/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/seq-mthreaded/pals_floodmax.5.2.ufo.BOUNDED-10.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 07:24:16,874 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 07:24:16,878 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 07:24:16,934 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 07:24:16,934 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 07:24:16,938 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 07:24:16,942 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 07:24:16,948 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 07:24:16,955 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 07:24:16,963 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 07:24:16,964 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 07:24:16,966 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 07:24:16,968 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 07:24:16,970 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 07:24:16,973 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 07:24:16,975 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 07:24:16,990 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 07:24:16,994 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 07:24:17,002 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 07:24:17,005 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 07:24:17,007 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 07:24:17,014 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 07:24:17,016 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 07:24:17,017 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 07:24:17,021 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 07:24:17,025 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 07:24:17,026 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 07:24:17,027 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 07:24:17,028 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 07:24:17,029 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 07:24:17,030 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 07:24:17,030 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 07:24:17,031 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 07:24:17,031 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 07:24:17,032 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 07:24:17,033 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 07:24:17,034 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 07:24:17,063 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 07:24:17,063 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 07:24:17,065 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 07:24:17,065 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 07:24:17,065 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 07:24:17,065 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 07:24:17,066 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 07:24:17,066 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 07:24:17,066 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 07:24:17,066 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 07:24:17,067 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 07:24:17,067 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 07:24:17,067 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 07:24:17,067 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 07:24:17,068 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 07:24:17,068 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 07:24:17,068 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 07:24:17,068 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:24:17,068 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 07:24:17,069 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 07:24:17,069 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 07:24:17,069 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 07:24:17,069 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 07:24:17,070 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 07:24:17,070 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 07:24:17,070 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 07:24:17,444 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 07:24:17,471 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 07:24:17,474 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 07:24:17,475 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 07:24:17,476 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 07:24:17,477 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_floodmax.5.2.ufo.BOUNDED-10.pals.c [2020-12-22 07:24:17,575 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6cb9f8203/3e7561200fd144569a2129225f09319e/FLAGce50017e0 [2020-12-22 07:24:18,392 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 07:24:18,393 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_floodmax.5.2.ufo.BOUNDED-10.pals.c [2020-12-22 07:24:18,425 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6cb9f8203/3e7561200fd144569a2129225f09319e/FLAGce50017e0 [2020-12-22 07:24:18,603 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6cb9f8203/3e7561200fd144569a2129225f09319e [2020-12-22 07:24:18,606 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 07:24:18,608 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 07:24:18,611 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 07:24:18,611 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 07:24:18,615 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 07:24:18,616 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:24:18" (1/1) ... [2020-12-22 07:24:18,619 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46457d12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:18, skipping insertion in model container [2020-12-22 07:24:18,619 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:24:18" (1/1) ... [2020-12-22 07:24:18,627 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 07:24:18,719 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 07:24:19,353 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_floodmax.5.2.ufo.BOUNDED-10.pals.c[60917,60930] [2020-12-22 07:24:19,358 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:24:19,375 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 07:24:19,531 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_floodmax.5.2.ufo.BOUNDED-10.pals.c[60917,60930] [2020-12-22 07:24:19,531 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:24:19,555 INFO L208 MainTranslator]: Completed translation [2020-12-22 07:24:19,556 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:19 WrapperNode [2020-12-22 07:24:19,556 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 07:24:19,558 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 07:24:19,558 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 07:24:19,558 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 07:24:19,568 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:19" (1/1) ... [2020-12-22 07:24:19,593 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:19" (1/1) ... [2020-12-22 07:24:19,683 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 07:24:19,684 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 07:24:19,684 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 07:24:19,684 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 07:24:19,695 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:19" (1/1) ... [2020-12-22 07:24:19,696 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:19" (1/1) ... [2020-12-22 07:24:19,704 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:19" (1/1) ... [2020-12-22 07:24:19,705 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:19" (1/1) ... [2020-12-22 07:24:19,737 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:19" (1/1) ... [2020-12-22 07:24:19,777 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:19" (1/1) ... [2020-12-22 07:24:19,797 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:19" (1/1) ... [2020-12-22 07:24:19,821 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 07:24:19,823 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 07:24:19,823 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 07:24:19,823 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 07:24:19,825 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:19" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:24:19,954 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 07:24:19,954 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 07:24:19,955 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 07:24:19,955 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 07:24:22,454 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 07:24:22,454 INFO L299 CfgBuilder]: Removed 23 assume(true) statements. [2020-12-22 07:24:22,457 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:24:22 BoogieIcfgContainer [2020-12-22 07:24:22,457 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 07:24:22,459 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 07:24:22,459 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 07:24:22,463 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 07:24:22,463 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:24:18" (1/3) ... [2020-12-22 07:24:22,464 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e32a262 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:24:22, skipping insertion in model container [2020-12-22 07:24:22,464 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:19" (2/3) ... [2020-12-22 07:24:22,465 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e32a262 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:24:22, skipping insertion in model container [2020-12-22 07:24:22,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:24:22" (3/3) ... [2020-12-22 07:24:22,467 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.2.ufo.BOUNDED-10.pals.c [2020-12-22 07:24:22,474 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 07:24:22,480 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 07:24:22,501 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 07:24:22,534 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 07:24:22,534 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 07:24:22,534 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 07:24:22,535 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 07:24:22,535 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 07:24:22,535 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 07:24:22,535 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 07:24:22,535 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 07:24:22,569 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states. [2020-12-22 07:24:22,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-12-22 07:24:22,594 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:22,595 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:24:22,595 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:22,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:22,602 INFO L82 PathProgramCache]: Analyzing trace with hash -745157910, now seen corresponding path program 1 times [2020-12-22 07:24:22,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:22,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585028269] [2020-12-22 07:24:22,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:22,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:23,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:24:23,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585028269] [2020-12-22 07:24:23,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:23,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:24:23,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302512472] [2020-12-22 07:24:23,254 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 07:24:23,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:23,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 07:24:23,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:24:23,273 INFO L87 Difference]: Start difference. First operand 706 states. Second operand 2 states. [2020-12-22 07:24:23,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:23,346 INFO L93 Difference]: Finished difference Result 867 states and 1580 transitions. [2020-12-22 07:24:23,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 07:24:23,348 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 153 [2020-12-22 07:24:23,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:23,373 INFO L225 Difference]: With dead ends: 867 [2020-12-22 07:24:23,374 INFO L226 Difference]: Without dead ends: 702 [2020-12-22 07:24:23,379 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:24:23,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2020-12-22 07:24:23,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 702. [2020-12-22 07:24:23,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 702 states. [2020-12-22 07:24:23,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 702 states to 702 states and 1296 transitions. [2020-12-22 07:24:23,508 INFO L78 Accepts]: Start accepts. Automaton has 702 states and 1296 transitions. Word has length 153 [2020-12-22 07:24:23,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:23,510 INFO L481 AbstractCegarLoop]: Abstraction has 702 states and 1296 transitions. [2020-12-22 07:24:23,510 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 07:24:23,510 INFO L276 IsEmpty]: Start isEmpty. Operand 702 states and 1296 transitions. [2020-12-22 07:24:23,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-12-22 07:24:23,519 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:23,519 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:24:23,520 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 07:24:23,520 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:23,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:23,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1254631000, now seen corresponding path program 1 times [2020-12-22 07:24:23,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:23,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753086416] [2020-12-22 07:24:23,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:23,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:23,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:24:23,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753086416] [2020-12-22 07:24:23,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:23,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:24:23,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322144563] [2020-12-22 07:24:23,902 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:24:23,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:23,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:24:23,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:24:23,904 INFO L87 Difference]: Start difference. First operand 702 states and 1296 transitions. Second operand 5 states. [2020-12-22 07:24:24,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:24,182 INFO L93 Difference]: Finished difference Result 862 states and 1570 transitions. [2020-12-22 07:24:24,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 07:24:24,183 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 153 [2020-12-22 07:24:24,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:24,192 INFO L225 Difference]: With dead ends: 862 [2020-12-22 07:24:24,192 INFO L226 Difference]: Without dead ends: 702 [2020-12-22 07:24:24,198 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:24:24,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2020-12-22 07:24:24,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 702. [2020-12-22 07:24:24,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 702 states. [2020-12-22 07:24:24,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 702 states to 702 states and 1236 transitions. [2020-12-22 07:24:24,241 INFO L78 Accepts]: Start accepts. Automaton has 702 states and 1236 transitions. Word has length 153 [2020-12-22 07:24:24,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:24,244 INFO L481 AbstractCegarLoop]: Abstraction has 702 states and 1236 transitions. [2020-12-22 07:24:24,244 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:24:24,244 INFO L276 IsEmpty]: Start isEmpty. Operand 702 states and 1236 transitions. [2020-12-22 07:24:24,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2020-12-22 07:24:24,254 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:24,254 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:24:24,255 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 07:24:24,256 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:24,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:24,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1674803025, now seen corresponding path program 1 times [2020-12-22 07:24:24,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:24,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749825410] [2020-12-22 07:24:24,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:24,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:24,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:24:24,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749825410] [2020-12-22 07:24:24,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:24,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:24:24,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302293451] [2020-12-22 07:24:24,628 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:24:24,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:24,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:24:24,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:24:24,633 INFO L87 Difference]: Start difference. First operand 702 states and 1236 transitions. Second operand 3 states. [2020-12-22 07:24:24,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:24,701 INFO L93 Difference]: Finished difference Result 1001 states and 1751 transitions. [2020-12-22 07:24:24,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:24:24,702 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 212 [2020-12-22 07:24:24,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:24,709 INFO L225 Difference]: With dead ends: 1001 [2020-12-22 07:24:24,710 INFO L226 Difference]: Without dead ends: 845 [2020-12-22 07:24:24,712 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:24:24,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 845 states. [2020-12-22 07:24:24,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 845 to 843. [2020-12-22 07:24:24,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 843 states. [2020-12-22 07:24:24,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 843 states to 843 states and 1475 transitions. [2020-12-22 07:24:24,771 INFO L78 Accepts]: Start accepts. Automaton has 843 states and 1475 transitions. Word has length 212 [2020-12-22 07:24:24,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:24,775 INFO L481 AbstractCegarLoop]: Abstraction has 843 states and 1475 transitions. [2020-12-22 07:24:24,775 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:24:24,775 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states and 1475 transitions. [2020-12-22 07:24:24,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2020-12-22 07:24:24,780 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:24,780 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:24:24,780 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 07:24:24,781 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:24,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:24,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1449767861, now seen corresponding path program 1 times [2020-12-22 07:24:24,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:24,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874012068] [2020-12-22 07:24:24,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:24,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:25,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:24:25,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874012068] [2020-12-22 07:24:25,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:25,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:24:25,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227500927] [2020-12-22 07:24:25,045 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:24:25,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:25,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:24:25,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:24:25,048 INFO L87 Difference]: Start difference. First operand 843 states and 1475 transitions. Second operand 3 states. [2020-12-22 07:24:25,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:25,096 INFO L93 Difference]: Finished difference Result 1415 states and 2451 transitions. [2020-12-22 07:24:25,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:24:25,097 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 216 [2020-12-22 07:24:25,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:25,103 INFO L225 Difference]: With dead ends: 1415 [2020-12-22 07:24:25,103 INFO L226 Difference]: Without dead ends: 1118 [2020-12-22 07:24:25,105 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:24:25,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1118 states. [2020-12-22 07:24:25,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1118 to 1116. [2020-12-22 07:24:25,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1116 states. [2020-12-22 07:24:25,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1116 states to 1116 states and 1939 transitions. [2020-12-22 07:24:25,137 INFO L78 Accepts]: Start accepts. Automaton has 1116 states and 1939 transitions. Word has length 216 [2020-12-22 07:24:25,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:25,138 INFO L481 AbstractCegarLoop]: Abstraction has 1116 states and 1939 transitions. [2020-12-22 07:24:25,138 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:24:25,138 INFO L276 IsEmpty]: Start isEmpty. Operand 1116 states and 1939 transitions. [2020-12-22 07:24:25,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2020-12-22 07:24:25,142 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:25,143 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:24:25,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 07:24:25,143 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:25,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:25,144 INFO L82 PathProgramCache]: Analyzing trace with hash 1203576295, now seen corresponding path program 1 times [2020-12-22 07:24:25,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:25,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963491321] [2020-12-22 07:24:25,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:25,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:25,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:24:25,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963491321] [2020-12-22 07:24:25,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:25,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:24:25,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108706732] [2020-12-22 07:24:25,346 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:24:25,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:25,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:24:25,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:24:25,347 INFO L87 Difference]: Start difference. First operand 1116 states and 1939 transitions. Second operand 3 states. [2020-12-22 07:24:25,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:25,402 INFO L93 Difference]: Finished difference Result 2212 states and 3801 transitions. [2020-12-22 07:24:25,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:24:25,402 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 220 [2020-12-22 07:24:25,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:25,412 INFO L225 Difference]: With dead ends: 2212 [2020-12-22 07:24:25,413 INFO L226 Difference]: Without dead ends: 1642 [2020-12-22 07:24:25,414 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:24:25,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1642 states. [2020-12-22 07:24:25,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1642 to 1640. [2020-12-22 07:24:25,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1640 states. [2020-12-22 07:24:25,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1640 states to 1640 states and 2823 transitions. [2020-12-22 07:24:25,466 INFO L78 Accepts]: Start accepts. Automaton has 1640 states and 2823 transitions. Word has length 220 [2020-12-22 07:24:25,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:25,467 INFO L481 AbstractCegarLoop]: Abstraction has 1640 states and 2823 transitions. [2020-12-22 07:24:25,467 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:24:25,467 INFO L276 IsEmpty]: Start isEmpty. Operand 1640 states and 2823 transitions. [2020-12-22 07:24:25,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2020-12-22 07:24:25,473 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:25,473 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:24:25,473 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 07:24:25,474 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:25,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:25,474 INFO L82 PathProgramCache]: Analyzing trace with hash -1763181181, now seen corresponding path program 1 times [2020-12-22 07:24:25,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:25,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698433279] [2020-12-22 07:24:25,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:25,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:25,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:24:25,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698433279] [2020-12-22 07:24:25,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:25,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:24:25,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014196474] [2020-12-22 07:24:25,807 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:24:25,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:25,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:24:25,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:24:25,808 INFO L87 Difference]: Start difference. First operand 1640 states and 2823 transitions. Second operand 3 states. [2020-12-22 07:24:25,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:25,901 INFO L93 Difference]: Finished difference Result 3740 states and 6369 transitions. [2020-12-22 07:24:25,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:24:25,902 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 224 [2020-12-22 07:24:25,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:25,917 INFO L225 Difference]: With dead ends: 3740 [2020-12-22 07:24:25,918 INFO L226 Difference]: Without dead ends: 2646 [2020-12-22 07:24:25,921 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:24:25,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2646 states. [2020-12-22 07:24:26,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2646 to 2644. [2020-12-22 07:24:26,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2644 states. [2020-12-22 07:24:26,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2644 states to 2644 states and 4503 transitions. [2020-12-22 07:24:26,017 INFO L78 Accepts]: Start accepts. Automaton has 2644 states and 4503 transitions. Word has length 224 [2020-12-22 07:24:26,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:26,018 INFO L481 AbstractCegarLoop]: Abstraction has 2644 states and 4503 transitions. [2020-12-22 07:24:26,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:24:26,019 INFO L276 IsEmpty]: Start isEmpty. Operand 2644 states and 4503 transitions. [2020-12-22 07:24:26,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2020-12-22 07:24:26,026 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:26,026 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:24:26,026 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 07:24:26,027 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:26,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:26,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1428296929, now seen corresponding path program 1 times [2020-12-22 07:24:26,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:26,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509536126] [2020-12-22 07:24:26,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:26,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:26,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:24:26,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509536126] [2020-12-22 07:24:26,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:26,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:24:26,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115324940] [2020-12-22 07:24:26,300 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:24:26,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:26,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:24:26,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:24:26,301 INFO L87 Difference]: Start difference. First operand 2644 states and 4503 transitions. Second operand 3 states. [2020-12-22 07:24:26,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:26,402 INFO L93 Difference]: Finished difference Result 6664 states and 11241 transitions. [2020-12-22 07:24:26,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:24:26,403 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 228 [2020-12-22 07:24:26,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:26,428 INFO L225 Difference]: With dead ends: 6664 [2020-12-22 07:24:26,428 INFO L226 Difference]: Without dead ends: 4566 [2020-12-22 07:24:26,437 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:24:26,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4566 states. [2020-12-22 07:24:26,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4566 to 4564. [2020-12-22 07:24:26,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4564 states. [2020-12-22 07:24:26,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4564 states to 4564 states and 7687 transitions. [2020-12-22 07:24:26,587 INFO L78 Accepts]: Start accepts. Automaton has 4564 states and 7687 transitions. Word has length 228 [2020-12-22 07:24:26,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:26,588 INFO L481 AbstractCegarLoop]: Abstraction has 4564 states and 7687 transitions. [2020-12-22 07:24:26,588 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:24:26,588 INFO L276 IsEmpty]: Start isEmpty. Operand 4564 states and 7687 transitions. [2020-12-22 07:24:26,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2020-12-22 07:24:26,594 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:26,595 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:24:26,595 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 07:24:26,595 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:26,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:26,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1256580795, now seen corresponding path program 1 times [2020-12-22 07:24:26,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:26,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484422968] [2020-12-22 07:24:26,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:26,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:26,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:24:26,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484422968] [2020-12-22 07:24:26,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:26,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 07:24:26,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525522976] [2020-12-22 07:24:26,921 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 07:24:26,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:26,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 07:24:26,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:24:26,922 INFO L87 Difference]: Start difference. First operand 4564 states and 7687 transitions. Second operand 7 states. [2020-12-22 07:24:27,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:27,707 INFO L93 Difference]: Finished difference Result 25254 states and 42608 transitions. [2020-12-22 07:24:27,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 07:24:27,708 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 232 [2020-12-22 07:24:27,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:27,801 INFO L225 Difference]: With dead ends: 25254 [2020-12-22 07:24:27,801 INFO L226 Difference]: Without dead ends: 21236 [2020-12-22 07:24:27,813 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2020-12-22 07:24:27,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21236 states. [2020-12-22 07:24:28,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21236 to 10425. [2020-12-22 07:24:28,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10425 states. [2020-12-22 07:24:28,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10425 states to 10425 states and 17552 transitions. [2020-12-22 07:24:28,240 INFO L78 Accepts]: Start accepts. Automaton has 10425 states and 17552 transitions. Word has length 232 [2020-12-22 07:24:28,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:28,241 INFO L481 AbstractCegarLoop]: Abstraction has 10425 states and 17552 transitions. [2020-12-22 07:24:28,241 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 07:24:28,241 INFO L276 IsEmpty]: Start isEmpty. Operand 10425 states and 17552 transitions. [2020-12-22 07:24:28,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2020-12-22 07:24:28,252 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:28,252 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:24:28,252 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 07:24:28,253 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:28,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:28,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1967080448, now seen corresponding path program 1 times [2020-12-22 07:24:28,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:28,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408336886] [2020-12-22 07:24:28,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:28,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:28,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:24:28,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408336886] [2020-12-22 07:24:28,538 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:28,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:24:28,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50015874] [2020-12-22 07:24:28,539 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:24:28,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:28,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:24:28,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:24:28,541 INFO L87 Difference]: Start difference. First operand 10425 states and 17552 transitions. Second operand 4 states. [2020-12-22 07:24:28,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:28,949 INFO L93 Difference]: Finished difference Result 24422 states and 41127 transitions. [2020-12-22 07:24:28,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:24:28,950 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 233 [2020-12-22 07:24:28,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:28,985 INFO L225 Difference]: With dead ends: 24422 [2020-12-22 07:24:28,985 INFO L226 Difference]: Without dead ends: 14543 [2020-12-22 07:24:28,998 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:24:29,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14543 states. [2020-12-22 07:24:29,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14543 to 14508. [2020-12-22 07:24:29,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14508 states. [2020-12-22 07:24:29,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14508 states to 14508 states and 24415 transitions. [2020-12-22 07:24:29,565 INFO L78 Accepts]: Start accepts. Automaton has 14508 states and 24415 transitions. Word has length 233 [2020-12-22 07:24:29,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:29,566 INFO L481 AbstractCegarLoop]: Abstraction has 14508 states and 24415 transitions. [2020-12-22 07:24:29,566 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:24:29,566 INFO L276 IsEmpty]: Start isEmpty. Operand 14508 states and 24415 transitions. [2020-12-22 07:24:29,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2020-12-22 07:24:29,580 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:29,581 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:24:29,581 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 07:24:29,581 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:29,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:29,582 INFO L82 PathProgramCache]: Analyzing trace with hash 159533448, now seen corresponding path program 1 times [2020-12-22 07:24:29,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:29,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733762835] [2020-12-22 07:24:29,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:29,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:29,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:24:29,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733762835] [2020-12-22 07:24:29,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:29,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:24:29,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388020594] [2020-12-22 07:24:29,848 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:24:29,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:29,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:24:29,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:24:29,849 INFO L87 Difference]: Start difference. First operand 14508 states and 24415 transitions. Second operand 3 states. [2020-12-22 07:24:30,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:30,230 INFO L93 Difference]: Finished difference Result 29224 states and 49193 transitions. [2020-12-22 07:24:30,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:24:30,231 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 233 [2020-12-22 07:24:30,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:30,293 INFO L225 Difference]: With dead ends: 29224 [2020-12-22 07:24:30,293 INFO L226 Difference]: Without dead ends: 21778 [2020-12-22 07:24:30,313 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:24:30,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21778 states. [2020-12-22 07:24:30,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21778 to 21776. [2020-12-22 07:24:30,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21776 states. [2020-12-22 07:24:31,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21776 states to 21776 states and 36490 transitions. [2020-12-22 07:24:31,041 INFO L78 Accepts]: Start accepts. Automaton has 21776 states and 36490 transitions. Word has length 233 [2020-12-22 07:24:31,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:31,042 INFO L481 AbstractCegarLoop]: Abstraction has 21776 states and 36490 transitions. [2020-12-22 07:24:31,042 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:24:31,042 INFO L276 IsEmpty]: Start isEmpty. Operand 21776 states and 36490 transitions. [2020-12-22 07:24:31,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2020-12-22 07:24:31,052 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:31,053 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:24:31,053 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 07:24:31,053 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:31,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:31,054 INFO L82 PathProgramCache]: Analyzing trace with hash 2066182408, now seen corresponding path program 1 times [2020-12-22 07:24:31,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:31,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456488792] [2020-12-22 07:24:31,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:31,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:31,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:24:31,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456488792] [2020-12-22 07:24:31,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:31,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:24:31,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016591310] [2020-12-22 07:24:31,359 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:24:31,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:31,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:24:31,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:24:31,361 INFO L87 Difference]: Start difference. First operand 21776 states and 36490 transitions. Second operand 3 states. [2020-12-22 07:24:31,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:31,915 INFO L93 Difference]: Finished difference Result 40920 states and 68668 transitions. [2020-12-22 07:24:31,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:24:31,916 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 233 [2020-12-22 07:24:31,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:32,008 INFO L225 Difference]: With dead ends: 40920 [2020-12-22 07:24:32,008 INFO L226 Difference]: Without dead ends: 29964 [2020-12-22 07:24:32,030 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:24:32,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29964 states. [2020-12-22 07:24:33,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29964 to 29962. [2020-12-22 07:24:33,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29962 states. [2020-12-22 07:24:33,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29962 states to 29962 states and 50037 transitions. [2020-12-22 07:24:33,354 INFO L78 Accepts]: Start accepts. Automaton has 29962 states and 50037 transitions. Word has length 233 [2020-12-22 07:24:33,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:33,355 INFO L481 AbstractCegarLoop]: Abstraction has 29962 states and 50037 transitions. [2020-12-22 07:24:33,355 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:24:33,355 INFO L276 IsEmpty]: Start isEmpty. Operand 29962 states and 50037 transitions. [2020-12-22 07:24:33,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2020-12-22 07:24:33,363 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:33,364 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:24:33,364 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 07:24:33,365 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:33,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:33,366 INFO L82 PathProgramCache]: Analyzing trace with hash 116201608, now seen corresponding path program 1 times [2020-12-22 07:24:33,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:33,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729422291] [2020-12-22 07:24:33,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:33,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:33,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:24:33,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729422291] [2020-12-22 07:24:33,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:33,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:24:33,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990055263] [2020-12-22 07:24:33,681 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:24:33,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:33,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:24:33,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:24:33,686 INFO L87 Difference]: Start difference. First operand 29962 states and 50037 transitions. Second operand 3 states. [2020-12-22 07:24:34,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:34,475 INFO L93 Difference]: Finished difference Result 57038 states and 95447 transitions. [2020-12-22 07:24:34,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:24:34,475 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 233 [2020-12-22 07:24:34,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:34,589 INFO L225 Difference]: With dead ends: 57038 [2020-12-22 07:24:34,589 INFO L226 Difference]: Without dead ends: 41549 [2020-12-22 07:24:34,738 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:24:34,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41549 states. [2020-12-22 07:24:35,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41549 to 41547. [2020-12-22 07:24:35,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41547 states. [2020-12-22 07:24:36,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41547 states to 41547 states and 69234 transitions. [2020-12-22 07:24:36,067 INFO L78 Accepts]: Start accepts. Automaton has 41547 states and 69234 transitions. Word has length 233 [2020-12-22 07:24:36,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:36,067 INFO L481 AbstractCegarLoop]: Abstraction has 41547 states and 69234 transitions. [2020-12-22 07:24:36,067 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:24:36,068 INFO L276 IsEmpty]: Start isEmpty. Operand 41547 states and 69234 transitions. [2020-12-22 07:24:36,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2020-12-22 07:24:36,073 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:36,073 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:24:36,074 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 07:24:36,074 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:36,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:36,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1001177080, now seen corresponding path program 1 times [2020-12-22 07:24:36,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:36,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91450245] [2020-12-22 07:24:36,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:36,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:36,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:24:36,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91450245] [2020-12-22 07:24:36,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:36,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:24:36,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829907531] [2020-12-22 07:24:36,385 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:24:36,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:36,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:24:36,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:24:36,389 INFO L87 Difference]: Start difference. First operand 41547 states and 69234 transitions. Second operand 3 states. [2020-12-22 07:24:37,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:37,322 INFO L93 Difference]: Finished difference Result 79702 states and 133064 transitions. [2020-12-22 07:24:37,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:24:37,322 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 233 [2020-12-22 07:24:37,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:37,451 INFO L225 Difference]: With dead ends: 79702 [2020-12-22 07:24:37,452 INFO L226 Difference]: Without dead ends: 57977 [2020-12-22 07:24:37,487 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:24:37,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57977 states. [2020-12-22 07:24:39,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57977 to 57975. [2020-12-22 07:24:39,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57975 states. [2020-12-22 07:24:39,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57975 states to 57975 states and 96360 transitions. [2020-12-22 07:24:39,474 INFO L78 Accepts]: Start accepts. Automaton has 57975 states and 96360 transitions. Word has length 233 [2020-12-22 07:24:39,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:39,475 INFO L481 AbstractCegarLoop]: Abstraction has 57975 states and 96360 transitions. [2020-12-22 07:24:39,475 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:24:39,475 INFO L276 IsEmpty]: Start isEmpty. Operand 57975 states and 96360 transitions. [2020-12-22 07:24:39,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2020-12-22 07:24:39,485 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:39,485 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:24:39,486 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 07:24:39,486 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:39,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:39,487 INFO L82 PathProgramCache]: Analyzing trace with hash 1255794568, now seen corresponding path program 1 times [2020-12-22 07:24:39,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:39,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684708930] [2020-12-22 07:24:39,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:39,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:39,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:24:39,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684708930] [2020-12-22 07:24:39,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:39,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:24:39,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888510840] [2020-12-22 07:24:39,665 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:24:39,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:39,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:24:39,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:24:39,666 INFO L87 Difference]: Start difference. First operand 57975 states and 96360 transitions. Second operand 3 states. [2020-12-22 07:24:41,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:41,319 INFO L93 Difference]: Finished difference Result 133163 states and 222144 transitions. [2020-12-22 07:24:41,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:24:41,319 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 233 [2020-12-22 07:24:41,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:41,494 INFO L225 Difference]: With dead ends: 133163 [2020-12-22 07:24:41,494 INFO L226 Difference]: Without dead ends: 90449 [2020-12-22 07:24:41,541 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:24:41,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90449 states. [2020-12-22 07:24:43,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90449 to 90447. [2020-12-22 07:24:43,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90447 states. [2020-12-22 07:24:44,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90447 states to 90447 states and 149897 transitions. [2020-12-22 07:24:44,122 INFO L78 Accepts]: Start accepts. Automaton has 90447 states and 149897 transitions. Word has length 233 [2020-12-22 07:24:44,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:44,123 INFO L481 AbstractCegarLoop]: Abstraction has 90447 states and 149897 transitions. [2020-12-22 07:24:44,123 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:24:44,123 INFO L276 IsEmpty]: Start isEmpty. Operand 90447 states and 149897 transitions. [2020-12-22 07:24:44,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2020-12-22 07:24:44,127 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:44,127 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:24:44,127 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 07:24:44,128 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:44,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:44,128 INFO L82 PathProgramCache]: Analyzing trace with hash 1347640466, now seen corresponding path program 1 times [2020-12-22 07:24:44,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:44,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064517358] [2020-12-22 07:24:44,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:44,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:44,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:24:44,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064517358] [2020-12-22 07:24:44,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:44,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:24:44,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272567170] [2020-12-22 07:24:44,336 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:24:44,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:44,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:24:44,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:24:44,338 INFO L87 Difference]: Start difference. First operand 90447 states and 149897 transitions. Second operand 4 states. [2020-12-22 07:24:48,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:48,061 INFO L93 Difference]: Finished difference Result 299109 states and 496447 transitions. [2020-12-22 07:24:48,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:24:48,062 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 234 [2020-12-22 07:24:48,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:48,494 INFO L225 Difference]: With dead ends: 299109 [2020-12-22 07:24:48,495 INFO L226 Difference]: Without dead ends: 209274 [2020-12-22 07:24:48,630 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:24:48,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209274 states. [2020-12-22 07:24:52,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209274 to 149065. [2020-12-22 07:24:52,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149065 states. [2020-12-22 07:24:53,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149065 states to 149065 states and 246387 transitions. [2020-12-22 07:24:53,056 INFO L78 Accepts]: Start accepts. Automaton has 149065 states and 246387 transitions. Word has length 234 [2020-12-22 07:24:53,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:53,057 INFO L481 AbstractCegarLoop]: Abstraction has 149065 states and 246387 transitions. [2020-12-22 07:24:53,057 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:24:53,057 INFO L276 IsEmpty]: Start isEmpty. Operand 149065 states and 246387 transitions. [2020-12-22 07:24:53,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2020-12-22 07:24:53,059 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:53,060 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:24:53,060 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 07:24:53,060 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:53,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:53,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1193778039, now seen corresponding path program 1 times [2020-12-22 07:24:53,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:53,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187038610] [2020-12-22 07:24:53,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:53,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:53,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:24:53,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187038610] [2020-12-22 07:24:53,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:53,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:24:53,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926221179] [2020-12-22 07:24:53,235 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:24:53,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:53,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:24:53,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:24:53,236 INFO L87 Difference]: Start difference. First operand 149065 states and 246387 transitions. Second operand 4 states. [2020-12-22 07:24:58,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:58,934 INFO L93 Difference]: Finished difference Result 490664 states and 812358 transitions. [2020-12-22 07:24:58,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:24:58,934 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 235 [2020-12-22 07:24:58,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:59,648 INFO L225 Difference]: With dead ends: 490664 [2020-12-22 07:24:59,648 INFO L226 Difference]: Without dead ends: 342211 [2020-12-22 07:24:59,853 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:25:00,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342211 states. [2020-12-22 07:25:06,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342211 to 245111. [2020-12-22 07:25:06,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245111 states. [2020-12-22 07:25:07,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245111 states to 245111 states and 404085 transitions. [2020-12-22 07:25:07,512 INFO L78 Accepts]: Start accepts. Automaton has 245111 states and 404085 transitions. Word has length 235 [2020-12-22 07:25:07,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:25:07,513 INFO L481 AbstractCegarLoop]: Abstraction has 245111 states and 404085 transitions. [2020-12-22 07:25:07,513 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:25:07,513 INFO L276 IsEmpty]: Start isEmpty. Operand 245111 states and 404085 transitions. [2020-12-22 07:25:07,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2020-12-22 07:25:07,515 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:25:07,516 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:25:07,516 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 07:25:07,516 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:25:07,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:25:07,517 INFO L82 PathProgramCache]: Analyzing trace with hash 888014441, now seen corresponding path program 1 times [2020-12-22 07:25:07,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:25:07,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595894932] [2020-12-22 07:25:07,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:25:07,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:25:07,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:25:07,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595894932] [2020-12-22 07:25:07,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:25:07,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:25:07,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46864394] [2020-12-22 07:25:07,684 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:25:07,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:25:07,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:25:07,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:25:07,685 INFO L87 Difference]: Start difference. First operand 245111 states and 404085 transitions. Second operand 4 states. [2020-12-22 07:25:17,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:25:17,722 INFO L93 Difference]: Finished difference Result 802832 states and 1325838 transitions. [2020-12-22 07:25:17,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:25:17,722 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 236 [2020-12-22 07:25:17,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:25:19,359 INFO L225 Difference]: With dead ends: 802832 [2020-12-22 07:25:19,360 INFO L226 Difference]: Without dead ends: 558333 [2020-12-22 07:25:19,681 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:25:20,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558333 states. [2020-12-22 07:25:31,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558333 to 400865. [2020-12-22 07:25:31,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 400865 states. [2020-12-22 07:25:33,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400865 states to 400865 states and 659175 transitions. [2020-12-22 07:25:33,188 INFO L78 Accepts]: Start accepts. Automaton has 400865 states and 659175 transitions. Word has length 236 [2020-12-22 07:25:33,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:25:33,188 INFO L481 AbstractCegarLoop]: Abstraction has 400865 states and 659175 transitions. [2020-12-22 07:25:33,189 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:25:33,192 INFO L276 IsEmpty]: Start isEmpty. Operand 400865 states and 659175 transitions. [2020-12-22 07:25:33,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2020-12-22 07:25:33,194 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:25:33,197 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:25:33,197 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 07:25:33,198 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:25:33,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:25:33,199 INFO L82 PathProgramCache]: Analyzing trace with hash 168281838, now seen corresponding path program 1 times [2020-12-22 07:25:33,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:25:33,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18562906] [2020-12-22 07:25:33,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:25:33,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:25:33,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:25:33,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18562906] [2020-12-22 07:25:33,563 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:25:33,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:25:33,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886281120] [2020-12-22 07:25:33,570 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:25:33,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:25:33,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:25:33,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:25:33,571 INFO L87 Difference]: Start difference. First operand 400865 states and 659175 transitions. Second operand 4 states. [2020-12-22 07:25:54,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:25:54,837 INFO L93 Difference]: Finished difference Result 1299336 states and 2140398 transitions. [2020-12-22 07:25:54,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:25:54,837 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 237 [2020-12-22 07:25:54,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:25:57,303 INFO L225 Difference]: With dead ends: 1299336 [2020-12-22 07:25:57,303 INFO L226 Difference]: Without dead ends: 899083 [2020-12-22 07:25:57,741 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:25:58,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 899083 states. [2020-12-22 07:26:20,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 899083 to 648607. [2020-12-22 07:26:20,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 648607 states. [2020-12-22 07:26:25,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648607 states to 648607 states and 1063905 transitions. [2020-12-22 07:26:25,378 INFO L78 Accepts]: Start accepts. Automaton has 648607 states and 1063905 transitions. Word has length 237 [2020-12-22 07:26:25,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:26:25,379 INFO L481 AbstractCegarLoop]: Abstraction has 648607 states and 1063905 transitions. [2020-12-22 07:26:25,379 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:26:25,379 INFO L276 IsEmpty]: Start isEmpty. Operand 648607 states and 1063905 transitions. [2020-12-22 07:26:25,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2020-12-22 07:26:25,387 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:26:25,389 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:26:25,390 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 07:26:25,390 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:26:25,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:26:25,390 INFO L82 PathProgramCache]: Analyzing trace with hash 500315686, now seen corresponding path program 1 times [2020-12-22 07:26:25,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:26:25,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994662342] [2020-12-22 07:26:25,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:26:25,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:26:26,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:26:26,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994662342] [2020-12-22 07:26:26,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:26:26,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 07:26:26,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620400732] [2020-12-22 07:26:26,139 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 07:26:26,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:26:26,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 07:26:26,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:26:26,141 INFO L87 Difference]: Start difference. First operand 648607 states and 1063905 transitions. Second operand 7 states. [2020-12-22 07:26:47,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:26:47,075 INFO L93 Difference]: Finished difference Result 1296606 states and 2126748 transitions. [2020-12-22 07:26:47,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 07:26:47,075 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 239 [2020-12-22 07:26:47,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:26:48,877 INFO L225 Difference]: With dead ends: 1296606 [2020-12-22 07:26:48,878 INFO L226 Difference]: Without dead ends: 648611 [2020-12-22 07:26:49,401 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2020-12-22 07:26:49,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648611 states. [2020-12-22 07:27:06,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648611 to 648607. [2020-12-22 07:27:06,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 648607 states. [2020-12-22 07:27:11,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648607 states to 648607 states and 1060780 transitions. [2020-12-22 07:27:11,737 INFO L78 Accepts]: Start accepts. Automaton has 648607 states and 1060780 transitions. Word has length 239 [2020-12-22 07:27:11,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:27:11,738 INFO L481 AbstractCegarLoop]: Abstraction has 648607 states and 1060780 transitions. [2020-12-22 07:27:11,738 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 07:27:11,738 INFO L276 IsEmpty]: Start isEmpty. Operand 648607 states and 1060780 transitions. [2020-12-22 07:27:11,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2020-12-22 07:27:11,741 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:27:11,741 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:27:11,741 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 07:27:11,741 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:27:11,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:27:11,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1866662220, now seen corresponding path program 1 times [2020-12-22 07:27:11,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:27:11,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895271936] [2020-12-22 07:27:11,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:27:11,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:27:12,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:27:12,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895271936] [2020-12-22 07:27:12,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:27:12,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 07:27:12,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133112669] [2020-12-22 07:27:12,846 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 07:27:12,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:27:12,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 07:27:12,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:27:12,848 INFO L87 Difference]: Start difference. First operand 648607 states and 1060780 transitions. Second operand 7 states.