/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 08:28:32,331 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 08:28:32,334 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 08:28:32,375 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 08:28:32,376 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 08:28:32,379 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 08:28:32,383 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 08:28:32,390 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 08:28:32,394 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 08:28:32,401 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 08:28:32,403 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 08:28:32,404 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 08:28:32,404 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 08:28:32,405 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 08:28:32,408 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 08:28:32,410 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 08:28:32,411 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 08:28:32,415 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 08:28:32,423 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 08:28:32,428 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 08:28:32,431 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 08:28:32,434 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 08:28:32,448 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 08:28:32,449 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 08:28:32,457 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 08:28:32,464 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 08:28:32,465 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 08:28:32,466 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 08:28:32,467 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 08:28:32,468 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 08:28:32,468 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 08:28:32,469 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 08:28:32,469 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 08:28:32,469 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 08:28:32,470 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 08:28:32,471 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 08:28:32,472 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 08:28:32,499 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 08:28:32,499 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 08:28:32,501 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 08:28:32,501 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 08:28:32,501 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 08:28:32,502 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 08:28:32,502 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 08:28:32,502 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 08:28:32,502 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 08:28:32,503 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 08:28:32,503 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 08:28:32,503 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 08:28:32,503 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 08:28:32,504 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 08:28:32,504 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 08:28:32,504 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 08:28:32,504 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 08:28:32,505 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 08:28:32,505 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 08:28:32,505 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 08:28:32,505 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 08:28:32,506 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 08:28:32,506 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 08:28:32,506 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 08:28:32,506 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 08:28:32,506 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 08:28:32,851 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 08:28:32,878 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 08:28:32,882 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 08:28:32,883 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 08:28:32,884 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 08:28:32,885 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2020-12-22 08:28:32,969 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a523103e/cc3b2d3a26b5481c965ef4c22f5cba83/FLAGcc3074bbc [2020-12-22 08:28:33,706 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 08:28:33,707 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2020-12-22 08:28:33,726 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a523103e/cc3b2d3a26b5481c965ef4c22f5cba83/FLAGcc3074bbc [2020-12-22 08:28:33,956 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a523103e/cc3b2d3a26b5481c965ef4c22f5cba83 [2020-12-22 08:28:33,959 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 08:28:33,961 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 08:28:33,963 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 08:28:33,964 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 08:28:33,968 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 08:28:33,969 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:28:33" (1/1) ... [2020-12-22 08:28:33,971 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@490239bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:28:33, skipping insertion in model container [2020-12-22 08:28:33,972 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:28:33" (1/1) ... [2020-12-22 08:28:33,986 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 08:28:34,083 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 08:28:34,549 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c[12811,12824] [2020-12-22 08:28:34,670 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:28:34,687 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 08:28:34,866 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c[12811,12824] [2020-12-22 08:28:34,946 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:28:34,968 INFO L208 MainTranslator]: Completed translation [2020-12-22 08:28:34,968 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:28:34 WrapperNode [2020-12-22 08:28:34,969 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 08:28:34,970 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 08:28:34,970 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 08:28:34,970 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 08:28:34,981 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:28:34" (1/1) ... [2020-12-22 08:28:35,000 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:28:34" (1/1) ... [2020-12-22 08:28:35,083 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 08:28:35,084 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 08:28:35,084 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 08:28:35,084 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 08:28:35,092 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:28:34" (1/1) ... [2020-12-22 08:28:35,092 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:28:34" (1/1) ... [2020-12-22 08:28:35,100 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:28:34" (1/1) ... [2020-12-22 08:28:35,100 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:28:34" (1/1) ... [2020-12-22 08:28:35,118 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:28:34" (1/1) ... [2020-12-22 08:28:35,132 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:28:34" (1/1) ... [2020-12-22 08:28:35,139 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:28:34" (1/1) ... [2020-12-22 08:28:35,149 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 08:28:35,151 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 08:28:35,151 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 08:28:35,151 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 08:28:35,152 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:28:34" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 08:28:35,266 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 08:28:35,267 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 08:28:35,267 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 08:28:35,268 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 08:28:36,597 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 08:28:36,598 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 08:28:36,600 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:28:36 BoogieIcfgContainer [2020-12-22 08:28:36,600 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 08:28:36,602 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 08:28:36,602 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 08:28:36,606 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 08:28:36,606 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 08:28:33" (1/3) ... [2020-12-22 08:28:36,607 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7eed90bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:28:36, skipping insertion in model container [2020-12-22 08:28:36,607 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:28:34" (2/3) ... [2020-12-22 08:28:36,607 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7eed90bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:28:36, skipping insertion in model container [2020-12-22 08:28:36,608 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:28:36" (3/3) ... [2020-12-22 08:28:36,609 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2020-12-22 08:28:36,615 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 08:28:36,621 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 08:28:36,639 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 08:28:36,691 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 08:28:36,691 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 08:28:36,692 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 08:28:36,692 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 08:28:36,692 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 08:28:36,692 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 08:28:36,692 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 08:28:36,693 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 08:28:36,718 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states. [2020-12-22 08:28:36,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-12-22 08:28:36,735 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:28:36,736 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] [2020-12-22 08:28:36,737 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:28:36,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:28:36,743 INFO L82 PathProgramCache]: Analyzing trace with hash -1653668950, now seen corresponding path program 1 times [2020-12-22 08:28:36,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:28:36,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681646185] [2020-12-22 08:28:36,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:28:36,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:28:37,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:28:37,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681646185] [2020-12-22 08:28:37,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:28:37,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:28:37,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852666128] [2020-12-22 08:28:37,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:28:37,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:28:37,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:28:37,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:28:37,269 INFO L87 Difference]: Start difference. First operand 406 states. Second operand 4 states. [2020-12-22 08:28:37,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:28:37,509 INFO L93 Difference]: Finished difference Result 784 states and 1270 transitions. [2020-12-22 08:28:37,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:28:37,511 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 103 [2020-12-22 08:28:37,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:28:37,527 INFO L225 Difference]: With dead ends: 784 [2020-12-22 08:28:37,528 INFO L226 Difference]: Without dead ends: 403 [2020-12-22 08:28:37,533 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:28:37,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2020-12-22 08:28:37,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 403. [2020-12-22 08:28:37,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 403 states. [2020-12-22 08:28:37,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 623 transitions. [2020-12-22 08:28:37,612 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 623 transitions. Word has length 103 [2020-12-22 08:28:37,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:28:37,613 INFO L481 AbstractCegarLoop]: Abstraction has 403 states and 623 transitions. [2020-12-22 08:28:37,613 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:28:37,613 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 623 transitions. [2020-12-22 08:28:37,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-12-22 08:28:37,623 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:28:37,624 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:28:37,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 08:28:37,625 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:28:37,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:28:37,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1984435279, now seen corresponding path program 1 times [2020-12-22 08:28:37,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:28:37,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161351556] [2020-12-22 08:28:37,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:28:37,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:28:37,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:28:37,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161351556] [2020-12-22 08:28:37,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:28:37,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:28:37,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485416721] [2020-12-22 08:28:37,848 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:28:37,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:28:37,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:28:37,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:28:37,850 INFO L87 Difference]: Start difference. First operand 403 states and 623 transitions. Second operand 3 states. [2020-12-22 08:28:37,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:28:37,946 INFO L93 Difference]: Finished difference Result 952 states and 1499 transitions. [2020-12-22 08:28:37,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:28:37,946 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 134 [2020-12-22 08:28:37,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:28:37,953 INFO L225 Difference]: With dead ends: 952 [2020-12-22 08:28:37,953 INFO L226 Difference]: Without dead ends: 611 [2020-12-22 08:28:37,958 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:28:37,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2020-12-22 08:28:38,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 609. [2020-12-22 08:28:38,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 609 states. [2020-12-22 08:28:38,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 609 states to 609 states and 949 transitions. [2020-12-22 08:28:38,021 INFO L78 Accepts]: Start accepts. Automaton has 609 states and 949 transitions. Word has length 134 [2020-12-22 08:28:38,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:28:38,024 INFO L481 AbstractCegarLoop]: Abstraction has 609 states and 949 transitions. [2020-12-22 08:28:38,024 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:28:38,025 INFO L276 IsEmpty]: Start isEmpty. Operand 609 states and 949 transitions. [2020-12-22 08:28:38,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-12-22 08:28:38,031 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:28:38,031 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:28:38,032 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 08:28:38,032 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:28:38,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:28:38,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1203481045, now seen corresponding path program 1 times [2020-12-22 08:28:38,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:28:38,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940077997] [2020-12-22 08:28:38,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:28:38,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:28:38,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:28:38,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940077997] [2020-12-22 08:28:38,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:28:38,193 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:28:38,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935478960] [2020-12-22 08:28:38,195 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:28:38,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:28:38,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:28:38,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:28:38,200 INFO L87 Difference]: Start difference. First operand 609 states and 949 transitions. Second operand 3 states. [2020-12-22 08:28:38,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:28:38,284 INFO L93 Difference]: Finished difference Result 1494 states and 2358 transitions. [2020-12-22 08:28:38,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:28:38,284 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 136 [2020-12-22 08:28:38,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:28:38,290 INFO L225 Difference]: With dead ends: 1494 [2020-12-22 08:28:38,291 INFO L226 Difference]: Without dead ends: 960 [2020-12-22 08:28:38,292 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:28:38,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 960 states. [2020-12-22 08:28:38,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 960 to 958. [2020-12-22 08:28:38,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 958 states. [2020-12-22 08:28:38,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 958 states to 958 states and 1499 transitions. [2020-12-22 08:28:38,334 INFO L78 Accepts]: Start accepts. Automaton has 958 states and 1499 transitions. Word has length 136 [2020-12-22 08:28:38,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:28:38,335 INFO L481 AbstractCegarLoop]: Abstraction has 958 states and 1499 transitions. [2020-12-22 08:28:38,335 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:28:38,335 INFO L276 IsEmpty]: Start isEmpty. Operand 958 states and 1499 transitions. [2020-12-22 08:28:38,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-22 08:28:38,338 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:28:38,339 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:28:38,339 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 08:28:38,339 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:28:38,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:28:38,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1755736889, now seen corresponding path program 1 times [2020-12-22 08:28:38,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:28:38,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840099532] [2020-12-22 08:28:38,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:28:38,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:28:38,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:28:38,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840099532] [2020-12-22 08:28:38,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:28:38,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:28:38,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627463144] [2020-12-22 08:28:38,451 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:28:38,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:28:38,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:28:38,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:28:38,452 INFO L87 Difference]: Start difference. First operand 958 states and 1499 transitions. Second operand 3 states. [2020-12-22 08:28:38,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:28:38,575 INFO L93 Difference]: Finished difference Result 2397 states and 3779 transitions. [2020-12-22 08:28:38,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:28:38,576 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 138 [2020-12-22 08:28:38,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:28:38,588 INFO L225 Difference]: With dead ends: 2397 [2020-12-22 08:28:38,588 INFO L226 Difference]: Without dead ends: 1527 [2020-12-22 08:28:38,590 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:28:38,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1527 states. [2020-12-22 08:28:38,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1527 to 1525. [2020-12-22 08:28:38,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1525 states. [2020-12-22 08:28:38,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1525 states to 1525 states and 2385 transitions. [2020-12-22 08:28:38,666 INFO L78 Accepts]: Start accepts. Automaton has 1525 states and 2385 transitions. Word has length 138 [2020-12-22 08:28:38,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:28:38,667 INFO L481 AbstractCegarLoop]: Abstraction has 1525 states and 2385 transitions. [2020-12-22 08:28:38,667 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:28:38,667 INFO L276 IsEmpty]: Start isEmpty. Operand 1525 states and 2385 transitions. [2020-12-22 08:28:38,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-12-22 08:28:38,673 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:28:38,673 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:28:38,673 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 08:28:38,673 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:28:38,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:28:38,674 INFO L82 PathProgramCache]: Analyzing trace with hash -175339215, now seen corresponding path program 1 times [2020-12-22 08:28:38,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:28:38,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689155010] [2020-12-22 08:28:38,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:28:38,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:28:38,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:28:38,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689155010] [2020-12-22 08:28:38,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:28:38,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:28:38,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306698783] [2020-12-22 08:28:38,781 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:28:38,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:28:38,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:28:38,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:28:38,783 INFO L87 Difference]: Start difference. First operand 1525 states and 2385 transitions. Second operand 3 states. [2020-12-22 08:28:39,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:28:39,004 INFO L93 Difference]: Finished difference Result 3818 states and 5988 transitions. [2020-12-22 08:28:39,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:28:39,007 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 140 [2020-12-22 08:28:39,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:28:39,027 INFO L225 Difference]: With dead ends: 3818 [2020-12-22 08:28:39,027 INFO L226 Difference]: Without dead ends: 2394 [2020-12-22 08:28:39,029 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 08:28:39,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2394 states. [2020-12-22 08:28:39,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2394 to 2392. [2020-12-22 08:28:39,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2392 states. [2020-12-22 08:28:39,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2392 states to 2392 states and 3719 transitions. [2020-12-22 08:28:39,196 INFO L78 Accepts]: Start accepts. Automaton has 2392 states and 3719 transitions. Word has length 140 [2020-12-22 08:28:39,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:28:39,197 INFO L481 AbstractCegarLoop]: Abstraction has 2392 states and 3719 transitions. [2020-12-22 08:28:39,197 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:28:39,197 INFO L276 IsEmpty]: Start isEmpty. Operand 2392 states and 3719 transitions. [2020-12-22 08:28:39,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-12-22 08:28:39,204 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:28:39,204 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:28:39,204 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 08:28:39,205 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:28:39,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:28:39,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1755218565, now seen corresponding path program 1 times [2020-12-22 08:28:39,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:28:39,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318902549] [2020-12-22 08:28:39,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:28:39,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:28:39,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:28:39,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318902549] [2020-12-22 08:28:39,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:28:39,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 08:28:39,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90689962] [2020-12-22 08:28:39,590 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 08:28:39,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:28:39,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 08:28:39,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:28:39,592 INFO L87 Difference]: Start difference. First operand 2392 states and 3719 transitions. Second operand 7 states. [2020-12-22 08:28:40,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:28:40,785 INFO L93 Difference]: Finished difference Result 12294 states and 19063 transitions. [2020-12-22 08:28:40,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 08:28:40,786 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 142 [2020-12-22 08:28:40,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:28:40,836 INFO L225 Difference]: With dead ends: 12294 [2020-12-22 08:28:40,837 INFO L226 Difference]: Without dead ends: 9997 [2020-12-22 08:28:40,843 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:28:40,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9997 states. [2020-12-22 08:28:41,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9997 to 9989. [2020-12-22 08:28:41,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9989 states. [2020-12-22 08:28:41,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9989 states to 9989 states and 15415 transitions. [2020-12-22 08:28:41,605 INFO L78 Accepts]: Start accepts. Automaton has 9989 states and 15415 transitions. Word has length 142 [2020-12-22 08:28:41,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:28:41,607 INFO L481 AbstractCegarLoop]: Abstraction has 9989 states and 15415 transitions. [2020-12-22 08:28:41,607 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 08:28:41,607 INFO L276 IsEmpty]: Start isEmpty. Operand 9989 states and 15415 transitions. [2020-12-22 08:28:41,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-12-22 08:28:41,634 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:28:41,634 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:28:41,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 08:28:41,635 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:28:41,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:28:41,636 INFO L82 PathProgramCache]: Analyzing trace with hash -1313449698, now seen corresponding path program 1 times [2020-12-22 08:28:41,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:28:41,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957643984] [2020-12-22 08:28:41,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:28:41,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:28:41,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:28:41,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957643984] [2020-12-22 08:28:41,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:28:41,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:28:41,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508309148] [2020-12-22 08:28:41,773 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:28:41,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:28:41,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:28:41,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:28:41,774 INFO L87 Difference]: Start difference. First operand 9989 states and 15415 transitions. Second operand 3 states. [2020-12-22 08:28:42,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:28:42,873 INFO L93 Difference]: Finished difference Result 27870 states and 42897 transitions. [2020-12-22 08:28:42,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:28:42,874 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 142 [2020-12-22 08:28:42,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:28:42,943 INFO L225 Difference]: With dead ends: 27870 [2020-12-22 08:28:42,943 INFO L226 Difference]: Without dead ends: 17926 [2020-12-22 08:28:42,960 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:28:42,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17926 states. [2020-12-22 08:28:44,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17926 to 17924. [2020-12-22 08:28:44,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17924 states. [2020-12-22 08:28:44,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17924 states to 17924 states and 27369 transitions. [2020-12-22 08:28:44,261 INFO L78 Accepts]: Start accepts. Automaton has 17924 states and 27369 transitions. Word has length 142 [2020-12-22 08:28:44,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:28:44,262 INFO L481 AbstractCegarLoop]: Abstraction has 17924 states and 27369 transitions. [2020-12-22 08:28:44,262 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:28:44,262 INFO L276 IsEmpty]: Start isEmpty. Operand 17924 states and 27369 transitions. [2020-12-22 08:28:44,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-12-22 08:28:44,308 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:28:44,308 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] [2020-12-22 08:28:44,308 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 08:28:44,309 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:28:44,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:28:44,310 INFO L82 PathProgramCache]: Analyzing trace with hash 250002854, now seen corresponding path program 1 times [2020-12-22 08:28:44,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:28:44,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096112452] [2020-12-22 08:28:44,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:28:44,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:28:44,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:28:44,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096112452] [2020-12-22 08:28:44,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:28:44,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:28:44,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458084159] [2020-12-22 08:28:44,500 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:28:44,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:28:44,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:28:44,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:28:44,501 INFO L87 Difference]: Start difference. First operand 17924 states and 27369 transitions. Second operand 3 states. [2020-12-22 08:28:46,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:28:46,084 INFO L93 Difference]: Finished difference Result 40781 states and 62231 transitions. [2020-12-22 08:28:46,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:28:46,085 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 145 [2020-12-22 08:28:46,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:28:46,157 INFO L225 Difference]: With dead ends: 40781 [2020-12-22 08:28:46,157 INFO L226 Difference]: Without dead ends: 29717 [2020-12-22 08:28:46,177 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:28:46,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29717 states. [2020-12-22 08:28:47,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29717 to 29715. [2020-12-22 08:28:47,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29715 states. [2020-12-22 08:28:48,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29715 states to 29715 states and 45013 transitions. [2020-12-22 08:28:48,059 INFO L78 Accepts]: Start accepts. Automaton has 29715 states and 45013 transitions. Word has length 145 [2020-12-22 08:28:48,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:28:48,059 INFO L481 AbstractCegarLoop]: Abstraction has 29715 states and 45013 transitions. [2020-12-22 08:28:48,059 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:28:48,059 INFO L276 IsEmpty]: Start isEmpty. Operand 29715 states and 45013 transitions. [2020-12-22 08:28:48,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-12-22 08:28:48,140 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:28:48,140 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] [2020-12-22 08:28:48,140 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 08:28:48,140 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:28:48,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:28:48,141 INFO L82 PathProgramCache]: Analyzing trace with hash 697416788, now seen corresponding path program 1 times [2020-12-22 08:28:48,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:28:48,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842079504] [2020-12-22 08:28:48,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:28:48,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:28:48,373 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 08:28:48,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842079504] [2020-12-22 08:28:48,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:28:48,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:28:48,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740881141] [2020-12-22 08:28:48,375 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:28:48,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:28:48,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:28:48,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:28:48,376 INFO L87 Difference]: Start difference. First operand 29715 states and 45013 transitions. Second operand 3 states. [2020-12-22 08:28:49,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:28:49,899 INFO L93 Difference]: Finished difference Result 59059 states and 89309 transitions. [2020-12-22 08:28:49,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:28:49,900 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 145 [2020-12-22 08:28:49,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:28:50,011 INFO L225 Difference]: With dead ends: 59059 [2020-12-22 08:28:50,011 INFO L226 Difference]: Without dead ends: 44785 [2020-12-22 08:28:50,035 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:28:50,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44785 states. [2020-12-22 08:28:52,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44785 to 44783. [2020-12-22 08:28:52,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44783 states. [2020-12-22 08:28:52,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44783 states to 44783 states and 67243 transitions. [2020-12-22 08:28:52,696 INFO L78 Accepts]: Start accepts. Automaton has 44783 states and 67243 transitions. Word has length 145 [2020-12-22 08:28:52,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:28:52,696 INFO L481 AbstractCegarLoop]: Abstraction has 44783 states and 67243 transitions. [2020-12-22 08:28:52,696 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:28:52,696 INFO L276 IsEmpty]: Start isEmpty. Operand 44783 states and 67243 transitions. [2020-12-22 08:28:52,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-12-22 08:28:52,756 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:28:52,757 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] [2020-12-22 08:28:52,757 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 08:28:52,757 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:28:52,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:28:52,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1323599646, now seen corresponding path program 1 times [2020-12-22 08:28:52,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:28:52,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445821547] [2020-12-22 08:28:52,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:28:52,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:28:52,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:28:52,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445821547] [2020-12-22 08:28:52,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:28:52,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:28:52,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341349444] [2020-12-22 08:28:52,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:28:52,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:28:52,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:28:52,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:28:52,855 INFO L87 Difference]: Start difference. First operand 44783 states and 67243 transitions. Second operand 3 states. [2020-12-22 08:28:55,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:28:55,575 INFO L93 Difference]: Finished difference Result 117738 states and 176311 transitions. [2020-12-22 08:28:55,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:28:55,575 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 146 [2020-12-22 08:28:55,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:28:55,703 INFO L225 Difference]: With dead ends: 117738 [2020-12-22 08:28:55,703 INFO L226 Difference]: Without dead ends: 76666 [2020-12-22 08:28:55,760 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:28:55,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76666 states. [2020-12-22 08:28:59,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76666 to 76664. [2020-12-22 08:28:59,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76664 states. [2020-12-22 08:28:59,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76664 states to 76664 states and 113897 transitions. [2020-12-22 08:28:59,282 INFO L78 Accepts]: Start accepts. Automaton has 76664 states and 113897 transitions. Word has length 146 [2020-12-22 08:28:59,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:28:59,282 INFO L481 AbstractCegarLoop]: Abstraction has 76664 states and 113897 transitions. [2020-12-22 08:28:59,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:28:59,283 INFO L276 IsEmpty]: Start isEmpty. Operand 76664 states and 113897 transitions. [2020-12-22 08:28:59,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-12-22 08:28:59,377 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:28:59,377 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] [2020-12-22 08:28:59,377 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 08:28:59,377 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:28:59,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:28:59,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1463665047, now seen corresponding path program 1 times [2020-12-22 08:28:59,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:28:59,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015392203] [2020-12-22 08:28:59,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:28:59,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:28:59,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:28:59,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015392203] [2020-12-22 08:28:59,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:28:59,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:28:59,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694258462] [2020-12-22 08:28:59,497 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:28:59,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:28:59,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:28:59,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:28:59,498 INFO L87 Difference]: Start difference. First operand 76664 states and 113897 transitions. Second operand 6 states. [2020-12-22 08:29:07,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:29:07,255 INFO L93 Difference]: Finished difference Result 257869 states and 381684 transitions. [2020-12-22 08:29:07,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:29:07,256 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 146 [2020-12-22 08:29:07,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:29:07,687 INFO L225 Difference]: With dead ends: 257869 [2020-12-22 08:29:07,687 INFO L226 Difference]: Without dead ends: 181266 [2020-12-22 08:29:07,771 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-12-22 08:29:07,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181266 states. [2020-12-22 08:29:15,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181266 to 160238. [2020-12-22 08:29:15,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160238 states. [2020-12-22 08:29:15,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160238 states to 160238 states and 236203 transitions. [2020-12-22 08:29:15,954 INFO L78 Accepts]: Start accepts. Automaton has 160238 states and 236203 transitions. Word has length 146 [2020-12-22 08:29:15,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:29:15,955 INFO L481 AbstractCegarLoop]: Abstraction has 160238 states and 236203 transitions. [2020-12-22 08:29:15,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:29:15,955 INFO L276 IsEmpty]: Start isEmpty. Operand 160238 states and 236203 transitions. [2020-12-22 08:29:16,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-12-22 08:29:16,102 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:29:16,102 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] [2020-12-22 08:29:16,102 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 08:29:16,102 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:29:16,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:29:16,103 INFO L82 PathProgramCache]: Analyzing trace with hash 827036191, now seen corresponding path program 1 times [2020-12-22 08:29:16,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:29:16,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141023211] [2020-12-22 08:29:16,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:29:16,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:29:16,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:29:16,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141023211] [2020-12-22 08:29:16,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:29:16,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 08:29:16,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952398667] [2020-12-22 08:29:16,249 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 08:29:16,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:29:16,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 08:29:16,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:29:16,250 INFO L87 Difference]: Start difference. First operand 160238 states and 236203 transitions. Second operand 7 states. [2020-12-22 08:29:38,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:29:38,074 INFO L93 Difference]: Finished difference Result 654755 states and 960716 transitions. [2020-12-22 08:29:38,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 08:29:38,075 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 146 [2020-12-22 08:29:38,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:29:39,045 INFO L225 Difference]: With dead ends: 654755 [2020-12-22 08:29:39,045 INFO L226 Difference]: Without dead ends: 495028 [2020-12-22 08:29:39,289 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-12-22 08:29:39,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495028 states. [2020-12-22 08:29:57,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495028 to 307956. [2020-12-22 08:29:57,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 307956 states. [2020-12-22 08:29:58,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307956 states to 307956 states and 443956 transitions. [2020-12-22 08:29:58,872 INFO L78 Accepts]: Start accepts. Automaton has 307956 states and 443956 transitions. Word has length 146 [2020-12-22 08:29:58,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:29:58,873 INFO L481 AbstractCegarLoop]: Abstraction has 307956 states and 443956 transitions. [2020-12-22 08:29:58,873 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 08:29:58,873 INFO L276 IsEmpty]: Start isEmpty. Operand 307956 states and 443956 transitions. [2020-12-22 08:29:59,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-12-22 08:29:59,844 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:29:59,844 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] [2020-12-22 08:29:59,844 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 08:29:59,844 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:29:59,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:29:59,845 INFO L82 PathProgramCache]: Analyzing trace with hash 379942309, now seen corresponding path program 1 times [2020-12-22 08:29:59,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:29:59,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948144719] [2020-12-22 08:29:59,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:29:59,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:30:00,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:30:00,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948144719] [2020-12-22 08:30:00,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:30:00,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 08:30:00,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839819157] [2020-12-22 08:30:00,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 08:30:00,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:30:00,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 08:30:00,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:30:00,033 INFO L87 Difference]: Start difference. First operand 307956 states and 443956 transitions. Second operand 7 states. [2020-12-22 08:30:26,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:30:26,084 INFO L93 Difference]: Finished difference Result 536870 states and 776535 transitions. [2020-12-22 08:30:26,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 08:30:26,084 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 150 [2020-12-22 08:30:26,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:30:27,110 INFO L225 Difference]: With dead ends: 536870 [2020-12-22 08:30:27,110 INFO L226 Difference]: Without dead ends: 495028 [2020-12-22 08:30:27,307 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 08:30:27,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495028 states. [2020-12-22 08:30:53,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495028 to 352062. [2020-12-22 08:30:53,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352062 states. [2020-12-22 08:30:55,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352062 states to 352062 states and 506861 transitions. [2020-12-22 08:30:55,178 INFO L78 Accepts]: Start accepts. Automaton has 352062 states and 506861 transitions. Word has length 150 [2020-12-22 08:30:55,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:30:55,178 INFO L481 AbstractCegarLoop]: Abstraction has 352062 states and 506861 transitions. [2020-12-22 08:30:55,186 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 08:30:55,186 INFO L276 IsEmpty]: Start isEmpty. Operand 352062 states and 506861 transitions. [2020-12-22 08:30:55,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-12-22 08:30:55,555 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:30:55,556 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] [2020-12-22 08:30:55,556 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 08:30:55,556 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:30:55,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:30:55,557 INFO L82 PathProgramCache]: Analyzing trace with hash 666561917, now seen corresponding path program 1 times [2020-12-22 08:30:55,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:30:55,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466196726] [2020-12-22 08:30:55,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:30:55,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:30:55,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:30:55,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466196726] [2020-12-22 08:30:55,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:30:55,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:30:55,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067448738] [2020-12-22 08:30:55,635 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:30:55,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:30:55,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:30:55,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:30:55,636 INFO L87 Difference]: Start difference. First operand 352062 states and 506861 transitions. Second operand 3 states. [2020-12-22 08:31:12,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:31:12,642 INFO L93 Difference]: Finished difference Result 596036 states and 858399 transitions. [2020-12-22 08:31:12,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:31:12,643 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 150 [2020-12-22 08:31:12,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:31:13,206 INFO L225 Difference]: With dead ends: 596036 [2020-12-22 08:31:13,206 INFO L226 Difference]: Without dead ends: 270550 [2020-12-22 08:31:13,495 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:31:13,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270550 states. [2020-12-22 08:31:30,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270550 to 270548. [2020-12-22 08:31:30,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270548 states. [2020-12-22 08:31:31,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270548 states to 270548 states and 387256 transitions. [2020-12-22 08:31:31,613 INFO L78 Accepts]: Start accepts. Automaton has 270548 states and 387256 transitions. Word has length 150 [2020-12-22 08:31:31,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:31:31,614 INFO L481 AbstractCegarLoop]: Abstraction has 270548 states and 387256 transitions. [2020-12-22 08:31:31,614 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:31:31,614 INFO L276 IsEmpty]: Start isEmpty. Operand 270548 states and 387256 transitions. [2020-12-22 08:31:31,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-12-22 08:31:31,791 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:31:31,792 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] [2020-12-22 08:31:31,792 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 08:31:31,792 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:31:31,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:31:31,795 INFO L82 PathProgramCache]: Analyzing trace with hash 638258981, now seen corresponding path program 1 times [2020-12-22 08:31:31,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:31:31,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119653845] [2020-12-22 08:31:31,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:31:31,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:31:31,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:31:31,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119653845] [2020-12-22 08:31:31,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:31:31,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:31:31,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099040148] [2020-12-22 08:31:31,910 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:31:31,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:31:31,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:31:31,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:31:31,911 INFO L87 Difference]: Start difference. First operand 270548 states and 387256 transitions. Second operand 6 states. [2020-12-22 08:32:02,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:32:02,133 INFO L93 Difference]: Finished difference Result 463814 states and 661193 transitions. [2020-12-22 08:32:02,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 08:32:02,133 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 150 [2020-12-22 08:32:02,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:32:02,915 INFO L225 Difference]: With dead ends: 463814 [2020-12-22 08:32:02,916 INFO L226 Difference]: Without dead ends: 463812 [2020-12-22 08:32:03,040 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-12-22 08:32:03,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463812 states.