,042 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 08:07:33,042 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 08:07:33,042 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 08:07:33,043 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:07:32" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 08:07:33,156 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 08:07:33,156 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 08:07:33,156 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 08:07:33,157 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 08:07:34,860 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 08:07:34,861 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 08:07:34,864 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:07:34 BoogieIcfgContainer [2020-12-22 08:07:34,864 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 08:07:34,866 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 08:07:34,866 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 08:07:34,870 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 08:07:34,871 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 08:07:32" (1/3) ... [2020-12-22 08:07:34,871 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c435783 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:07:34, skipping insertion in model container [2020-12-22 08:07:34,872 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:07:32" (2/3) ... [2020-12-22 08:07:34,872 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c435783 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:07:34, skipping insertion in model container [2020-12-22 08:07:34,872 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:07:34" (3/3) ... [2020-12-22 08:07:34,874 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.2.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2020-12-22 08:07:34,882 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 08:07:34,888 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 08:07:34,908 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 08:07:34,939 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 08:07:34,939 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 08:07:34,939 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 08:07:34,940 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 08:07:34,940 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 08:07:34,940 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 08:07:34,940 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 08:07:34,940 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 08:07:34,969 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states. [2020-12-22 08:07:34,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-22 08:07:34,985 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:07:34,986 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] [2020-12-22 08:07:34,987 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:07:34,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:07:34,994 INFO L82 PathProgramCache]: Analyzing trace with hash 304488522, now seen corresponding path program 1 times [2020-12-22 08:07:35,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:07:35,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365746743] [2020-12-22 08:07:35,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:07:35,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:07:35,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:07:35,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365746743] [2020-12-22 08:07:35,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:07:35,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:07:35,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939767446] [2020-12-22 08:07:35,651 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:07:35,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:07:35,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:07:35,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:07:35,696 INFO L87 Difference]: Start difference. First operand 319 states. Second operand 3 states. [2020-12-22 08:07:35,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:07:35,913 INFO L93 Difference]: Finished difference Result 568 states and 991 transitions. [2020-12-22 08:07:35,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:07:35,916 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 111 [2020-12-22 08:07:35,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:07:35,937 INFO L225 Difference]: With dead ends: 568 [2020-12-22 08:07:35,937 INFO L226 Difference]: Without dead ends: 432 [2020-12-22 08:07:35,942 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:07:35,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2020-12-22 08:07:36,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 430. [2020-12-22 08:07:36,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 430 states. [2020-12-22 08:07:36,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 714 transitions. [2020-12-22 08:07:36,037 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 714 transitions. Word has length 111 [2020-12-22 08:07:36,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:07:36,038 INFO L481 AbstractCegarLoop]: Abstraction has 430 states and 714 transitions. [2020-12-22 08:07:36,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:07:36,038 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 714 transitions. [2020-12-22 08:07:36,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-12-22 08:07:36,051 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:07:36,052 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] [2020-12-22 08:07:36,053 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 08:07:36,053 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:07:36,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:07:36,055 INFO L82 PathProgramCache]: Analyzing trace with hash -1517208970, now seen corresponding path program 1 times [2020-12-22 08:07:36,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:07:36,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440859723] [2020-12-22 08:07:36,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:07:36,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:07:36,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:07:36,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440859723] [2020-12-22 08:07:36,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:07:36,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:07:36,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984712190] [2020-12-22 08:07:36,319 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:07:36,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:07:36,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:07:36,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:07:36,321 INFO L87 Difference]: Start difference. First operand 430 states and 714 transitions. Second operand 3 states. [2020-12-22 08:07:36,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:07:36,386 INFO L93 Difference]: Finished difference Result 660 states and 1105 transitions. [2020-12-22 08:07:36,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:07:36,392 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 114 [2020-12-22 08:07:36,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:07:36,402 INFO L225 Difference]: With dead ends: 660 [2020-12-22 08:07:36,402 INFO L226 Difference]: Without dead ends: 533 [2020-12-22 08:07:36,404 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:07:36,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2020-12-22 08:07:36,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 531. [2020-12-22 08:07:36,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 531 states. [2020-12-22 08:07:36,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 886 transitions. [2020-12-22 08:07:36,469 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 886 transitions. Word has length 114 [2020-12-22 08:07:36,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:07:36,470 INFO L481 AbstractCegarLoop]: Abstraction has 531 states and 886 transitions. [2020-12-22 08:07:36,470 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:07:36,470 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 886 transitions. [2020-12-22 08:07:36,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-12-22 08:07:36,475 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:07:36,475 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] [2020-12-22 08:07:36,475 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 08:07:36,476 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:07:36,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:07:36,480 INFO L82 PathProgramCache]: Analyzing trace with hash -1179194652, now seen corresponding path program 1 times [2020-12-22 08:07:36,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:07:36,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397140439] [2020-12-22 08:07:36,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:07:36,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:07:36,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:07:36,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397140439] [2020-12-22 08:07:36,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:07:36,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:07:36,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695752213] [2020-12-22 08:07:36,620 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:07:36,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:07:36,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:07:36,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:07:36,621 INFO L87 Difference]: Start difference. First operand 531 states and 886 transitions. Second operand 3 states. [2020-12-22 08:07:36,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:07:36,707 INFO L93 Difference]: Finished difference Result 1184 states and 1985 transitions. [2020-12-22 08:07:36,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:07:36,708 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 114 [2020-12-22 08:07:36,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:07:36,715 INFO L225 Difference]: With dead ends: 1184 [2020-12-22 08:07:36,716 INFO L226 Difference]: Without dead ends: 844 [2020-12-22 08:07:36,718 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:07:36,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 844 states. [2020-12-22 08:07:36,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 844 to 842. [2020-12-22 08:07:36,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 842 states. [2020-12-22 08:07:36,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 1406 transitions. [2020-12-22 08:07:36,755 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 1406 transitions. Word has length 114 [2020-12-22 08:07:36,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:07:36,756 INFO L481 AbstractCegarLoop]: Abstraction has 842 states and 1406 transitions. [2020-12-22 08:07:36,756 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:07:36,756 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 1406 transitions. [2020-12-22 08:07:36,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-12-22 08:07:36,758 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:07:36,758 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:07:36,759 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 08:07:36,759 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:07:36,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:07:36,760 INFO L82 PathProgramCache]: Analyzing trace with hash -236553538, now seen corresponding path program 1 times [2020-12-22 08:07:36,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:07:36,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754721883] [2020-12-22 08:07:36,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:07:36,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:07:36,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:07:36,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754721883] [2020-12-22 08:07:36,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:07:36,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:07:36,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796081678] [2020-12-22 08:07:36,864 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:07:36,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:07:36,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:07:36,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:07:36,866 INFO L87 Difference]: Start difference. First operand 842 states and 1406 transitions. Second operand 3 states. [2020-12-22 08:07:36,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:07:36,927 INFO L93 Difference]: Finished difference Result 1462 states and 2452 transitions. [2020-12-22 08:07:36,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:07:36,928 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 117 [2020-12-22 08:07:36,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:07:36,935 INFO L225 Difference]: With dead ends: 1462 [2020-12-22 08:07:36,936 INFO L226 Difference]: Without dead ends: 1122 [2020-12-22 08:07:36,937 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:07:36,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1122 states. [2020-12-22 08:07:36,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1122 to 1120. [2020-12-22 08:07:36,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1120 states. [2020-12-22 08:07:36,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1120 states to 1120 states and 1872 transitions. [2020-12-22 08:07:36,982 INFO L78 Accepts]: Start accepts. Automaton has 1120 states and 1872 transitions. Word has length 117 [2020-12-22 08:07:36,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:07:36,983 INFO L481 AbstractCegarLoop]: Abstraction has 1120 states and 1872 transitions. [2020-12-22 08:07:36,983 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:07:36,983 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states and 1872 transitions. [2020-12-22 08:07:36,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-12-22 08:07:36,984 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:07:36,985 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] [2020-12-22 08:07:36,985 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 08:07:36,985 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:07:36,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:07:36,986 INFO L82 PathProgramCache]: Analyzing trace with hash 2147173936, now seen corresponding path program 1 times [2020-12-22 08:07:36,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:07:36,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366396006] [2020-12-22 08:07:36,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:07:37,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:07:37,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:07:37,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366396006] [2020-12-22 08:07:37,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:07:37,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:07:37,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050988482] [2020-12-22 08:07:37,156 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:07:37,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:07:37,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:07:37,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:07:37,158 INFO L87 Difference]: Start difference. First operand 1120 states and 1872 transitions. Second operand 3 states. [2020-12-22 08:07:37,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:07:37,307 INFO L93 Difference]: Finished difference Result 2861 states and 4787 transitions. [2020-12-22 08:07:37,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:07:37,312 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 117 [2020-12-22 08:07:37,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:07:37,331 INFO L225 Difference]: With dead ends: 2861 [2020-12-22 08:07:37,331 INFO L226 Difference]: Without dead ends: 1950 [2020-12-22 08:07:37,334 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:07:37,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1950 states. [2020-12-22 08:07:37,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1950 to 1948. [2020-12-22 08:07:37,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1948 states. [2020-12-22 08:07:37,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1948 states to 1948 states and 3243 transitions. [2020-12-22 08:07:37,472 INFO L78 Accepts]: Start accepts. Automaton has 1948 states and 3243 transitions. Word has length 117 [2020-12-22 08:07:37,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:07:37,473 INFO L481 AbstractCegarLoop]: Abstraction has 1948 states and 3243 transitions. [2020-12-22 08:07:37,473 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:07:37,473 INFO L276 IsEmpty]: Start isEmpty. Operand 1948 states and 3243 transitions. [2020-12-22 08:07:37,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-12-22 08:07:37,477 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:07:37,477 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] [2020-12-22 08:07:37,478 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 08:07:37,478 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:07:37,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:07:37,479 INFO L82 PathProgramCache]: Analyzing trace with hash 866565200, now seen corresponding path program 1 times [2020-12-22 08:07:37,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:07:37,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744343135] [2020-12-22 08:07:37,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:07:37,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:07:37,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:07:37,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744343135] [2020-12-22 08:07:37,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:07:37,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:07:37,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567893242] [2020-12-22 08:07:37,639 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:07:37,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:07:37,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:07:37,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:07:37,643 INFO L87 Difference]: Start difference. First operand 1948 states and 3243 transitions. Second operand 3 states. [2020-12-22 08:07:37,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:07:37,841 INFO L93 Difference]: Finished difference Result 3554 states and 5943 transitions. [2020-12-22 08:07:37,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:07:37,842 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 120 [2020-12-22 08:07:37,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:07:37,861 INFO L225 Difference]: With dead ends: 3554 [2020-12-22 08:07:37,861 INFO L226 Difference]: Without dead ends: 2643 [2020-12-22 08:07:37,864 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:07:37,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2643 states. [2020-12-22 08:07:38,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2643 to 2641. [2020-12-22 08:07:38,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2641 states. [2020-12-22 08:07:38,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2641 states to 2641 states and 4398 transitions. [2020-12-22 08:07:38,013 INFO L78 Accepts]: Start accepts. Automaton has 2641 states and 4398 transitions. Word has length 120 [2020-12-22 08:07:38,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:07:38,014 INFO L481 AbstractCegarLoop]: Abstraction has 2641 states and 4398 transitions. [2020-12-22 08:07:38,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:07:38,014 INFO L276 IsEmpty]: Start isEmpty. Operand 2641 states and 4398 transitions. [2020-12-22 08:07:38,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-12-22 08:07:38,016 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:07:38,016 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] [2020-12-22 08:07:38,017 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 08:07:38,017 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:07:38,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:07:38,018 INFO L82 PathProgramCache]: Analyzing trace with hash 83170558, now seen corresponding path program 1 times [2020-12-22 08:07:38,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:07:38,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347507039] [2020-12-22 08:07:38,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:07:38,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:07:38,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:07:38,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347507039] [2020-12-22 08:07:38,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:07:38,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:07:38,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127299509] [2020-12-22 08:07:38,151 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:07:38,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:07:38,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:07:38,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:07:38,153 INFO L87 Difference]: Start difference. First operand 2641 states and 4398 transitions. Second operand 3 states. [2020-12-22 08:07:38,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:07:38,482 INFO L93 Difference]: Finished difference Result 7226 states and 12005 transitions. [2020-12-22 08:07:38,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:07:38,483 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 120 [2020-12-22 08:07:38,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:07:38,510 INFO L225 Difference]: With dead ends: 7226 [2020-12-22 08:07:38,510 INFO L226 Difference]: Without dead ends: 4812 [2020-12-22 08:07:38,519 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:07:38,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4812 states. [2020-12-22 08:07:38,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4812 to 4810. [2020-12-22 08:07:38,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4810 states. [2020-12-22 08:07:38,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4810 states to 4810 states and 7944 transitions. [2020-12-22 08:07:38,842 INFO L78 Accepts]: Start accepts. Automaton has 4810 states and 7944 transitions. Word has length 120 [2020-12-22 08:07:38,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:07:38,843 INFO L481 AbstractCegarLoop]: Abstraction has 4810 states and 7944 transitions. [2020-12-22 08:07:38,843 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:07:38,843 INFO L276 IsEmpty]: Start isEmpty. Operand 4810 states and 7944 transitions. [2020-12-22 08:07:38,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-12-22 08:07:38,844 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:07:38,845 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] [2020-12-22 08:07:38,845 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 08:07:38,845 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:07:38,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:07:38,846 INFO L82 PathProgramCache]: Analyzing trace with hash 1139352598, now seen corresponding path program 1 times [2020-12-22 08:07:38,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:07:38,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830996697] [2020-12-22 08:07:38,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:07:38,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:07:38,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:07:38,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830996697] [2020-12-22 08:07:38,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:07:38,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:07:38,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083475891] [2020-12-22 08:07:38,998 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:07:38,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:07:38,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:07:38,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:07:38,999 INFO L87 Difference]: Start difference. First operand 4810 states and 7944 transitions. Second operand 6 states. [2020-12-22 08:07:41,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:07:41,201 INFO L93 Difference]: Finished difference Result 29771 states and 49577 transitions. [2020-12-22 08:07:41,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 08:07:41,202 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 123 [2020-12-22 08:07:41,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:07:41,349 INFO L225 Difference]: With dead ends: 29771 [2020-12-22 08:07:41,350 INFO L226 Difference]: Without dead ends: 25188 [2020-12-22 08:07:41,370 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 08:07:41,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25188 states. [2020-12-22 08:07:42,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25188 to 9236. [2020-12-22 08:07:42,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9236 states. [2020-12-22 08:07:42,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9236 states to 9236 states and 15212 transitions. [2020-12-22 08:07:42,299 INFO L78 Accepts]: Start accepts. Automaton has 9236 states and 15212 transitions. Word has length 123 [2020-12-22 08:07:42,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:07:42,300 INFO L481 AbstractCegarLoop]: Abstraction has 9236 states and 15212 transitions. [2020-12-22 08:07:42,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:07:42,300 INFO L276 IsEmpty]: Start isEmpty. Operand 9236 states and 15212 transitions. [2020-12-22 08:07:42,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-12-22 08:07:42,302 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:07:42,302 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] [2020-12-22 08:07:42,302 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 08:07:42,303 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:07:42,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:07:42,304 INFO L82 PathProgramCache]: Analyzing trace with hash 893130139, now seen corresponding path program 1 times [2020-12-22 08:07:42,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:07:42,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26355501] [2020-12-22 08:07:42,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:07:42,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:07:42,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:07:42,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26355501] [2020-12-22 08:07:42,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:07:42,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:07:42,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762309966] [2020-12-22 08:07:42,458 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:07:42,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:07:42,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:07:42,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:07:42,460 INFO L87 Difference]: Start difference. First operand 9236 states and 15212 transitions. Second operand 4 states. [2020-12-22 08:07:44,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:07:44,227 INFO L93 Difference]: Finished difference Result 30029 states and 49739 transitions. [2020-12-22 08:07:44,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:07:44,228 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 124 [2020-12-22 08:07:44,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:07:44,289 INFO L225 Difference]: With dead ends: 30029 [2020-12-22 08:07:44,289 INFO L226 Difference]: Without dead ends: 21020 [2020-12-22 08:07:44,305 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 08:07:44,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21020 states. [2020-12-22 08:07:45,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21020 to 15091. [2020-12-22 08:07:45,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15091 states. [2020-12-22 08:07:45,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15091 states to 15091 states and 24876 transitions. [2020-12-22 08:07:45,373 INFO L78 Accepts]: Start accepts. Automaton has 15091 states and 24876 transitions. Word has length 124 [2020-12-22 08:07:45,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:07:45,373 INFO L481 AbstractCegarLoop]: Abstraction has 15091 states and 24876 transitions. [2020-12-22 08:07:45,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:07:45,373 INFO L276 IsEmpty]: Start isEmpty. Operand 15091 states and 24876 transitions. [2020-12-22 08:07:45,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-12-22 08:07:45,375 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:07:45,375 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] [2020-12-22 08:07:45,376 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 08:07:45,376 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:07:45,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:07:45,377 INFO L82 PathProgramCache]: Analyzing trace with hash -485089184, now seen corresponding path program 1 times [2020-12-22 08:07:45,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:07:45,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713799340] [2020-12-22 08:07:45,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:07:45,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:07:45,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:07:45,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713799340] [2020-12-22 08:07:45,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:07:45,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:07:45,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596178461] [2020-12-22 08:07:45,490 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:07:45,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:07:45,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:07:45,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:07:45,495 INFO L87 Difference]: Start difference. First operand 15091 states and 24876 transitions. Second operand 3 states. [2020-12-22 08:07:46,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:07:46,686 INFO L93 Difference]: Finished difference Result 28697 states and 47478 transitions. [2020-12-22 08:07:46,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:07:46,687 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 124 [2020-12-22 08:07:46,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:07:46,750 INFO L225 Difference]: With dead ends: 28697 [2020-12-22 08:07:46,750 INFO L226 Difference]: Without dead ends: 20733 [2020-12-22 08:07:46,770 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:07:46,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20733 states. [2020-12-22 08:07:48,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20733 to 20731. [2020-12-22 08:07:48,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20731 states. [2020-12-22 08:07:48,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20731 states to 20731 states and 34119 transitions. [2020-12-22 08:07:48,150 INFO L78 Accepts]: Start accepts. Automaton has 20731 states and 34119 transitions. Word has length 124 [2020-12-22 08:07:48,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:07:48,150 INFO L481 AbstractCegarLoop]: Abstraction has 20731 states and 34119 transitions. [2020-12-22 08:07:48,151 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:07:48,151 INFO L276 IsEmpty]: Start isEmpty. Operand 20731 states and 34119 transitions. [2020-12-22 08:07:48,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-12-22 08:07:48,152 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:07:48,153 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 08:07:48,153 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 08:07:48,153 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:07:48,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:07:48,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1854726525, now seen corresponding path program 1 times [2020-12-22 08:07:48,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:07:48,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66242622] [2020-12-22 08:07:48,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:07:48,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:07:48,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:07:48,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66242622] [2020-12-22 08:07:48,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:07:48,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:07:48,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556904011] [2020-12-22 08:07:48,270 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:07:48,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:07:48,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:07:48,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:07:48,271 INFO L87 Difference]: Start difference. First operand 20731 states and 34119 transitions. Second operand 4 states. [2020-12-22 08:07:50,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:07:50,698 INFO L93 Difference]: Finished difference Result 67909 states and 112035 transitions. [2020-12-22 08:07:50,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:07:50,699 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 125 [2020-12-22 08:07:50,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:07:50,852 INFO L225 Difference]: With dead ends: 67909 [2020-12-22 08:07:50,852 INFO L226 Difference]: Without dead ends: 47423 [2020-12-22 08:07:50,890 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 08:07:50,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47423 states. [2020-12-22 08:07:53,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47423 to 33748. [2020-12-22 08:07:53,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33748 states. [2020-12-22 08:07:53,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33748 states to 33748 states and 55389 transitions. [2020-12-22 08:07:53,256 INFO L78 Accepts]: Start accepts. Automaton has 33748 states and 55389 transitions. Word has length 125 [2020-12-22 08:07:53,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:07:53,256 INFO L481 AbstractCegarLoop]: Abstraction has 33748 states and 55389 transitions. [2020-12-22 08:07:53,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:07:53,256 INFO L276 IsEmpty]: Start isEmpty. Operand 33748 states and 55389 transitions. [2020-12-22 08:07:53,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-12-22 08:07:53,258 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:07:53,258 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] [2020-12-22 08:07:53,258 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 08:07:53,258 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:07:53,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:07:53,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1604001442, now seen corresponding path program 1 times [2020-12-22 08:07:53,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:07:53,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968246087] [2020-12-22 08:07:53,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:07:53,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:07:53,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:07:53,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968246087] [2020-12-22 08:07:53,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:07:53,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:07:53,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14605041] [2020-12-22 08:07:53,361 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:07:53,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:07:53,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:07:53,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:07:53,362 INFO L87 Difference]: Start difference. First operand 33748 states and 55389 transitions. Second operand 4 states. [2020-12-22 08:07:57,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:07:57,235 INFO L93 Difference]: Finished difference Result 109323 states and 179874 transitions. [2020-12-22 08:07:57,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:07:57,236 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 126 [2020-12-22 08:07:57,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:07:57,434 INFO L225 Difference]: With dead ends: 109323 [2020-12-22 08:07:57,434 INFO L226 Difference]: Without dead ends: 75820 [2020-12-22 08:07:57,505 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 08:07:57,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75820 states. [2020-12-22 08:08:00,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75820 to 54641. [2020-12-22 08:08:00,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54641 states. [2020-12-22 08:08:01,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54641 states to 54641 states and 89427 transitions. [2020-12-22 08:08:01,044 INFO L78 Accepts]: Start accepts. Automaton has 54641 states and 89427 transitions. Word has length 126 [2020-12-22 08:08:01,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:08:01,044 INFO L481 AbstractCegarLoop]: Abstraction has 54641 states and 89427 transitions. [2020-12-22 08:08:01,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:08:01,044 INFO L276 IsEmpty]: Start isEmpty. Operand 54641 states and 89427 transitions. [2020-12-22 08:08:01,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-12-22 08:08:01,046 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:08:01,046 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] [2020-12-22 08:08:01,046 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 08:08:01,046 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:08:01,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:08:01,047 INFO L82 PathProgramCache]: Analyzing trace with hash -1868950812, now seen corresponding path program 1 times [2020-12-22 08:08:01,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:08:01,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684266933] [2020-12-22 08:08:01,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:08:01,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:08:01,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:08:01,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684266933] [2020-12-22 08:08:01,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:08:01,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:08:01,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329637161] [2020-12-22 08:08:01,138 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:08:01,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:08:01,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:08:01,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:08:01,139 INFO L87 Difference]: Start difference. First operand 54641 states and 89427 transitions. Second operand 4 states. [2020-12-22 08:08:07,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:08:07,990 INFO L93 Difference]: Finished difference Result 175049 states and 287186 transitions. [2020-12-22 08:08:07,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:08:07,991 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 127 [2020-12-22 08:08:07,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:08:08,381 INFO L225 Difference]: With dead ends: 175049 [2020-12-22 08:08:08,381 INFO L226 Difference]: Without dead ends: 120653 [2020-12-22 08:08:08,492 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 08:08:08,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120653 states. [2020-12-22 08:08:14,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120653 to 87422. [2020-12-22 08:08:14,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87422 states. [2020-12-22 08:08:14,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87422 states to 87422 states and 142673 transitions. [2020-12-22 08:08:14,252 INFO L78 Accepts]: Start accepts. Automaton has 87422 states and 142673 transitions. Word has length 127 [2020-12-22 08:08:14,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:08:14,253 INFO L481 AbstractCegarLoop]: Abstraction has 87422 states and 142673 transitions. [2020-12-22 08:08:14,253 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:08:14,253 INFO L276 IsEmpty]: Start isEmpty. Operand 87422 states and 142673 transitions. [2020-12-22 08:08:14,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-22 08:08:14,256 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:08:14,256 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] [2020-12-22 08:08:14,256 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 08:08:14,256 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:08:14,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:08:14,259 INFO L82 PathProgramCache]: Analyzing trace with hash 2012261173, now seen corresponding path program 1 times [2020-12-22 08:08:14,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:08:14,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804164364] [2020-12-22 08:08:14,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:08:14,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:08:14,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:08:14,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804164364] [2020-12-22 08:08:14,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:08:14,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:08:14,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130037026] [2020-12-22 08:08:14,455 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:08:14,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:08:14,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:08:14,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:08:14,457 INFO L87 Difference]: Start difference. First operand 87422 states and 142673 transitions. Second operand 6 states. [2020-12-22 08:08:14,747 WARN L197 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-12-22 08:08:20,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:08:20,282 INFO L93 Difference]: Finished difference Result 174601 states and 284955 transitions. [2020-12-22 08:08:20,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:08:20,282 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 129 [2020-12-22 08:08:20,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:08:20,430 INFO L225 Difference]: With dead ends: 174601 [2020-12-22 08:08:20,430 INFO L226 Difference]: Without dead ends: 87424 [2020-12-22 08:08:20,496 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-12-22 08:08:20,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87424 states. [2020-12-22 08:08:25,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87424 to 87422. [2020-12-22 08:08:25,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87422 states. [2020-12-22 08:08:25,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87422 states to 87422 states and 142048 transitions. [2020-12-22 08:08:25,957 INFO L78 Accepts]: Start accepts. Automaton has 87422 states and 142048 transitions. Word has length 129 [2020-12-22 08:08:25,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:08:25,958 INFO L481 AbstractCegarLoop]: Abstraction has 87422 states and 142048 transitions. [2020-12-22 08:08:25,958 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:08:25,958 INFO L276 IsEmpty]: Start isEmpty. Operand 87422 states and 142048 transitions. [2020-12-22 08:08:25,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-12-22 08:08:25,959 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:08:25,959 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] [2020-12-22 08:08:25,960 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 08:08:25,960 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:08:25,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:08:25,960 INFO L82 PathProgramCache]: Analyzing trace with hash 365685076, now seen corresponding path program 1 times [2020-12-22 08:08:25,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:08:25,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581495537] [2020-12-22 08:08:25,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:08:25,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:08:26,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:08:26,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581495537] [2020-12-22 08:08:26,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:08:26,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:08:26,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636929421] [2020-12-22 08:08:26,155 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:08:26,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:08:26,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:08:26,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:08:26,156 INFO L87 Difference]: Start difference. First operand 87422 states and 142048 transitions. Second operand 6 states. [2020-12-22 08:08:42,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:08:42,002 INFO L93 Difference]: Finished difference Result 328443 states and 534734 transitions. [2020-12-22 08:08:42,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:08:42,003 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 132 [2020-12-22 08:08:42,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:08:42,516 INFO L225 Difference]: With dead ends: 328443 [2020-12-22 08:08:42,516 INFO L226 Difference]: Without dead ends: 241266 [2020-12-22 08:08:42,629 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:08:42,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241266 states. [2020-12-22 08:08:55,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241266 to 168414. [2020-12-22 08:08:55,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168414 states. [2020-12-22 08:08:55,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168414 states to 168414 states and 272047 transitions. [2020-12-22 08:08:55,955 INFO L78 Accepts]: Start accepts. Automaton has 168414 states and 272047 transitions. Word has length 132 [2020-12-22 08:08:55,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:08:55,956 INFO L481 AbstractCegarLoop]: Abstraction has 168414 states and 272047 transitions. [2020-12-22 08:08:55,956 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:08:55,956 INFO L276 IsEmpty]: Start isEmpty. Operand 168414 states and 272047 transitions. [2020-12-22 08:08:55,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-12-22 08:08:55,957 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:08:55,957 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:08:55,957 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 08:08:55,958 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:08:55,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:08:55,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1550573646, now seen corresponding path program 1 times [2020-12-22 08:08:55,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:08:55,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628287250] [2020-12-22 08:08:55,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:08:56,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:08:56,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:08:56,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628287250] [2020-12-22 08:08:56,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:08:56,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:08:56,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791377375] [2020-12-22 08:08:56,185 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:08:56,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:08:56,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:08:56,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:08:56,187 INFO L87 Difference]: Start difference. First operand 168414 states and 272047 transitions. Second operand 5 states. [2020-12-22 08:09:20,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:09:20,012 INFO L93 Difference]: Finished difference Result 327635 states and 527088 transitions. [2020-12-22 08:09:20,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:09:20,013 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 133 [2020-12-22 08:09:20,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:09:20,914 INFO L225 Difference]: With dead ends: 327635 [2020-12-22 08:09:20,914 INFO L226 Difference]: Without dead ends: 327633 [2020-12-22 08:09:21,026 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:09:21,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327633 states. [2020-12-22 08:09:36,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327633 to 172482. [2020-12-22 08:09:36,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172482 states. [2020-12-22 08:09:36,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172482 states to 172482 states and 276088 transitions. [2020-12-22 08:09:36,910 INFO L78 Accepts]: Start accepts. Automaton has 172482 states and 276088 transitions. Word has length 133 [2020-12-22 08:09:36,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:09:36,911 INFO L481 AbstractCegarLoop]: Abstraction has 172482 states and 276088 transitions. [2020-12-22 08:09:36,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:09:36,911 INFO L276 IsEmpty]: Start isEmpty. Operand 172482 states and 276088 transitions. [2020-12-22 08:09:36,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-12-22 08:09:36,918 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:09:36,925 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:09:36,926 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 08:09:36,926 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:09:36,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:09:36,927 INFO L82 PathProgramCache]: Analyzing trace with hash -2098432369, now seen corresponding path program 1 times [2020-12-22 08:09:36,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:09:36,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442583260] [2020-12-22 08:09:36,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:09:36,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:09:37,113 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 08:09:37,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442583260] [2020-12-22 08:09:37,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:09:37,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:09:37,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552987300] [2020-12-22 08:09:37,115 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:09:37,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:09:37,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:09:37,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:09:37,116 INFO L87 Difference]: Start difference. First operand 172482 states and 276088 transitions. Second operand 6 states. [2020-12-22 08:10:01,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:10:01,742 INFO L93 Difference]: Finished difference Result 359636 states and 578793 transitions. [2020-12-22 08:10:01,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:10:01,743 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 163 [2020-12-22 08:10:01,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:10:02,402 INFO L225 Difference]: With dead ends: 359636 [2020-12-22 08:10:02,403 INFO L226 Difference]: Without dead ends: 283834 [2020-12-22 08:10:02,532 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 08:10:02,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283834 states. [2020-12-22 08:10:22,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283834 to 225007. [2020-12-22 08:10:22,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225007 states. [2020-12-22 08:10:23,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225007 states to 225007 states and 360557 transitions. [2020-12-22 08:10:23,334 INFO L78 Accepts]: Start accepts. Automaton has 225007 states and 360557 transitions. Word has length 163 [2020-12-22 08:10:23,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:10:23,335 INFO L481 AbstractCegarLoop]: Abstraction has 225007 states and 360557 transitions. [2020-12-22 08:10:23,335 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:10:23,335 INFO L276 IsEmpty]: Start isEmpty. Operand 225007 states and 360557 transitions. [2020-12-22 08:10:23,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-12-22 08:10:23,347 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:10:23,347 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:10:23,348 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 08:10:23,348 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:10:23,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:10:23,360 INFO L82 PathProgramCache]: Analyzing trace with hash -903642171, now seen corresponding path program 1 times [2020-12-22 08:10:23,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:10:23,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635707406] [2020-12-22 08:10:23,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:10:23,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:10:23,524 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 08:10:23,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635707406] [2020-12-22 08:10:23,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:10:23,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:10:23,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67732973] [2020-12-22 08:10:23,525 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:10:23,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:10:23,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:10:23,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:10:23,526 INFO L87 Difference]: Start difference. First operand 225007 states and 360557 transitions. Second operand 6 states.