/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/seq-mthreaded/pals_floodmax.5.1.ufo.BOUNDED-10.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 07:24:01,515 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 07:24:01,519 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 07:24:01,553 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 07:24:01,554 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 07:24:01,556 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 07:24:01,558 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 07:24:01,560 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 07:24:01,562 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 07:24:01,563 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 07:24:01,565 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 07:24:01,566 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 07:24:01,567 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 07:24:01,568 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 07:24:01,570 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 07:24:01,585 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 07:24:01,586 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 07:24:01,588 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 07:24:01,590 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 07:24:01,592 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 07:24:01,594 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 07:24:01,596 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 07:24:01,597 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 07:24:01,598 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 07:24:01,601 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 07:24:01,606 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 07:24:01,606 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 07:24:01,607 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 07:24:01,608 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 07:24:01,610 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 07:24:01,610 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 07:24:01,611 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 07:24:01,611 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 07:24:01,612 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 07:24:01,613 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 07:24:01,614 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 07:24:01,615 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 07:24:01,644 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 07:24:01,644 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 07:24:01,646 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 07:24:01,646 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 07:24:01,646 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 07:24:01,646 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 07:24:01,647 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 07:24:01,647 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 07:24:01,647 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 07:24:01,647 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 07:24:01,648 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 07:24:01,648 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 07:24:01,648 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 07:24:01,648 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 07:24:01,649 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 07:24:01,649 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 07:24:01,649 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 07:24:01,649 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:24:01,650 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 07:24:01,650 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 07:24:01,650 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 07:24:01,650 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 07:24:01,651 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 07:24:01,651 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 07:24:01,651 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 07:24:01,651 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 07:24:02,083 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 07:24:02,122 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 07:24:02,126 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 07:24:02,129 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 07:24:02,130 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 07:24:02,131 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_floodmax.5.1.ufo.BOUNDED-10.pals.c [2020-12-22 07:24:02,231 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b17f71242/412cccc029244835b26a67c3ab12eb9e/FLAG6196dc69c [2020-12-22 07:24:03,141 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 07:24:03,141 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_floodmax.5.1.ufo.BOUNDED-10.pals.c [2020-12-22 07:24:03,171 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b17f71242/412cccc029244835b26a67c3ab12eb9e/FLAG6196dc69c [2020-12-22 07:24:03,351 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b17f71242/412cccc029244835b26a67c3ab12eb9e [2020-12-22 07:24:03,354 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 07:24:03,356 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 07:24:03,358 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 07:24:03,359 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 07:24:03,363 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 07:24:03,364 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:24:03" (1/1) ... [2020-12-22 07:24:03,365 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5882fc80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:03, skipping insertion in model container [2020-12-22 07:24:03,366 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:24:03" (1/1) ... [2020-12-22 07:24:03,375 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 07:24:03,454 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 07:24:03,923 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_floodmax.5.1.ufo.BOUNDED-10.pals.c[52017,52030] [2020-12-22 07:24:03,928 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:24:03,944 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 07:24:04,174 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_floodmax.5.1.ufo.BOUNDED-10.pals.c[52017,52030] [2020-12-22 07:24:04,174 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:24:04,199 INFO L208 MainTranslator]: Completed translation [2020-12-22 07:24:04,199 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:04 WrapperNode [2020-12-22 07:24:04,199 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 07:24:04,201 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 07:24:04,201 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 07:24:04,201 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 07:24:04,211 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:04" (1/1) ... [2020-12-22 07:24:04,239 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:04" (1/1) ... [2020-12-22 07:24:04,371 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 07:24:04,373 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 07:24:04,374 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 07:24:04,374 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 07:24:04,390 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:04" (1/1) ... [2020-12-22 07:24:04,391 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:04" (1/1) ... [2020-12-22 07:24:04,409 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:04" (1/1) ... [2020-12-22 07:24:04,409 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:04" (1/1) ... [2020-12-22 07:24:04,452 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:04" (1/1) ... [2020-12-22 07:24:04,489 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:04" (1/1) ... [2020-12-22 07:24:04,508 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:04" (1/1) ... [2020-12-22 07:24:04,522 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 07:24:04,523 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 07:24:04,524 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 07:24:04,524 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 07:24:04,525 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:04" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:24:04,626 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 07:24:04,627 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 07:24:04,627 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 07:24:04,627 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 07:24:06,748 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 07:24:06,748 INFO L299 CfgBuilder]: Removed 23 assume(true) statements. [2020-12-22 07:24:06,751 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:24:06 BoogieIcfgContainer [2020-12-22 07:24:06,751 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 07:24:06,753 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 07:24:06,753 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 07:24:06,757 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 07:24:06,757 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:24:03" (1/3) ... [2020-12-22 07:24:06,758 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ce75b8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:24:06, skipping insertion in model container [2020-12-22 07:24:06,758 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:04" (2/3) ... [2020-12-22 07:24:06,759 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ce75b8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:24:06, skipping insertion in model container [2020-12-22 07:24:06,759 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:24:06" (3/3) ... [2020-12-22 07:24:06,760 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.1.ufo.BOUNDED-10.pals.c [2020-12-22 07:24:06,767 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 07:24:06,773 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 07:24:06,800 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 07:24:06,833 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 07:24:06,834 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 07:24:06,834 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 07:24:06,834 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 07:24:06,834 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 07:24:06,834 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 07:24:06,835 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 07:24:06,835 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 07:24:06,876 INFO L276 IsEmpty]: Start isEmpty. Operand 686 states. [2020-12-22 07:24:06,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-12-22 07:24:06,901 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:06,903 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:24:06,903 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:06,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:06,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1294677134, now seen corresponding path program 1 times [2020-12-22 07:24:06,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:06,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549138076] [2020-12-22 07:24:06,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:07,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:07,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:24:07,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549138076] [2020-12-22 07:24:07,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:07,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:24:07,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501736227] [2020-12-22 07:24:07,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 07:24:07,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:07,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 07:24:07,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:24:07,596 INFO L87 Difference]: Start difference. First operand 686 states. Second operand 2 states. [2020-12-22 07:24:07,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:07,669 INFO L93 Difference]: Finished difference Result 847 states and 1540 transitions. [2020-12-22 07:24:07,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 07:24:07,671 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 153 [2020-12-22 07:24:07,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:07,695 INFO L225 Difference]: With dead ends: 847 [2020-12-22 07:24:07,696 INFO L226 Difference]: Without dead ends: 682 [2020-12-22 07:24:07,700 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:24:07,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2020-12-22 07:24:07,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 682. [2020-12-22 07:24:07,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2020-12-22 07:24:07,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1256 transitions. [2020-12-22 07:24:07,818 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1256 transitions. Word has length 153 [2020-12-22 07:24:07,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:07,820 INFO L481 AbstractCegarLoop]: Abstraction has 682 states and 1256 transitions. [2020-12-22 07:24:07,820 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 07:24:07,820 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1256 transitions. [2020-12-22 07:24:07,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-12-22 07:24:07,828 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:07,828 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:24:07,829 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 07:24:07,829 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:07,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:07,830 INFO L82 PathProgramCache]: Analyzing trace with hash -1804150224, now seen corresponding path program 1 times [2020-12-22 07:24:07,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:07,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074754250] [2020-12-22 07:24:07,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:07,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:08,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:24:08,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074754250] [2020-12-22 07:24:08,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:08,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:24:08,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357759628] [2020-12-22 07:24:08,261 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:24:08,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:08,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:24:08,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:24:08,264 INFO L87 Difference]: Start difference. First operand 682 states and 1256 transitions. Second operand 5 states. [2020-12-22 07:24:08,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:08,483 INFO L93 Difference]: Finished difference Result 842 states and 1530 transitions. [2020-12-22 07:24:08,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 07:24:08,484 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 153 [2020-12-22 07:24:08,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:08,501 INFO L225 Difference]: With dead ends: 842 [2020-12-22 07:24:08,501 INFO L226 Difference]: Without dead ends: 682 [2020-12-22 07:24:08,508 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:24:08,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2020-12-22 07:24:08,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 682. [2020-12-22 07:24:08,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2020-12-22 07:24:08,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1216 transitions. [2020-12-22 07:24:08,565 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1216 transitions. Word has length 153 [2020-12-22 07:24:08,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:08,567 INFO L481 AbstractCegarLoop]: Abstraction has 682 states and 1216 transitions. [2020-12-22 07:24:08,567 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:24:08,567 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1216 transitions. [2020-12-22 07:24:08,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2020-12-22 07:24:08,577 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:08,578 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:24:08,578 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 07:24:08,579 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:08,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:08,583 INFO L82 PathProgramCache]: Analyzing trace with hash -63327919, now seen corresponding path program 1 times [2020-12-22 07:24:08,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:08,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149106101] [2020-12-22 07:24:08,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:08,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:08,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:24:08,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149106101] [2020-12-22 07:24:08,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:08,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:24:08,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776006641] [2020-12-22 07:24:08,939 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:24:08,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:08,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:24:08,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:24:08,943 INFO L87 Difference]: Start difference. First operand 682 states and 1216 transitions. Second operand 3 states. [2020-12-22 07:24:09,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:09,017 INFO L93 Difference]: Finished difference Result 981 states and 1731 transitions. [2020-12-22 07:24:09,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:24:09,018 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 192 [2020-12-22 07:24:09,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:09,027 INFO L225 Difference]: With dead ends: 981 [2020-12-22 07:24:09,027 INFO L226 Difference]: Without dead ends: 825 [2020-12-22 07:24:09,029 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:24:09,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2020-12-22 07:24:09,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 823. [2020-12-22 07:24:09,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 823 states. [2020-12-22 07:24:09,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 823 states to 823 states and 1455 transitions. [2020-12-22 07:24:09,072 INFO L78 Accepts]: Start accepts. Automaton has 823 states and 1455 transitions. Word has length 192 [2020-12-22 07:24:09,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:09,080 INFO L481 AbstractCegarLoop]: Abstraction has 823 states and 1455 transitions. [2020-12-22 07:24:09,080 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:24:09,081 INFO L276 IsEmpty]: Start isEmpty. Operand 823 states and 1455 transitions. [2020-12-22 07:24:09,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2020-12-22 07:24:09,086 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:09,086 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:24:09,087 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 07:24:09,087 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:09,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:09,088 INFO L82 PathProgramCache]: Analyzing trace with hash -1559342006, now seen corresponding path program 1 times [2020-12-22 07:24:09,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:09,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881096637] [2020-12-22 07:24:09,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:09,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:09,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:24:09,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881096637] [2020-12-22 07:24:09,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:09,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:24:09,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611520109] [2020-12-22 07:24:09,327 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:24:09,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:09,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:24:09,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:24:09,329 INFO L87 Difference]: Start difference. First operand 823 states and 1455 transitions. Second operand 3 states. [2020-12-22 07:24:09,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:09,380 INFO L93 Difference]: Finished difference Result 1112 states and 1954 transitions. [2020-12-22 07:24:09,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:24:09,380 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 196 [2020-12-22 07:24:09,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:09,386 INFO L225 Difference]: With dead ends: 1112 [2020-12-22 07:24:09,387 INFO L226 Difference]: Without dead ends: 956 [2020-12-22 07:24:09,388 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:24:09,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 956 states. [2020-12-22 07:24:09,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 956 to 954. [2020-12-22 07:24:09,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 954 states. [2020-12-22 07:24:09,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 954 states to 954 states and 1681 transitions. [2020-12-22 07:24:09,423 INFO L78 Accepts]: Start accepts. Automaton has 954 states and 1681 transitions. Word has length 196 [2020-12-22 07:24:09,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:09,424 INFO L481 AbstractCegarLoop]: Abstraction has 954 states and 1681 transitions. [2020-12-22 07:24:09,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:24:09,424 INFO L276 IsEmpty]: Start isEmpty. Operand 954 states and 1681 transitions. [2020-12-22 07:24:09,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2020-12-22 07:24:09,428 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:09,428 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:24:09,429 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 07:24:09,429 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:09,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:09,429 INFO L82 PathProgramCache]: Analyzing trace with hash 2005005805, now seen corresponding path program 1 times [2020-12-22 07:24:09,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:09,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255207990] [2020-12-22 07:24:09,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:09,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:09,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:24:09,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255207990] [2020-12-22 07:24:09,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:09,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:24:09,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699913262] [2020-12-22 07:24:09,650 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:24:09,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:09,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:24:09,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:24:09,652 INFO L87 Difference]: Start difference. First operand 954 states and 1681 transitions. Second operand 3 states. [2020-12-22 07:24:09,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:09,717 INFO L93 Difference]: Finished difference Result 1773 states and 3084 transitions. [2020-12-22 07:24:09,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:24:09,718 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 196 [2020-12-22 07:24:09,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:09,727 INFO L225 Difference]: With dead ends: 1773 [2020-12-22 07:24:09,727 INFO L226 Difference]: Without dead ends: 1347 [2020-12-22 07:24:09,729 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:24:09,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1347 states. [2020-12-22 07:24:09,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1347 to 1345. [2020-12-22 07:24:09,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1345 states. [2020-12-22 07:24:09,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1345 states to 1345 states and 2347 transitions. [2020-12-22 07:24:09,773 INFO L78 Accepts]: Start accepts. Automaton has 1345 states and 2347 transitions. Word has length 196 [2020-12-22 07:24:09,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:09,774 INFO L481 AbstractCegarLoop]: Abstraction has 1345 states and 2347 transitions. [2020-12-22 07:24:09,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:24:09,774 INFO L276 IsEmpty]: Start isEmpty. Operand 1345 states and 2347 transitions. [2020-12-22 07:24:09,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2020-12-22 07:24:09,778 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:09,778 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:24:09,778 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 07:24:09,778 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:09,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:09,779 INFO L82 PathProgramCache]: Analyzing trace with hash 703257958, now seen corresponding path program 1 times [2020-12-22 07:24:09,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:09,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572457967] [2020-12-22 07:24:09,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:09,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:09,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:24:09,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572457967] [2020-12-22 07:24:09,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:09,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:24:09,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574850878] [2020-12-22 07:24:09,966 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:24:09,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:09,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:24:09,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:24:09,967 INFO L87 Difference]: Start difference. First operand 1345 states and 2347 transitions. Second operand 3 states. [2020-12-22 07:24:10,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:10,078 INFO L93 Difference]: Finished difference Result 2138 states and 3706 transitions. [2020-12-22 07:24:10,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:24:10,079 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 200 [2020-12-22 07:24:10,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:10,093 INFO L225 Difference]: With dead ends: 2138 [2020-12-22 07:24:10,093 INFO L226 Difference]: Without dead ends: 1712 [2020-12-22 07:24:10,095 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:24:10,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1712 states. [2020-12-22 07:24:10,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1712 to 1710. [2020-12-22 07:24:10,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1710 states. [2020-12-22 07:24:10,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1710 states to 1710 states and 2968 transitions. [2020-12-22 07:24:10,172 INFO L78 Accepts]: Start accepts. Automaton has 1710 states and 2968 transitions. Word has length 200 [2020-12-22 07:24:10,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:10,173 INFO L481 AbstractCegarLoop]: Abstraction has 1710 states and 2968 transitions. [2020-12-22 07:24:10,173 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:24:10,173 INFO L276 IsEmpty]: Start isEmpty. Operand 1710 states and 2968 transitions. [2020-12-22 07:24:10,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2020-12-22 07:24:10,179 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:10,179 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:24:10,180 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 07:24:10,180 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:10,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:10,186 INFO L82 PathProgramCache]: Analyzing trace with hash 2120140937, now seen corresponding path program 1 times [2020-12-22 07:24:10,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:10,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488800480] [2020-12-22 07:24:10,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:10,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:10,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:24:10,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488800480] [2020-12-22 07:24:10,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:10,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:24:10,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780934403] [2020-12-22 07:24:10,443 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:24:10,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:10,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:24:10,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:24:10,444 INFO L87 Difference]: Start difference. First operand 1710 states and 2968 transitions. Second operand 3 states. [2020-12-22 07:24:10,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:10,516 INFO L93 Difference]: Finished difference Result 3943 states and 6771 transitions. [2020-12-22 07:24:10,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:24:10,516 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 200 [2020-12-22 07:24:10,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:10,532 INFO L225 Difference]: With dead ends: 3943 [2020-12-22 07:24:10,533 INFO L226 Difference]: Without dead ends: 2777 [2020-12-22 07:24:10,536 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:24:10,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2777 states. [2020-12-22 07:24:10,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2777 to 2775. [2020-12-22 07:24:10,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2775 states. [2020-12-22 07:24:10,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2775 states to 2775 states and 4765 transitions. [2020-12-22 07:24:10,627 INFO L78 Accepts]: Start accepts. Automaton has 2775 states and 4765 transitions. Word has length 200 [2020-12-22 07:24:10,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:10,627 INFO L481 AbstractCegarLoop]: Abstraction has 2775 states and 4765 transitions. [2020-12-22 07:24:10,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:24:10,628 INFO L276 IsEmpty]: Start isEmpty. Operand 2775 states and 4765 transitions. [2020-12-22 07:24:10,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2020-12-22 07:24:10,631 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:10,632 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:24:10,632 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 07:24:10,632 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:10,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:10,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1916941442, now seen corresponding path program 1 times [2020-12-22 07:24:10,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:10,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762082375] [2020-12-22 07:24:10,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:10,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:10,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:24:10,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762082375] [2020-12-22 07:24:10,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:10,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:24:10,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144553893] [2020-12-22 07:24:10,891 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:24:10,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:10,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:24:10,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:24:10,893 INFO L87 Difference]: Start difference. First operand 2775 states and 4765 transitions. Second operand 3 states. [2020-12-22 07:24:10,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:10,976 INFO L93 Difference]: Finished difference Result 4898 states and 8386 transitions. [2020-12-22 07:24:10,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:24:10,977 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 204 [2020-12-22 07:24:10,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:10,999 INFO L225 Difference]: With dead ends: 4898 [2020-12-22 07:24:10,999 INFO L226 Difference]: Without dead ends: 3732 [2020-12-22 07:24:11,007 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:24:11,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3732 states. [2020-12-22 07:24:11,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3732 to 3730. [2020-12-22 07:24:11,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3730 states. [2020-12-22 07:24:11,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3730 states to 3730 states and 6379 transitions. [2020-12-22 07:24:11,129 INFO L78 Accepts]: Start accepts. Automaton has 3730 states and 6379 transitions. Word has length 204 [2020-12-22 07:24:11,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:11,129 INFO L481 AbstractCegarLoop]: Abstraction has 3730 states and 6379 transitions. [2020-12-22 07:24:11,129 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:24:11,130 INFO L276 IsEmpty]: Start isEmpty. Operand 3730 states and 6379 transitions. [2020-12-22 07:24:11,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2020-12-22 07:24:11,133 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:11,134 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:24:11,134 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 07:24:11,134 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:11,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:11,135 INFO L82 PathProgramCache]: Analyzing trace with hash -111728347, now seen corresponding path program 1 times [2020-12-22 07:24:11,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:11,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898452007] [2020-12-22 07:24:11,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:11,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:11,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:24:11,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898452007] [2020-12-22 07:24:11,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:11,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:24:11,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194553544] [2020-12-22 07:24:11,400 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:24:11,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:11,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:24:11,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:24:11,403 INFO L87 Difference]: Start difference. First operand 3730 states and 6379 transitions. Second operand 3 states. [2020-12-22 07:24:11,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:11,566 INFO L93 Difference]: Finished difference Result 9773 states and 16578 transitions. [2020-12-22 07:24:11,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:24:11,567 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 204 [2020-12-22 07:24:11,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:11,606 INFO L225 Difference]: With dead ends: 9773 [2020-12-22 07:24:11,607 INFO L226 Difference]: Without dead ends: 6603 [2020-12-22 07:24:11,614 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:24:11,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6603 states. [2020-12-22 07:24:11,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6603 to 6601. [2020-12-22 07:24:11,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6601 states. [2020-12-22 07:24:11,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6601 states to 6601 states and 11167 transitions. [2020-12-22 07:24:11,853 INFO L78 Accepts]: Start accepts. Automaton has 6601 states and 11167 transitions. Word has length 204 [2020-12-22 07:24:11,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:11,854 INFO L481 AbstractCegarLoop]: Abstraction has 6601 states and 11167 transitions. [2020-12-22 07:24:11,854 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:24:11,854 INFO L276 IsEmpty]: Start isEmpty. Operand 6601 states and 11167 transitions. [2020-12-22 07:24:11,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2020-12-22 07:24:11,858 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:11,858 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:24:11,858 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 07:24:11,858 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:11,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:11,859 INFO L82 PathProgramCache]: Analyzing trace with hash 1237014942, now seen corresponding path program 1 times [2020-12-22 07:24:11,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:11,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907821741] [2020-12-22 07:24:11,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:11,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:12,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:24:12,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907821741] [2020-12-22 07:24:12,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:12,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:24:12,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894357047] [2020-12-22 07:24:12,084 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:24:12,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:12,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:24:12,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:24:12,085 INFO L87 Difference]: Start difference. First operand 6601 states and 11167 transitions. Second operand 3 states. [2020-12-22 07:24:12,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:12,300 INFO L93 Difference]: Finished difference Result 12282 states and 20770 transitions. [2020-12-22 07:24:12,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:24:12,300 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 208 [2020-12-22 07:24:12,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:12,359 INFO L225 Difference]: With dead ends: 12282 [2020-12-22 07:24:12,359 INFO L226 Difference]: Without dead ends: 9112 [2020-12-22 07:24:12,367 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:24:12,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9112 states. [2020-12-22 07:24:12,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9112 to 9110. [2020-12-22 07:24:12,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9110 states. [2020-12-22 07:24:12,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9110 states to 9110 states and 15358 transitions. [2020-12-22 07:24:12,675 INFO L78 Accepts]: Start accepts. Automaton has 9110 states and 15358 transitions. Word has length 208 [2020-12-22 07:24:12,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:12,676 INFO L481 AbstractCegarLoop]: Abstraction has 9110 states and 15358 transitions. [2020-12-22 07:24:12,676 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:24:12,676 INFO L276 IsEmpty]: Start isEmpty. Operand 9110 states and 15358 transitions. [2020-12-22 07:24:12,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2020-12-22 07:24:12,680 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:12,680 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:24:12,680 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 07:24:12,681 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:12,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:12,681 INFO L82 PathProgramCache]: Analyzing trace with hash -1536026687, now seen corresponding path program 1 times [2020-12-22 07:24:12,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:12,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398572846] [2020-12-22 07:24:12,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:12,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:12,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:24:12,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398572846] [2020-12-22 07:24:12,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:12,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:24:12,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873570699] [2020-12-22 07:24:12,860 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:24:12,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:12,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:24:12,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:24:12,863 INFO L87 Difference]: Start difference. First operand 9110 states and 15358 transitions. Second operand 3 states. [2020-12-22 07:24:13,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:13,229 INFO L93 Difference]: Finished difference Result 25287 states and 42333 transitions. [2020-12-22 07:24:13,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:24:13,229 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 208 [2020-12-22 07:24:13,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:13,273 INFO L225 Difference]: With dead ends: 25287 [2020-12-22 07:24:13,273 INFO L226 Difference]: Without dead ends: 16753 [2020-12-22 07:24:13,290 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:24:13,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16753 states. [2020-12-22 07:24:13,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16753 to 16751. [2020-12-22 07:24:13,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16751 states. [2020-12-22 07:24:13,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16751 states to 16751 states and 27913 transitions. [2020-12-22 07:24:13,909 INFO L78 Accepts]: Start accepts. Automaton has 16751 states and 27913 transitions. Word has length 208 [2020-12-22 07:24:13,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:13,909 INFO L481 AbstractCegarLoop]: Abstraction has 16751 states and 27913 transitions. [2020-12-22 07:24:13,909 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:24:13,909 INFO L276 IsEmpty]: Start isEmpty. Operand 16751 states and 27913 transitions. [2020-12-22 07:24:13,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2020-12-22 07:24:13,913 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:13,914 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:24:13,914 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 07:24:13,914 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:13,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:13,915 INFO L82 PathProgramCache]: Analyzing trace with hash -511882054, now seen corresponding path program 1 times [2020-12-22 07:24:13,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:13,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641036544] [2020-12-22 07:24:13,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:13,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:14,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:24:14,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641036544] [2020-12-22 07:24:14,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:14,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:24:14,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894695394] [2020-12-22 07:24:14,124 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:24:14,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:14,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:24:14,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:24:14,125 INFO L87 Difference]: Start difference. First operand 16751 states and 27913 transitions. Second operand 3 states. [2020-12-22 07:24:14,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:14,688 INFO L93 Difference]: Finished difference Result 31810 states and 53050 transitions. [2020-12-22 07:24:14,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:24:14,689 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 212 [2020-12-22 07:24:14,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:14,758 INFO L225 Difference]: With dead ends: 31810 [2020-12-22 07:24:14,759 INFO L226 Difference]: Without dead ends: 23276 [2020-12-22 07:24:14,780 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:24:14,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23276 states. [2020-12-22 07:24:15,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23276 to 23274. [2020-12-22 07:24:15,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23274 states. [2020-12-22 07:24:15,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23274 states to 23274 states and 38629 transitions. [2020-12-22 07:24:15,694 INFO L78 Accepts]: Start accepts. Automaton has 23274 states and 38629 transitions. Word has length 212 [2020-12-22 07:24:15,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:15,694 INFO L481 AbstractCegarLoop]: Abstraction has 23274 states and 38629 transitions. [2020-12-22 07:24:15,694 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:24:15,695 INFO L276 IsEmpty]: Start isEmpty. Operand 23274 states and 38629 transitions. [2020-12-22 07:24:15,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2020-12-22 07:24:15,698 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:15,698 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:24:15,698 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 07:24:15,699 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:15,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:15,699 INFO L82 PathProgramCache]: Analyzing trace with hash -818506659, now seen corresponding path program 1 times [2020-12-22 07:24:15,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:15,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428524958] [2020-12-22 07:24:15,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:15,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:16,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:24:16,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428524958] [2020-12-22 07:24:16,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:16,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 07:24:16,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564086456] [2020-12-22 07:24:16,052 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 07:24:16,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:16,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 07:24:16,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:24:16,054 INFO L87 Difference]: Start difference. First operand 23274 states and 38629 transitions. Second operand 7 states. [2020-12-22 07:24:19,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:19,317 INFO L93 Difference]: Finished difference Result 165528 states and 275806 transitions. [2020-12-22 07:24:19,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 07:24:19,317 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 212 [2020-12-22 07:24:19,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:19,881 INFO L225 Difference]: With dead ends: 165528 [2020-12-22 07:24:19,882 INFO L226 Difference]: Without dead ends: 142846 [2020-12-22 07:24:20,000 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2020-12-22 07:24:20,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142846 states. [2020-12-22 07:24:22,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142846 to 60489. [2020-12-22 07:24:22,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60489 states. [2020-12-22 07:24:22,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60489 states to 60489 states and 100401 transitions. [2020-12-22 07:24:22,966 INFO L78 Accepts]: Start accepts. Automaton has 60489 states and 100401 transitions. Word has length 212 [2020-12-22 07:24:22,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:22,967 INFO L481 AbstractCegarLoop]: Abstraction has 60489 states and 100401 transitions. [2020-12-22 07:24:22,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 07:24:22,967 INFO L276 IsEmpty]: Start isEmpty. Operand 60489 states and 100401 transitions. [2020-12-22 07:24:22,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2020-12-22 07:24:22,971 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:22,971 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:24:22,971 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 07:24:22,972 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:22,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:22,972 INFO L82 PathProgramCache]: Analyzing trace with hash -1870282202, now seen corresponding path program 1 times [2020-12-22 07:24:22,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:22,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044176490] [2020-12-22 07:24:22,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:23,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:23,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:24:23,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044176490] [2020-12-22 07:24:23,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:23,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:24:23,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288547819] [2020-12-22 07:24:23,375 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:24:23,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:23,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:24:23,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:24:23,376 INFO L87 Difference]: Start difference. First operand 60489 states and 100401 transitions. Second operand 4 states. [2020-12-22 07:24:25,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:25,178 INFO L93 Difference]: Finished difference Result 150489 states and 250041 transitions. [2020-12-22 07:24:25,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:24:25,179 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 213 [2020-12-22 07:24:25,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:25,330 INFO L225 Difference]: With dead ends: 150489 [2020-12-22 07:24:25,330 INFO L226 Difference]: Without dead ends: 90592 [2020-12-22 07:24:25,439 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 07:24:25,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90592 states. [2020-12-22 07:24:27,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90592 to 90427. [2020-12-22 07:24:27,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90427 states. [2020-12-22 07:24:27,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90427 states to 90427 states and 149877 transitions. [2020-12-22 07:24:27,950 INFO L78 Accepts]: Start accepts. Automaton has 90427 states and 149877 transitions. Word has length 213 [2020-12-22 07:24:27,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:27,951 INFO L481 AbstractCegarLoop]: Abstraction has 90427 states and 149877 transitions. [2020-12-22 07:24:27,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:24:27,951 INFO L276 IsEmpty]: Start isEmpty. Operand 90427 states and 149877 transitions. [2020-12-22 07:24:27,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2020-12-22 07:24:27,955 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:27,955 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:24:27,955 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 07:24:27,955 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:27,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:27,956 INFO L82 PathProgramCache]: Analyzing trace with hash 53418676, now seen corresponding path program 1 times [2020-12-22 07:24:27,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:27,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90006112] [2020-12-22 07:24:27,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:28,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:28,181 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 07:24:28,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90006112] [2020-12-22 07:24:28,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:28,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:24:28,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460661243] [2020-12-22 07:24:28,183 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:24:28,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:28,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:24:28,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:24:28,184 INFO L87 Difference]: Start difference. First operand 90427 states and 149877 transitions. Second operand 4 states. [2020-12-22 07:24:31,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:31,818 INFO L93 Difference]: Finished difference Result 299089 states and 496427 transitions. [2020-12-22 07:24:31,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:24:31,819 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 214 [2020-12-22 07:24:31,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:32,286 INFO L225 Difference]: With dead ends: 299089 [2020-12-22 07:24:32,286 INFO L226 Difference]: Without dead ends: 209254 [2020-12-22 07:24:32,395 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 07:24:32,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209254 states. [2020-12-22 07:24:36,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209254 to 149045. [2020-12-22 07:24:36,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149045 states. [2020-12-22 07:24:36,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149045 states to 149045 states and 246367 transitions. [2020-12-22 07:24:36,808 INFO L78 Accepts]: Start accepts. Automaton has 149045 states and 246367 transitions. Word has length 214 [2020-12-22 07:24:36,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:36,808 INFO L481 AbstractCegarLoop]: Abstraction has 149045 states and 246367 transitions. [2020-12-22 07:24:36,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:24:36,809 INFO L276 IsEmpty]: Start isEmpty. Operand 149045 states and 246367 transitions. [2020-12-22 07:24:36,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2020-12-22 07:24:36,814 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:36,815 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:24:36,815 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 07:24:36,815 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:36,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:36,816 INFO L82 PathProgramCache]: Analyzing trace with hash -272391907, now seen corresponding path program 1 times [2020-12-22 07:24:36,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:36,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175225261] [2020-12-22 07:24:36,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:36,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:36,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:24:36,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175225261] [2020-12-22 07:24:36,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:36,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:24:36,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882545014] [2020-12-22 07:24:36,991 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:24:36,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:36,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:24:36,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:24:36,992 INFO L87 Difference]: Start difference. First operand 149045 states and 246367 transitions. Second operand 4 states. [2020-12-22 07:24:42,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:42,699 INFO L93 Difference]: Finished difference Result 490644 states and 812338 transitions. [2020-12-22 07:24:42,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:24:42,700 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 215 [2020-12-22 07:24:42,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:43,321 INFO L225 Difference]: With dead ends: 490644 [2020-12-22 07:24:43,322 INFO L226 Difference]: Without dead ends: 342191 [2020-12-22 07:24:43,448 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 07:24:44,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342191 states. [2020-12-22 07:24:49,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342191 to 245091. [2020-12-22 07:24:49,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245091 states. [2020-12-22 07:24:50,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245091 states to 245091 states and 404065 transitions. [2020-12-22 07:24:50,860 INFO L78 Accepts]: Start accepts. Automaton has 245091 states and 404065 transitions. Word has length 215 [2020-12-22 07:24:50,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:50,860 INFO L481 AbstractCegarLoop]: Abstraction has 245091 states and 404065 transitions. [2020-12-22 07:24:50,860 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:24:50,860 INFO L276 IsEmpty]: Start isEmpty. Operand 245091 states and 404065 transitions. [2020-12-22 07:24:50,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2020-12-22 07:24:50,879 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:50,880 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:24:50,880 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 07:24:50,883 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:50,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:50,884 INFO L82 PathProgramCache]: Analyzing trace with hash -1613581045, now seen corresponding path program 1 times [2020-12-22 07:24:50,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:50,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93849171] [2020-12-22 07:24:50,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:50,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:51,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:24:51,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93849171] [2020-12-22 07:24:51,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:51,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:24:51,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212193532] [2020-12-22 07:24:51,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:24:51,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:51,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:24:51,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:24:51,116 INFO L87 Difference]: Start difference. First operand 245091 states and 404065 transitions. Second operand 4 states. [2020-12-22 07:25:00,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:25:00,674 INFO L93 Difference]: Finished difference Result 802812 states and 1325818 transitions. [2020-12-22 07:25:00,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:25:00,675 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 216 [2020-12-22 07:25:00,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:25:02,056 INFO L225 Difference]: With dead ends: 802812 [2020-12-22 07:25:02,056 INFO L226 Difference]: Without dead ends: 558313 [2020-12-22 07:25:02,318 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 07:25:02,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558313 states. [2020-12-22 07:25:13,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558313 to 400845. [2020-12-22 07:25:13,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 400845 states. [2020-12-22 07:25:14,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400845 states to 400845 states and 659155 transitions. [2020-12-22 07:25:14,820 INFO L78 Accepts]: Start accepts. Automaton has 400845 states and 659155 transitions. Word has length 216 [2020-12-22 07:25:14,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:25:14,821 INFO L481 AbstractCegarLoop]: Abstraction has 400845 states and 659155 transitions. [2020-12-22 07:25:14,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:25:14,821 INFO L276 IsEmpty]: Start isEmpty. Operand 400845 states and 659155 transitions. [2020-12-22 07:25:14,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2020-12-22 07:25:14,838 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:25:14,839 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:25:14,839 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 07:25:14,842 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:25:14,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:25:14,843 INFO L82 PathProgramCache]: Analyzing trace with hash -71767020, now seen corresponding path program 1 times [2020-12-22 07:25:14,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:25:14,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3514641] [2020-12-22 07:25:14,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:25:14,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:25:15,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:25:15,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3514641] [2020-12-22 07:25:15,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:25:15,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:25:15,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434506764] [2020-12-22 07:25:15,031 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:25:15,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:25:15,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:25:15,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:25:15,032 INFO L87 Difference]: Start difference. First operand 400845 states and 659155 transitions. Second operand 4 states. [2020-12-22 07:25:33,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:25:33,437 INFO L93 Difference]: Finished difference Result 1299316 states and 2140378 transitions. [2020-12-22 07:25:33,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:25:33,437 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 217 [2020-12-22 07:25:33,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:25:35,718 INFO L225 Difference]: With dead ends: 1299316 [2020-12-22 07:25:35,718 INFO L226 Difference]: Without dead ends: 899063 [2020-12-22 07:25:36,141 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 07:25:37,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 899063 states. [2020-12-22 07:25:54,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 899063 to 648587. [2020-12-22 07:25:54,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 648587 states. [2020-12-22 07:25:57,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648587 states to 648587 states and 1063885 transitions. [2020-12-22 07:25:57,801 INFO L78 Accepts]: Start accepts. Automaton has 648587 states and 1063885 transitions. Word has length 217 [2020-12-22 07:25:57,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:25:57,802 INFO L481 AbstractCegarLoop]: Abstraction has 648587 states and 1063885 transitions. [2020-12-22 07:25:57,802 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:25:57,802 INFO L276 IsEmpty]: Start isEmpty. Operand 648587 states and 1063885 transitions. [2020-12-22 07:25:57,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2020-12-22 07:25:57,807 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:25:57,812 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:25:57,812 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 07:25:57,813 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:25:57,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:25:57,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1741593292, now seen corresponding path program 1 times [2020-12-22 07:25:57,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:25:57,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384424195] [2020-12-22 07:25:57,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:25:57,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:25:58,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:25:58,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384424195] [2020-12-22 07:25:58,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:25:58,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 07:25:58,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964109050] [2020-12-22 07:25:58,240 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 07:25:58,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:25:58,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 07:25:58,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:25:58,241 INFO L87 Difference]: Start difference. First operand 648587 states and 1063885 transitions. Second operand 7 states. [2020-12-22 07:26:17,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:26:17,276 INFO L93 Difference]: Finished difference Result 1296586 states and 2126728 transitions. [2020-12-22 07:26:17,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 07:26:17,277 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 219 [2020-12-22 07:26:17,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:26:18,627 INFO L225 Difference]: With dead ends: 1296586 [2020-12-22 07:26:18,627 INFO L226 Difference]: Without dead ends: 648591 [2020-12-22 07:26:19,593 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2020-12-22 07:26:20,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648591 states. [2020-12-22 07:26:36,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648591 to 648587. [2020-12-22 07:26:36,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 648587 states. [2020-12-22 07:26:39,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648587 states to 648587 states and 1060760 transitions. [2020-12-22 07:26:39,070 INFO L78 Accepts]: Start accepts. Automaton has 648587 states and 1060760 transitions. Word has length 219 [2020-12-22 07:26:39,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:26:39,071 INFO L481 AbstractCegarLoop]: Abstraction has 648587 states and 1060760 transitions. [2020-12-22 07:26:39,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 07:26:39,071 INFO L276 IsEmpty]: Start isEmpty. Operand 648587 states and 1060760 transitions. [2020-12-22 07:26:39,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2020-12-22 07:26:39,088 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:26:39,088 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:26:39,088 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 07:26:39,088 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:26:39,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:26:39,091 INFO L82 PathProgramCache]: Analyzing trace with hash 1099284846, now seen corresponding path program 1 times [2020-12-22 07:26:39,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:26:39,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29791552] [2020-12-22 07:26:39,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:26:39,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:26:39,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:26:39,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29791552] [2020-12-22 07:26:39,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:26:39,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 07:26:39,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895739047] [2020-12-22 07:26:39,502 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 07:26:39,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:26:39,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 07:26:39,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:26:39,504 INFO L87 Difference]: Start difference. First operand 648587 states and 1060760 transitions. Second operand 7 states.